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_label55_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 17:27:15,355 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 17:27:15,358 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 17:27:15,376 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 17:27:15,378 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 17:27:15,379 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 17:27:15,380 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 17:27:15,383 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 17:27:15,393 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 17:27:15,394 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 17:27:15,395 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 17:27:15,395 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 17:27:15,398 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 17:27:15,401 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 17:27:15,404 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 17:27:15,405 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 17:27:15,406 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 17:27:15,408 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 17:27:15,410 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 17:27:15,411 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 17:27:15,413 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 17:27:15,414 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 17:27:15,416 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 17:27:15,416 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 17:27:15,416 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 17:27:15,417 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 17:27:15,418 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 17:27:15,419 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 17:27:15,420 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 17:27:15,421 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 17:27:15,422 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 17:27:15,423 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 17:27:15,423 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 17:27:15,424 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 17:27:15,425 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 17:27:15,425 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 17:27:15,426 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 17:27:15,454 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 17:27:15,455 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 17:27:15,459 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 17:27:15,460 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 17:27:15,460 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 17:27:15,460 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 17:27:15,460 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 17:27:15,460 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 17:27:15,461 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 17:27:15,461 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 17:27:15,461 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 17:27:15,461 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 17:27:15,461 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 17:27:15,463 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 17:27:15,463 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 17:27:15,463 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 17:27:15,463 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 17:27:15,463 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 17:27:15,465 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 17:27:15,465 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 17:27:15,465 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 17:27:15,465 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 17:27:15,466 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 17:27:15,466 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 17:27:15,466 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 17:27:15,466 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 17:27:15,466 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 17:27:15,466 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 17:27:15,467 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 17:27:15,467 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 17:27:15,467 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 17:27:15,467 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 17:27:15,467 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 17:27:15,468 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 17:27:15,468 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 17:27:15,512 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 17:27:15,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 17:27:15,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 17:27:15,533 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 17:27:15,533 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 17:27:15,534 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label55_true-unreach-call.c [2018-11-12 17:27:15,601 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b315ede75/ed4245317e154615ae9d778e1147dda8/FLAG070556679 [2018-11-12 17:27:16,239 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 17:27:16,240 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label55_true-unreach-call.c [2018-11-12 17:27:16,261 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b315ede75/ed4245317e154615ae9d778e1147dda8/FLAG070556679 [2018-11-12 17:27:16,279 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b315ede75/ed4245317e154615ae9d778e1147dda8 [2018-11-12 17:27:16,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 17:27:16,292 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 17:27:16,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 17:27:16,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 17:27:16,296 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 17:27:16,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 05:27:16" (1/1) ... [2018-11-12 17:27:16,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17315423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:16, skipping insertion in model container [2018-11-12 17:27:16,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 05:27:16" (1/1) ... [2018-11-12 17:27:16,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 17:27:16,397 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 17:27:17,207 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 17:27:17,213 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 17:27:17,561 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 17:27:17,584 INFO L193 MainTranslator]: Completed translation [2018-11-12 17:27:17,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17 WrapperNode [2018-11-12 17:27:17,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 17:27:17,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 17:27:17,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 17:27:17,586 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 17:27:17,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (1/1) ... [2018-11-12 17:27:17,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (1/1) ... [2018-11-12 17:27:17,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 17:27:17,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 17:27:17,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 17:27:17,824 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 17:27:17,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (1/1) ... [2018-11-12 17:27:17,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (1/1) ... [2018-11-12 17:27:17,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (1/1) ... [2018-11-12 17:27:17,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (1/1) ... [2018-11-12 17:27:17,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (1/1) ... [2018-11-12 17:27:17,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (1/1) ... [2018-11-12 17:27:17,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (1/1) ... [2018-11-12 17:27:17,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 17:27:17,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 17:27:17,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 17:27:17,967 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 17:27:17,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (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 17:27:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 17:27:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 17:27:18,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 17:27:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 17:27:18,040 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 17:27:18,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 17:27:18,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 17:27:18,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 17:27:18,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 17:27:23,407 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 17:27:23,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 05:27:23 BoogieIcfgContainer [2018-11-12 17:27:23,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 17:27:23,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 17:27:23,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 17:27:23,413 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 17:27:23,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 05:27:16" (1/3) ... [2018-11-12 17:27:23,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5238486b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 05:27:23, skipping insertion in model container [2018-11-12 17:27:23,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 05:27:17" (2/3) ... [2018-11-12 17:27:23,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5238486b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 05:27:23, skipping insertion in model container [2018-11-12 17:27:23,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 05:27:23" (3/3) ... [2018-11-12 17:27:23,417 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label55_true-unreach-call.c [2018-11-12 17:27:23,425 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 17:27:23,434 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 17:27:23,452 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 17:27:23,490 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 17:27:23,491 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 17:27:23,491 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 17:27:23,491 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 17:27:23,491 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 17:27:23,491 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 17:27:23,492 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 17:27:23,492 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 17:27:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-12 17:27:23,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-12 17:27:23,539 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:27:23,540 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] [2018-11-12 17:27:23,543 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:27:23,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1276853404, now seen corresponding path program 1 times [2018-11-12 17:27:23,552 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:27:23,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:23,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:23,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:23,607 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:27:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:24,352 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 17:27:24,572 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 17:27:24,574 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:27:24,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 17:27:24,575 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:27:24,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:27:24,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:27:24,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:27:24,603 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-11-12 17:27:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:27:26,781 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-11-12 17:27:26,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:27:26,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2018-11-12 17:27:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:27:26,806 INFO L225 Difference]: With dead ends: 844 [2018-11-12 17:27:26,807 INFO L226 Difference]: Without dead ends: 530 [2018-11-12 17:27:26,815 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:27:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-11-12 17:27:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-11-12 17:27:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-11-12 17:27:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-11-12 17:27:26,911 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 169 [2018-11-12 17:27:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:27:26,913 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-11-12 17:27:26,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:27:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-11-12 17:27:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-11-12 17:27:26,920 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:27:26,920 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] [2018-11-12 17:27:26,921 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:27:26,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:26,921 INFO L82 PathProgramCache]: Analyzing trace with hash 15466080, now seen corresponding path program 1 times [2018-11-12 17:27:26,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:27:26,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:26,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:26,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:26,923 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:27:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:27,429 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 17:27:27,429 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:27:27,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 17:27:27,430 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:27:27,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 17:27:27,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 17:27:27,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:27:27,434 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-11-12 17:27:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:27:29,699 INFO L93 Difference]: Finished difference Result 1473 states and 2496 transitions. [2018-11-12 17:27:29,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 17:27:29,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 182 [2018-11-12 17:27:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:27:29,712 INFO L225 Difference]: With dead ends: 1473 [2018-11-12 17:27:29,712 INFO L226 Difference]: Without dead ends: 954 [2018-11-12 17:27:29,716 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 17:27:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2018-11-12 17:27:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 952. [2018-11-12 17:27:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-11-12 17:27:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1496 transitions. [2018-11-12 17:27:29,790 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1496 transitions. Word has length 182 [2018-11-12 17:27:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:27:29,791 INFO L480 AbstractCegarLoop]: Abstraction has 952 states and 1496 transitions. [2018-11-12 17:27:29,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 17:27:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1496 transitions. [2018-11-12 17:27:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-11-12 17:27:29,796 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:27:29,797 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 17:27:29,797 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:27:29,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1708917764, now seen corresponding path program 1 times [2018-11-12 17:27:29,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:27:29,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:29,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:29,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:29,803 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:27:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:27:30,256 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:27:30,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 17:27:30,257 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:27:30,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 17:27:30,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 17:27:30,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-12 17:27:30,258 INFO L87 Difference]: Start difference. First operand 952 states and 1496 transitions. Second operand 5 states. [2018-11-12 17:27:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:27:34,860 INFO L93 Difference]: Finished difference Result 4008 states and 6512 transitions. [2018-11-12 17:27:34,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-12 17:27:34,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 184 [2018-11-12 17:27:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:27:34,885 INFO L225 Difference]: With dead ends: 4008 [2018-11-12 17:27:34,885 INFO L226 Difference]: Without dead ends: 3062 [2018-11-12 17:27:34,893 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-12 17:27:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2018-11-12 17:27:35,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3052. [2018-11-12 17:27:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3052 states. [2018-11-12 17:27:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4689 transitions. [2018-11-12 17:27:35,019 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4689 transitions. Word has length 184 [2018-11-12 17:27:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:27:35,020 INFO L480 AbstractCegarLoop]: Abstraction has 3052 states and 4689 transitions. [2018-11-12 17:27:35,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 17:27:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4689 transitions. [2018-11-12 17:27:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-12 17:27:35,033 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:27:35,033 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 17:27:35,033 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:27:35,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:35,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1523085736, now seen corresponding path program 1 times [2018-11-12 17:27:35,034 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:27:35,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:35,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:35,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:35,036 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:27:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:27:35,344 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:27:35,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 17:27:35,345 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:27:35,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 17:27:35,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 17:27:35,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 17:27:35,346 INFO L87 Difference]: Start difference. First operand 3052 states and 4689 transitions. Second operand 7 states. [2018-11-12 17:27:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:27:38,975 INFO L93 Difference]: Finished difference Result 9246 states and 16253 transitions. [2018-11-12 17:27:38,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 17:27:38,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 186 [2018-11-12 17:27:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:27:39,042 INFO L225 Difference]: With dead ends: 9246 [2018-11-12 17:27:39,042 INFO L226 Difference]: Without dead ends: 6200 [2018-11-12 17:27:39,059 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-12 17:27:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2018-11-12 17:27:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 5920. [2018-11-12 17:27:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5920 states. [2018-11-12 17:27:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5920 states to 5920 states and 9451 transitions. [2018-11-12 17:27:39,331 INFO L78 Accepts]: Start accepts. Automaton has 5920 states and 9451 transitions. Word has length 186 [2018-11-12 17:27:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:27:39,332 INFO L480 AbstractCegarLoop]: Abstraction has 5920 states and 9451 transitions. [2018-11-12 17:27:39,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 17:27:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5920 states and 9451 transitions. [2018-11-12 17:27:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-11-12 17:27:39,350 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:27:39,351 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 17:27:39,351 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:27:39,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1271032685, now seen corresponding path program 1 times [2018-11-12 17:27:39,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:27:39,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:39,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:39,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:39,353 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:27:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:39,611 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-12 17:27:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:27:39,814 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 17:27:39,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 17:27:39,814 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:27:39,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 17:27:39,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 17:27:39,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 17:27:39,815 INFO L87 Difference]: Start difference. First operand 5920 states and 9451 transitions. Second operand 6 states. [2018-11-12 17:27:43,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:27:43,180 INFO L93 Difference]: Finished difference Result 18028 states and 31530 transitions. [2018-11-12 17:27:43,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 17:27:43,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 187 [2018-11-12 17:27:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:27:43,295 INFO L225 Difference]: With dead ends: 18028 [2018-11-12 17:27:43,296 INFO L226 Difference]: Without dead ends: 12114 [2018-11-12 17:27:43,326 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 17:27:43,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12114 states. [2018-11-12 17:27:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12114 to 11840. [2018-11-12 17:27:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11840 states. [2018-11-12 17:27:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11840 states to 11840 states and 19227 transitions. [2018-11-12 17:27:43,837 INFO L78 Accepts]: Start accepts. Automaton has 11840 states and 19227 transitions. Word has length 187 [2018-11-12 17:27:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:27:43,838 INFO L480 AbstractCegarLoop]: Abstraction has 11840 states and 19227 transitions. [2018-11-12 17:27:43,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 17:27:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 11840 states and 19227 transitions. [2018-11-12 17:27:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-11-12 17:27:43,873 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:27:43,873 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 17:27:43,873 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:27:43,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:43,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1769410092, now seen corresponding path program 1 times [2018-11-12 17:27:43,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:27:43,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:43,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:27:43,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:27:43,876 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:27:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:27:44,438 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 17:27:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:27:44,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:27:44,673 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:27:44,674 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 200 with the following transitions: [2018-11-12 17:27:44,677 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [44], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:27:44,742 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:27:44,742 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:27:46,271 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:27:46,273 INFO L272 AbstractInterpreter]: Visited 170 different actions 170 times. Never merged. Never widened. Performed 3105 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3105 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 88 variables. [2018-11-12 17:27:46,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:27:46,317 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:27:47,606 INFO L227 lantSequenceWeakener]: Weakened 190 states. On average, predicates are now at 71.6% of their original sizes. [2018-11-12 17:27:47,607 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:27:48,851 INFO L415 sIntCurrentIteration]: We unified 198 AI predicates to 198 [2018-11-12 17:27:48,851 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:27:48,852 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:27:48,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [8] total 22 [2018-11-12 17:27:48,852 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:27:48,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 17:27:48,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 17:27:48,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2018-11-12 17:27:48,854 INFO L87 Difference]: Start difference. First operand 11840 states and 19227 transitions. Second operand 16 states. [2018-11-12 17:28:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:28:16,182 INFO L93 Difference]: Finished difference Result 23884 states and 38808 transitions. [2018-11-12 17:28:16,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 17:28:16,182 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 199 [2018-11-12 17:28:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:28:16,233 INFO L225 Difference]: With dead ends: 23884 [2018-11-12 17:28:16,234 INFO L226 Difference]: Without dead ends: 12050 [2018-11-12 17:28:16,268 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 201 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2018-11-12 17:28:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12050 states. [2018-11-12 17:28:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12050 to 12048. [2018-11-12 17:28:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12048 states. [2018-11-12 17:28:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12048 states to 12048 states and 19444 transitions. [2018-11-12 17:28:16,649 INFO L78 Accepts]: Start accepts. Automaton has 12048 states and 19444 transitions. Word has length 199 [2018-11-12 17:28:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:28:16,649 INFO L480 AbstractCegarLoop]: Abstraction has 12048 states and 19444 transitions. [2018-11-12 17:28:16,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-12 17:28:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 12048 states and 19444 transitions. [2018-11-12 17:28:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-11-12 17:28:16,683 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:28:16,684 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 17:28:16,684 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:28:16,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:28:16,684 INFO L82 PathProgramCache]: Analyzing trace with hash 515488759, now seen corresponding path program 1 times [2018-11-12 17:28:16,685 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:28:16,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:28:16,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:28:16,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:28:16,686 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:28:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:28:17,228 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 17:28:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:28:17,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:28:17,343 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:28:17,343 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 209 with the following transitions: [2018-11-12 17:28:17,344 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:28:17,354 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:28:17,354 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:28:19,306 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:28:19,306 INFO L272 AbstractInterpreter]: Visited 174 different actions 340 times. Merged at 4 different actions 4 times. Never widened. Performed 7843 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7843 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 17:28:19,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:28:19,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:28:19,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:28:19,317 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 17:28:19,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:28:19,329 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:28:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:28:19,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:28:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 17:28:19,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:28:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 17:28:20,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:28:20,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2018-11-12 17:28:20,681 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:28:20,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-12 17:28:20,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-12 17:28:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-12 17:28:20,683 INFO L87 Difference]: Start difference. First operand 12048 states and 19444 transitions. Second operand 8 states. [2018-11-12 17:28:21,651 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-12 17:28:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:28:29,626 INFO L93 Difference]: Finished difference Result 41321 states and 80839 transitions. [2018-11-12 17:28:29,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-12 17:28:29,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 208 [2018-11-12 17:28:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:28:29,829 INFO L225 Difference]: With dead ends: 41321 [2018-11-12 17:28:29,829 INFO L226 Difference]: Without dead ends: 29487 [2018-11-12 17:28:29,985 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 430 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2018-11-12 17:28:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29487 states. [2018-11-12 17:28:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29487 to 28552. [2018-11-12 17:28:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28552 states. [2018-11-12 17:28:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28552 states to 28552 states and 42359 transitions. [2018-11-12 17:28:31,351 INFO L78 Accepts]: Start accepts. Automaton has 28552 states and 42359 transitions. Word has length 208 [2018-11-12 17:28:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:28:31,351 INFO L480 AbstractCegarLoop]: Abstraction has 28552 states and 42359 transitions. [2018-11-12 17:28:31,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-12 17:28:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 28552 states and 42359 transitions. [2018-11-12 17:28:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-11-12 17:28:31,409 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:28:31,409 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 17:28:31,409 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:28:31,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:28:31,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1272963469, now seen corresponding path program 1 times [2018-11-12 17:28:31,410 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:28:31,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:28:31,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:28:31,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:28:31,411 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:28:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:28:31,688 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 17:28:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-12 17:28:32,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:28:32,102 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:28:32,103 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 224 with the following transitions: [2018-11-12 17:28:32,103 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [44], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:28:32,119 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:28:32,119 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:28:35,124 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:28:35,125 INFO L272 AbstractInterpreter]: Visited 174 different actions 344 times. Merged at 5 different actions 7 times. Never widened. Performed 11145 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11145 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 17:28:35,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:28:35,133 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:28:36,813 INFO L227 lantSequenceWeakener]: Weakened 51 states. On average, predicates are now at 78.18% of their original sizes. [2018-11-12 17:28:36,813 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:28:41,505 INFO L415 sIntCurrentIteration]: We unified 222 AI predicates to 222 [2018-11-12 17:28:41,506 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:28:41,506 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:28:41,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [6] total 25 [2018-11-12 17:28:41,507 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:28:41,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 17:28:41,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 17:28:41,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-11-12 17:28:41,508 INFO L87 Difference]: Start difference. First operand 28552 states and 42359 transitions. Second operand 21 states. [2018-11-12 17:29:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:29:29,640 INFO L93 Difference]: Finished difference Result 55707 states and 82933 transitions. [2018-11-12 17:29:29,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 17:29:29,640 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 223 [2018-11-12 17:29:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:29:29,728 INFO L225 Difference]: With dead ends: 55707 [2018-11-12 17:29:29,728 INFO L226 Difference]: Without dead ends: 27369 [2018-11-12 17:29:29,773 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 233 GetRequests, 154 SyntacticMatches, 49 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2018-11-12 17:29:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27369 states. [2018-11-12 17:29:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27369 to 27360. [2018-11-12 17:29:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27360 states. [2018-11-12 17:29:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 40309 transitions. [2018-11-12 17:29:30,452 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 40309 transitions. Word has length 223 [2018-11-12 17:29:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:29:30,453 INFO L480 AbstractCegarLoop]: Abstraction has 27360 states and 40309 transitions. [2018-11-12 17:29:30,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 17:29:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 40309 transitions. [2018-11-12 17:29:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-12 17:29:30,511 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:29:30,512 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2018-11-12 17:29:30,512 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:29:30,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:29:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1496366192, now seen corresponding path program 1 times [2018-11-12 17:29:30,518 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:29:30,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:29:30,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:29:30,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:29:30,520 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:29:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:29:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 94 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-11-12 17:29:30,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:29:31,000 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:29:31,000 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-11-12 17:29:31,000 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [45], [48], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:29:31,008 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:29:31,008 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:29:33,033 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:29:33,033 INFO L272 AbstractInterpreter]: Visited 176 different actions 344 times. Merged at 4 different actions 4 times. Never widened. Performed 7855 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7855 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 17:29:33,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:29:33,042 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:29:33,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:29:33,042 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 17:29:33,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:29:33,052 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:29:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:29:33,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:29:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 141 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-12 17:29:33,380 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:29:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 143 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-12 17:29:33,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:29:33,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-12 17:29:33,597 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:29:33,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 17:29:33,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 17:29:33,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-12 17:29:33,599 INFO L87 Difference]: Start difference. First operand 27360 states and 40309 transitions. Second operand 9 states. [2018-11-12 17:29:36,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:29:36,031 INFO L93 Difference]: Finished difference Result 44154 states and 64994 transitions. [2018-11-12 17:29:36,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-12 17:29:36,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 251 [2018-11-12 17:29:36,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:29:36,083 INFO L225 Difference]: With dead ends: 44154 [2018-11-12 17:29:36,084 INFO L226 Difference]: Without dead ends: 18392 [2018-11-12 17:29:36,132 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 501 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-11-12 17:29:36,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18392 states. [2018-11-12 17:29:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18392 to 15864. [2018-11-12 17:29:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15864 states. [2018-11-12 17:29:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15864 states to 15864 states and 19958 transitions. [2018-11-12 17:29:36,498 INFO L78 Accepts]: Start accepts. Automaton has 15864 states and 19958 transitions. Word has length 251 [2018-11-12 17:29:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:29:36,499 INFO L480 AbstractCegarLoop]: Abstraction has 15864 states and 19958 transitions. [2018-11-12 17:29:36,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 17:29:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 15864 states and 19958 transitions. [2018-11-12 17:29:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-11-12 17:29:36,513 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:29:36,513 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-11-12 17:29:36,513 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:29:36,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:29:36,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1460650671, now seen corresponding path program 1 times [2018-11-12 17:29:36,514 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:29:36,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:29:36,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:29:36,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:29:36,515 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:29:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:29:37,129 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 17:29:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 101 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-12 17:29:37,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:29:37,346 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:29:37,347 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 255 with the following transitions: [2018-11-12 17:29:37,347 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [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], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:29:37,353 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:29:37,353 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:29:40,419 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 17:29:40,419 INFO L272 AbstractInterpreter]: Visited 175 different actions 516 times. Merged at 7 different actions 14 times. Never widened. Performed 12651 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12651 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 17:29:40,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:29:40,423 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 17:29:40,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:29:40,423 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 17:29:40,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:29:40,434 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:29:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:29:40,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:29:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:29:41,163 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 17:29:41,408 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-12 17:29:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 24 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 17:29:41,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 17:29:41,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-11-12 17:29:41,984 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 17:29:41,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-12 17:29:41,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-12 17:29:41,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-11-12 17:29:41,986 INFO L87 Difference]: Start difference. First operand 15864 states and 19958 transitions. Second operand 12 states. [2018-11-12 17:29:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:29:54,987 INFO L93 Difference]: Finished difference Result 58102 states and 86411 transitions. [2018-11-12 17:29:54,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-11-12 17:29:54,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 254 [2018-11-12 17:29:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:29:55,228 INFO L225 Difference]: With dead ends: 58102 [2018-11-12 17:29:55,228 INFO L226 Difference]: Without dead ends: 43739 [2018-11-12 17:29:55,301 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 570 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3097 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1387, Invalid=7169, Unknown=0, NotChecked=0, Total=8556 [2018-11-12 17:29:55,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43739 states. [2018-11-12 17:29:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43739 to 39860. [2018-11-12 17:29:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39860 states. [2018-11-12 17:29:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39860 states to 39860 states and 50210 transitions. [2018-11-12 17:29:56,530 INFO L78 Accepts]: Start accepts. Automaton has 39860 states and 50210 transitions. Word has length 254 [2018-11-12 17:29:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:29:56,531 INFO L480 AbstractCegarLoop]: Abstraction has 39860 states and 50210 transitions. [2018-11-12 17:29:56,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-12 17:29:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 39860 states and 50210 transitions. [2018-11-12 17:29:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-11-12 17:29:56,554 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:29:56,554 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 17:29:56,554 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:29:56,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:29:56,555 INFO L82 PathProgramCache]: Analyzing trace with hash 753374301, now seen corresponding path program 1 times [2018-11-12 17:29:56,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:29:56,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:29:56,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:29:56,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:29:56,556 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:29:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:29:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 17:29:57,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:29:57,070 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:29:57,070 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 308 with the following transitions: [2018-11-12 17:29:57,071 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], [131], [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], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:29:57,076 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:29:57,076 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 17:29:58,832 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 17:29:58,832 INFO L272 AbstractInterpreter]: Visited 173 different actions 342 times. Merged at 5 different actions 7 times. Never widened. Performed 8891 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8891 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 17:29:58,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:29:58,844 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 17:30:00,055 INFO L227 lantSequenceWeakener]: Weakened 304 states. On average, predicates are now at 70.96% of their original sizes. [2018-11-12 17:30:00,055 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 17:30:00,409 INFO L415 sIntCurrentIteration]: We unified 306 AI predicates to 306 [2018-11-12 17:30:00,409 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 17:30:00,410 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 17:30:00,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-12 17:30:00,410 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 17:30:00,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 17:30:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 17:30:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-11-12 17:30:00,412 INFO L87 Difference]: Start difference. First operand 39860 states and 50210 transitions. Second operand 20 states. [2018-11-12 17:30:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 17:30:59,902 INFO L93 Difference]: Finished difference Result 81805 states and 104253 transitions. [2018-11-12 17:30:59,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-12 17:30:59,902 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 307 [2018-11-12 17:30:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 17:31:00,032 INFO L225 Difference]: With dead ends: 81805 [2018-11-12 17:31:00,032 INFO L226 Difference]: Without dead ends: 46974 [2018-11-12 17:31:00,087 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 315 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2018-11-12 17:31:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46974 states. [2018-11-12 17:31:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46974 to 46803. [2018-11-12 17:31:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46803 states. [2018-11-12 17:31:01,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46803 states to 46803 states and 58298 transitions. [2018-11-12 17:31:01,203 INFO L78 Accepts]: Start accepts. Automaton has 46803 states and 58298 transitions. Word has length 307 [2018-11-12 17:31:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 17:31:01,204 INFO L480 AbstractCegarLoop]: Abstraction has 46803 states and 58298 transitions. [2018-11-12 17:31:01,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 17:31:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 46803 states and 58298 transitions. [2018-11-12 17:31:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-11-12 17:31:01,228 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 17:31:01,229 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 17:31:01,229 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 17:31:01,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 17:31:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1369611910, now seen corresponding path program 1 times [2018-11-12 17:31:01,230 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 17:31:01,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:31:01,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:31:01,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 17:31:01,231 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 17:31:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:31:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 147 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 17:31:01,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:31:01,604 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 17:31:01,604 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 320 with the following transitions: [2018-11-12 17:31:01,605 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [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], [131], [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], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 17:31:01,609 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 17:31:01,609 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-11-12 17:31:03,576 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-12 17:31:03,577 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-12 17:31:03,577 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 17:31:03,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 17:31:03,577 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 17:31:03,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 17:31:03,585 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 17:31:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 17:31:03,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 17:31:03,828 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-12 17:31:04,029 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 17:31:04,029 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 17:31:04,035 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 17:31:04,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 05:31:04 BoogieIcfgContainer [2018-11-12 17:31:04,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 17:31:04,037 INFO L168 Benchmark]: Toolchain (without parser) took 227745.94 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 908.4 MB in the end (delta: 523.8 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-11-12 17:31:04,038 INFO L168 Benchmark]: CDTParser took 0.22 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 17:31:04,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1293.36 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 17:31:04,039 INFO L168 Benchmark]: Boogie Procedure Inliner took 237.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 735.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -860.4 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2018-11-12 17:31:04,040 INFO L168 Benchmark]: Boogie Preprocessor took 142.42 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 17:31:04,040 INFO L168 Benchmark]: RCFGBuilder took 5441.62 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: 254.7 MB). Peak memory consumption was 254.7 MB. Max. memory is 7.1 GB. [2018-11-12 17:31:04,041 INFO L168 Benchmark]: TraceAbstraction took 220626.72 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 908.4 MB in the end (delta: 1.0 GB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2018-11-12 17:31:04,046 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1293.36 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 237.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 735.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -860.4 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.42 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 5441.62 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: 254.7 MB). Peak memory consumption was 254.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220626.72 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 908.4 MB in the end (delta: 1.0 GB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1521]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1521). Cancelled while BasicCegarLoop was analyzing trace of length 320 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 9 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 220.5s OverallTime, 12 OverallIterations, 5 TraceHistogramMax, 176.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2945 SDtfs, 23798 SDslu, 3703 SDs, 0 SdLazy, 27769 SolverSat, 5940 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 112.2s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 2438 GetRequests, 2137 SyntacticMatches, 63 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4037 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46803occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 15.5s AbstIntTime, 7 AbstIntIterations, 3 AbstIntStrong, 0.9990372633221354 AbsIntWeakeningRatio, 0.2727272727272727 AbsIntAvgWeakeningVarsNumRemoved, 51.900826446280995 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 8095 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 3063 NumberOfCodeBlocks, 3063 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 3759 ConstructedInterpolants, 0 QuantifiedInterpolants, 2060770 SizeOfPredicates, 9 NumberOfNonLiveVariables, 3652 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 1292/1418 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown