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/Problem17_label11_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 01:54:55,291 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 01:54:55,293 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 01:54:55,307 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 01:54:55,307 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 01:54:55,308 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 01:54:55,310 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 01:54:55,311 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 01:54:55,313 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 01:54:55,314 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 01:54:55,315 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 01:54:55,315 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 01:54:55,316 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 01:54:55,317 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 01:54:55,318 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 01:54:55,320 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 01:54:55,321 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 01:54:55,324 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 01:54:55,329 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 01:54:55,335 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 01:54:55,336 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 01:54:55,337 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 01:54:55,343 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-25 01:54:55,343 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-25 01:54:55,343 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-25 01:54:55,344 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-25 01:54:55,347 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-25 01:54:55,348 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-25 01:54:55,350 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-25 01:54:55,353 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-25 01:54:55,353 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-25 01:54:55,353 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-25 01:54:55,357 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 [2018-10-25 01:54:55,374 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 01:54:55,374 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 01:54:55,378 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 01:54:55,378 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 01:54:55,379 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 01:54:55,379 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 01:54:55,379 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 01:54:55,379 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 01:54:55,379 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 01:54:55,380 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 01:54:55,382 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 01:54:55,382 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 01:54:55,382 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 01:54:55,382 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 01:54:55,383 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 01:54:55,383 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 01:54:55,383 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 01:54:55,384 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 01:54:55,384 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 01:54:55,384 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 01:54:55,384 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 01:54:55,384 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 01:54:55,384 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 01:54:55,385 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 01:54:55,385 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 01:54:55,385 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 01:54:55,385 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 01:54:55,385 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 01:54:55,388 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 01:54:55,388 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 01:54:55,388 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 01:54:55,388 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 01:54:55,389 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 01:54:55,389 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 01:54:55,389 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 01:54:55,389 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 01:54:55,443 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 01:54:55,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 01:54:55,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 01:54:55,465 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 01:54:55,465 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 01:54:55,466 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-10-25 01:54:55,527 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9e08b4868/aa2cab39fe3b4df79715428a1d2bcd6e/FLAG5d9ea4351 [2018-10-25 01:54:56,197 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 01:54:56,198 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-10-25 01:54:56,223 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9e08b4868/aa2cab39fe3b4df79715428a1d2bcd6e/FLAG5d9ea4351 [2018-10-25 01:54:56,238 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9e08b4868/aa2cab39fe3b4df79715428a1d2bcd6e [2018-10-25 01:54:56,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 01:54:56,253 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 01:54:56,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 01:54:56,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 01:54:56,260 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 01:54:56,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:54:56" (1/1) ... [2018-10-25 01:54:56,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa7dfef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:56, skipping insertion in model container [2018-10-25 01:54:56,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:54:56" (1/1) ... [2018-10-25 01:54:56,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 01:54:56,407 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 01:54:57,643 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:54:57,648 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 01:54:58,054 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:54:58,081 INFO L193 MainTranslator]: Completed translation [2018-10-25 01:54:58,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58 WrapperNode [2018-10-25 01:54:58,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 01:54:58,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 01:54:58,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 01:54:58,083 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 01:54:58,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (1/1) ... [2018-10-25 01:54:58,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (1/1) ... [2018-10-25 01:54:58,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 01:54:58,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 01:54:58,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 01:54:58,555 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 01:54:58,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (1/1) ... [2018-10-25 01:54:58,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (1/1) ... [2018-10-25 01:54:58,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (1/1) ... [2018-10-25 01:54:58,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (1/1) ... [2018-10-25 01:54:58,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (1/1) ... [2018-10-25 01:54:58,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (1/1) ... [2018-10-25 01:54:58,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (1/1) ... [2018-10-25 01:54:58,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 01:54:58,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 01:54:58,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 01:54:58,833 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 01:54:58,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (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 [2018-10-25 01:54:58,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 01:54:58,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 01:54:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-25 01:54:58,902 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-25 01:54:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 01:54:58,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 01:54:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 01:54:58,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 01:54:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 01:54:58,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 01:55:11,265 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 01:55:11,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:55:11 BoogieIcfgContainer [2018-10-25 01:55:11,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 01:55:11,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 01:55:11,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 01:55:11,271 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 01:55:11,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 01:54:56" (1/3) ... [2018-10-25 01:55:11,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57430625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:55:11, skipping insertion in model container [2018-10-25 01:55:11,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:54:58" (2/3) ... [2018-10-25 01:55:11,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57430625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:55:11, skipping insertion in model container [2018-10-25 01:55:11,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:55:11" (3/3) ... [2018-10-25 01:55:11,275 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label11_true-unreach-call.c [2018-10-25 01:55:11,285 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 01:55:11,295 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 01:55:11,314 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 01:55:11,359 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 01:55:11,359 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 01:55:11,360 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 01:55:11,360 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 01:55:11,360 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 01:55:11,360 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 01:55:11,360 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 01:55:11,361 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 01:55:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-25 01:55:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-25 01:55:11,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:55:11,408 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, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:55:11,411 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:55:11,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:55:11,418 INFO L82 PathProgramCache]: Analyzing trace with hash -492133930, now seen corresponding path program 1 times [2018-10-25 01:55:11,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:55:11,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:11,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:55:11,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:11,478 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:55:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:55:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:55:11,950 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:55:11,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 01:55:11,950 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:55:11,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 01:55:11,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 01:55:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:55:11,976 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-25 01:55:23,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:55:23,188 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-10-25 01:55:23,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 01:55:23,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-10-25 01:55:23,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:55:23,235 INFO L225 Difference]: With dead ends: 2164 [2018-10-25 01:55:23,235 INFO L226 Difference]: Without dead ends: 1554 [2018-10-25 01:55:23,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:55:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-10-25 01:55:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1052. [2018-10-25 01:55:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-10-25 01:55:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1882 transitions. [2018-10-25 01:55:23,384 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1882 transitions. Word has length 63 [2018-10-25 01:55:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:55:23,385 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1882 transitions. [2018-10-25 01:55:23,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 01:55:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1882 transitions. [2018-10-25 01:55:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-25 01:55:23,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:55:23,400 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, 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] [2018-10-25 01:55:23,403 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:55:23,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:55:23,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1696460921, now seen corresponding path program 1 times [2018-10-25 01:55:23,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:55:23,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:23,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:55:23,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:23,407 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:55:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:55:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:55:23,763 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:55:23,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-25 01:55:23,763 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:55:23,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-25 01:55:23,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-25 01:55:23,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-25 01:55:23,766 INFO L87 Difference]: Start difference. First operand 1052 states and 1882 transitions. Second operand 5 states. [2018-10-25 01:55:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:55:32,468 INFO L93 Difference]: Finished difference Result 3031 states and 5537 transitions. [2018-10-25 01:55:32,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-25 01:55:32,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2018-10-25 01:55:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:55:32,486 INFO L225 Difference]: With dead ends: 3031 [2018-10-25 01:55:32,486 INFO L226 Difference]: Without dead ends: 1985 [2018-10-25 01:55:32,491 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 [2018-10-25 01:55:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-10-25 01:55:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-10-25 01:55:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-10-25 01:55:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-10-25 01:55:32,567 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 135 [2018-10-25 01:55:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:55:32,568 INFO L481 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-10-25 01:55:32,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-25 01:55:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-10-25 01:55:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-25 01:55:32,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:55:32,574 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, 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] [2018-10-25 01:55:32,574 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:55:32,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:55:32,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1297606689, now seen corresponding path program 1 times [2018-10-25 01:55:32,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:55:32,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:32,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:55:32,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:32,576 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:55:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:55:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:55:32,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:55:32,996 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:55:32,997 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 139 with the following transitions: [2018-10-25 01:55:32,999 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:55:33,049 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:55:33,050 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:55:34,903 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:55:34,904 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 01:55:34,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:55:34,950 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:55:34,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:55:34,951 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 [2018-10-25 01:55:34,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:55:34,967 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:55:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:55:35,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:55:38,834 WARN L179 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 32 [2018-10-25 01:55:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:55:41,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:55:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:55:41,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 01:55:41,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-10-25 01:55:41,765 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:55:41,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:55:41,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:55:41,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-10-25 01:55:41,767 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 3 states. [2018-10-25 01:55:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:55:47,887 INFO L93 Difference]: Finished difference Result 5693 states and 9655 transitions. [2018-10-25 01:55:47,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:55:47,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2018-10-25 01:55:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:55:47,924 INFO L225 Difference]: With dead ends: 5693 [2018-10-25 01:55:47,925 INFO L226 Difference]: Without dead ends: 3740 [2018-10-25 01:55:47,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-10-25 01:55:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2018-10-25 01:55:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3734. [2018-10-25 01:55:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3734 states. [2018-10-25 01:55:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 6077 transitions. [2018-10-25 01:55:48,053 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 6077 transitions. Word has length 138 [2018-10-25 01:55:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:55:48,054 INFO L481 AbstractCegarLoop]: Abstraction has 3734 states and 6077 transitions. [2018-10-25 01:55:48,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:55:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 6077 transitions. [2018-10-25 01:55:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-25 01:55:48,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:55:48,062 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:55:48,063 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:55:48,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:55:48,063 INFO L82 PathProgramCache]: Analyzing trace with hash -291330969, now seen corresponding path program 1 times [2018-10-25 01:55:48,063 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:55:48,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:48,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:55:48,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:48,065 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:55:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:55:48,389 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 01:55:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 113 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-25 01:55:48,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:55:48,791 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:55:48,791 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 236 with the following transitions: [2018-10-25 01:55:48,792 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1310], [1315], [1317], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:55:48,799 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:55:48,800 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:55:50,117 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:55:50,117 INFO L272 AbstractInterpreter]: Visited 104 different actions 298 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 01:55:50,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:55:50,154 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:55:50,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:55:50,154 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:55:50,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:55:50,167 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:55:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:55:50,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:55:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:55:50,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:55:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:55:50,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 01:55:50,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-25 01:55:50,868 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 01:55:50,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-25 01:55:50,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-25 01:55:50,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-25 01:55:50,869 INFO L87 Difference]: Start difference. First operand 3734 states and 6077 transitions. Second operand 9 states. [2018-10-25 01:56:04,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:56:04,050 INFO L93 Difference]: Finished difference Result 9304 states and 15017 transitions. [2018-10-25 01:56:04,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-25 01:56:04,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 235 [2018-10-25 01:56:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:56:04,072 INFO L225 Difference]: With dead ends: 9304 [2018-10-25 01:56:04,072 INFO L226 Difference]: Without dead ends: 4597 [2018-10-25 01:56:04,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 468 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2018-10-25 01:56:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4597 states. [2018-10-25 01:56:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4597 to 4560. [2018-10-25 01:56:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2018-10-25 01:56:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 5524 transitions. [2018-10-25 01:56:04,204 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 5524 transitions. Word has length 235 [2018-10-25 01:56:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:56:04,205 INFO L481 AbstractCegarLoop]: Abstraction has 4560 states and 5524 transitions. [2018-10-25 01:56:04,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-25 01:56:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 5524 transitions. [2018-10-25 01:56:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-10-25 01:56:04,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:56:04,212 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:56:04,213 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:56:04,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:56:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1705786468, now seen corresponding path program 1 times [2018-10-25 01:56:04,213 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:56:04,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:56:04,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:56:04,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:56:04,215 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:56:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:56:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 170 proven. 19 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-10-25 01:56:04,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:56:04,947 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:56:04,948 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-10-25 01:56:04,948 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:56:04,954 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:56:04,954 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:56:06,307 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:56:06,308 INFO L272 AbstractInterpreter]: Visited 120 different actions 241 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-25 01:56:06,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:56:06,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:56:06,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:56:06,343 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 [2018-10-25 01:56:06,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:56:06,356 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:56:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:56:06,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:56:07,007 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-10-25 01:56:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-25 01:56:07,456 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:56:07,605 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-10-25 01:56:12,400 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-10-25 01:56:12,550 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-10-25 01:56:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 174 proven. 221 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-25 01:56:13,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 01:56:13,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2018-10-25 01:56:13,397 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 01:56:13,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-25 01:56:13,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-25 01:56:13,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=305, Unknown=1, NotChecked=0, Total=380 [2018-10-25 01:56:13,398 INFO L87 Difference]: Start difference. First operand 4560 states and 5524 transitions. Second operand 15 states. [2018-10-25 01:56:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:56:52,790 INFO L93 Difference]: Finished difference Result 27133 states and 35144 transitions. [2018-10-25 01:56:52,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-25 01:56:52,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 333 [2018-10-25 01:56:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:56:52,896 INFO L225 Difference]: With dead ends: 27133 [2018-10-25 01:56:52,897 INFO L226 Difference]: Without dead ends: 21690 [2018-10-25 01:56:52,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 658 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=833, Invalid=3722, Unknown=1, NotChecked=0, Total=4556 [2018-10-25 01:56:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21690 states. [2018-10-25 01:56:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21690 to 20570. [2018-10-25 01:56:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20570 states. [2018-10-25 01:56:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20570 states to 20570 states and 24432 transitions. [2018-10-25 01:56:53,555 INFO L78 Accepts]: Start accepts. Automaton has 20570 states and 24432 transitions. Word has length 333 [2018-10-25 01:56:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:56:53,556 INFO L481 AbstractCegarLoop]: Abstraction has 20570 states and 24432 transitions. [2018-10-25 01:56:53,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-25 01:56:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 20570 states and 24432 transitions. [2018-10-25 01:56:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-25 01:56:53,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:56:53,573 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:56:53,573 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:56:53,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:56:53,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1877965642, now seen corresponding path program 1 times [2018-10-25 01:56:53,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:56:53,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:56:53,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:56:53,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:56:53,575 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:56:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:56:54,366 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-10-25 01:56:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:56:54,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:56:54,750 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:56:54,750 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 412 with the following transitions: [2018-10-25 01:56:54,751 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [273], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:56:54,761 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:56:54,762 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:56:55,860 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:56:55,860 INFO L272 AbstractInterpreter]: Visited 356 different actions 1054 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 01:56:55,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:56:55,901 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:56:55,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:56:55,902 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:56:55,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:56:55,919 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:56:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:56:56,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:57:02,586 WARN L179 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 38 [2018-10-25 01:57:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:57:02,812 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:57:05,102 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2018-10-25 01:57:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:57:08,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 01:57:08,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-10-25 01:57:08,041 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:57:08,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 01:57:08,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 01:57:08,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-10-25 01:57:08,044 INFO L87 Difference]: Start difference. First operand 20570 states and 24432 transitions. Second operand 6 states. [2018-10-25 01:57:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:57:33,023 INFO L93 Difference]: Finished difference Result 48567 states and 58147 transitions. [2018-10-25 01:57:33,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-25 01:57:33,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 411 [2018-10-25 01:57:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:57:33,127 INFO L225 Difference]: With dead ends: 48567 [2018-10-25 01:57:33,127 INFO L226 Difference]: Without dead ends: 28879 [2018-10-25 01:57:33,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 816 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=53, Invalid=128, Unknown=1, NotChecked=0, Total=182 [2018-10-25 01:57:33,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28879 states. [2018-10-25 01:57:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28879 to 28404. [2018-10-25 01:57:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28404 states. [2018-10-25 01:57:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28404 states to 28404 states and 33868 transitions. [2018-10-25 01:57:33,802 INFO L78 Accepts]: Start accepts. Automaton has 28404 states and 33868 transitions. Word has length 411 [2018-10-25 01:57:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:57:33,803 INFO L481 AbstractCegarLoop]: Abstraction has 28404 states and 33868 transitions. [2018-10-25 01:57:33,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 01:57:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 28404 states and 33868 transitions. [2018-10-25 01:57:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2018-10-25 01:57:33,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:57:33,829 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:57:33,829 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:57:33,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:33,830 INFO L82 PathProgramCache]: Analyzing trace with hash 457550837, now seen corresponding path program 1 times [2018-10-25 01:57:33,830 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:57:33,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:33,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:33,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:33,831 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:57:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 240 proven. 2 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2018-10-25 01:57:34,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:57:34,387 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:57:34,388 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 473 with the following transitions: [2018-10-25 01:57:34,388 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1376], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1508], [1511], [1515], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:57:34,391 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:57:34,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:57:34,701 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:57:34,701 INFO L272 AbstractInterpreter]: Visited 146 different actions 292 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-25 01:57:34,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:34,739 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:57:34,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:57:34,739 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:57:34,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:34,751 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:57:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:34,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:57:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 572 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-10-25 01:57:35,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:57:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 246 proven. 8 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2018-10-25 01:57:35,614 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 01:57:35,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2018-10-25 01:57:35,615 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:57:35,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:57:35,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:57:35,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-25 01:57:35,616 INFO L87 Difference]: Start difference. First operand 28404 states and 33868 transitions. Second operand 3 states. [2018-10-25 01:57:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:57:37,869 INFO L93 Difference]: Finished difference Result 55884 states and 66845 transitions. [2018-10-25 01:57:37,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:57:37,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2018-10-25 01:57:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:57:37,957 INFO L225 Difference]: With dead ends: 55884 [2018-10-25 01:57:37,958 INFO L226 Difference]: Without dead ends: 27919 [2018-10-25 01:57:38,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 947 GetRequests, 940 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-25 01:57:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27919 states. [2018-10-25 01:57:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27919 to 27915. [2018-10-25 01:57:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27915 states. [2018-10-25 01:57:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27915 states to 27915 states and 33234 transitions. [2018-10-25 01:57:38,502 INFO L78 Accepts]: Start accepts. Automaton has 27915 states and 33234 transitions. Word has length 472 [2018-10-25 01:57:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:57:38,505 INFO L481 AbstractCegarLoop]: Abstraction has 27915 states and 33234 transitions. [2018-10-25 01:57:38,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:57:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 27915 states and 33234 transitions. [2018-10-25 01:57:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2018-10-25 01:57:38,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:57:38,531 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-25 01:57:38,531 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:57:38,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash -404401180, now seen corresponding path program 1 times [2018-10-25 01:57:38,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:57:38,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:38,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:38,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:38,533 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:57:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 166 proven. 180 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-10-25 01:57:39,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:57:39,731 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:57:39,731 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 488 with the following transitions: [2018-10-25 01:57:39,732 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1658], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1720], [1723], [1727], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:57:39,735 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:57:39,736 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:57:40,433 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:57:40,433 INFO L272 AbstractInterpreter]: Visited 185 different actions 560 times. Merged at 8 different actions 30 times. Widened at 1 different actions 2 times. Found 5 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-25 01:57:40,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:40,446 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:57:40,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:57:40,446 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:57:40,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:40,454 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:57:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:40,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:57:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-25 01:57:41,223 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:57:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-25 01:57:41,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 01:57:41,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2018-10-25 01:57:41,740 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 01:57:41,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-25 01:57:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-25 01:57:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-10-25 01:57:41,742 INFO L87 Difference]: Start difference. First operand 27915 states and 33234 transitions. Second operand 12 states. [2018-10-25 01:58:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:58:01,083 INFO L93 Difference]: Finished difference Result 74283 states and 89820 transitions. [2018-10-25 01:58:01,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-25 01:58:01,084 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 487 [2018-10-25 01:58:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:58:01,229 INFO L225 Difference]: With dead ends: 74283 [2018-10-25 01:58:01,229 INFO L226 Difference]: Without dead ends: 46810 [2018-10-25 01:58:01,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 1006 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2018-10-25 01:58:01,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46810 states. [2018-10-25 01:58:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46810 to 43519. [2018-10-25 01:58:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43519 states. [2018-10-25 01:58:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43519 states to 43519 states and 51172 transitions. [2018-10-25 01:58:01,999 INFO L78 Accepts]: Start accepts. Automaton has 43519 states and 51172 transitions. Word has length 487 [2018-10-25 01:58:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:58:02,000 INFO L481 AbstractCegarLoop]: Abstraction has 43519 states and 51172 transitions. [2018-10-25 01:58:02,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-25 01:58:02,000 INFO L276 IsEmpty]: Start isEmpty. Operand 43519 states and 51172 transitions. [2018-10-25 01:58:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2018-10-25 01:58:02,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:58:02,042 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-25 01:58:02,043 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:58:02,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:58:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash -73523263, now seen corresponding path program 1 times [2018-10-25 01:58:02,043 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:58:02,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:58:02,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:58:02,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:58:02,045 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:58:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:58:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 237 proven. 462 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-25 01:58:04,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:58:04,066 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:58:04,066 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 566 with the following transitions: [2018-10-25 01:58:04,066 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1681], [1686], [1688], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1720], [1725], [1727], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:58:04,070 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:58:04,070 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:58:06,837 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:58:06,837 INFO L272 AbstractInterpreter]: Visited 188 different actions 570 times. Merged at 9 different actions 33 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 4 different actions. Largest state had 26 variables. [2018-10-25 01:58:06,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:58:06,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:58:06,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:58:06,865 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:58:06,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:58:06,875 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:58:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:58:07,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:58:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 540 proven. 55 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-25 01:58:08,503 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:58:09,255 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-10-25 01:58:09,344 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 108 [2018-10-25 01:58:10,400 WARN L179 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2018-10-25 01:58:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 239 proven. 460 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-25 01:58:11,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 01:58:11,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2018-10-25 01:58:11,699 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 01:58:11,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-25 01:58:11,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-25 01:58:11,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2018-10-25 01:58:11,700 INFO L87 Difference]: Start difference. First operand 43519 states and 51172 transitions. Second operand 22 states. [2018-10-25 01:58:12,020 WARN L179 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2018-10-25 01:58:15,294 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-10-25 01:58:15,725 WARN L179 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-10-25 01:58:16,935 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2018-10-25 01:58:17,557 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-10-25 01:58:19,795 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2018-10-25 01:58:26,596 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2018-10-25 01:58:26,830 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2018-10-25 01:58:34,013 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2018-10-25 01:58:37,456 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2018-10-25 01:58:37,728 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2018-10-25 01:58:40,375 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-10-25 01:58:42,556 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2018-10-25 01:58:43,240 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2018-10-25 01:58:44,237 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 Received shutdown request... [2018-10-25 01:58:46,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-25 01:58:46,631 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-25 01:58:46,636 WARN L205 ceAbstractionStarter]: Timeout [2018-10-25 01:58:46,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 01:58:46 BoogieIcfgContainer [2018-10-25 01:58:46,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-25 01:58:46,638 INFO L168 Benchmark]: Toolchain (without parser) took 230387.12 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.6 GB in the end (delta: -2.2 GB). Peak memory consumption was 294.2 MB. Max. memory is 7.1 GB. [2018-10-25 01:58:46,639 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-25 01:58:46,639 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1828.08 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-25 01:58:46,640 INFO L168 Benchmark]: Boogie Procedure Inliner took 471.79 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -936.2 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. [2018-10-25 01:58:46,641 INFO L168 Benchmark]: Boogie Preprocessor took 277.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-10-25 01:58:46,642 INFO L168 Benchmark]: RCFGBuilder took 12433.84 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 468.7 MB). Peak memory consumption was 468.7 MB. Max. memory is 7.1 GB. [2018-10-25 01:58:46,643 INFO L168 Benchmark]: TraceAbstraction took 215369.81 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 3.6 GB in the end (delta: -1.9 GB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-25 01:58:46,647 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1828.08 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 471.79 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -936.2 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 277.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12433.84 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 468.7 MB). Peak memory consumption was 468.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215369.81 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 3.6 GB in the end (delta: -1.9 GB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 176]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 176). Cancelled while BasicCegarLoop was constructing difference of abstraction (43519states) and FLOYD_HOARE automaton (currently 88 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (28022 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 215.2s OverallTime, 9 OverallIterations, 5 TraceHistogramMax, 160.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2263 SDtfs, 43095 SDslu, 3567 SDs, 0 SdLazy, 51315 SolverSat, 10733 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 135.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5650 GetRequests, 5344 SyntacticMatches, 25 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6127 ImplicationChecksByTransitivity, 36.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43519occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.7s AbstIntTime, 7 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 8 MinimizatonAttempts, 5461 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 37.3s InterpolantComputationTime, 5480 NumberOfCodeBlocks, 5480 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 8098 ConstructedInterpolants, 611 QuantifiedInterpolants, 24204224 SizeOfPredicates, 30 NumberOfNonLiveVariables, 4162 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 6588/8228 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown