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/Problem14_label18_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 11:30:57,229 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 11:30:57,231 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 11:30:57,253 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 11:30:57,253 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 11:30:57,255 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 11:30:57,256 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 11:30:57,258 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 11:30:57,261 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 11:30:57,262 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 11:30:57,264 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 11:30:57,265 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 11:30:57,266 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 11:30:57,266 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 11:30:57,276 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 11:30:57,277 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 11:30:57,279 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 11:30:57,283 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 11:30:57,287 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 11:30:57,289 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 11:30:57,291 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 11:30:57,293 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 11:30:57,297 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 11:30:57,297 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 11:30:57,297 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 11:30:57,298 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 11:30:57,299 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 11:30:57,302 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 11:30:57,305 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 11:30:57,307 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 11:30:57,307 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 11:30:57,309 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 11:30:57,310 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 11:30:57,310 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 11:30:57,312 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 11:30:57,313 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 11:30:57,313 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 11:30:57,341 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 11:30:57,342 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 11:30:57,343 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 11:30:57,343 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 11:30:57,344 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 11:30:57,344 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 11:30:57,344 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 11:30:57,344 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 11:30:57,344 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 11:30:57,345 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 11:30:57,345 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 11:30:57,345 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 11:30:57,346 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 11:30:57,346 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 11:30:57,347 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 11:30:57,347 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 11:30:57,348 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 11:30:57,348 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 11:30:57,348 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 11:30:57,348 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 11:30:57,349 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 11:30:57,350 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 11:30:57,350 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 11:30:57,350 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 11:30:57,350 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:30:57,351 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 11:30:57,351 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 11:30:57,351 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 11:30:57,351 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 11:30:57,351 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 11:30:57,352 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 11:30:57,352 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 11:30:57,352 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 11:30:57,352 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 11:30:57,428 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 11:30:57,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 11:30:57,450 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 11:30:57,452 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 11:30:57,452 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 11:30:57,453 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label18_false-unreach-call_false-termination.c [2018-10-27 11:30:57,519 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4f1364058/5dd175ee4c284604b3e5ad8527e9777c/FLAGf5992fd2a [2018-10-27 11:30:58,141 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 11:30:58,142 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label18_false-unreach-call_false-termination.c [2018-10-27 11:30:58,156 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4f1364058/5dd175ee4c284604b3e5ad8527e9777c/FLAGf5992fd2a [2018-10-27 11:30:58,176 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4f1364058/5dd175ee4c284604b3e5ad8527e9777c [2018-10-27 11:30:58,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 11:30:58,192 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 11:30:58,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 11:30:58,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 11:30:58,198 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 11:30:58,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:58,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@422e573f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58, skipping insertion in model container [2018-10-27 11:30:58,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:58,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 11:30:58,286 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 11:30:58,813 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:30:58,819 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 11:30:58,978 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:30:58,998 INFO L193 MainTranslator]: Completed translation [2018-10-27 11:30:58,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58 WrapperNode [2018-10-27 11:30:58,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 11:30:58,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 11:30:59,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 11:30:59,000 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 11:30:59,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:59,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:59,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 11:30:59,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 11:30:59,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 11:30:59,231 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 11:30:59,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:59,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:59,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:59,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:59,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:59,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:59,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (1/1) ... [2018-10-27 11:30:59,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 11:30:59,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 11:30:59,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 11:30:59,333 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 11:30:59,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (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 11:30:59,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 11:30:59,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 11:30:59,404 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 11:30:59,404 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 11:30:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 11:30:59,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 11:30:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 11:30:59,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 11:31:02,788 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 11:31:02,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:31:02 BoogieIcfgContainer [2018-10-27 11:31:02,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 11:31:02,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 11:31:02,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 11:31:02,794 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 11:31:02,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:30:58" (1/3) ... [2018-10-27 11:31:02,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d84a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:31:02, skipping insertion in model container [2018-10-27 11:31:02,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:30:58" (2/3) ... [2018-10-27 11:31:02,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d84a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:31:02, skipping insertion in model container [2018-10-27 11:31:02,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:31:02" (3/3) ... [2018-10-27 11:31:02,798 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label18_false-unreach-call_false-termination.c [2018-10-27 11:31:02,809 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 11:31:02,819 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 11:31:02,837 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 11:31:02,881 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 11:31:02,881 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 11:31:02,881 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 11:31:02,882 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 11:31:02,882 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 11:31:02,882 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 11:31:02,882 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 11:31:02,882 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 11:31:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 11:31:02,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-27 11:31:02,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:02,926 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 11:31:02,929 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:02,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1102651839, now seen corresponding path program 1 times [2018-10-27 11:31:02,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:02,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:02,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:02,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:02,996 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:31:03,369 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:31:03,382 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 11:31:03,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:31:03,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 11:31:03,386 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:31:03,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 11:31:03,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 11:31:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 11:31:03,408 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-27 11:31:05,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:31:05,149 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-10-27 11:31:05,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 11:31:05,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2018-10-27 11:31:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:31:05,170 INFO L225 Difference]: With dead ends: 691 [2018-10-27 11:31:05,170 INFO L226 Difference]: Without dead ends: 434 [2018-10-27 11:31:05,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 11:31:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-27 11:31:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-10-27 11:31:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-27 11:31:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-10-27 11:31:05,266 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 27 [2018-10-27 11:31:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:31:05,266 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-10-27 11:31:05,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 11:31:05,267 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-10-27 11:31:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-27 11:31:05,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:05,274 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] [2018-10-27 11:31:05,274 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:05,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:05,275 INFO L82 PathProgramCache]: Analyzing trace with hash 122089084, now seen corresponding path program 1 times [2018-10-27 11:31:05,275 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:05,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:05,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:05,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:05,278 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:31:05,590 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 11:31:05,590 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:31:05,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:31:05,591 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:31:05,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:31:05,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:31:05,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:31:05,595 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-10-27 11:31:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:31:09,508 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-10-27 11:31:09,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:31:09,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2018-10-27 11:31:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:31:09,520 INFO L225 Difference]: With dead ends: 1588 [2018-10-27 11:31:09,521 INFO L226 Difference]: Without dead ends: 1160 [2018-10-27 11:31:09,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:31:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-10-27 11:31:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-10-27 11:31:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-10-27 11:31:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-10-27 11:31:09,606 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 97 [2018-10-27 11:31:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:31:09,607 INFO L481 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-10-27 11:31:09,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:31:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-10-27 11:31:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-27 11:31:09,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:09,612 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] [2018-10-27 11:31:09,612 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:09,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1764602551, now seen corresponding path program 1 times [2018-10-27 11:31:09,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:09,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:09,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:09,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:09,615 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:31:09,885 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 11:31:09,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:31:09,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 11:31:09,886 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:31:09,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 11:31:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 11:31:09,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 11:31:09,887 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-10-27 11:31:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:31:12,411 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-10-27 11:31:12,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:31:12,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2018-10-27 11:31:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:31:12,432 INFO L225 Difference]: With dead ends: 2716 [2018-10-27 11:31:12,432 INFO L226 Difference]: Without dead ends: 1569 [2018-10-27 11:31:12,440 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 11:31:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-10-27 11:31:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-10-27 11:31:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-10-27 11:31:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-10-27 11:31:12,510 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 98 [2018-10-27 11:31:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:31:12,511 INFO L481 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-10-27 11:31:12,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 11:31:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-10-27 11:31:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-27 11:31:12,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:12,514 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] [2018-10-27 11:31:12,514 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:12,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:12,515 INFO L82 PathProgramCache]: Analyzing trace with hash -263336997, now seen corresponding path program 1 times [2018-10-27 11:31:12,518 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:12,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:12,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:12,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:12,520 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:31:12,700 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 11:31:12,701 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:31:12,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 11:31:12,701 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:31:12,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 11:31:12,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 11:31:12,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 11:31:12,702 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-10-27 11:31:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:31:15,307 INFO L93 Difference]: Finished difference Result 4905 states and 7502 transitions. [2018-10-27 11:31:15,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 11:31:15,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2018-10-27 11:31:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:31:15,330 INFO L225 Difference]: With dead ends: 4905 [2018-10-27 11:31:15,330 INFO L226 Difference]: Without dead ends: 3373 [2018-10-27 11:31:15,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 11:31:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2018-10-27 11:31:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 3262. [2018-10-27 11:31:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3262 states. [2018-10-27 11:31:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 4435 transitions. [2018-10-27 11:31:15,442 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 4435 transitions. Word has length 100 [2018-10-27 11:31:15,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:31:15,443 INFO L481 AbstractCegarLoop]: Abstraction has 3262 states and 4435 transitions. [2018-10-27 11:31:15,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 11:31:15,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 4435 transitions. [2018-10-27 11:31:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-27 11:31:15,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:15,449 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:31:15,450 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:15,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:15,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1806492795, now seen corresponding path program 1 times [2018-10-27 11:31:15,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:15,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:15,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:15,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:15,452 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:31:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-10-27 11:31:15,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:31:15,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 11:31:15,605 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:31:15,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 11:31:15,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 11:31:15,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:31:15,606 INFO L87 Difference]: Start difference. First operand 3262 states and 4435 transitions. Second operand 4 states. [2018-10-27 11:31:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:31:17,978 INFO L93 Difference]: Finished difference Result 8791 states and 12460 transitions. [2018-10-27 11:31:17,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 11:31:17,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 185 [2018-10-27 11:31:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:31:18,010 INFO L225 Difference]: With dead ends: 8791 [2018-10-27 11:31:18,010 INFO L226 Difference]: Without dead ends: 5535 [2018-10-27 11:31:18,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:31:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2018-10-27 11:31:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 5535. [2018-10-27 11:31:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5535 states. [2018-10-27 11:31:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5535 states to 5535 states and 7487 transitions. [2018-10-27 11:31:18,175 INFO L78 Accepts]: Start accepts. Automaton has 5535 states and 7487 transitions. Word has length 185 [2018-10-27 11:31:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:31:18,175 INFO L481 AbstractCegarLoop]: Abstraction has 5535 states and 7487 transitions. [2018-10-27 11:31:18,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 11:31:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 5535 states and 7487 transitions. [2018-10-27 11:31:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-10-27 11:31:18,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:18,192 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 11:31:18,192 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:18,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash -459245327, now seen corresponding path program 1 times [2018-10-27 11:31:18,193 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:18,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:18,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:18,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:18,194 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:31:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-10-27 11:31:18,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:31:18,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 11:31:18,403 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:31:18,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 11:31:18,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 11:31:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 11:31:18,405 INFO L87 Difference]: Start difference. First operand 5535 states and 7487 transitions. Second operand 3 states. [2018-10-27 11:31:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:31:19,934 INFO L93 Difference]: Finished difference Result 13571 states and 18960 transitions. [2018-10-27 11:31:19,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 11:31:19,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 245 [2018-10-27 11:31:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:31:19,985 INFO L225 Difference]: With dead ends: 13571 [2018-10-27 11:31:19,985 INFO L226 Difference]: Without dead ends: 8042 [2018-10-27 11:31:20,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 11:31:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8042 states. [2018-10-27 11:31:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8042 to 8040. [2018-10-27 11:31:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8040 states. [2018-10-27 11:31:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8040 states to 8040 states and 11044 transitions. [2018-10-27 11:31:20,241 INFO L78 Accepts]: Start accepts. Automaton has 8040 states and 11044 transitions. Word has length 245 [2018-10-27 11:31:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:31:20,242 INFO L481 AbstractCegarLoop]: Abstraction has 8040 states and 11044 transitions. [2018-10-27 11:31:20,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 11:31:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 8040 states and 11044 transitions. [2018-10-27 11:31:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-27 11:31:20,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:31:20,295 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 11:31:20,295 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:31:20,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:20,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1610952686, now seen corresponding path program 1 times [2018-10-27 11:31:20,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:31:20,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:20,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:31:20,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:31:20,301 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:31:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:31:20,787 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-10-27 11:31:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 40 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 11:31:20,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:31:20,968 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:31:20,969 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 311 with the following transitions: [2018-10-27 11:31:20,971 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], [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], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [894], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 11:31:21,028 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:31:21,029 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:31:22,048 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:31:43,083 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 11:31:43,084 INFO L272 AbstractInterpreter]: Visited 175 different actions 175 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 11:31:43,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:31:43,096 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 11:32:01,678 INFO L227 lantSequenceWeakener]: Weakened 301 states. On average, predicates are now at 77.4% of their original sizes. [2018-10-27 11:32:01,679 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 11:32:01,917 INFO L415 sIntCurrentIteration]: We unified 309 AI predicates to 309 [2018-10-27 11:32:01,917 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 11:32:01,918 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 11:32:01,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2018-10-27 11:32:01,918 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:32:01,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 11:32:01,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 11:32:01,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 11:32:01,921 INFO L87 Difference]: Start difference. First operand 8040 states and 11044 transitions. Second operand 8 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown