java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label41_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 11:05:40,396 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 11:05:40,398 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 11:05:40,412 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 11:05:40,413 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 11:05:40,414 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 11:05:40,415 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 11:05:40,417 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 11:05:40,418 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 11:05:40,419 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 11:05:40,420 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 11:05:40,420 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 11:05:40,421 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 11:05:40,422 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 11:05:40,423 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 11:05:40,424 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 11:05:40,425 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 11:05:40,427 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 11:05:40,429 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 11:05:40,430 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 11:05:40,431 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 11:05:40,433 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 11:05:40,435 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 11:05:40,435 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 11:05:40,435 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 11:05:40,436 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 11:05:40,437 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 11:05:40,438 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 11:05:40,439 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 11:05:40,440 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 11:05:40,440 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 11:05:40,441 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 11:05:40,441 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 11:05:40,441 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 11:05:40,442 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 11:05:40,443 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 11:05:40,443 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 11:05:40,461 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 11:05:40,461 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 11:05:40,462 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 11:05:40,462 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 11:05:40,462 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 11:05:40,463 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 11:05:40,463 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 11:05:40,463 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 11:05:40,463 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 11:05:40,463 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 11:05:40,463 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 11:05:40,466 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 11:05:40,467 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 11:05:40,467 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 11:05:40,468 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 11:05:40,468 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 11:05:40,468 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 11:05:40,468 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 11:05:40,468 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 11:05:40,468 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 11:05:40,470 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 11:05:40,470 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 11:05:40,470 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 11:05:40,471 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 11:05:40,471 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:05:40,471 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 11:05:40,471 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 11:05:40,471 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 11:05:40,472 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 11:05:40,472 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 11:05:40,472 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 11:05:40,472 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 11:05:40,472 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 11:05:40,472 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 11:05:40,538 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 11:05:40,552 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 11:05:40,557 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 11:05:40,558 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 11:05:40,558 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 11:05:40,560 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label41_false-unreach-call.c [2018-10-27 11:05:40,632 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7f18819b8/bda41bf6dee64505aa48714a55842dba/FLAG3f4bf4fb7 [2018-10-27 11:05:41,206 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 11:05:41,209 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label41_false-unreach-call.c [2018-10-27 11:05:41,231 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7f18819b8/bda41bf6dee64505aa48714a55842dba/FLAG3f4bf4fb7 [2018-10-27 11:05:41,250 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7f18819b8/bda41bf6dee64505aa48714a55842dba [2018-10-27 11:05:41,263 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 11:05:41,266 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 11:05:41,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 11:05:41,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 11:05:41,274 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 11:05:41,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:41,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d08a6c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41, skipping insertion in model container [2018-10-27 11:05:41,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:41,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 11:05:41,355 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 11:05:41,783 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:05:41,787 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 11:05:41,921 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:05:41,944 INFO L193 MainTranslator]: Completed translation [2018-10-27 11:05:41,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41 WrapperNode [2018-10-27 11:05:41,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 11:05:41,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 11:05:41,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 11:05:41,946 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 11:05:41,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:41,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:42,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 11:05:42,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 11:05:42,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 11:05:42,151 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 11:05:42,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:42,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:42,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:42,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:42,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:42,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:42,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (1/1) ... [2018-10-27 11:05:42,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 11:05:42,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 11:05:42,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 11:05:42,270 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 11:05:42,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:05:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 11:05:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 11:05:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 11:05:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 11:05:42,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 11:05:42,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 11:05:42,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 11:05:42,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 11:05:45,256 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 11:05:45,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:05:45 BoogieIcfgContainer [2018-10-27 11:05:45,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 11:05:45,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 11:05:45,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 11:05:45,262 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 11:05:45,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:05:41" (1/3) ... [2018-10-27 11:05:45,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a0ff01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:05:45, skipping insertion in model container [2018-10-27 11:05:45,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:05:41" (2/3) ... [2018-10-27 11:05:45,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a0ff01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:05:45, skipping insertion in model container [2018-10-27 11:05:45,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:05:45" (3/3) ... [2018-10-27 11:05:45,267 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label41_false-unreach-call.c [2018-10-27 11:05:45,275 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 11:05:45,284 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 11:05:45,301 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 11:05:45,337 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 11:05:45,337 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 11:05:45,337 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 11:05:45,338 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 11:05:45,338 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 11:05:45,338 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 11:05:45,338 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 11:05:45,339 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 11:05:45,365 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-10-27 11:05:45,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-27 11:05:45,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:05:45,373 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] [2018-10-27 11:05:45,376 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:05:45,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:05:45,382 INFO L82 PathProgramCache]: Analyzing trace with hash 531161921, now seen corresponding path program 1 times [2018-10-27 11:05:45,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:05:45,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:05:45,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:05:45,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:05:45,434 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:05:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:05:45,792 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:05:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:05:45,902 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:05:45,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 11:05:45,907 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:05:45,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 11:05:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 11:05:45,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 11:05:45,935 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2018-10-27 11:05:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:05:47,677 INFO L93 Difference]: Finished difference Result 574 states and 992 transitions. [2018-10-27 11:05:47,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 11:05:47,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2018-10-27 11:05:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:05:47,698 INFO L225 Difference]: With dead ends: 574 [2018-10-27 11:05:47,699 INFO L226 Difference]: Without dead ends: 356 [2018-10-27 11:05:47,706 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 11:05:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-10-27 11:05:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-10-27 11:05:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-10-27 11:05:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 609 transitions. [2018-10-27 11:05:47,778 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 609 transitions. Word has length 27 [2018-10-27 11:05:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:05:47,779 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 609 transitions. [2018-10-27 11:05:47,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 11:05:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 609 transitions. [2018-10-27 11:05:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-27 11:05:47,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:05:47,785 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:05:47,786 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:05:47,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:05:47,786 INFO L82 PathProgramCache]: Analyzing trace with hash 130424032, now seen corresponding path program 1 times [2018-10-27 11:05:47,787 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:05:47,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:05:47,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:05:47,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:05:47,789 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:05:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:05:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:05:48,129 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:05:48,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:05:48,129 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:05:48,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:05:48,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:05:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:05:48,133 INFO L87 Difference]: Start difference. First operand 356 states and 609 transitions. Second operand 6 states. [2018-10-27 11:05:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:05:49,780 INFO L93 Difference]: Finished difference Result 867 states and 1507 transitions. [2018-10-27 11:05:49,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:05:49,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2018-10-27 11:05:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:05:49,788 INFO L225 Difference]: With dead ends: 867 [2018-10-27 11:05:49,788 INFO L226 Difference]: Without dead ends: 517 [2018-10-27 11:05:49,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:05:49,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2018-10-27 11:05:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 508. [2018-10-27 11:05:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-10-27 11:05:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 831 transitions. [2018-10-27 11:05:49,828 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 831 transitions. Word has length 101 [2018-10-27 11:05:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:05:49,829 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 831 transitions. [2018-10-27 11:05:49,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:05:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 831 transitions. [2018-10-27 11:05:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-27 11:05:49,834 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:05:49,834 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:05:49,835 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:05:49,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:05:49,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1594427148, now seen corresponding path program 1 times [2018-10-27 11:05:49,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:05:49,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:05:49,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:05:49,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:05:49,837 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:05:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:05:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:05:50,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:05:50,096 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:05:50,097 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 108 with the following transitions: [2018-10-27 11:05:50,099 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [117], [119], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-27 11:05:50,139 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:05:50,139 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:05:50,779 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:05:51,742 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 11:05:51,745 INFO L272 AbstractInterpreter]: Visited 88 different actions 497 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 11:05:51,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:05:51,779 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 11:05:51,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:05:51,780 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 11:05:51,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:05:51,794 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 11:05:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:05:51,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 11:05:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:05:52,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 11:05:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:05:52,398 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 11:05:52,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-27 11:05:52,398 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:05:52,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 11:05:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 11:05:52,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 11:05:52,400 INFO L87 Difference]: Start difference. First operand 508 states and 831 transitions. Second operand 3 states. [2018-10-27 11:05:53,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:05:53,924 INFO L93 Difference]: Finished difference Result 1448 states and 2464 transitions. [2018-10-27 11:05:53,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 11:05:53,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2018-10-27 11:05:53,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:05:53,937 INFO L225 Difference]: With dead ends: 1448 [2018-10-27 11:05:53,937 INFO L226 Difference]: Without dead ends: 946 [2018-10-27 11:05:53,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 213 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 11:05:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2018-10-27 11:05:53,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 946. [2018-10-27 11:05:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 946 states. [2018-10-27 11:05:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1566 transitions. [2018-10-27 11:05:53,990 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1566 transitions. Word has length 107 [2018-10-27 11:05:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:05:53,991 INFO L481 AbstractCegarLoop]: Abstraction has 946 states and 1566 transitions. [2018-10-27 11:05:53,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 11:05:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1566 transitions. [2018-10-27 11:05:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-27 11:05:53,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:05:54,000 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:05:54,000 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:05:54,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:05:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1936086969, now seen corresponding path program 1 times [2018-10-27 11:05:54,001 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:05:54,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:05:54,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:05:54,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:05:54,002 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:05:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:05:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:05:54,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:05:54,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:05:54,296 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:05:54,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:05:54,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:05:54,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:05:54,298 INFO L87 Difference]: Start difference. First operand 946 states and 1566 transitions. Second operand 6 states. [2018-10-27 11:05:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:05:57,824 INFO L93 Difference]: Finished difference Result 2484 states and 4235 transitions. [2018-10-27 11:05:57,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:05:57,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2018-10-27 11:05:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:05:57,838 INFO L225 Difference]: With dead ends: 2484 [2018-10-27 11:05:57,838 INFO L226 Difference]: Without dead ends: 1544 [2018-10-27 11:05:57,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:05:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2018-10-27 11:05:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1515. [2018-10-27 11:05:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1515 states. [2018-10-27 11:05:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 2291 transitions. [2018-10-27 11:05:57,909 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 2291 transitions. Word has length 140 [2018-10-27 11:05:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:05:57,910 INFO L481 AbstractCegarLoop]: Abstraction has 1515 states and 2291 transitions. [2018-10-27 11:05:57,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:05:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 2291 transitions. [2018-10-27 11:05:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-27 11:05:57,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:05:57,915 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:05:57,918 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:05:57,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:05:57,918 INFO L82 PathProgramCache]: Analyzing trace with hash 625958776, now seen corresponding path program 1 times [2018-10-27 11:05:57,918 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:05:57,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:05:57,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:05:57,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:05:57,922 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:05:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:05:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:05:58,452 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:05:58,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 11:05:58,453 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:05:58,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 11:05:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 11:05:58,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 11:05:58,454 INFO L87 Difference]: Start difference. First operand 1515 states and 2291 transitions. Second operand 5 states. [2018-10-27 11:05:58,669 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-10-27 11:06:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:06:01,613 INFO L93 Difference]: Finished difference Result 4153 states and 6381 transitions. [2018-10-27 11:06:01,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:06:01,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2018-10-27 11:06:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:06:01,629 INFO L225 Difference]: With dead ends: 4153 [2018-10-27 11:06:01,629 INFO L226 Difference]: Without dead ends: 2644 [2018-10-27 11:06:01,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-27 11:06:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2018-10-27 11:06:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2402. [2018-10-27 11:06:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2402 states. [2018-10-27 11:06:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 3561 transitions. [2018-10-27 11:06:01,714 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 3561 transitions. Word has length 145 [2018-10-27 11:06:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:06:01,714 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 3561 transitions. [2018-10-27 11:06:01,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 11:06:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 3561 transitions. [2018-10-27 11:06:01,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-27 11:06:01,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:06:01,724 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:06:01,724 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:06:01,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:06:01,725 INFO L82 PathProgramCache]: Analyzing trace with hash 601760117, now seen corresponding path program 1 times [2018-10-27 11:06:01,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:06:01,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:06:01,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:06:01,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:06:01,726 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:06:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:06:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-10-27 11:06:02,023 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:06:02,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 11:06:02,023 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:06:02,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 11:06:02,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 11:06:02,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 11:06:02,025 INFO L87 Difference]: Start difference. First operand 2402 states and 3561 transitions. Second operand 3 states. [2018-10-27 11:06:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:06:03,688 INFO L93 Difference]: Finished difference Result 6226 states and 9670 transitions. [2018-10-27 11:06:03,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 11:06:03,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2018-10-27 11:06:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:06:03,713 INFO L225 Difference]: With dead ends: 6226 [2018-10-27 11:06:03,714 INFO L226 Difference]: Without dead ends: 4126 [2018-10-27 11:06:03,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 11:06:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2018-10-27 11:06:03,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3648. [2018-10-27 11:06:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3648 states. [2018-10-27 11:06:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5206 transitions. [2018-10-27 11:06:03,852 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5206 transitions. Word has length 211 [2018-10-27 11:06:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:06:03,853 INFO L481 AbstractCegarLoop]: Abstraction has 3648 states and 5206 transitions. [2018-10-27 11:06:03,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 11:06:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5206 transitions. [2018-10-27 11:06:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-27 11:06:03,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:06:03,866 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:06:03,866 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:06:03,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:06:03,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1097691914, now seen corresponding path program 1 times [2018-10-27 11:06:03,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:06:03,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:06:03,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:06:03,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:06:03,868 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:06:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:06:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:06:04,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:06:04,710 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:06:04,710 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 217 with the following transitions: [2018-10-27 11:06:04,711 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [117], [119], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [686], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-27 11:06:04,718 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:06:04,718 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:06:04,856 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:06:05,451 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 11:06:05,451 INFO L272 AbstractInterpreter]: Visited 126 different actions 365 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 11:06:05,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:06:05,490 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 11:06:06,154 INFO L227 lantSequenceWeakener]: Weakened 48 states. On average, predicates are now at 74.38% of their original sizes. [2018-10-27 11:06:06,154 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 11:06:07,147 INFO L415 sIntCurrentIteration]: We unified 215 AI predicates to 215 [2018-10-27 11:06:07,147 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 11:06:07,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 11:06:07,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [13] total 32 [2018-10-27 11:06:07,149 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:06:07,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-27 11:06:07,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-27 11:06:07,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2018-10-27 11:06:07,150 INFO L87 Difference]: Start difference. First operand 3648 states and 5206 transitions. Second operand 21 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown