java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label15_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 06:36:34,267 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 06:36:34,269 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 06:36:34,285 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 06:36:34,285 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 06:36:34,287 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 06:36:34,288 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 06:36:34,290 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 06:36:34,292 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 06:36:34,292 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 06:36:34,293 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 06:36:34,294 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 06:36:34,295 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 06:36:34,296 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 06:36:34,297 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 06:36:34,300 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 06:36:34,301 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 06:36:34,310 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 06:36:34,315 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 06:36:34,317 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 06:36:34,321 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 06:36:34,323 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 06:36:34,328 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 06:36:34,329 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 06:36:34,329 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 06:36:34,330 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 06:36:34,332 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 06:36:34,332 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 06:36:34,337 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 06:36:34,338 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 06:36:34,339 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 06:36:34,340 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 06:36:34,340 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 06:36:34,340 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 06:36:34,342 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 06:36:34,343 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 06:36:34,343 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 06:36:34,369 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 06:36:34,369 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 06:36:34,370 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 06:36:34,370 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 06:36:34,371 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 06:36:34,371 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 06:36:34,371 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 06:36:34,371 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 06:36:34,371 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 06:36:34,372 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 06:36:34,372 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 06:36:34,372 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 06:36:34,372 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 06:36:34,373 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 06:36:34,373 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 06:36:34,374 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 06:36:34,374 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 06:36:34,374 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 06:36:34,374 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 06:36:34,374 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 06:36:34,375 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 06:36:34,375 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 06:36:34,375 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 06:36:34,375 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 06:36:34,375 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 06:36:34,376 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 06:36:34,376 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 06:36:34,376 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 06:36:34,376 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 06:36:34,377 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 06:36:34,377 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 06:36:34,377 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 06:36:34,377 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 06:36:34,377 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 06:36:34,378 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 06:36:34,378 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 06:36:34,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 06:36:34,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 06:36:34,482 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 06:36:34,484 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 06:36:34,485 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 06:36:34,485 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label15_false-unreach-call.c [2018-11-07 06:36:34,552 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/106286e7d/e5162b417cda4222bf848558eafadefa/FLAG91d5a0e57 [2018-11-07 06:36:35,172 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 06:36:35,173 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label15_false-unreach-call.c [2018-11-07 06:36:35,190 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/106286e7d/e5162b417cda4222bf848558eafadefa/FLAG91d5a0e57 [2018-11-07 06:36:35,206 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/106286e7d/e5162b417cda4222bf848558eafadefa [2018-11-07 06:36:35,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 06:36:35,220 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 06:36:35,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 06:36:35,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 06:36:35,225 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 06:36:35,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:36:35" (1/1) ... [2018-11-07 06:36:35,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502be44a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:35, skipping insertion in model container [2018-11-07 06:36:35,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:36:35" (1/1) ... [2018-11-07 06:36:35,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 06:36:35,335 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 06:36:36,055 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 06:36:36,071 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 06:36:36,393 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 06:36:36,413 INFO L193 MainTranslator]: Completed translation [2018-11-07 06:36:36,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36 WrapperNode [2018-11-07 06:36:36,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 06:36:36,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 06:36:36,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 06:36:36,415 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 06:36:36,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (1/1) ... [2018-11-07 06:36:36,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (1/1) ... [2018-11-07 06:36:36,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 06:36:36,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 06:36:36,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 06:36:36,615 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 06:36:36,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (1/1) ... [2018-11-07 06:36:36,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (1/1) ... [2018-11-07 06:36:36,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (1/1) ... [2018-11-07 06:36:36,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (1/1) ... [2018-11-07 06:36:36,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (1/1) ... [2018-11-07 06:36:36,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (1/1) ... [2018-11-07 06:36:36,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (1/1) ... [2018-11-07 06:36:36,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 06:36:36,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 06:36:36,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 06:36:36,779 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 06:36:36,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 06:36:36,853 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 06:36:36,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 06:36:36,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 06:36:36,854 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 06:36:36,854 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 06:36:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 06:36:36,855 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 06:36:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 06:36:36,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 06:36:36,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 06:36:36,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 06:36:42,936 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 06:36:42,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:36:42 BoogieIcfgContainer [2018-11-07 06:36:42,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 06:36:42,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 06:36:42,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 06:36:42,944 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 06:36:42,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:36:35" (1/3) ... [2018-11-07 06:36:42,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d74a194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:36:42, skipping insertion in model container [2018-11-07 06:36:42,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:36" (2/3) ... [2018-11-07 06:36:42,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d74a194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:36:42, skipping insertion in model container [2018-11-07 06:36:42,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:36:42" (3/3) ... [2018-11-07 06:36:42,948 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label15_false-unreach-call.c [2018-11-07 06:36:42,959 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 06:36:42,968 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 06:36:42,983 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 06:36:43,026 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 06:36:43,026 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 06:36:43,026 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 06:36:43,027 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 06:36:43,027 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 06:36:43,027 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 06:36:43,027 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 06:36:43,027 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 06:36:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 06:36:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-07 06:36:43,074 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:36:43,076 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] [2018-11-07 06:36:43,078 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:36:43,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:36:43,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1965718299, now seen corresponding path program 1 times [2018-11-07 06:36:43,088 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:36:43,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:36:43,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:36:43,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:36:43,146 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:36:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:36:43,573 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-11-07 06:36:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:36:43,589 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:36:43,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 06:36:43,590 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:36:43,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 06:36:43,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 06:36:43,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 06:36:43,630 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-11-07 06:36:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:36:49,431 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-11-07 06:36:49,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 06:36:49,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-11-07 06:36:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:36:49,460 INFO L225 Difference]: With dead ends: 1513 [2018-11-07 06:36:49,461 INFO L226 Difference]: Without dead ends: 1097 [2018-11-07 06:36:49,472 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 06:36:49,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-11-07 06:36:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 744. [2018-11-07 06:36:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-11-07 06:36:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1357 transitions. [2018-11-07 06:36:49,631 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1357 transitions. Word has length 29 [2018-11-07 06:36:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:36:49,632 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1357 transitions. [2018-11-07 06:36:49,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 06:36:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1357 transitions. [2018-11-07 06:36:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-11-07 06:36:49,640 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:36:49,641 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:36:49,641 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:36:49,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:36:49,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2135341492, now seen corresponding path program 1 times [2018-11-07 06:36:49,642 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:36:49,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:36:49,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:36:49,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:36:49,644 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:36:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:36:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:36:49,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:36:49,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 06:36:49,958 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:36:49,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 06:36:49,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 06:36:49,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 06:36:49,961 INFO L87 Difference]: Start difference. First operand 744 states and 1357 transitions. Second operand 5 states. [2018-11-07 06:36:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:36:54,026 INFO L93 Difference]: Finished difference Result 2196 states and 4092 transitions. [2018-11-07 06:36:54,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 06:36:54,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2018-11-07 06:36:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:36:54,045 INFO L225 Difference]: With dead ends: 2196 [2018-11-07 06:36:54,045 INFO L226 Difference]: Without dead ends: 1458 [2018-11-07 06:36:54,049 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 06:36:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2018-11-07 06:36:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1438. [2018-11-07 06:36:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2018-11-07 06:36:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2551 transitions. [2018-11-07 06:36:54,138 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2551 transitions. Word has length 99 [2018-11-07 06:36:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:36:54,138 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 2551 transitions. [2018-11-07 06:36:54,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 06:36:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2551 transitions. [2018-11-07 06:36:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-07 06:36:54,146 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:36:54,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:36:54,146 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:36:54,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:36:54,147 INFO L82 PathProgramCache]: Analyzing trace with hash 558578681, now seen corresponding path program 1 times [2018-11-07 06:36:54,147 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:36:54,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:36:54,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:36:54,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:36:54,148 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:36:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:36:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:36:54,391 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:36:54,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 06:36:54,392 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:36:54,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 06:36:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 06:36:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 06:36:54,393 INFO L87 Difference]: Start difference. First operand 1438 states and 2551 transitions. Second operand 6 states. [2018-11-07 06:36:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:36:59,528 INFO L93 Difference]: Finished difference Result 4237 states and 7540 transitions. [2018-11-07 06:36:59,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 06:36:59,530 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2018-11-07 06:36:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:36:59,549 INFO L225 Difference]: With dead ends: 4237 [2018-11-07 06:36:59,549 INFO L226 Difference]: Without dead ends: 2805 [2018-11-07 06:36:59,559 INFO L604 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 [2018-11-07 06:36:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2018-11-07 06:36:59,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2785. [2018-11-07 06:36:59,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2785 states. [2018-11-07 06:36:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4352 transitions. [2018-11-07 06:36:59,638 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4352 transitions. Word has length 102 [2018-11-07 06:36:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:36:59,639 INFO L480 AbstractCegarLoop]: Abstraction has 2785 states and 4352 transitions. [2018-11-07 06:36:59,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 06:36:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4352 transitions. [2018-11-07 06:36:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-07 06:36:59,641 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:36:59,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:36:59,642 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:36:59,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:36:59,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2114066796, now seen corresponding path program 1 times [2018-11-07 06:36:59,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:36:59,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:36:59,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:36:59,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:36:59,644 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:36:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:36:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:36:59,840 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:36:59,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 06:36:59,840 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:36:59,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 06:36:59,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 06:36:59,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 06:36:59,842 INFO L87 Difference]: Start difference. First operand 2785 states and 4352 transitions. Second operand 6 states. [2018-11-07 06:37:03,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:37:03,652 INFO L93 Difference]: Finished difference Result 6952 states and 11048 transitions. [2018-11-07 06:37:03,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 06:37:03,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2018-11-07 06:37:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:37:03,678 INFO L225 Difference]: With dead ends: 6952 [2018-11-07 06:37:03,679 INFO L226 Difference]: Without dead ends: 4173 [2018-11-07 06:37:03,695 INFO L604 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 [2018-11-07 06:37:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2018-11-07 06:37:03,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 4153. [2018-11-07 06:37:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4153 states. [2018-11-07 06:37:03,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 5896 transitions. [2018-11-07 06:37:03,822 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 5896 transitions. Word has length 103 [2018-11-07 06:37:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:37:03,823 INFO L480 AbstractCegarLoop]: Abstraction has 4153 states and 5896 transitions. [2018-11-07 06:37:03,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 06:37:03,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 5896 transitions. [2018-11-07 06:37:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-11-07 06:37:03,825 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:37:03,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:37:03,825 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:37:03,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:37:03,829 INFO L82 PathProgramCache]: Analyzing trace with hash -377282367, now seen corresponding path program 1 times [2018-11-07 06:37:03,830 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:37:03,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:37:03,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:37:03,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:37:03,831 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:37:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:37:04,099 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 06:37:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:37:04,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:37:04,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 06:37:04,499 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:37:04,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 06:37:04,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 06:37:04,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 06:37:04,503 INFO L87 Difference]: Start difference. First operand 4153 states and 5896 transitions. Second operand 6 states. [2018-11-07 06:37:08,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:37:08,604 INFO L93 Difference]: Finished difference Result 11374 states and 16767 transitions. [2018-11-07 06:37:08,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 06:37:08,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2018-11-07 06:37:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:37:08,646 INFO L225 Difference]: With dead ends: 11374 [2018-11-07 06:37:08,646 INFO L226 Difference]: Without dead ends: 7227 [2018-11-07 06:37:08,677 INFO L604 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 [2018-11-07 06:37:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states. [2018-11-07 06:37:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7227 to 7152. [2018-11-07 06:37:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7152 states. [2018-11-07 06:37:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 9826 transitions. [2018-11-07 06:37:08,887 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 9826 transitions. Word has length 106 [2018-11-07 06:37:08,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:37:08,888 INFO L480 AbstractCegarLoop]: Abstraction has 7152 states and 9826 transitions. [2018-11-07 06:37:08,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 06:37:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 9826 transitions. [2018-11-07 06:37:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-11-07 06:37:08,891 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:37:08,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:37:08,891 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:37:08,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:37:08,892 INFO L82 PathProgramCache]: Analyzing trace with hash -996963759, now seen corresponding path program 1 times [2018-11-07 06:37:08,892 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:37:08,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:37:08,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:37:08,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:37:08,893 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:37:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:37:09,142 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 06:37:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:37:09,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:37:09,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 06:37:09,416 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:37:09,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 06:37:09,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 06:37:09,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 06:37:09,418 INFO L87 Difference]: Start difference. First operand 7152 states and 9826 transitions. Second operand 6 states. [2018-11-07 06:37:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:37:12,911 INFO L93 Difference]: Finished difference Result 17771 states and 25546 transitions. [2018-11-07 06:37:12,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 06:37:12,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2018-11-07 06:37:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:37:12,970 INFO L225 Difference]: With dead ends: 17771 [2018-11-07 06:37:12,971 INFO L226 Difference]: Without dead ends: 10625 [2018-11-07 06:37:12,998 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 06:37:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10625 states. [2018-11-07 06:37:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10625 to 10585. [2018-11-07 06:37:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10585 states. [2018-11-07 06:37:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 13819 transitions. [2018-11-07 06:37:13,258 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 13819 transitions. Word has length 114 [2018-11-07 06:37:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:37:13,258 INFO L480 AbstractCegarLoop]: Abstraction has 10585 states and 13819 transitions. [2018-11-07 06:37:13,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 06:37:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 13819 transitions. [2018-11-07 06:37:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-07 06:37:13,260 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:37:13,260 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:37:13,261 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:37:13,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:37:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1532470232, now seen corresponding path program 1 times [2018-11-07 06:37:13,261 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:37:13,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:37:13,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:37:13,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:37:13,263 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:37:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:37:13,499 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 06:37:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 06:37:13,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:37:13,808 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:37:13,809 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 122 with the following transitions: [2018-11-07 06:37:13,812 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [311], [313], [316], [324], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 06:37:13,889 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:37:13,889 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:37:14,713 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 06:37:14,716 INFO L272 AbstractInterpreter]: Visited 99 different actions 284 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 06:37:14,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:37:14,765 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 06:37:15,103 INFO L227 lantSequenceWeakener]: Weakened 118 states. On average, predicates are now at 80.32% of their original sizes. [2018-11-07 06:37:15,104 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 06:37:15,834 INFO L415 sIntCurrentIteration]: We unified 120 AI predicates to 120 [2018-11-07 06:37:15,834 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 06:37:15,835 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 06:37:15,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2018-11-07 06:37:15,835 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:37:15,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 06:37:15,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 06:37:15,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-07 06:37:15,836 INFO L87 Difference]: Start difference. First operand 10585 states and 13819 transitions. Second operand 10 states. [2018-11-07 06:38:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:38:44,417 INFO L93 Difference]: Finished difference Result 26688 states and 34362 transitions. [2018-11-07 06:38:44,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-07 06:38:44,417 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 121 [2018-11-07 06:38:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:38:44,473 INFO L225 Difference]: With dead ends: 26688 [2018-11-07 06:38:44,473 INFO L226 Difference]: Without dead ends: 16109 [2018-11-07 06:38:44,521 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2018-11-07 06:38:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16109 states. [2018-11-07 06:38:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16109 to 16053. [2018-11-07 06:38:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16053 states. [2018-11-07 06:38:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16053 states to 16053 states and 19665 transitions. [2018-11-07 06:38:44,846 INFO L78 Accepts]: Start accepts. Automaton has 16053 states and 19665 transitions. Word has length 121 [2018-11-07 06:38:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:38:44,847 INFO L480 AbstractCegarLoop]: Abstraction has 16053 states and 19665 transitions. [2018-11-07 06:38:44,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 06:38:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 16053 states and 19665 transitions. [2018-11-07 06:38:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2018-11-07 06:38:44,866 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:38:44,866 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:38:44,867 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:38:44,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:38:44,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1033951190, now seen corresponding path program 1 times [2018-11-07 06:38:44,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:38:44,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:38:44,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:38:44,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:38:44,869 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:38:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:38:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 299 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-11-07 06:38:45,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:38:45,456 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:38:45,457 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 516 with the following transitions: [2018-11-07 06:38:45,457 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [311], [313], [316], [324], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 06:38:45,470 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:38:45,470 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:38:46,136 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:38:46,137 INFO L272 AbstractInterpreter]: Visited 250 different actions 994 times. Merged at 8 different actions 29 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 06:38:46,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:38:46,176 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:38:46,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:38:46,176 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:38:46,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:38:46,193 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:38:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:38:46,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:38:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 299 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-11-07 06:38:47,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:38:47,554 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 06:38:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 299 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-11-07 06:38:48,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:38:48,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 06:38:48,085 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:38:48,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 06:38:48,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 06:38:48,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-07 06:38:48,087 INFO L87 Difference]: Start difference. First operand 16053 states and 19665 transitions. Second operand 9 states. [2018-11-07 06:38:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:38:57,158 INFO L93 Difference]: Finished difference Result 40377 states and 52477 transitions. [2018-11-07 06:38:57,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 06:38:57,159 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 515 [2018-11-07 06:38:57,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:38:57,340 INFO L225 Difference]: With dead ends: 40377 [2018-11-07 06:38:57,340 INFO L226 Difference]: Without dead ends: 24668 [2018-11-07 06:38:57,532 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1051 GetRequests, 1033 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2018-11-07 06:38:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24668 states. [2018-11-07 06:38:58,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24668 to 24619. [2018-11-07 06:38:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24619 states. [2018-11-07 06:38:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24619 states to 24619 states and 29776 transitions. [2018-11-07 06:38:58,372 INFO L78 Accepts]: Start accepts. Automaton has 24619 states and 29776 transitions. Word has length 515 [2018-11-07 06:38:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:38:58,372 INFO L480 AbstractCegarLoop]: Abstraction has 24619 states and 29776 transitions. [2018-11-07 06:38:58,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 06:38:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24619 states and 29776 transitions. [2018-11-07 06:38:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2018-11-07 06:38:58,488 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:38:58,489 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:38:58,490 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:38:58,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:38:58,490 INFO L82 PathProgramCache]: Analyzing trace with hash -582809478, now seen corresponding path program 1 times [2018-11-07 06:38:58,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:38:58,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:38:58,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:38:58,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:38:58,492 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:38:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:39:00,183 WARN L179 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-11-07 06:39:00,535 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-11-07 06:39:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 116 proven. 880 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-07 06:39:02,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:39:02,378 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:39:02,378 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 859 with the following transitions: [2018-11-07 06:39:02,379 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [311], [313], [316], [324], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [964], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1176], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1392], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 06:39:02,390 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:39:02,391 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:39:03,438 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 06:39:03,438 INFO L272 AbstractInterpreter]: Visited 260 different actions 514 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 06:39:03,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:39:03,474 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 06:39:04,852 INFO L227 lantSequenceWeakener]: Weakened 855 states. On average, predicates are now at 77.39% of their original sizes. [2018-11-07 06:39:04,852 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 06:39:05,605 INFO L415 sIntCurrentIteration]: We unified 857 AI predicates to 857 [2018-11-07 06:39:05,605 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 06:39:05,606 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 06:39:05,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2018-11-07 06:39:05,606 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:39:05,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 06:39:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 06:39:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-07 06:39:05,608 INFO L87 Difference]: Start difference. First operand 24619 states and 29776 transitions. Second operand 10 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown