java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label04_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 17:16:54,290 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 17:16:54,293 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 17:16:54,309 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 17:16:54,309 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 17:16:54,311 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 17:16:54,313 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 17:16:54,316 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 17:16:54,318 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 17:16:54,322 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 17:16:54,325 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 17:16:54,325 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 17:16:54,327 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 17:16:54,328 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 17:16:54,331 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 17:16:54,331 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 17:16:54,332 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 17:16:54,343 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 17:16:54,346 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 17:16:54,348 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 17:16:54,349 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 17:16:54,353 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 17:16:54,358 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 17:16:54,359 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 17:16:54,359 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 17:16:54,360 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 17:16:54,361 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 17:16:54,362 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 17:16:54,365 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 17:16:54,367 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 17:16:54,367 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 17:16:54,368 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-12 17:16:54,372 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 17:16:54,401 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 17:16:54,401 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 17:16:54,403 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 17:16:54,403 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 17:16:54,404 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 17:16:54,404 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 17:16:54,404 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 17:16:54,404 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 17:16:54,404 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 17:16:54,407 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 17:16:54,407 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 17:16:54,408 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 17:16:54,408 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 17:16:54,409 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 17:16:54,409 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 17:16:54,409 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 17:16:54,409 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 17:16:54,410 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 17:16:54,410 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 17:16:54,410 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 17:16:54,410 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 17:16:54,410 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 17:16:54,411 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 17:16:54,411 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 17:16:54,411 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 17:16:54,411 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 17:16:54,411 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 17:16:54,413 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 17:16:54,414 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 17:16:54,414 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 17:16:54,414 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 17:16:54,414 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 17:16:54,414 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 17:16:54,414 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 17:16:54,415 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 17:16:54,479 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 17:16:54,493 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 17:16:54,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 17:16:54,500 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 17:16:54,500 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 17:16:54,501 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label04_true-unreach-call.c [2018-11-12 17:16:54,577 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d742511/cb9ddd304bbc44bbad4a6ffe25f7d1b8/FLAG23fa3ef13 [2018-11-12 17:16:55,269 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 17:16:55,270 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label04_true-unreach-call.c [2018-11-12 17:16:55,302 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d742511/cb9ddd304bbc44bbad4a6ffe25f7d1b8/FLAG23fa3ef13 [2018-11-12 17:16:55,321 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d742511/cb9ddd304bbc44bbad4a6ffe25f7d1b8 [2018-11-12 17:16:55,334 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 17:16:55,335 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 17:16:55,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 17:16:55,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 17:16:55,343 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 17:16:55,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 05:16:55" (1/1) ... [2018-11-12 17:16:55,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c94142a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:55, skipping insertion in model container [2018-11-12 17:16:55,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 05:16:55" (1/1) ... [2018-11-12 17:16:55,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 17:16:55,440 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 17:16:56,117 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 17:16:56,123 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 17:16:56,457 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 17:16:56,483 INFO L193 MainTranslator]: Completed translation [2018-11-12 17:16:56,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56 WrapperNode [2018-11-12 17:16:56,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 17:16:56,485 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 17:16:56,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 17:16:56,485 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 17:16:56,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (1/1) ... [2018-11-12 17:16:56,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (1/1) ... [2018-11-12 17:16:56,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 17:16:56,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 17:16:56,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 17:16:56,710 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 17:16:56,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (1/1) ... [2018-11-12 17:16:56,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (1/1) ... [2018-11-12 17:16:56,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (1/1) ... [2018-11-12 17:16:56,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (1/1) ... [2018-11-12 17:16:56,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (1/1) ... [2018-11-12 17:16:56,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (1/1) ... [2018-11-12 17:16:56,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (1/1) ... [2018-11-12 17:16:56,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 17:16:56,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 17:16:56,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 17:16:56,886 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 17:16:56,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 17:16:56,958 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 17:16:56,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 17:16:56,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 17:16:56,959 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 17:16:56,960 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 17:16:56,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 17:16:56,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 17:16:56,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 17:16:56,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 17:17:01,464 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 17:17:01,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 05:17:01 BoogieIcfgContainer [2018-11-12 17:17:01,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 17:17:01,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 17:17:01,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 17:17:01,470 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 17:17:01,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 05:16:55" (1/3) ... [2018-11-12 17:17:01,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154073d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 05:17:01, skipping insertion in model container [2018-11-12 17:17:01,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:16:56" (2/3) ... [2018-11-12 17:17:01,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154073d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 05:17:01, skipping insertion in model container [2018-11-12 17:17:01,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 05:17:01" (3/3) ... [2018-11-12 17:17:01,474 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label04_true-unreach-call.c [2018-11-12 17:17:01,484 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 17:17:01,493 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 17:17:01,508 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 17:17:01,554 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 17:17:01,555 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 17:17:01,555 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 17:17:01,555 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 17:17:01,555 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 17:17:01,555 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 17:17:01,557 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 17:17:01,557 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 17:17:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-12 17:17:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-12 17:17:01,613 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:17:01,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:17:01,617 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:17:01,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:17:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1740554548, now seen corresponding path program 1 times [2018-11-12 17:17:01,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:17:01,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:01,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:17:01,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:01,677 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:17:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:17:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:17:02,895 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:17:02,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 17:17:02,896 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:17:02,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 17:17:02,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 17:17:02,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 17:17:02,920 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-12 17:17:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:17:06,606 INFO L93 Difference]: Finished difference Result 1057 states and 1905 transitions. [2018-11-12 17:17:06,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 17:17:06,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 205 [2018-11-12 17:17:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:17:06,633 INFO L225 Difference]: With dead ends: 1057 [2018-11-12 17:17:06,634 INFO L226 Difference]: Without dead ends: 739 [2018-11-12 17:17:06,641 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 17:17:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2018-11-12 17:17:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 528. [2018-11-12 17:17:06,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2018-11-12 17:17:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 879 transitions. [2018-11-12 17:17:06,741 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 879 transitions. Word has length 205 [2018-11-12 17:17:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:17:06,742 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 879 transitions. [2018-11-12 17:17:06,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 17:17:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 879 transitions. [2018-11-12 17:17:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-12 17:17:06,757 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:17:06,758 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 17:17:06,759 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:17:06,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:17:06,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1550134832, now seen corresponding path program 1 times [2018-11-12 17:17:06,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:17:06,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:06,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:17:06,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:06,761 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:17:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:17:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:17:07,176 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:17:07,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 17:17:07,176 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:17:07,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:17:07,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:17:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:17:07,180 INFO L87 Difference]: Start difference. First operand 528 states and 879 transitions. Second operand 3 states. [2018-11-12 17:17:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:17:09,068 INFO L93 Difference]: Finished difference Result 1482 states and 2549 transitions. [2018-11-12 17:17:09,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:17:09,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2018-11-12 17:17:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:17:09,079 INFO L225 Difference]: With dead ends: 1482 [2018-11-12 17:17:09,079 INFO L226 Difference]: Without dead ends: 960 [2018-11-12 17:17:09,082 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:17:09,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2018-11-12 17:17:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 946. [2018-11-12 17:17:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 946 states. [2018-11-12 17:17:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1557 transitions. [2018-11-12 17:17:09,134 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1557 transitions. Word has length 218 [2018-11-12 17:17:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:17:09,135 INFO L480 AbstractCegarLoop]: Abstraction has 946 states and 1557 transitions. [2018-11-12 17:17:09,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:17:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1557 transitions. [2018-11-12 17:17:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-11-12 17:17:09,141 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:17:09,142 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 17:17:09,142 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:17:09,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:17:09,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1141936112, now seen corresponding path program 1 times [2018-11-12 17:17:09,143 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:17:09,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:09,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:17:09,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:09,144 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:17:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:17:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:17:09,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:17:09,407 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:17:09,407 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 230 with the following transitions: [2018-11-12 17:17:09,410 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:17:09,478 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:17:09,478 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:17:11,023 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:17:11,024 INFO L272 AbstractInterpreter]: Visited 206 different actions 206 times. Never merged. Never widened. Performed 3502 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3502 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 88 variables. [2018-11-12 17:17:11,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:17:11,070 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:17:12,616 INFO L227 lantSequenceWeakener]: Weakened 220 states. On average, predicates are now at 74.78% of their original sizes. [2018-11-12 17:17:12,617 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:17:14,252 INFO L415 sIntCurrentIteration]: We unified 228 AI predicates to 228 [2018-11-12 17:17:14,252 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:17:14,253 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:17:14,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-11-12 17:17:14,254 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:17:14,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 17:17:14,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 17:17:14,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2018-11-12 17:17:14,255 INFO L87 Difference]: Start difference. First operand 946 states and 1557 transitions. Second operand 16 states. [2018-11-12 17:17:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:17:56,740 INFO L93 Difference]: Finished difference Result 2096 states and 3461 transitions. [2018-11-12 17:17:56,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 17:17:56,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 229 [2018-11-12 17:17:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:17:56,747 INFO L225 Difference]: With dead ends: 2096 [2018-11-12 17:17:56,748 INFO L226 Difference]: Without dead ends: 1156 [2018-11-12 17:17:56,751 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 231 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2018-11-12 17:17:56,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2018-11-12 17:17:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1154. [2018-11-12 17:17:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1154 states. [2018-11-12 17:17:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1775 transitions. [2018-11-12 17:17:56,785 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1775 transitions. Word has length 229 [2018-11-12 17:17:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:17:56,785 INFO L480 AbstractCegarLoop]: Abstraction has 1154 states and 1775 transitions. [2018-11-12 17:17:56,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-12 17:17:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1775 transitions. [2018-11-12 17:17:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-11-12 17:17:56,792 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:17:56,792 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 17:17:56,793 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:17:56,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:17:56,793 INFO L82 PathProgramCache]: Analyzing trace with hash 899426459, now seen corresponding path program 1 times [2018-11-12 17:17:56,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:17:56,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:56,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:17:56,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:17:56,795 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:17:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:17:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:17:57,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:17:57,404 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:17:57,404 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 239 with the following transitions: [2018-11-12 17:17:57,405 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:17:57,423 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:17:57,423 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:17:59,908 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:17:59,908 INFO L272 AbstractInterpreter]: Visited 210 different actions 412 times. Merged at 4 different actions 4 times. Never widened. Performed 9049 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9049 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:17:59,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:17:59,949 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:17:59,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:17:59,949 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 17:17:59,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:17:59,966 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:18:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:00,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:18:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:00,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:18:00,687 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-12 17:18:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:18:01,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:18:01,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-11-12 17:18:01,079 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:18:01,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 17:18:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 17:18:01,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-12 17:18:01,080 INFO L87 Difference]: Start difference. First operand 1154 states and 1775 transitions. Second operand 9 states. [2018-11-12 17:18:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:18:12,746 INFO L93 Difference]: Finished difference Result 9407 states and 19924 transitions. [2018-11-12 17:18:12,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-12 17:18:12,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 238 [2018-11-12 17:18:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:18:12,847 INFO L225 Difference]: With dead ends: 9407 [2018-11-12 17:18:12,848 INFO L226 Difference]: Without dead ends: 8467 [2018-11-12 17:18:12,889 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2018-11-12 17:18:12,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8467 states. [2018-11-12 17:18:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8467 to 8098. [2018-11-12 17:18:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8098 states. [2018-11-12 17:18:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8098 states to 8098 states and 12823 transitions. [2018-11-12 17:18:13,251 INFO L78 Accepts]: Start accepts. Automaton has 8098 states and 12823 transitions. Word has length 238 [2018-11-12 17:18:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:18:13,252 INFO L480 AbstractCegarLoop]: Abstraction has 8098 states and 12823 transitions. [2018-11-12 17:18:13,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 17:18:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8098 states and 12823 transitions. [2018-11-12 17:18:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-11-12 17:18:13,299 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:18:13,299 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 17:18:13,300 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:18:13,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:13,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1302031735, now seen corresponding path program 1 times [2018-11-12 17:18:13,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:18:13,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:13,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:18:13,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:18:13,302 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:18:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:18:13,596 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 17:18:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-12 17:18:14,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:18:14,025 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:18:14,025 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 243 with the following transitions: [2018-11-12 17:18:14,026 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:18:14,032 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:18:14,032 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:18:15,985 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:18:15,985 INFO L272 AbstractInterpreter]: Visited 209 different actions 414 times. Merged at 5 different actions 7 times. Never widened. Performed 12755 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12755 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:18:15,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:18:15,991 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:18:17,762 INFO L227 lantSequenceWeakener]: Weakened 76 states. On average, predicates are now at 85.27% of their original sizes. [2018-11-12 17:18:17,762 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:18:22,307 INFO L415 sIntCurrentIteration]: We unified 241 AI predicates to 241 [2018-11-12 17:18:22,308 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:18:22,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:18:22,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [6] total 25 [2018-11-12 17:18:22,308 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:18:22,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 17:18:22,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 17:18:22,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-11-12 17:18:22,310 INFO L87 Difference]: Start difference. First operand 8098 states and 12823 transitions. Second operand 21 states. [2018-11-12 17:19:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:19:32,692 INFO L93 Difference]: Finished difference Result 16776 states and 26273 transitions. [2018-11-12 17:19:32,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 17:19:32,692 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 242 [2018-11-12 17:19:32,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:19:32,736 INFO L225 Difference]: With dead ends: 16776 [2018-11-12 17:19:32,736 INFO L226 Difference]: Without dead ends: 8892 [2018-11-12 17:19:32,774 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 252 GetRequests, 189 SyntacticMatches, 33 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2018-11-12 17:19:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8892 states. [2018-11-12 17:19:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8892 to 8889. [2018-11-12 17:19:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8889 states. [2018-11-12 17:19:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 13211 transitions. [2018-11-12 17:19:33,022 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 13211 transitions. Word has length 242 [2018-11-12 17:19:33,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:19:33,023 INFO L480 AbstractCegarLoop]: Abstraction has 8889 states and 13211 transitions. [2018-11-12 17:19:33,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 17:19:33,023 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 13211 transitions. [2018-11-12 17:19:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-11-12 17:19:33,049 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:19:33,049 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 17:19:33,050 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:19:33,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash 244916885, now seen corresponding path program 1 times [2018-11-12 17:19:33,050 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:19:33,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:33,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:33,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:33,052 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:19:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:19:33,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:33,574 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:19:33,574 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 253 with the following transitions: [2018-11-12 17:19:33,575 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:19:33,580 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:19:33,581 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:19:35,207 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:19:35,207 INFO L272 AbstractInterpreter]: Visited 210 different actions 412 times. Merged at 4 different actions 4 times. Never widened. Performed 9011 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9011 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:19:35,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:35,212 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:19:35,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:35,212 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 17:19:35,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:35,223 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:19:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:35,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:19:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:19:35,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:19:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:19:35,648 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:19:35,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-12 17:19:35,648 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:19:35,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:19:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:19:35,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:19:35,649 INFO L87 Difference]: Start difference. First operand 8889 states and 13211 transitions. Second operand 3 states. [2018-11-12 17:19:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:19:37,129 INFO L93 Difference]: Finished difference Result 24385 states and 38199 transitions. [2018-11-12 17:19:37,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:19:37,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2018-11-12 17:19:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:19:37,218 INFO L225 Difference]: With dead ends: 24385 [2018-11-12 17:19:37,218 INFO L226 Difference]: Without dead ends: 15919 [2018-11-12 17:19:37,247 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 502 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:19:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15919 states. [2018-11-12 17:19:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15919 to 15895. [2018-11-12 17:19:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15895 states. [2018-11-12 17:19:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15895 states to 15895 states and 24597 transitions. [2018-11-12 17:19:37,714 INFO L78 Accepts]: Start accepts. Automaton has 15895 states and 24597 transitions. Word has length 252 [2018-11-12 17:19:37,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:19:37,715 INFO L480 AbstractCegarLoop]: Abstraction has 15895 states and 24597 transitions. [2018-11-12 17:19:37,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:19:37,715 INFO L276 IsEmpty]: Start isEmpty. Operand 15895 states and 24597 transitions. [2018-11-12 17:19:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-11-12 17:19:37,757 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:19:37,757 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:19:37,758 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:19:37,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:37,758 INFO L82 PathProgramCache]: Analyzing trace with hash 378616459, now seen corresponding path program 1 times [2018-11-12 17:19:37,758 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:19:37,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:37,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:37,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:37,759 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:19:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 72 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-12 17:19:38,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:38,259 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:19:38,260 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 264 with the following transitions: [2018-11-12 17:19:38,260 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:19:38,266 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:19:38,266 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:19:40,205 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:19:40,205 INFO L272 AbstractInterpreter]: Visited 211 different actions 414 times. Merged at 4 different actions 4 times. Never widened. Performed 9057 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9057 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:19:40,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:40,215 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:19:40,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:40,215 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 17:19:40,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:40,225 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:19:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:40,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:19:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-12 17:19:40,552 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:19:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-12 17:19:40,706 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:19:40,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-11-12 17:19:40,707 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:19:40,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:19:40,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:19:40,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-12 17:19:40,708 INFO L87 Difference]: Start difference. First operand 15895 states and 24597 transitions. Second operand 3 states. [2018-11-12 17:19:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:19:42,308 INFO L93 Difference]: Finished difference Result 30654 states and 48334 transitions. [2018-11-12 17:19:42,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:19:42,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 263 [2018-11-12 17:19:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:19:42,396 INFO L225 Difference]: With dead ends: 30654 [2018-11-12 17:19:42,396 INFO L226 Difference]: Without dead ends: 20296 [2018-11-12 17:19:42,424 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-12 17:19:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20296 states. [2018-11-12 17:19:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20296 to 20291. [2018-11-12 17:19:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20291 states. [2018-11-12 17:19:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20291 states to 20291 states and 31422 transitions. [2018-11-12 17:19:42,898 INFO L78 Accepts]: Start accepts. Automaton has 20291 states and 31422 transitions. Word has length 263 [2018-11-12 17:19:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:19:42,899 INFO L480 AbstractCegarLoop]: Abstraction has 20291 states and 31422 transitions. [2018-11-12 17:19:42,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:19:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 20291 states and 31422 transitions. [2018-11-12 17:19:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-11-12 17:19:42,959 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:19:42,963 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-12 17:19:42,963 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:19:42,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash -168769138, now seen corresponding path program 1 times [2018-11-12 17:19:42,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:19:42,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:42,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:42,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:42,965 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:19:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:43,566 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 17:19:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 17:19:43,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:43,831 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:19:43,832 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 322 with the following transitions: [2018-11-12 17:19:43,832 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:19:43,837 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:19:43,837 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:19:46,814 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:19:46,814 INFO L272 AbstractInterpreter]: Visited 211 different actions 625 times. Merged at 7 different actions 15 times. Never widened. Performed 14204 root evaluator evaluations with a maximum evaluation depth of 6. Performed 14204 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-12 17:19:46,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:46,824 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:19:46,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:46,824 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 17:19:46,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:46,836 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:19:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:47,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:19:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-12 17:19:47,280 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:19:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-12 17:19:47,904 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:19:47,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-12 17:19:47,905 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:19:47,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:19:47,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:19:47,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:19:47,906 INFO L87 Difference]: Start difference. First operand 20291 states and 31422 transitions. Second operand 3 states. [2018-11-12 17:19:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:19:49,984 INFO L93 Difference]: Finished difference Result 55612 states and 89132 transitions. [2018-11-12 17:19:49,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:19:49,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 321 [2018-11-12 17:19:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:19:50,147 INFO L225 Difference]: With dead ends: 55612 [2018-11-12 17:19:50,148 INFO L226 Difference]: Without dead ends: 36579 [2018-11-12 17:19:50,209 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 640 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:19:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36579 states. [2018-11-12 17:19:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36579 to 36576. [2018-11-12 17:19:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36576 states. [2018-11-12 17:19:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36576 states to 36576 states and 55084 transitions. [2018-11-12 17:19:51,072 INFO L78 Accepts]: Start accepts. Automaton has 36576 states and 55084 transitions. Word has length 321 [2018-11-12 17:19:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:19:51,073 INFO L480 AbstractCegarLoop]: Abstraction has 36576 states and 55084 transitions. [2018-11-12 17:19:51,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:19:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 36576 states and 55084 transitions. [2018-11-12 17:19:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-11-12 17:19:51,144 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:19:51,145 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:19:51,145 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:19:51,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1671326373, now seen corresponding path program 1 times [2018-11-12 17:19:51,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:19:51,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:51,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:51,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:19:51,147 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:19:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 142 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 17:19:51,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:51,405 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:19:51,405 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-11-12 17:19:51,405 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [342], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:19:51,411 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:19:51,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:19:52,845 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:19:52,846 INFO L272 AbstractInterpreter]: Visited 211 different actions 414 times. Merged at 4 different actions 4 times. Never widened. Performed 9066 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9066 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:19:52,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:19:52,856 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:19:52,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:19:52,856 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 17:19:52,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:19:52,865 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:19:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:19:53,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:19:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:19:53,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:19:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:19:53,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:19:53,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-12 17:19:53,763 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:19:53,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 17:19:53,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 17:19:53,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-12 17:19:53,764 INFO L87 Difference]: Start difference. First operand 36576 states and 55084 transitions. Second operand 9 states. [2018-11-12 17:19:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:19:58,040 INFO L93 Difference]: Finished difference Result 138268 states and 231104 transitions. [2018-11-12 17:19:58,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 17:19:58,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 333 [2018-11-12 17:19:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:19:58,639 INFO L225 Difference]: With dead ends: 138268 [2018-11-12 17:19:58,639 INFO L226 Difference]: Without dead ends: 102960 [2018-11-12 17:19:58,742 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 666 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-11-12 17:19:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102960 states. [2018-11-12 17:20:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102960 to 101993. [2018-11-12 17:20:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101993 states. [2018-11-12 17:20:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101993 states to 101993 states and 155413 transitions. [2018-11-12 17:20:02,046 INFO L78 Accepts]: Start accepts. Automaton has 101993 states and 155413 transitions. Word has length 333 [2018-11-12 17:20:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:20:02,046 INFO L480 AbstractCegarLoop]: Abstraction has 101993 states and 155413 transitions. [2018-11-12 17:20:02,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 17:20:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 101993 states and 155413 transitions. [2018-11-12 17:20:02,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-11-12 17:20:02,250 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:20:02,250 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 17:20:02,250 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:20:02,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:20:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash 606260825, now seen corresponding path program 1 times [2018-11-12 17:20:02,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:20:02,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:20:02,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:20:02,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:20:02,252 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:20:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:20:02,822 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 17:20:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 171 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 17:20:03,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:20:03,080 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:20:03,080 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 361 with the following transitions: [2018-11-12 17:20:03,081 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [366], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:20:03,087 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:20:03,087 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:20:06,788 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:20:06,788 INFO L272 AbstractInterpreter]: Visited 211 different actions 630 times. Merged at 7 different actions 20 times. Never widened. Performed 18478 root evaluator evaluations with a maximum evaluation depth of 6. Performed 18478 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-12 17:20:06,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:20:06,793 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:20:06,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:20:06,793 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 17:20:06,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:20:06,802 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:20:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:20:07,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:20:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:20:07,133 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:20:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:20:07,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:20:07,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-12 17:20:07,308 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:20:07,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 17:20:07,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 17:20:07,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-12 17:20:07,310 INFO L87 Difference]: Start difference. First operand 101993 states and 155413 transitions. Second operand 9 states. [2018-11-12 17:20:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:20:15,937 INFO L93 Difference]: Finished difference Result 210593 states and 343863 transitions. [2018-11-12 17:20:15,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-12 17:20:15,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2018-11-12 17:20:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:20:16,536 INFO L225 Difference]: With dead ends: 210593 [2018-11-12 17:20:16,536 INFO L226 Difference]: Without dead ends: 110294 [2018-11-12 17:20:16,752 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 754 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=500, Invalid=1950, Unknown=0, NotChecked=0, Total=2450 [2018-11-12 17:20:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110294 states. [2018-11-12 17:20:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110294 to 105890. [2018-11-12 17:20:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105890 states. [2018-11-12 17:20:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105890 states to 105890 states and 141586 transitions. [2018-11-12 17:20:19,965 INFO L78 Accepts]: Start accepts. Automaton has 105890 states and 141586 transitions. Word has length 360 [2018-11-12 17:20:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:20:19,966 INFO L480 AbstractCegarLoop]: Abstraction has 105890 states and 141586 transitions. [2018-11-12 17:20:19,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 17:20:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 105890 states and 141586 transitions. [2018-11-12 17:20:20,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-11-12 17:20:20,105 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:20:20,106 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 17:20:20,106 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:20:20,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:20:20,107 INFO L82 PathProgramCache]: Analyzing trace with hash 61775672, now seen corresponding path program 1 times [2018-11-12 17:20:20,107 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:20:20,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:20:20,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:20:20,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:20:20,108 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:20:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:20:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:20:20,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:20:20,760 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:20:20,760 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 394 with the following transitions: [2018-11-12 17:20:20,760 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [366], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1101], [1103], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:20:20,765 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:20:20,765 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:20:21,926 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:20:21,926 INFO L272 AbstractInterpreter]: Visited 209 different actions 412 times. Merged at 5 different actions 5 times. Never widened. Performed 7763 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7763 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 17:20:21,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:20:21,936 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:20:26,839 INFO L227 lantSequenceWeakener]: Weakened 390 states. On average, predicates are now at 72.6% of their original sizes. [2018-11-12 17:20:26,839 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:20:27,170 INFO L415 sIntCurrentIteration]: We unified 392 AI predicates to 392 [2018-11-12 17:20:27,171 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:20:27,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:20:27,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [6] total 22 [2018-11-12 17:20:27,171 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:20:27,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 17:20:27,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 17:20:27,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-11-12 17:20:27,173 INFO L87 Difference]: Start difference. First operand 105890 states and 141586 transitions. Second operand 18 states. Received shutdown request... [2018-11-12 17:20:38,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 17:20:38,905 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 17:20:38,910 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 17:20:38,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 05:20:38 BoogieIcfgContainer [2018-11-12 17:20:38,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 17:20:38,912 INFO L168 Benchmark]: Toolchain (without parser) took 223577.61 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-11-12 17:20:38,913 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 17:20:38,913 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1147.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-12 17:20:38,914 INFO L168 Benchmark]: Boogie Procedure Inliner took 224.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 742.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -868.5 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. [2018-11-12 17:20:38,915 INFO L168 Benchmark]: Boogie Preprocessor took 175.57 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 17:20:38,916 INFO L168 Benchmark]: RCFGBuilder took 4579.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 250.6 MB). Peak memory consumption was 250.6 MB. Max. memory is 7.1 GB. [2018-11-12 17:20:38,917 INFO L168 Benchmark]: TraceAbstraction took 217444.26 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 3.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-12 17:20:38,927 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1147.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 224.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 742.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -868.5 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 175.57 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4579.86 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 250.6 MB). Peak memory consumption was 250.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 217444.26 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 3.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1629]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1629). Cancelled while BasicCegarLoop was constructing difference of abstraction (105890states) and FLOYD_HOARE automaton (currently 13 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (883 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 217.3s OverallTime, 11 OverallIterations, 4 TraceHistogramMax, 162.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3271 SDtfs, 14465 SDslu, 3450 SDs, 0 SdLazy, 25965 SolverSat, 4633 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96.4s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 4604 GetRequests, 4372 SyntacticMatches, 40 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105890occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 19.0s AbstIntTime, 9 AbstIntIterations, 3 AbstIntStrong, 0.9993096095532639 AbsIntWeakeningRatio, 0.21951219512195122 AbsIntAvgWeakeningVarsNumRemoved, 53.54471544715447 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 9.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 6002 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 4821 NumberOfCodeBlocks, 4821 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 6565 ConstructedInterpolants, 0 QuantifiedInterpolants, 4286480 SizeOfPredicates, 9 NumberOfNonLiveVariables, 7296 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 2604/2737 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown