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_label22_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:52:33,325 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:52:33,331 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:52:33,354 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:52:33,354 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:52:33,355 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:52:33,358 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:52:33,361 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:52:33,363 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:52:33,364 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:52:33,365 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:52:33,365 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:52:33,366 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:52:33,377 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:52:33,379 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:52:33,380 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:52:33,381 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:52:33,382 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:52:33,387 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:52:33,392 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:52:33,393 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:52:33,395 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:52:33,400 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:52:33,400 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:52:33,400 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:52:33,401 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:52:33,402 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:52:33,404 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:52:33,405 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:52:33,406 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:52:33,406 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:52:33,407 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:52:33,407 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:52:33,407 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:52:33,410 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:52:33,411 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:52:33,411 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 [2018-11-07 18:52:33,438 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:52:33,439 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:52:33,439 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:52:33,440 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:52:33,440 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:52:33,441 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:52:33,441 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:52:33,441 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:52:33,441 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:52:33,442 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:52:33,442 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:52:33,443 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:52:33,443 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:52:33,444 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:52:33,444 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:52:33,444 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:52:33,445 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:52:33,446 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:52:33,446 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:52:33,446 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:52:33,447 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:52:33,447 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:52:33,447 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:52:33,447 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:52:33,447 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:52:33,448 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:52:33,448 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:52:33,448 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:52:33,449 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:52:33,449 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:52:33,449 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:52:33,449 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:52:33,449 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:52:33,450 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:52:33,451 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:52:33,518 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:52:33,536 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:52:33,541 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:52:33,542 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:52:33,543 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:52:33,544 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label22_true-unreach-call.c [2018-11-07 18:52:33,613 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0728ea7c7/8e813f5677b048d989b2b31cfba60d4e/FLAG74e5c0f21 [2018-11-07 18:52:34,326 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:52:34,327 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label22_true-unreach-call.c [2018-11-07 18:52:34,349 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0728ea7c7/8e813f5677b048d989b2b31cfba60d4e/FLAG74e5c0f21 [2018-11-07 18:52:34,364 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0728ea7c7/8e813f5677b048d989b2b31cfba60d4e [2018-11-07 18:52:34,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:52:34,378 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:52:34,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:52:34,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:52:34,384 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:52:34,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:52:34" (1/1) ... [2018-11-07 18:52:34,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c1ffad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:34, skipping insertion in model container [2018-11-07 18:52:34,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:52:34" (1/1) ... [2018-11-07 18:52:34,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:52:34,500 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:52:35,216 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:52:35,221 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:52:35,524 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:52:35,550 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:52:35,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35 WrapperNode [2018-11-07 18:52:35,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:52:35,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:52:35,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:52:35,552 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:52:35,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (1/1) ... [2018-11-07 18:52:35,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (1/1) ... [2018-11-07 18:52:35,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:52:35,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:52:35,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:52:35,797 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:52:35,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (1/1) ... [2018-11-07 18:52:35,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (1/1) ... [2018-11-07 18:52:35,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (1/1) ... [2018-11-07 18:52:35,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (1/1) ... [2018-11-07 18:52:35,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (1/1) ... [2018-11-07 18:52:35,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (1/1) ... [2018-11-07 18:52:35,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (1/1) ... [2018-11-07 18:52:35,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:52:35,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:52:35,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:52:35,976 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:52:35,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (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 [2018-11-07 18:52:36,052 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:52:36,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:52:36,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:52:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:52:36,053 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:52:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:52:36,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:52:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:52:36,054 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:52:41,585 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:52:41,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:52:41 BoogieIcfgContainer [2018-11-07 18:52:41,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:52:41,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:52:41,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:52:41,590 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:52:41,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:52:34" (1/3) ... [2018-11-07 18:52:41,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb8dcc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:52:41, skipping insertion in model container [2018-11-07 18:52:41,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35" (2/3) ... [2018-11-07 18:52:41,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb8dcc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:52:41, skipping insertion in model container [2018-11-07 18:52:41,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:52:41" (3/3) ... [2018-11-07 18:52:41,595 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label22_true-unreach-call.c [2018-11-07 18:52:41,606 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:52:41,616 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:52:41,635 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:52:41,677 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:52:41,678 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:52:41,678 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:52:41,678 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:52:41,678 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:52:41,678 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:52:41,679 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:52:41,679 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:52:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 18:52:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-07 18:52:41,739 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:41,740 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:52:41,743 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:41,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:41,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1705983263, now seen corresponding path program 1 times [2018-11-07 18:52:41,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:41,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:41,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:41,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:41,817 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:42,768 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:52:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:42,972 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:42,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:52:42,973 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:42,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:52:42,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:52:42,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:52:43,000 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-11-07 18:52:45,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:45,177 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-11-07 18:52:45,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:52:45,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 174 [2018-11-07 18:52:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:45,207 INFO L225 Difference]: With dead ends: 838 [2018-11-07 18:52:45,207 INFO L226 Difference]: Without dead ends: 524 [2018-11-07 18:52:45,222 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 [2018-11-07 18:52:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-11-07 18:52:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-11-07 18:52:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-11-07 18:52:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-11-07 18:52:45,345 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 174 [2018-11-07 18:52:45,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:45,347 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-11-07 18:52:45,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:52:45,348 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-11-07 18:52:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-11-07 18:52:45,359 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:45,363 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:52:45,364 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:45,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:45,364 INFO L82 PathProgramCache]: Analyzing trace with hash 458519048, now seen corresponding path program 1 times [2018-11-07 18:52:45,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:45,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:45,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:45,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:45,366 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:45,686 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:45,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:52:45,686 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:45,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:52:45,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:52:45,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:52:45,689 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-11-07 18:52:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:49,546 INFO L93 Difference]: Finished difference Result 1581 states and 2759 transitions. [2018-11-07 18:52:49,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:52:49,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 184 [2018-11-07 18:52:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:49,574 INFO L225 Difference]: With dead ends: 1581 [2018-11-07 18:52:49,575 INFO L226 Difference]: Without dead ends: 1065 [2018-11-07 18:52:49,577 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:52:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-11-07 18:52:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1023. [2018-11-07 18:52:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-11-07 18:52:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1733 transitions. [2018-11-07 18:52:49,640 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1733 transitions. Word has length 184 [2018-11-07 18:52:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:49,641 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 1733 transitions. [2018-11-07 18:52:49,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:52:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1733 transitions. [2018-11-07 18:52:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-11-07 18:52:49,647 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:49,650 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:52:49,650 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:49,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash 12780901, now seen corresponding path program 1 times [2018-11-07 18:52:49,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:49,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:49,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:49,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:49,653 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:50,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:50,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:52:50,006 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:50,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:52:50,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:52:50,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:52:50,007 INFO L87 Difference]: Start difference. First operand 1023 states and 1733 transitions. Second operand 3 states. [2018-11-07 18:52:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:55,669 INFO L93 Difference]: Finished difference Result 2887 states and 5063 transitions. [2018-11-07 18:52:55,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:52:55,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2018-11-07 18:52:55,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:55,686 INFO L225 Difference]: With dead ends: 2887 [2018-11-07 18:52:55,686 INFO L226 Difference]: Without dead ends: 1870 [2018-11-07 18:52:55,691 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:52:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2018-11-07 18:52:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1865. [2018-11-07 18:52:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1865 states. [2018-11-07 18:52:55,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 3055 transitions. [2018-11-07 18:52:55,771 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 3055 transitions. Word has length 187 [2018-11-07 18:52:55,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:55,772 INFO L480 AbstractCegarLoop]: Abstraction has 1865 states and 3055 transitions. [2018-11-07 18:52:55,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:52:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 3055 transitions. [2018-11-07 18:52:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-11-07 18:52:55,781 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:55,781 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:52:55,782 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:55,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:55,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1985831946, now seen corresponding path program 1 times [2018-11-07 18:52:55,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:55,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:55,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:55,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:55,784 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:56,091 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:56,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:52:56,092 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:56,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:52:56,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:52:56,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:52:56,093 INFO L87 Difference]: Start difference. First operand 1865 states and 3055 transitions. Second operand 3 states. [2018-11-07 18:52:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:57,539 INFO L93 Difference]: Finished difference Result 5422 states and 9195 transitions. [2018-11-07 18:52:57,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:52:57,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2018-11-07 18:52:57,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:57,570 INFO L225 Difference]: With dead ends: 5422 [2018-11-07 18:52:57,570 INFO L226 Difference]: Without dead ends: 3563 [2018-11-07 18:52:57,581 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:52:57,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2018-11-07 18:52:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3541. [2018-11-07 18:52:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3541 states. [2018-11-07 18:52:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5808 transitions. [2018-11-07 18:52:57,717 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5808 transitions. Word has length 207 [2018-11-07 18:52:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:57,718 INFO L480 AbstractCegarLoop]: Abstraction has 3541 states and 5808 transitions. [2018-11-07 18:52:57,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:52:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5808 transitions. [2018-11-07 18:52:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-11-07 18:52:57,738 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:57,739 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:52:57,739 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:57,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:57,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1023448885, now seen corresponding path program 1 times [2018-11-07 18:52:57,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:57,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:57,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:57,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:57,741 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:58,173 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 18:52:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:58,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:58,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-07 18:52:58,593 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:58,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:52:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:52:58,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:52:58,594 INFO L87 Difference]: Start difference. First operand 3541 states and 5808 transitions. Second operand 7 states. [2018-11-07 18:53:02,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:53:02,732 INFO L93 Difference]: Finished difference Result 15784 states and 30060 transitions. [2018-11-07 18:53:02,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 18:53:02,740 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 252 [2018-11-07 18:53:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:53:02,868 INFO L225 Difference]: With dead ends: 15784 [2018-11-07 18:53:02,868 INFO L226 Difference]: Without dead ends: 12249 [2018-11-07 18:53:02,907 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-11-07 18:53:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12249 states. [2018-11-07 18:53:03,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12249 to 11635. [2018-11-07 18:53:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11635 states. [2018-11-07 18:53:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 19720 transitions. [2018-11-07 18:53:03,419 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 19720 transitions. Word has length 252 [2018-11-07 18:53:03,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:53:03,419 INFO L480 AbstractCegarLoop]: Abstraction has 11635 states and 19720 transitions. [2018-11-07 18:53:03,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:53:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 19720 transitions. [2018-11-07 18:53:03,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-11-07 18:53:03,492 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:53:03,492 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:53:03,493 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:53:03,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:03,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1457202219, now seen corresponding path program 1 times [2018-11-07 18:53:03,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:53:03,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:03,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:03,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:03,495 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:53:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:04,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:53:04,097 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:53:04,098 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 268 with the following transitions: [2018-11-07 18:53:04,101 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [36], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [315], [318], [322], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [853], [855], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:53:04,166 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:53:04,166 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:53:07,453 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:53:07,455 INFO L272 AbstractInterpreter]: Visited 178 different actions 350 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:53:07,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:07,498 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:53:09,853 INFO L227 lantSequenceWeakener]: Weakened 262 states. On average, predicates are now at 71.51% of their original sizes. [2018-11-07 18:53:09,853 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:53:10,675 INFO L415 sIntCurrentIteration]: We unified 266 AI predicates to 266 [2018-11-07 18:53:10,676 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:53:10,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:53:10,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [6] total 19 [2018-11-07 18:53:10,677 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:53:10,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 18:53:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 18:53:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:53:10,678 INFO L87 Difference]: Start difference. First operand 11635 states and 19720 transitions. Second operand 15 states. [2018-11-07 18:53:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:53:53,793 INFO L93 Difference]: Finished difference Result 24532 states and 41099 transitions. [2018-11-07 18:53:53,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 18:53:53,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 267 [2018-11-07 18:53:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:53:53,860 INFO L225 Difference]: With dead ends: 24532 [2018-11-07 18:53:53,860 INFO L226 Difference]: Without dead ends: 12903 [2018-11-07 18:53:53,912 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 270 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:53:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12903 states. [2018-11-07 18:53:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12903 to 12863. [2018-11-07 18:53:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12863 states. [2018-11-07 18:53:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12863 states to 12863 states and 20564 transitions. [2018-11-07 18:53:54,319 INFO L78 Accepts]: Start accepts. Automaton has 12863 states and 20564 transitions. Word has length 267 [2018-11-07 18:53:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:53:54,320 INFO L480 AbstractCegarLoop]: Abstraction has 12863 states and 20564 transitions. [2018-11-07 18:53:54,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 18:53:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 12863 states and 20564 transitions. [2018-11-07 18:53:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-11-07 18:53:54,375 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:53:54,375 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:53:54,375 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:53:54,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash 86729562, now seen corresponding path program 1 times [2018-11-07 18:53:54,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:53:54,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:54,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:54,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:54,378 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:53:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:54,969 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 18:53:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:55,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:53:55,212 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:53:55,212 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 275 with the following transitions: [2018-11-07 18:53:55,213 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [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], [315], [318], [322], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [853], [855], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:53:55,229 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:53:55,230 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:53:58,215 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:53:58,215 INFO L272 AbstractInterpreter]: Visited 181 different actions 535 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 18:53:58,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:58,224 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:53:58,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:53:58,224 INFO L194 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 [2018-11-07 18:53:58,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:58,237 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:53:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:58,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:53:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:53:58,740 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:53:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:53:59,297 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:53:59,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 18:53:59,298 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:53:59,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:53:59,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:53:59,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:53:59,299 INFO L87 Difference]: Start difference. First operand 12863 states and 20564 transitions. Second operand 3 states. [2018-11-07 18:54:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:54:03,078 INFO L93 Difference]: Finished difference Result 35702 states and 59014 transitions. [2018-11-07 18:54:03,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:54:03,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 274 [2018-11-07 18:54:03,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:54:03,214 INFO L225 Difference]: With dead ends: 35702 [2018-11-07 18:54:03,215 INFO L226 Difference]: Without dead ends: 23053 [2018-11-07 18:54:03,285 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 546 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:54:03,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23053 states. [2018-11-07 18:54:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23053 to 22761. [2018-11-07 18:54:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22761 states. [2018-11-07 18:54:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22761 states to 22761 states and 35465 transitions. [2018-11-07 18:54:04,158 INFO L78 Accepts]: Start accepts. Automaton has 22761 states and 35465 transitions. Word has length 274 [2018-11-07 18:54:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:54:04,158 INFO L480 AbstractCegarLoop]: Abstraction has 22761 states and 35465 transitions. [2018-11-07 18:54:04,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:54:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 22761 states and 35465 transitions. [2018-11-07 18:54:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-11-07 18:54:04,239 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:54:04,239 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:54:04,239 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:54:04,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:54:04,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1188279711, now seen corresponding path program 1 times [2018-11-07 18:54:04,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:54:04,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:54:04,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:54:04,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:54:04,241 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:54:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:54:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-07 18:54:04,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:54:04,906 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:54:04,907 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 299 with the following transitions: [2018-11-07 18:54:04,907 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], [115], [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], [334], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [853], [855], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:54:04,930 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:54:04,930 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:54:07,295 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:54:07,295 INFO L272 AbstractInterpreter]: Visited 179 different actions 354 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:54:07,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:54:07,333 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:54:09,886 INFO L227 lantSequenceWeakener]: Weakened 119 states. On average, predicates are now at 74.26% of their original sizes. [2018-11-07 18:54:09,886 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:54:16,894 INFO L415 sIntCurrentIteration]: We unified 297 AI predicates to 297 [2018-11-07 18:54:16,894 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:54:16,895 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:54:16,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [6] total 27 [2018-11-07 18:54:16,895 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:54:16,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-07 18:54:16,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-07 18:54:16,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2018-11-07 18:54:16,897 INFO L87 Difference]: Start difference. First operand 22761 states and 35465 transitions. Second operand 23 states. [2018-11-07 18:55:16,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:55:16,535 INFO L93 Difference]: Finished difference Result 46987 states and 73214 transitions. [2018-11-07 18:55:16,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 18:55:16,535 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 298 [2018-11-07 18:55:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:55:16,631 INFO L225 Difference]: With dead ends: 46987 [2018-11-07 18:55:16,632 INFO L226 Difference]: Without dead ends: 24440 [2018-11-07 18:55:16,670 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 308 GetRequests, 194 SyntacticMatches, 82 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2018-11-07 18:55:16,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24440 states. [2018-11-07 18:55:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24440 to 24437. [2018-11-07 18:55:17,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24437 states. [2018-11-07 18:55:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24437 states to 24437 states and 37318 transitions. [2018-11-07 18:55:17,099 INFO L78 Accepts]: Start accepts. Automaton has 24437 states and 37318 transitions. Word has length 298 [2018-11-07 18:55:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:55:17,100 INFO L480 AbstractCegarLoop]: Abstraction has 24437 states and 37318 transitions. [2018-11-07 18:55:17,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-07 18:55:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 24437 states and 37318 transitions. [2018-11-07 18:55:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-11-07 18:55:17,142 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:55:17,142 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:55:17,142 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:55:17,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:17,143 INFO L82 PathProgramCache]: Analyzing trace with hash -393737575, now seen corresponding path program 1 times [2018-11-07 18:55:17,143 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:55:17,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:17,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:17,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:17,144 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:55:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:17,720 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 18:55:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 149 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:55:17,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:17,965 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:55:17,965 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 310 with the following transitions: [2018-11-07 18:55:17,966 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [315], [318], [322], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [853], [855], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:55:17,972 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:55:17,972 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:55:22,275 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:55:22,275 INFO L272 AbstractInterpreter]: Visited 182 different actions 722 times. Merged at 8 different actions 32 times. Never widened. Found 7 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 18:55:22,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:22,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:55:22,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:22,289 INFO L194 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 [2018-11-07 18:55:22,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:22,299 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:55:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:22,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:55:22,918 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:55:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-07 18:55:23,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:55:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 149 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:55:23,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:55:23,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2018-11-07 18:55:23,520 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:55:23,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:55:23,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:55:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:55:23,521 INFO L87 Difference]: Start difference. First operand 24437 states and 37318 transitions. Second operand 10 states. [2018-11-07 18:55:30,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:55:30,143 INFO L93 Difference]: Finished difference Result 65867 states and 110938 transitions. [2018-11-07 18:55:30,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-07 18:55:30,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 309 [2018-11-07 18:55:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:55:30,412 INFO L225 Difference]: With dead ends: 65867 [2018-11-07 18:55:30,412 INFO L226 Difference]: Without dead ends: 43320 [2018-11-07 18:55:30,522 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2018-11-07 18:55:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43320 states. [2018-11-07 18:55:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43320 to 42215. [2018-11-07 18:55:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42215 states. [2018-11-07 18:55:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42215 states to 42215 states and 58234 transitions. [2018-11-07 18:55:31,532 INFO L78 Accepts]: Start accepts. Automaton has 42215 states and 58234 transitions. Word has length 309 [2018-11-07 18:55:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:55:31,533 INFO L480 AbstractCegarLoop]: Abstraction has 42215 states and 58234 transitions. [2018-11-07 18:55:31,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:55:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 42215 states and 58234 transitions. [2018-11-07 18:55:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-11-07 18:55:31,588 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:55:31,588 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:55:31,588 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:55:31,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1418709675, now seen corresponding path program 1 times [2018-11-07 18:55:31,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:55:31,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:31,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:31,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:31,590 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:55:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 155 proven. 37 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:55:31,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:31,947 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:55:31,947 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 314 with the following transitions: [2018-11-07 18:55:31,947 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [135], [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], [334], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [853], [855], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:55:31,953 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:55:31,953 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:55:34,150 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:55:34,150 INFO L272 AbstractInterpreter]: Visited 179 different actions 354 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:55:34,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:34,158 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:55:35,525 INFO L227 lantSequenceWeakener]: Weakened 310 states. On average, predicates are now at 71.25% of their original sizes. [2018-11-07 18:55:35,525 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:55:35,847 INFO L415 sIntCurrentIteration]: We unified 312 AI predicates to 312 [2018-11-07 18:55:35,847 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:55:35,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:55:35,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-11-07 18:55:35,848 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:55:35,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:55:35,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:55:35,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-11-07 18:55:35,850 INFO L87 Difference]: Start difference. First operand 42215 states and 58234 transitions. Second operand 17 states. Received shutdown request... [2018-11-07 18:56:17,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:56:17,097 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:56:17,102 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:56:17,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:56:17 BoogieIcfgContainer [2018-11-07 18:56:17,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:56:17,103 INFO L168 Benchmark]: Toolchain (without parser) took 222726.61 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 629.2 MB in the end (delta: 789.9 MB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. [2018-11-07 18:56:17,104 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:56:17,105 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1172.41 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-11-07 18:56:17,106 INFO L168 Benchmark]: Boogie Procedure Inliner took 245.02 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -883.7 MB). Peak memory consumption was 39.7 MB. Max. memory is 7.1 GB. [2018-11-07 18:56:17,106 INFO L168 Benchmark]: Boogie Preprocessor took 178.48 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2018-11-07 18:56:17,107 INFO L168 Benchmark]: RCFGBuilder took 5609.78 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 267.6 MB). Peak memory consumption was 267.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:56:17,108 INFO L168 Benchmark]: TraceAbstraction took 215515.80 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 629.2 MB in the end (delta: 1.3 GB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-11-07 18:56:17,113 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1172.41 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 245.02 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -883.7 MB). Peak memory consumption was 39.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 178.48 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5609.78 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 267.6 MB). Peak memory consumption was 267.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215515.80 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 629.2 MB in the end (delta: 1.3 GB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1536]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1536). Cancelled while BasicCegarLoop was constructing difference of abstraction (42215states) and FLOYD_HOARE automaton (currently 14 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (12208 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 215.4s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 172.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2452 SDtfs, 12397 SDslu, 2543 SDs, 0 SdLazy, 19793 SolverSat, 2821 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 109.3s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 2140 GetRequests, 1929 SyntacticMatches, 88 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 12.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42215occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 15.3s AbstIntTime, 5 AbstIntIterations, 3 AbstIntStrong, 0.9990296753184029 AbsIntWeakeningRatio, 0.2377142857142857 AbsIntAvgWeakeningVarsNumRemoved, 50.55885714285714 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.6s AutomataMinimizationTime, 9 MinimizatonAttempts, 2125 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 3048 NumberOfCodeBlocks, 3048 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 3617 ConstructedInterpolants, 0 QuantifiedInterpolants, 2728021 SizeOfPredicates, 14 NumberOfNonLiveVariables, 2377 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 1442/1555 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown