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/Problem16_label32_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:22:44,399 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:22:44,403 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:22:44,420 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:22:44,420 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:22:44,422 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:22:44,424 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:22:44,427 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:22:44,430 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:22:44,436 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:22:44,437 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:22:44,438 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:22:44,439 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:22:44,440 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:22:44,441 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:22:44,442 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:22:44,443 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:22:44,445 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:22:44,447 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:22:44,448 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:22:44,449 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:22:44,451 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:22:44,453 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 08:22:44,454 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 08:22:44,454 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 08:22:44,459 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 08:22:44,460 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 08:22:44,461 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 08:22:44,464 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 08:22:44,465 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 08:22:44,465 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 08:22:44,468 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 08:22:44,468 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 08:22:44,468 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 08:22:44,471 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 08:22:44,472 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 08:22:44,472 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:22:44,501 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:22:44,501 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:22:44,502 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:22:44,502 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:22:44,503 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:22:44,503 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:22:44,503 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:22:44,503 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:22:44,503 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:22:44,504 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:22:44,504 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:22:44,504 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:22:44,504 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:22:44,504 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:22:44,505 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:22:44,505 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:22:44,506 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:22:44,506 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:22:44,506 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:22:44,506 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:22:44,506 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:22:44,507 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:22:44,507 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:22:44,507 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:22:44,507 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:22:44,507 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:22:44,508 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:22:44,508 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:22:44,508 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:22:44,508 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:22:44,508 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:22:44,509 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:22:44,509 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:22:44,509 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:22:44,509 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:22:44,510 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:22:44,578 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:22:44,594 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:22:44,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:22:44,601 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:22:44,601 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:22:44,602 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label32_true-unreach-call.c [2018-10-27 08:22:44,667 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a54270520/5b2e5c21506a431eb6e25f11203b3f44/FLAG21d0948a7 [2018-10-27 08:22:45,373 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:22:45,375 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label32_true-unreach-call.c [2018-10-27 08:22:45,394 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a54270520/5b2e5c21506a431eb6e25f11203b3f44/FLAG21d0948a7 [2018-10-27 08:22:45,412 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a54270520/5b2e5c21506a431eb6e25f11203b3f44 [2018-10-27 08:22:45,424 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:22:45,426 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:22:45,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:22:45,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:22:45,433 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:22:45,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:22:45" (1/1) ... [2018-10-27 08:22:45,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67ec92cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:45, skipping insertion in model container [2018-10-27 08:22:45,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:22:45" (1/1) ... [2018-10-27 08:22:45,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:22:45,558 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:22:46,252 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:22:46,256 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:22:46,513 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:22:46,534 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:22:46,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46 WrapperNode [2018-10-27 08:22:46,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:22:46,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:22:46,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:22:46,536 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:22:46,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (1/1) ... [2018-10-27 08:22:46,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (1/1) ... [2018-10-27 08:22:46,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:22:46,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:22:46,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:22:46,856 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:22:46,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (1/1) ... [2018-10-27 08:22:46,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (1/1) ... [2018-10-27 08:22:46,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (1/1) ... [2018-10-27 08:22:46,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (1/1) ... [2018-10-27 08:22:46,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (1/1) ... [2018-10-27 08:22:46,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (1/1) ... [2018-10-27 08:22:46,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (1/1) ... [2018-10-27 08:22:47,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:22:47,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:22:47,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:22:47,007 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:22:47,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:22:47,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:22:47,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:22:47,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 08:22:47,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 08:22:47,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:22:47,078 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:22:47,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:22:47,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:22:47,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:22:47,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:22:52,995 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:22:52,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:22:52 BoogieIcfgContainer [2018-10-27 08:22:52,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:22:52,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:22:52,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:22:53,003 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:22:53,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:22:45" (1/3) ... [2018-10-27 08:22:53,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c09c3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:22:53, skipping insertion in model container [2018-10-27 08:22:53,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:22:46" (2/3) ... [2018-10-27 08:22:53,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c09c3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:22:53, skipping insertion in model container [2018-10-27 08:22:53,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:22:52" (3/3) ... [2018-10-27 08:22:53,010 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label32_true-unreach-call.c [2018-10-27 08:22:53,019 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:22:53,028 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:22:53,045 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:22:53,085 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:22:53,086 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:22:53,086 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:22:53,086 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:22:53,086 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:22:53,086 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:22:53,086 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:22:53,087 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:22:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-10-27 08:22:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-27 08:22:53,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:22:53,131 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] [2018-10-27 08:22:53,134 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:22:53,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:22:53,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1067994659, now seen corresponding path program 1 times [2018-10-27 08:22:53,142 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:22:53,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:22:53,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:22:53,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:22:53,192 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:22:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:22:53,604 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 08:22:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:22:53,712 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:22:53,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 08:22:53,713 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:22:53,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:22:53,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:22:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:22:53,740 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-10-27 08:22:57,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:22:57,926 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-10-27 08:22:57,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:22:57,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2018-10-27 08:22:57,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:22:57,957 INFO L225 Difference]: With dead ends: 1156 [2018-10-27 08:22:57,957 INFO L226 Difference]: Without dead ends: 744 [2018-10-27 08:22:57,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 08:22:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-10-27 08:22:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-10-27 08:22:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-10-27 08:22:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1355 transitions. [2018-10-27 08:22:58,078 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1355 transitions. Word has length 55 [2018-10-27 08:22:58,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:22:58,079 INFO L481 AbstractCegarLoop]: Abstraction has 744 states and 1355 transitions. [2018-10-27 08:22:58,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:22:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1355 transitions. [2018-10-27 08:22:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-27 08:22:58,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:22:58,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:22:58,088 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:22:58,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:22:58,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1474010228, now seen corresponding path program 1 times [2018-10-27 08:22:58,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:22:58,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:22:58,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:22:58,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:22:58,090 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:22:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:22:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:22:58,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:22:58,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 08:22:58,466 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:22:58,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 08:22:58,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 08:22:58,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 08:22:58,472 INFO L87 Difference]: Start difference. First operand 744 states and 1355 transitions. Second operand 5 states. [2018-10-27 08:23:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:23:04,254 INFO L93 Difference]: Finished difference Result 2194 states and 4083 transitions. [2018-10-27 08:23:04,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:23:04,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2018-10-27 08:23:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:23:04,269 INFO L225 Difference]: With dead ends: 2194 [2018-10-27 08:23:04,269 INFO L226 Difference]: Without dead ends: 1456 [2018-10-27 08:23:04,273 INFO L605 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 [2018-10-27 08:23:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2018-10-27 08:23:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1436. [2018-10-27 08:23:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2018-10-27 08:23:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2550 transitions. [2018-10-27 08:23:04,337 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2550 transitions. Word has length 125 [2018-10-27 08:23:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:23:04,337 INFO L481 AbstractCegarLoop]: Abstraction has 1436 states and 2550 transitions. [2018-10-27 08:23:04,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 08:23:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2550 transitions. [2018-10-27 08:23:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-27 08:23:04,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:23:04,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:23:04,342 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:23:04,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:23:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1726683851, now seen corresponding path program 1 times [2018-10-27 08:23:04,343 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:23:04,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:23:04,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:23:04,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:23:04,345 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:23:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:23:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:23:04,665 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:23:04,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:23:04,666 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:23:04,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:23:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:23:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:23:04,667 INFO L87 Difference]: Start difference. First operand 1436 states and 2550 transitions. Second operand 6 states. [2018-10-27 08:23:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:23:10,682 INFO L93 Difference]: Finished difference Result 3936 states and 7024 transitions. [2018-10-27 08:23:10,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:23:10,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 154 [2018-10-27 08:23:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:23:10,708 INFO L225 Difference]: With dead ends: 3936 [2018-10-27 08:23:10,708 INFO L226 Difference]: Without dead ends: 2506 [2018-10-27 08:23:10,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:23:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2018-10-27 08:23:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2479. [2018-10-27 08:23:10,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2479 states. [2018-10-27 08:23:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3996 transitions. [2018-10-27 08:23:10,802 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3996 transitions. Word has length 154 [2018-10-27 08:23:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:23:10,804 INFO L481 AbstractCegarLoop]: Abstraction has 2479 states and 3996 transitions. [2018-10-27 08:23:10,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:23:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3996 transitions. [2018-10-27 08:23:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-27 08:23:10,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:23:10,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:23:10,810 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:23:10,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:23:10,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1509581241, now seen corresponding path program 1 times [2018-10-27 08:23:10,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:23:10,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:23:10,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:23:10,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:23:10,812 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:23:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:23:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:23:11,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:23:11,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:23:11,146 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:23:11,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:23:11,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:23:11,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:23:11,147 INFO L87 Difference]: Start difference. First operand 2479 states and 3996 transitions. Second operand 6 states. [2018-10-27 08:23:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:23:14,569 INFO L93 Difference]: Finished difference Result 6050 states and 9896 transitions. [2018-10-27 08:23:14,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:23:14,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2018-10-27 08:23:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:23:14,589 INFO L225 Difference]: With dead ends: 6050 [2018-10-27 08:23:14,589 INFO L226 Difference]: Without dead ends: 3577 [2018-10-27 08:23:14,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:23:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2018-10-27 08:23:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 3545. [2018-10-27 08:23:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3545 states. [2018-10-27 08:23:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 4965 transitions. [2018-10-27 08:23:14,698 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 4965 transitions. Word has length 172 [2018-10-27 08:23:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:23:14,699 INFO L481 AbstractCegarLoop]: Abstraction has 3545 states and 4965 transitions. [2018-10-27 08:23:14,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:23:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 4965 transitions. [2018-10-27 08:23:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-27 08:23:14,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:23:14,704 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:23:14,705 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:23:14,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:23:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2114046403, now seen corresponding path program 1 times [2018-10-27 08:23:14,705 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:23:14,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:23:14,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:23:14,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:23:14,707 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:23:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:23:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 115 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 08:23:15,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:23:15,120 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:23:15,122 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 256 with the following transitions: [2018-10-27 08:23:15,126 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [519], [521], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [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], [912], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:23:15,204 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:23:15,204 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:23:15,858 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:23:15,861 INFO L272 AbstractInterpreter]: Visited 135 different actions 135 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 08:23:15,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:23:15,898 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:23:16,347 INFO L227 lantSequenceWeakener]: Weakened 246 states. On average, predicates are now at 77.99% of their original sizes. [2018-10-27 08:23:16,347 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:23:16,594 INFO L415 sIntCurrentIteration]: We unified 254 AI predicates to 254 [2018-10-27 08:23:16,594 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:23:16,595 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:23:16,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2018-10-27 08:23:16,596 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:23:16,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:23:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:23:16,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:23:16,597 INFO L87 Difference]: Start difference. First operand 3545 states and 4965 transitions. Second operand 6 states. [2018-10-27 08:24:11,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:24:11,502 INFO L93 Difference]: Finished difference Result 7424 states and 10344 transitions. [2018-10-27 08:24:11,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 08:24:11,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2018-10-27 08:24:11,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:24:11,520 INFO L225 Difference]: With dead ends: 7424 [2018-10-27 08:24:11,520 INFO L226 Difference]: Without dead ends: 3885 [2018-10-27 08:24:11,532 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:24:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2018-10-27 08:24:11,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3883. [2018-10-27 08:24:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3883 states. [2018-10-27 08:24:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 5311 transitions. [2018-10-27 08:24:11,618 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 5311 transitions. Word has length 255 [2018-10-27 08:24:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:24:11,619 INFO L481 AbstractCegarLoop]: Abstraction has 3883 states and 5311 transitions. [2018-10-27 08:24:11,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:24:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 5311 transitions. [2018-10-27 08:24:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-10-27 08:24:11,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:24:11,627 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-27 08:24:11,628 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:24:11,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:24:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash -877306342, now seen corresponding path program 1 times [2018-10-27 08:24:11,629 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:24:11,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:24:11,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:24:11,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:24:11,630 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:24:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:24:11,945 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-27 08:24:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 216 proven. 115 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-27 08:24:12,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:24:12,444 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:24:12,445 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 348 with the following transitions: [2018-10-27 08:24:12,445 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [519], [521], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [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], [912], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:24:12,450 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:24:12,451 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:24:12,685 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:24:12,685 INFO L272 AbstractInterpreter]: Visited 139 different actions 404 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 08:24:12,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:24:12,694 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:24:13,082 INFO L227 lantSequenceWeakener]: Weakened 344 states. On average, predicates are now at 80.54% of their original sizes. [2018-10-27 08:24:13,083 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:24:13,336 INFO L415 sIntCurrentIteration]: We unified 346 AI predicates to 346 [2018-10-27 08:24:13,337 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:24:13,337 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:24:13,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-10-27 08:24:13,337 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:24:13,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 08:24:13,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 08:24:13,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 08:24:13,339 INFO L87 Difference]: Start difference. First operand 3883 states and 5311 transitions. Second operand 10 states. [2018-10-27 08:25:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:25:17,788 INFO L93 Difference]: Finished difference Result 9062 states and 12453 transitions. [2018-10-27 08:25:17,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-27 08:25:17,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 347 [2018-10-27 08:25:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:25:17,811 INFO L225 Difference]: With dead ends: 9062 [2018-10-27 08:25:17,811 INFO L226 Difference]: Without dead ends: 5523 [2018-10-27 08:25:17,827 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 356 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2018-10-27 08:25:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2018-10-27 08:25:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5486. [2018-10-27 08:25:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5486 states. [2018-10-27 08:25:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 7100 transitions. [2018-10-27 08:25:17,951 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 7100 transitions. Word has length 347 [2018-10-27 08:25:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:25:17,952 INFO L481 AbstractCegarLoop]: Abstraction has 5486 states and 7100 transitions. [2018-10-27 08:25:17,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 08:25:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 7100 transitions. [2018-10-27 08:25:17,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-10-27 08:25:17,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:25:17,970 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 08:25:17,970 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:25:17,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:25:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1298493058, now seen corresponding path program 1 times [2018-10-27 08:25:17,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:25:17,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:25:17,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:25:17,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:25:17,972 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:25:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:25:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 236 proven. 46 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-27 08:25:18,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:25:18,666 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:25:18,667 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 496 with the following transitions: [2018-10-27 08:25:18,667 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [519], [521], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [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], [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] [2018-10-27 08:25:18,675 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:25:18,675 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:25:19,307 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:25:19,308 INFO L272 AbstractInterpreter]: Visited 250 different actions 745 times. Merged at 8 different actions 19 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 08:25:19,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:25:19,349 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:25:19,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:25:19,349 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:25:19,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:25:19,366 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:25:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:25:19,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:25:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-27 08:25:19,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:25:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-10-27 08:25:20,371 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:25:20,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2018-10-27 08:25:20,372 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:25:20,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:25:20,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:25:20,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:25:20,375 INFO L87 Difference]: Start difference. First operand 5486 states and 7100 transitions. Second operand 3 states. [2018-10-27 08:25:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:25:22,978 INFO L93 Difference]: Finished difference Result 10628 states and 13855 transitions. [2018-10-27 08:25:22,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:25:22,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2018-10-27 08:25:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:25:23,012 INFO L225 Difference]: With dead ends: 10628 [2018-10-27 08:25:23,013 INFO L226 Difference]: Without dead ends: 5486 [2018-10-27 08:25:23,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 991 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:25:23,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2018-10-27 08:25:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5486. [2018-10-27 08:25:23,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5486 states. [2018-10-27 08:25:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 6798 transitions. [2018-10-27 08:25:23,191 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 6798 transitions. Word has length 495 [2018-10-27 08:25:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:25:23,192 INFO L481 AbstractCegarLoop]: Abstraction has 5486 states and 6798 transitions. [2018-10-27 08:25:23,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:25:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 6798 transitions. [2018-10-27 08:25:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-10-27 08:25:23,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:25:23,213 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:25:23,213 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:25:23,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:25:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1179913331, now seen corresponding path program 1 times [2018-10-27 08:25:23,214 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:25:23,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:25:23,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:25:23,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:25:23,215 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:25:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:25:23,756 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-27 08:25:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 72 proven. 243 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 08:25:24,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:25:24,681 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:25:24,682 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 520 with the following transitions: [2018-10-27 08:25:24,682 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [519], [521], [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], [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], [1288], [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] [2018-10-27 08:25:24,689 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:25:24,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:25:25,384 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:25:25,385 INFO L272 AbstractInterpreter]: Visited 248 different actions 743 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 08:25:25,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:25:25,422 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:25:26,149 INFO L227 lantSequenceWeakener]: Weakened 516 states. On average, predicates are now at 80.36% of their original sizes. [2018-10-27 08:25:26,149 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:25:26,756 INFO L415 sIntCurrentIteration]: We unified 518 AI predicates to 518 [2018-10-27 08:25:26,757 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:25:26,757 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:25:26,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2018-10-27 08:25:26,758 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:25:26,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:25:26,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:25:26,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:25:26,760 INFO L87 Difference]: Start difference. First operand 5486 states and 6798 transitions. Second operand 9 states. [2018-10-27 08:25:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:25:56,330 INFO L93 Difference]: Finished difference Result 12751 states and 15845 transitions. [2018-10-27 08:25:56,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 08:25:56,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 519 [2018-10-27 08:25:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:25:56,358 INFO L225 Difference]: With dead ends: 12751 [2018-10-27 08:25:56,358 INFO L226 Difference]: Without dead ends: 7609 [2018-10-27 08:25:56,377 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 525 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-10-27 08:25:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7609 states. [2018-10-27 08:25:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7609 to 7589. [2018-10-27 08:25:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7589 states. [2018-10-27 08:25:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 9148 transitions. [2018-10-27 08:25:56,549 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 9148 transitions. Word has length 519 [2018-10-27 08:25:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:25:56,550 INFO L481 AbstractCegarLoop]: Abstraction has 7589 states and 9148 transitions. [2018-10-27 08:25:56,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:25:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 9148 transitions. [2018-10-27 08:25:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2018-10-27 08:25:56,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:25:56,578 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 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] [2018-10-27 08:25:56,578 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:25:56,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:25:56,579 INFO L82 PathProgramCache]: Analyzing trace with hash 157071486, now seen corresponding path program 1 times [2018-10-27 08:25:56,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:25:56,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:25:56,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:25:56,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:25:56,580 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:25:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:25:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 435 proven. 115 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-10-27 08:25:57,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:25:57,552 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:25:57,552 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 659 with the following transitions: [2018-10-27 08:25:57,553 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [519], [521], [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], [860], [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] [2018-10-27 08:25:57,558 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:25:57,558 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:25:58,518 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:25:58,519 INFO L272 AbstractInterpreter]: Visited 251 different actions 1000 times. Merged at 9 different actions 31 times. Never widened. Found 7 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-27 08:25:58,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:25:58,554 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:25:58,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:25:58,554 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:25:58,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:25:58,562 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:25:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:25:58,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:25:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 726 proven. 2 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2018-10-27 08:25:59,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:25:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 435 proven. 115 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-10-27 08:25:59,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:25:59,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 08:25:59,522 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:25:59,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:25:59,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:25:59,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:25:59,524 INFO L87 Difference]: Start difference. First operand 7589 states and 9148 transitions. Second operand 9 states. [2018-10-27 08:26:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:26:08,485 INFO L93 Difference]: Finished difference Result 17428 states and 22079 transitions. [2018-10-27 08:26:08,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 08:26:08,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 658 [2018-10-27 08:26:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:26:08,529 INFO L225 Difference]: With dead ends: 17428 [2018-10-27 08:26:08,529 INFO L226 Difference]: Without dead ends: 10183 [2018-10-27 08:26:08,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1337 GetRequests, 1319 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2018-10-27 08:26:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10183 states. [2018-10-27 08:26:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10183 to 10159. [2018-10-27 08:26:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10159 states. [2018-10-27 08:26:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10159 states to 10159 states and 12446 transitions. [2018-10-27 08:26:08,779 INFO L78 Accepts]: Start accepts. Automaton has 10159 states and 12446 transitions. Word has length 658 [2018-10-27 08:26:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:26:08,780 INFO L481 AbstractCegarLoop]: Abstraction has 10159 states and 12446 transitions. [2018-10-27 08:26:08,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:26:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 10159 states and 12446 transitions. [2018-10-27 08:26:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-10-27 08:26:08,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:26:08,840 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 08:26:08,840 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:26:08,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:26:08,841 INFO L82 PathProgramCache]: Analyzing trace with hash -720232242, now seen corresponding path program 1 times [2018-10-27 08:26:08,841 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:26:08,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:26:08,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:26:08,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:26:08,842 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:26:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:26:10,545 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-27 08:26:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 273 proven. 908 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2018-10-27 08:26:12,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:26:12,382 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:26:12,382 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 904 with the following transitions: [2018-10-27 08:26:12,382 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [519], [521], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [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], [972], [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], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1392], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:26:12,387 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:26:12,387 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:26:12,594 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:26:12,594 INFO L272 AbstractInterpreter]: Visited 261 different actions 516 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 08:26:12,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:26:12,602 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:26:13,433 INFO L227 lantSequenceWeakener]: Weakened 900 states. On average, predicates are now at 77.53% of their original sizes. [2018-10-27 08:26:13,433 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:26:13,538 INFO L415 sIntCurrentIteration]: We unified 902 AI predicates to 902 [2018-10-27 08:26:13,538 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:26:13,538 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:26:13,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2018-10-27 08:26:13,539 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:26:13,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 08:26:13,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 08:26:13,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 08:26:13,540 INFO L87 Difference]: Start difference. First operand 10159 states and 12446 transitions. Second operand 10 states. Received shutdown request... [2018-10-27 08:26:34,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 08:26:34,941 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 08:26:34,946 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 08:26:34,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:26:34 BoogieIcfgContainer [2018-10-27 08:26:34,946 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 08:26:34,947 INFO L168 Benchmark]: Toolchain (without parser) took 229522.39 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -559.3 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-10-27 08:26:34,948 INFO L168 Benchmark]: CDTParser took 0.19 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. [2018-10-27 08:26:34,949 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1108.08 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. [2018-10-27 08:26:34,949 INFO L168 Benchmark]: Boogie Procedure Inliner took 320.30 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 754.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -867.3 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-10-27 08:26:34,950 INFO L168 Benchmark]: Boogie Preprocessor took 150.75 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: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2018-10-27 08:26:34,951 INFO L168 Benchmark]: RCFGBuilder took 5989.42 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: 240.9 MB). Peak memory consumption was 240.9 MB. Max. memory is 7.1 GB. [2018-10-27 08:26:34,952 INFO L168 Benchmark]: TraceAbstraction took 221948.94 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.9 GB in the beginning and 2.0 GB in the end (delta: -31.3 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-10-27 08:26:34,957 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 1108.08 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 320.30 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 754.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -867.3 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.75 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: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5989.42 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: 240.9 MB). Peak memory consumption was 240.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221948.94 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.9 GB in the beginning and 2.0 GB in the end (delta: -31.3 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 151]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 151). Cancelled while BasicCegarLoop was constructing difference of abstraction (10159states) and FLOYD_HOARE automaton (currently 12 states, 10 states before enhancement),while ReachableStatesComputation was computing reachable states (6027 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 221.8s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 201.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2498 SDtfs, 15574 SDslu, 1438 SDs, 0 SdLazy, 18978 SolverSat, 4759 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 152.0s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 4413 GetRequests, 4311 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10159occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.6s AbstIntTime, 6 AbstIntIterations, 4 AbstIntStrong, 0.9980461038912007 AbsIntWeakeningRatio, 0.06336633663366337 AbsIntAvgWeakeningVarsNumRemoved, 16.197524752475246 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 162 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 4836 NumberOfCodeBlocks, 4836 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 5975 ConstructedInterpolants, 0 QuantifiedInterpolants, 15323494 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1642 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 4849/6439 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown