java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label39_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:23:39,214 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:23:39,217 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:23:39,233 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:23:39,234 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:23:39,235 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:23:39,236 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:23:39,238 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:23:39,239 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:23:39,240 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:23:39,241 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:23:39,241 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:23:39,242 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:23:39,243 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:23:39,244 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:23:39,245 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:23:39,246 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:23:39,248 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:23:39,250 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:23:39,251 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:23:39,252 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:23:39,253 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:23:39,256 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 08:23:39,256 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 08:23:39,256 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 08:23:39,257 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 08:23:39,258 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 08:23:39,259 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 08:23:39,260 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 08:23:39,261 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 08:23:39,261 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 08:23:39,262 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 08:23:39,262 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 08:23:39,262 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 08:23:39,263 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 08:23:39,264 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 08:23:39,264 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:23:39,280 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:23:39,280 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:23:39,281 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:23:39,281 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:23:39,282 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:23:39,282 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:23:39,282 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:23:39,282 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:23:39,282 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:23:39,283 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:23:39,283 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:23:39,283 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:23:39,283 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:23:39,283 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:23:39,284 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:23:39,284 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:23:39,284 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:23:39,284 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:23:39,285 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:23:39,285 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:23:39,285 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:23:39,285 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:23:39,285 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:23:39,286 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:23:39,286 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:23:39,286 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:23:39,286 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:23:39,286 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:23:39,287 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:23:39,287 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:23:39,287 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:23:39,287 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:23:39,287 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:23:39,287 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:23:39,288 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:23:39,288 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:23:39,332 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:23:39,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:23:39,349 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:23:39,351 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:23:39,351 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:23:39,352 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label39_true-unreach-call.c [2018-10-27 08:23:39,407 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f429626d1/c0c9d9f265d0469faeeca02eaea4c398/FLAG90176620f [2018-10-27 08:23:40,074 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:23:40,079 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label39_true-unreach-call.c [2018-10-27 08:23:40,097 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f429626d1/c0c9d9f265d0469faeeca02eaea4c398/FLAG90176620f [2018-10-27 08:23:40,113 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f429626d1/c0c9d9f265d0469faeeca02eaea4c398 [2018-10-27 08:23:40,126 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:23:40,129 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:23:40,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:23:40,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:23:40,137 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:23:40,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:23:40" (1/1) ... [2018-10-27 08:23:40,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d905f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:40, skipping insertion in model container [2018-10-27 08:23:40,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:23:40" (1/1) ... [2018-10-27 08:23:40,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:23:40,242 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:23:40,962 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:23:40,968 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:23:41,225 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:23:41,246 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:23:41,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41 WrapperNode [2018-10-27 08:23:41,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:23:41,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:23:41,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:23:41,249 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:23:41,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (1/1) ... [2018-10-27 08:23:41,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (1/1) ... [2018-10-27 08:23:41,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:23:41,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:23:41,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:23:41,605 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:23:41,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (1/1) ... [2018-10-27 08:23:41,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (1/1) ... [2018-10-27 08:23:41,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (1/1) ... [2018-10-27 08:23:41,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (1/1) ... [2018-10-27 08:23:41,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (1/1) ... [2018-10-27 08:23:41,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (1/1) ... [2018-10-27 08:23:41,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (1/1) ... [2018-10-27 08:23:41,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:23:41,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:23:41,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:23:41,808 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:23:41,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (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 08:23:41,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:23:41,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:23:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 08:23:41,880 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 08:23:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:23:41,881 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:23:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:23:41,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:23:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:23:41,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:23:48,466 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:23:48,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:23:48 BoogieIcfgContainer [2018-10-27 08:23:48,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:23:48,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:23:48,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:23:48,473 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:23:48,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:23:40" (1/3) ... [2018-10-27 08:23:48,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14256c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:23:48, skipping insertion in model container [2018-10-27 08:23:48,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:23:41" (2/3) ... [2018-10-27 08:23:48,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14256c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:23:48, skipping insertion in model container [2018-10-27 08:23:48,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:23:48" (3/3) ... [2018-10-27 08:23:48,477 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label39_true-unreach-call.c [2018-10-27 08:23:48,487 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:23:48,496 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:23:48,514 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:23:48,558 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:23:48,558 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:23:48,559 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:23:48,559 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:23:48,559 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:23:48,559 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:23:48,559 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:23:48,560 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:23:48,595 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-10-27 08:23:48,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-27 08:23:48,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:23:48,607 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:23:48,610 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:23:48,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:23:48,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1251899380, now seen corresponding path program 1 times [2018-10-27 08:23:48,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:23:48,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:23:48,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:23:48,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:23:48,663 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:23:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:23:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:23:49,149 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:23:49,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:23:49,149 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:23:49,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:23:49,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:23:49,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:23:49,175 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-10-27 08:23:56,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:23:56,133 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-10-27 08:23:56,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:23:56,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-10-27 08:23:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:23:56,174 INFO L225 Difference]: With dead ends: 1513 [2018-10-27 08:23:56,175 INFO L226 Difference]: Without dead ends: 1097 [2018-10-27 08:23:56,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:23:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-10-27 08:23:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 744. [2018-10-27 08:23:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-10-27 08:23:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1357 transitions. [2018-10-27 08:23:56,355 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1357 transitions. Word has length 56 [2018-10-27 08:23:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:23:56,355 INFO L481 AbstractCegarLoop]: Abstraction has 744 states and 1357 transitions. [2018-10-27 08:23:56,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:23:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1357 transitions. [2018-10-27 08:23:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-27 08:23:56,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:23:56,364 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:23:56,364 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:23:56,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:23:56,365 INFO L82 PathProgramCache]: Analyzing trace with hash -594797350, now seen corresponding path program 1 times [2018-10-27 08:23:56,365 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:23:56,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:23:56,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:23:56,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:23:56,367 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:23:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:23:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:23:56,738 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:23:56,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 08:23:56,738 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:23:56,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 08:23:56,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 08:23:56,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 08:23:56,741 INFO L87 Difference]: Start difference. First operand 744 states and 1357 transitions. Second operand 5 states. [2018-10-27 08:24:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:24:05,143 INFO L93 Difference]: Finished difference Result 2196 states and 4092 transitions. [2018-10-27 08:24:05,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:24:05,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2018-10-27 08:24:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:24:05,172 INFO L225 Difference]: With dead ends: 2196 [2018-10-27 08:24:05,172 INFO L226 Difference]: Without dead ends: 1458 [2018-10-27 08:24:05,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:24:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2018-10-27 08:24:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1438. [2018-10-27 08:24:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2018-10-27 08:24:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2551 transitions. [2018-10-27 08:24:05,267 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2551 transitions. Word has length 126 [2018-10-27 08:24:05,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:24:05,267 INFO L481 AbstractCegarLoop]: Abstraction has 1438 states and 2551 transitions. [2018-10-27 08:24:05,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 08:24:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2551 transitions. [2018-10-27 08:24:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-27 08:24:05,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:24:05,272 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:24:05,272 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:24:05,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:24:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1843387759, now seen corresponding path program 1 times [2018-10-27 08:24:05,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:24:05,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:24:05,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:24:05,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:24:05,274 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:24:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:24:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:24:05,553 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:24:05,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:24:05,554 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:24:05,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:24:05,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:24:05,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:24:05,555 INFO L87 Difference]: Start difference. First operand 1438 states and 2551 transitions. Second operand 6 states. [2018-10-27 08:24:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:24:10,561 INFO L93 Difference]: Finished difference Result 4237 states and 7540 transitions. [2018-10-27 08:24:10,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:24:10,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2018-10-27 08:24:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:24:10,582 INFO L225 Difference]: With dead ends: 4237 [2018-10-27 08:24:10,582 INFO L226 Difference]: Without dead ends: 2805 [2018-10-27 08:24:10,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:24:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2018-10-27 08:24:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2785. [2018-10-27 08:24:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2785 states. [2018-10-27 08:24:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4352 transitions. [2018-10-27 08:24:10,682 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4352 transitions. Word has length 129 [2018-10-27 08:24:10,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:24:10,682 INFO L481 AbstractCegarLoop]: Abstraction has 2785 states and 4352 transitions. [2018-10-27 08:24:10,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:24:10,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4352 transitions. [2018-10-27 08:24:10,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-27 08:24:10,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:24:10,689 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:24:10,689 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:24:10,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:24:10,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1559994924, now seen corresponding path program 1 times [2018-10-27 08:24:10,690 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:24:10,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:24:10,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:24:10,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:24:10,691 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:24:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:24:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 98 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 08:24:11,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:24:11,068 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:24:11,069 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 223 with the following transitions: [2018-10-27 08:24:11,071 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [684], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [764], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:24:11,122 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:24:11,122 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:24:11,686 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:24:11,688 INFO L272 AbstractInterpreter]: Visited 98 different actions 98 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 08:24:11,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:24:11,717 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:24:12,322 INFO L227 lantSequenceWeakener]: Weakened 213 states. On average, predicates are now at 78.12% of their original sizes. [2018-10-27 08:24:12,322 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:24:12,581 INFO L415 sIntCurrentIteration]: We unified 221 AI predicates to 221 [2018-10-27 08:24:12,581 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:24:12,582 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:24:12,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-10-27 08:24:12,583 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:24:12,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:24:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:24:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:24:12,584 INFO L87 Difference]: Start difference. First operand 2785 states and 4352 transitions. Second operand 6 states. [2018-10-27 08:25:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:25:47,851 INFO L93 Difference]: Finished difference Result 5904 states and 9231 transitions. [2018-10-27 08:25:47,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 08:25:47,852 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 222 [2018-10-27 08:25:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:25:47,870 INFO L225 Difference]: With dead ends: 5904 [2018-10-27 08:25:47,871 INFO L226 Difference]: Without dead ends: 3125 [2018-10-27 08:25:47,881 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 222 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:25:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2018-10-27 08:25:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3123. [2018-10-27 08:25:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3123 states. [2018-10-27 08:25:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 4698 transitions. [2018-10-27 08:25:47,966 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 4698 transitions. Word has length 222 [2018-10-27 08:25:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:25:47,967 INFO L481 AbstractCegarLoop]: Abstraction has 3123 states and 4698 transitions. [2018-10-27 08:25:47,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:25:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 4698 transitions. [2018-10-27 08:25:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-10-27 08:25:47,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:25:47,976 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:25:47,976 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:25:47,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:25:47,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1909742357, now seen corresponding path program 1 times [2018-10-27 08:25:47,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:25:47,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:25:47,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:25:47,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:25:47,980 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:25:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:25:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 99 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-27 08:25:48,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:25:48,338 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:25:48,338 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 266 with the following transitions: [2018-10-27 08:25:48,339 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [860], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:25:48,345 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:25:48,345 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:25:48,572 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:25:48,572 INFO L272 AbstractInterpreter]: Visited 126 different actions 364 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 08:25:48,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:25:48,590 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:25:48,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:25:48,590 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:25:48,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:25:48,602 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:25:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:25:48,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:25:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:25:49,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:25:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:25:49,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:25:49,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 08:25:49,383 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:25:49,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:25:49,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:25:49,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:25:49,386 INFO L87 Difference]: Start difference. First operand 3123 states and 4698 transitions. Second operand 9 states. [2018-10-27 08:25:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:25:59,085 INFO L93 Difference]: Finished difference Result 12616 states and 20235 transitions. [2018-10-27 08:25:59,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-27 08:25:59,089 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 265 [2018-10-27 08:25:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:25:59,155 INFO L225 Difference]: With dead ends: 12616 [2018-10-27 08:25:59,155 INFO L226 Difference]: Without dead ends: 9837 [2018-10-27 08:25:59,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 535 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2018-10-27 08:25:59,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9837 states. [2018-10-27 08:25:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9837 to 9314. [2018-10-27 08:25:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9314 states. [2018-10-27 08:25:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9314 states to 9314 states and 11904 transitions. [2018-10-27 08:25:59,479 INFO L78 Accepts]: Start accepts. Automaton has 9314 states and 11904 transitions. Word has length 265 [2018-10-27 08:25:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:25:59,480 INFO L481 AbstractCegarLoop]: Abstraction has 9314 states and 11904 transitions. [2018-10-27 08:25:59,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:25:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9314 states and 11904 transitions. [2018-10-27 08:25:59,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2018-10-27 08:25:59,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:25:59,521 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:25:59,522 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:25:59,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:25:59,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1333575078, now seen corresponding path program 1 times [2018-10-27 08:25:59,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:25:59,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:25:59,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:25:59,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:25:59,524 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:25:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:25:59,897 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-27 08:26:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 327 proven. 388 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-27 08:26:00,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:26:00,339 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:26:00,340 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 613 with the following transitions: [2018-10-27 08:26:00,340 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [856], [857], [860], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:26:00,345 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:26:00,345 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:26:01,174 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:26:01,174 INFO L272 AbstractInterpreter]: Visited 142 different actions 701 times. Merged at 8 different actions 36 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 5 different actions. Largest state had 24 variables. [2018-10-27 08:26:01,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:26:01,212 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:26:01,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:26:01,212 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-27 08:26:01,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:26:01,228 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:26:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:26:01,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:26:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 764 proven. 2 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2018-10-27 08:26:01,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:26:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 350 proven. 296 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2018-10-27 08:26:02,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:26:02,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2018-10-27 08:26:02,532 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:26:02,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 08:26:02,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 08:26:02,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-10-27 08:26:02,536 INFO L87 Difference]: Start difference. First operand 9314 states and 11904 transitions. Second operand 10 states. [2018-10-27 08:26:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:26:10,391 INFO L93 Difference]: Finished difference Result 23771 states and 30622 transitions. [2018-10-27 08:26:10,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-27 08:26:10,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 612 [2018-10-27 08:26:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:26:10,448 INFO L225 Difference]: With dead ends: 23771 [2018-10-27 08:26:10,448 INFO L226 Difference]: Without dead ends: 11609 [2018-10-27 08:26:10,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1257 GetRequests, 1232 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-10-27 08:26:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11609 states. [2018-10-27 08:26:10,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11609 to 11524. [2018-10-27 08:26:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11524 states. [2018-10-27 08:26:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11524 states to 11524 states and 12592 transitions. [2018-10-27 08:26:10,803 INFO L78 Accepts]: Start accepts. Automaton has 11524 states and 12592 transitions. Word has length 612 [2018-10-27 08:26:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:26:10,804 INFO L481 AbstractCegarLoop]: Abstraction has 11524 states and 12592 transitions. [2018-10-27 08:26:10,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 08:26:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 11524 states and 12592 transitions. [2018-10-27 08:26:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2018-10-27 08:26:10,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:26:10,877 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:26:10,877 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:26:10,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:26:10,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1100934256, now seen corresponding path program 1 times [2018-10-27 08:26:10,878 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:26:10,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:26:10,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:26:10,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:26:10,879 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:26:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:26:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 557 proven. 293 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2018-10-27 08:26:12,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:26:12,532 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:26:12,534 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 943 with the following transitions: [2018-10-27 08:26:12,535 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [684], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1256], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:26:12,547 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:26:12,548 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:26:13,702 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:26:13,703 INFO L272 AbstractInterpreter]: Visited 253 different actions 1007 times. Merged at 10 different actions 30 times. Never widened. Found 9 fixpoints after 6 different actions. Largest state had 24 variables. [2018-10-27 08:26:13,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:26:13,712 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:26:13,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:26:13,712 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 08:26:13,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:26:13,721 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:26:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:26:13,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:26:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 1391 proven. 2 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2018-10-27 08:26:14,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:26:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 557 proven. 293 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2018-10-27 08:26:15,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:26:15,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 08:26:15,088 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:26:15,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:26:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:26:15,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:26:15,090 INFO L87 Difference]: Start difference. First operand 11524 states and 12592 transitions. Second operand 9 states. [2018-10-27 08:26:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:26:19,922 INFO L93 Difference]: Finished difference Result 32471 states and 37186 transitions. [2018-10-27 08:26:19,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 08:26:19,923 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 942 [2018-10-27 08:26:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:26:20,019 INFO L225 Difference]: With dead ends: 32471 [2018-10-27 08:26:20,019 INFO L226 Difference]: Without dead ends: 19343 [2018-10-27 08:26:20,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1905 GetRequests, 1887 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2018-10-27 08:26:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19343 states. [2018-10-27 08:26:20,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19343 to 18525. [2018-10-27 08:26:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18525 states. [2018-10-27 08:26:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18525 states to 18525 states and 20448 transitions. [2018-10-27 08:26:20,895 INFO L78 Accepts]: Start accepts. Automaton has 18525 states and 20448 transitions. Word has length 942 [2018-10-27 08:26:20,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:26:20,897 INFO L481 AbstractCegarLoop]: Abstraction has 18525 states and 20448 transitions. [2018-10-27 08:26:20,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:26:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 18525 states and 20448 transitions. [2018-10-27 08:26:21,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1305 [2018-10-27 08:26:21,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:26:21,071 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:26:21,071 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:26:21,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:26:21,072 INFO L82 PathProgramCache]: Analyzing trace with hash 428702176, now seen corresponding path program 1 times [2018-10-27 08:26:21,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:26:21,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:26:21,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:26:21,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:26:21,073 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:26:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:26:22,399 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 08:26:22,985 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-27 08:26:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3554 backedges. 440 proven. 1678 refuted. 0 times theorem prover too weak. 1436 trivial. 0 not checked. [2018-10-27 08:26:25,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:26:25,679 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:26:25,679 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1305 with the following transitions: [2018-10-27 08:26:25,679 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [527], [529], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [684], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [964], [965], [969], [972], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1256], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1392], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-10-27 08:26:25,685 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:26:25,685 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:26:26,038 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:26:26,038 INFO L272 AbstractInterpreter]: Visited 264 different actions 522 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 08:26:26,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:26:26,074 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:26:27,305 INFO L227 lantSequenceWeakener]: Weakened 1301 states. On average, predicates are now at 77.49% of their original sizes. [2018-10-27 08:26:27,305 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:26:27,895 INFO L415 sIntCurrentIteration]: We unified 1303 AI predicates to 1303 [2018-10-27 08:26:27,895 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:26:27,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:26:27,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2018-10-27 08:26:27,896 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:26:27,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 08:26:27,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 08:26:27,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 08:26:27,899 INFO L87 Difference]: Start difference. First operand 18525 states and 20448 transitions. Second operand 10 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown