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_label23_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:52:33,773 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:52:33,775 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:52:33,788 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:52:33,788 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:52:33,791 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:52:33,792 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:52:33,794 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:52:33,796 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:52:33,797 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:52:33,798 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:52:33,798 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:52:33,801 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:52:33,802 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:52:33,807 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:52:33,808 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:52:33,809 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:52:33,810 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:52:33,812 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:52:33,814 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:52:33,815 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:52:33,816 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:52:33,818 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:52:33,818 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:52:33,819 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:52:33,819 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:52:33,820 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:52:33,821 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:52:33,822 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:52:33,825 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:52:33,826 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:52:33,827 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:52:33,828 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:52:33,828 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:52:33,829 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:52:33,831 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:52:33,831 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 18:52:33,862 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:52:33,862 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:52:33,863 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:52:33,863 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:52:33,863 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:52:33,863 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:52:33,864 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:52:33,864 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:52:33,864 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:52:33,865 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:52:33,865 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:52:33,865 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:52:33,865 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:52:33,866 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:52:33,866 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:52:33,866 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:52:33,866 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:52:33,868 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:52:33,868 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:52:33,868 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:52:33,868 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:52:33,869 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:52:33,869 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:52:33,869 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:52:33,869 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:52:33,869 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:52:33,870 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:52:33,870 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:52:33,870 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:52:33,870 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:52:33,871 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:52:33,871 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:52:33,871 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:52:33,871 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:52:33,871 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:52:33,933 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:52:33,949 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:52:33,954 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:52:33,955 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:52:33,956 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:52:33,957 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label23_true-unreach-call.c [2018-11-07 18:52:34,029 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d41aaf1/b3811643215b40c5814c244711126bff/FLAG41a8cccd4 [2018-11-07 18:52:34,746 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:52:34,747 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label23_true-unreach-call.c [2018-11-07 18:52:34,770 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d41aaf1/b3811643215b40c5814c244711126bff/FLAG41a8cccd4 [2018-11-07 18:52:34,792 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d41aaf1/b3811643215b40c5814c244711126bff [2018-11-07 18:52:34,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:52:34,807 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:52:34,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:52:34,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:52:34,812 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:52:34,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:52:34" (1/1) ... [2018-11-07 18:52:34,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b23081d 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 18:52:34,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:52:34" (1/1) ... [2018-11-07 18:52:34,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:52:34,917 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:52:35,634 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:52:35,643 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:52:35,952 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:52:35,977 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:52:35,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:52:35 WrapperNode [2018-11-07 18:52:35,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:52:35,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:52:35,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:52:35,979 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:52:35,990 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 18:52:36,172 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 18:52:36,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:52:36,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:52:36,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:52:36,188 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:52:36,199 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 18:52:36,199 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 18:52:36,206 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 18:52:36,206 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 18:52:36,273 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 18:52:36,288 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 18:52:36,305 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 18:52:36,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:52:36,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:52:36,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:52:36,322 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:52:36,323 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 18:52:36,400 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:52:36,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:52:36,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:52:36,401 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:52:36,401 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:52:36,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:52:36,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:52:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:52:36,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:52:41,484 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:52:41,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:52:41 BoogieIcfgContainer [2018-11-07 18:52:41,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:52:41,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:52:41,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:52:41,490 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:52:41,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:52:34" (1/3) ... [2018-11-07 18:52:41,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271e78bd 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 18:52:41,492 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 18:52:41,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271e78bd 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 18:52:41,493 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 18:52:41,495 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label23_true-unreach-call.c [2018-11-07 18:52:41,507 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:52:41,517 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:52:41,536 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:52:41,576 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:52:41,576 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:52:41,576 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:52:41,576 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:52:41,576 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:52:41,577 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:52:41,577 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:52:41,577 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:52:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 18:52:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-07 18:52:41,632 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:41,633 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:52:41,636 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:41,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:41,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1250104911, now seen corresponding path program 1 times [2018-11-07 18:52:41,646 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:41,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:41,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:41,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:41,698 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:42,832 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 18:52:42,835 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:42,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:52:42,836 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:42,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:52:42,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:52:42,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:52:42,862 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-07 18:52:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:46,228 INFO L93 Difference]: Finished difference Result 1084 states and 1945 transitions. [2018-11-07 18:52:46,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:52:46,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2018-11-07 18:52:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:46,259 INFO L225 Difference]: With dead ends: 1084 [2018-11-07 18:52:46,260 INFO L226 Difference]: Without dead ends: 766 [2018-11-07 18:52:46,272 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:52:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2018-11-07 18:52:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 524. [2018-11-07 18:52:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2018-11-07 18:52:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 918 transitions. [2018-11-07 18:52:46,366 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 918 transitions. Word has length 178 [2018-11-07 18:52:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:46,368 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 918 transitions. [2018-11-07 18:52:46,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:52:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 918 transitions. [2018-11-07 18:52:46,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-07 18:52:46,376 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:46,376 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:52:46,376 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:46,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:46,377 INFO L82 PathProgramCache]: Analyzing trace with hash -217139872, now seen corresponding path program 1 times [2018-11-07 18:52:46,377 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:46,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:46,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:46,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:46,379 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:46,676 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:52:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:46,750 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:46,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 18:52:46,750 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:46,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 18:52:46,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 18:52:46,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 18:52:46,753 INFO L87 Difference]: Start difference. First operand 524 states and 918 transitions. Second operand 5 states. [2018-11-07 18:52:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:49,545 INFO L93 Difference]: Finished difference Result 1614 states and 2930 transitions. [2018-11-07 18:52:49,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:52:49,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2018-11-07 18:52:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:49,563 INFO L225 Difference]: With dead ends: 1614 [2018-11-07 18:52:49,563 INFO L226 Difference]: Without dead ends: 1096 [2018-11-07 18:52:49,567 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:52:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2018-11-07 18:52:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1073. [2018-11-07 18:52:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2018-11-07 18:52:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1769 transitions. [2018-11-07 18:52:49,645 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1769 transitions. Word has length 189 [2018-11-07 18:52:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:49,646 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 1769 transitions. [2018-11-07 18:52:49,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 18:52:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1769 transitions. [2018-11-07 18:52:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-07 18:52:49,651 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:49,653 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:52:49,653 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:49,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1010977333, now seen corresponding path program 1 times [2018-11-07 18:52:49,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:49,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:49,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:49,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:49,656 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:50,007 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 18:52:50,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:50,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:52:50,008 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:50,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:52:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:52:50,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:52:50,009 INFO L87 Difference]: Start difference. First operand 1073 states and 1769 transitions. Second operand 3 states. [2018-11-07 18:52:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:52,365 INFO L93 Difference]: Finished difference Result 3100 states and 5252 transitions. [2018-11-07 18:52:52,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:52:52,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2018-11-07 18:52:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:52,389 INFO L225 Difference]: With dead ends: 3100 [2018-11-07 18:52:52,390 INFO L226 Difference]: Without dead ends: 2033 [2018-11-07 18:52:52,395 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 18:52:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2018-11-07 18:52:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2030. [2018-11-07 18:52:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2030 states. [2018-11-07 18:52:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 3203 transitions. [2018-11-07 18:52:52,501 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 3203 transitions. Word has length 191 [2018-11-07 18:52:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:52,502 INFO L480 AbstractCegarLoop]: Abstraction has 2030 states and 3203 transitions. [2018-11-07 18:52:52,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:52:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 3203 transitions. [2018-11-07 18:52:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-11-07 18:52:52,511 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:52,512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:52:52,512 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:52,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1402232081, now seen corresponding path program 1 times [2018-11-07 18:52:52,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:52,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:52,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:52,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:52,515 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:52,918 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-11-07 18:52:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:53,013 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:52:53,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:52:53,013 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:52:53,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:52:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:52:53,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:52:53,015 INFO L87 Difference]: Start difference. First operand 2030 states and 3203 transitions. Second operand 6 states. [2018-11-07 18:52:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:52:56,329 INFO L93 Difference]: Finished difference Result 5883 states and 9834 transitions. [2018-11-07 18:52:56,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:52:56,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 193 [2018-11-07 18:52:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:52:56,360 INFO L225 Difference]: With dead ends: 5883 [2018-11-07 18:52:56,360 INFO L226 Difference]: Without dead ends: 3859 [2018-11-07 18:52:56,370 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:52:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2018-11-07 18:52:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 3792. [2018-11-07 18:52:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3792 states. [2018-11-07 18:52:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 5638 transitions. [2018-11-07 18:52:56,512 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 5638 transitions. Word has length 193 [2018-11-07 18:52:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:52:56,513 INFO L480 AbstractCegarLoop]: Abstraction has 3792 states and 5638 transitions. [2018-11-07 18:52:56,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:52:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 5638 transitions. [2018-11-07 18:52:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-11-07 18:52:56,523 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:52:56,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:52:56,524 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:52:56,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash 943603689, now seen corresponding path program 1 times [2018-11-07 18:52:56,525 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:52:56,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:56,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:52:56,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:52:56,527 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:52:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:52:57,061 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:52:57,421 WARN L179 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 18:52:57,688 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 18:52:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:52:57,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:52:57,721 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:52:57,722 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 209 with the following transitions: [2018-11-07 18:52:57,724 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], [817], [825], [833], [841], [849], [857], [865], [873], [881], [885], [887], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:52:57,786 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:52:57,786 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:52:59,253 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:52:59,254 INFO L272 AbstractInterpreter]: Visited 179 different actions 179 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 18:52:59,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:52:59,287 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:53:00,726 INFO L227 lantSequenceWeakener]: Weakened 199 states. On average, predicates are now at 72.47% of their original sizes. [2018-11-07 18:53:00,726 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:53:02,583 INFO L415 sIntCurrentIteration]: We unified 207 AI predicates to 207 [2018-11-07 18:53:02,584 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:53:02,587 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:53:02,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [8] total 22 [2018-11-07 18:53:02,588 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:53:02,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 18:53:02,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 18:53:02,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:53:02,590 INFO L87 Difference]: Start difference. First operand 3792 states and 5638 transitions. Second operand 16 states. [2018-11-07 18:53:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:53:31,645 INFO L93 Difference]: Finished difference Result 7788 states and 11545 transitions. [2018-11-07 18:53:31,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:53:31,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 208 [2018-11-07 18:53:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:53:31,665 INFO L225 Difference]: With dead ends: 7788 [2018-11-07 18:53:31,665 INFO L226 Difference]: Without dead ends: 4002 [2018-11-07 18:53:31,678 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 210 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:53:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2018-11-07 18:53:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 4000. [2018-11-07 18:53:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4000 states. [2018-11-07 18:53:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4000 states to 4000 states and 5855 transitions. [2018-11-07 18:53:31,772 INFO L78 Accepts]: Start accepts. Automaton has 4000 states and 5855 transitions. Word has length 208 [2018-11-07 18:53:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:53:31,773 INFO L480 AbstractCegarLoop]: Abstraction has 4000 states and 5855 transitions. [2018-11-07 18:53:31,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 18:53:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4000 states and 5855 transitions. [2018-11-07 18:53:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-07 18:53:31,783 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:53:31,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:53:31,784 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:53:31,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:31,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1528109442, now seen corresponding path program 1 times [2018-11-07 18:53:31,784 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:53:31,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:31,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:31,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:31,786 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:53:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:32,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:53:32,034 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:53:32,034 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-11-07 18:53:32,035 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], [817], [825], [833], [841], [849], [857], [865], [873], [881], [885], [887], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:53:32,043 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:53:32,043 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:53:34,518 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:53:34,518 INFO L272 AbstractInterpreter]: Visited 183 different actions 361 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 18:53:34,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:34,526 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:53:34,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:53:34,526 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 18:53:34,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:34,540 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:53:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:34,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:53:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:35,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:53:35,937 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:53:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:36,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:53:36,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2018-11-07 18:53:36,245 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:53:36,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 18:53:36,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 18:53:36,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:53:36,247 INFO L87 Difference]: Start difference. First operand 4000 states and 5855 transitions. Second operand 12 states. [2018-11-07 18:53:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:53:48,317 INFO L93 Difference]: Finished difference Result 24689 states and 40439 transitions. [2018-11-07 18:53:48,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-11-07 18:53:48,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 217 [2018-11-07 18:53:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:53:48,459 INFO L225 Difference]: With dead ends: 24689 [2018-11-07 18:53:48,459 INFO L226 Difference]: Without dead ends: 20903 [2018-11-07 18:53:48,514 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1336, Invalid=7220, Unknown=0, NotChecked=0, Total=8556 [2018-11-07 18:53:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20903 states. [2018-11-07 18:53:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20903 to 20604. [2018-11-07 18:53:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20604 states. [2018-11-07 18:53:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20604 states to 20604 states and 28801 transitions. [2018-11-07 18:53:49,199 INFO L78 Accepts]: Start accepts. Automaton has 20604 states and 28801 transitions. Word has length 217 [2018-11-07 18:53:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:53:49,200 INFO L480 AbstractCegarLoop]: Abstraction has 20604 states and 28801 transitions. [2018-11-07 18:53:49,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 18:53:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 20604 states and 28801 transitions. [2018-11-07 18:53:49,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-11-07 18:53:49,229 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:53:49,229 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:49,230 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:53:49,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:49,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1080458592, now seen corresponding path program 1 times [2018-11-07 18:53:49,231 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:53:49,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:49,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:49,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:49,232 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:53:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 107 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 18:53:49,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:53:49,889 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:53:49,889 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 282 with the following transitions: [2018-11-07 18:53:49,890 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [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], [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], [338], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [885], [887], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:53:49,912 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:53:49,913 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:53:51,735 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:53:51,735 INFO L272 AbstractInterpreter]: Visited 183 different actions 362 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 18:53:51,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:51,740 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:53:53,554 INFO L227 lantSequenceWeakener]: Weakened 122 states. On average, predicates are now at 75.04% of their original sizes. [2018-11-07 18:53:53,555 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:53:56,529 INFO L415 sIntCurrentIteration]: We unified 280 AI predicates to 280 [2018-11-07 18:53:56,529 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:53:56,530 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:53:56,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [30] imperfect sequences [6] total 34 [2018-11-07 18:53:56,530 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:53:56,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-07 18:53:56,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-07 18:53:56,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2018-11-07 18:53:56,531 INFO L87 Difference]: Start difference. First operand 20604 states and 28801 transitions. Second operand 30 states. [2018-11-07 18:54:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:54:45,335 INFO L93 Difference]: Finished difference Result 40274 states and 56454 transitions. [2018-11-07 18:54:45,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 18:54:45,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 281 [2018-11-07 18:54:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:54:45,410 INFO L225 Difference]: With dead ends: 40274 [2018-11-07 18:54:45,410 INFO L226 Difference]: Without dead ends: 19884 [2018-11-07 18:54:45,449 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 295 GetRequests, 224 SyntacticMatches, 28 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2018-11-07 18:54:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19884 states. [2018-11-07 18:54:45,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19884 to 19663. [2018-11-07 18:54:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19663 states. [2018-11-07 18:54:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19663 states to 19663 states and 27480 transitions. [2018-11-07 18:54:45,940 INFO L78 Accepts]: Start accepts. Automaton has 19663 states and 27480 transitions. Word has length 281 [2018-11-07 18:54:45,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:54:45,940 INFO L480 AbstractCegarLoop]: Abstraction has 19663 states and 27480 transitions. [2018-11-07 18:54:45,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-07 18:54:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 19663 states and 27480 transitions. [2018-11-07 18:54:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-11-07 18:54:45,966 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:54:45,966 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:54:45,967 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:54:45,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:54:45,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1123856124, now seen corresponding path program 1 times [2018-11-07 18:54:45,967 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:54:45,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:54:45,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:54:45,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:54:45,969 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:54:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:54:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 18:54:46,290 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:54:46,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:54:46,291 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:54:46,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:54:46,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:54:46,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:54:46,292 INFO L87 Difference]: Start difference. First operand 19663 states and 27480 transitions. Second operand 4 states. [2018-11-07 18:54:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:54:47,545 INFO L93 Difference]: Finished difference Result 38687 states and 54278 transitions. [2018-11-07 18:54:47,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:54:47,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 290 [2018-11-07 18:54:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:54:47,602 INFO L225 Difference]: With dead ends: 38687 [2018-11-07 18:54:47,602 INFO L226 Difference]: Without dead ends: 19657 [2018-11-07 18:54:47,637 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:54:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19657 states. [2018-11-07 18:54:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19657 to 19657. [2018-11-07 18:54:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19657 states. [2018-11-07 18:54:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19657 states to 19657 states and 27463 transitions. [2018-11-07 18:54:48,475 INFO L78 Accepts]: Start accepts. Automaton has 19657 states and 27463 transitions. Word has length 290 [2018-11-07 18:54:48,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:54:48,476 INFO L480 AbstractCegarLoop]: Abstraction has 19657 states and 27463 transitions. [2018-11-07 18:54:48,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:54:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 19657 states and 27463 transitions. [2018-11-07 18:54:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-11-07 18:54:48,501 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:54:48,502 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, 2, 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] [2018-11-07 18:54:48,502 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:54:48,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:54:48,503 INFO L82 PathProgramCache]: Analyzing trace with hash 967894443, now seen corresponding path program 1 times [2018-11-07 18:54:48,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:54:48,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:54:48,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:54:48,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:54:48,506 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:54:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:54:49,142 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 18:54:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:54:49,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:54:49,360 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:54:49,360 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 295 with the following transitions: [2018-11-07 18:54:49,360 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], [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], [817], [825], [833], [841], [849], [857], [865], [873], [881], [885], [887], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:54:49,367 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:54:49,367 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:54:51,485 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:54:51,485 INFO L272 AbstractInterpreter]: Visited 183 different actions 548 times. Merged at 7 different actions 22 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 18:54:51,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:54:51,492 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:54:51,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:54:51,492 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 18:54:51,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:54:51,503 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:54:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:54:51,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:54:52,167 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-11-07 18:54:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:54:52,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:54:52,492 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-11-07 18:54:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Abandoning pump threads because process wont die! [2018-11-07 18:54:53,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:54:53,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 18:54:53,086 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:54:53,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:54:53,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:54:53,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:54:53,087 INFO L87 Difference]: Start difference. First operand 19657 states and 27463 transitions. Second operand 9 states. [2018-11-07 18:55:01,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:55:01,553 INFO L93 Difference]: Finished difference Result 62186 states and 108656 transitions. [2018-11-07 18:55:01,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-07 18:55:01,554 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 294 [2018-11-07 18:55:01,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:55:01,868 INFO L225 Difference]: With dead ends: 62186 [2018-11-07 18:55:01,868 INFO L226 Difference]: Without dead ends: 43162 [2018-11-07 18:55:02,000 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 603 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=320, Invalid=1162, Unknown=0, NotChecked=0, Total=1482 [2018-11-07 18:55:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43162 states. [2018-11-07 18:55:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43162 to 39464. [2018-11-07 18:55:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39464 states. [2018-11-07 18:55:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39464 states to 39464 states and 53808 transitions. [2018-11-07 18:55:03,639 INFO L78 Accepts]: Start accepts. Automaton has 39464 states and 53808 transitions. Word has length 294 [2018-11-07 18:55:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:55:03,640 INFO L480 AbstractCegarLoop]: Abstraction has 39464 states and 53808 transitions. [2018-11-07 18:55:03,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:55:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 39464 states and 53808 transitions. [2018-11-07 18:55:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-11-07 18:55:03,683 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:55:03,684 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:55:03,684 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:55:03,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:03,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1889915048, now seen corresponding path program 1 times [2018-11-07 18:55:03,684 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:55:03,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:03,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:03,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:03,686 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:55:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 128 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-07 18:55:04,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:04,242 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:55:04,243 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-11-07 18:55:04,243 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [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], [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], [817], [825], [833], [841], [849], [857], [865], [873], [881], [885], [887], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:55:04,248 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:55:04,248 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:55:07,897 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:55:07,898 INFO L272 AbstractInterpreter]: Visited 186 different actions 741 times. Merged at 8 different actions 35 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 4 different actions. Largest state had 88 variables. [2018-11-07 18:55:07,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:07,901 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:55:07,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:07,902 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 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 [2018-11-07 18:55:07,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:07,911 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:55:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:08,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:55:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-07 18:55:08,344 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:55:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 128 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-07 18:55:08,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:55:08,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-07 18:55:08,705 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:55:08,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:55:08,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:55:08,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:55:08,706 INFO L87 Difference]: Start difference. First operand 39464 states and 53808 transitions. Second operand 6 states. [2018-11-07 18:55:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:55:12,880 INFO L93 Difference]: Finished difference Result 96608 states and 150400 transitions. [2018-11-07 18:55:12,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:55:12,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 305 [2018-11-07 18:55:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:55:13,281 INFO L225 Difference]: With dead ends: 96608 [2018-11-07 18:55:13,281 INFO L226 Difference]: Without dead ends: 57985 [2018-11-07 18:55:13,413 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 612 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-11-07 18:55:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57985 states. [2018-11-07 18:55:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57985 to 54930. [2018-11-07 18:55:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54930 states. [2018-11-07 18:55:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54930 states to 54930 states and 72448 transitions. [2018-11-07 18:55:15,144 INFO L78 Accepts]: Start accepts. Automaton has 54930 states and 72448 transitions. Word has length 305 [2018-11-07 18:55:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:55:15,145 INFO L480 AbstractCegarLoop]: Abstraction has 54930 states and 72448 transitions. [2018-11-07 18:55:15,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:55:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 54930 states and 72448 transitions. [2018-11-07 18:55:15,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-11-07 18:55:15,189 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:55:15,189 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:55:15,190 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:55:15,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:15,190 INFO L82 PathProgramCache]: Analyzing trace with hash 780645126, now seen corresponding path program 1 times [2018-11-07 18:55:15,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:55:15,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:15,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:15,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:15,191 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:55:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:55:15,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:15,831 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:55:15,832 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 318 with the following transitions: [2018-11-07 18:55:15,832 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [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], [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], [817], [825], [833], [841], [849], [857], [865], [873], [881], [885], [887], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:55:15,837 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:55:15,837 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:55:18,584 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:55:18,585 INFO L272 AbstractInterpreter]: Visited 183 different actions 546 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 18:55:18,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:18,589 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:55:18,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:18,589 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 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 [2018-11-07 18:55:18,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:18,598 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:55:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:18,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:55:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-11-07 18:55:19,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:55:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-11-07 18:55:19,215 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:55:19,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 18:55:19,215 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:55:19,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:55:19,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:55:19,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:55:19,216 INFO L87 Difference]: Start difference. First operand 54930 states and 72448 transitions. Second operand 3 states. [2018-11-07 18:55:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:55:21,303 INFO L93 Difference]: Finished difference Result 116107 states and 156711 transitions. [2018-11-07 18:55:21,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:55:21,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 317 [2018-11-07 18:55:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:55:21,519 INFO L225 Difference]: With dead ends: 116107 [2018-11-07 18:55:21,519 INFO L226 Difference]: Without dead ends: 62020 [2018-11-07 18:55:21,624 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 632 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:55:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62020 states. [2018-11-07 18:55:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62020 to 62000. [2018-11-07 18:55:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62000 states. [2018-11-07 18:55:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62000 states to 62000 states and 82615 transitions. [2018-11-07 18:55:22,872 INFO L78 Accepts]: Start accepts. Automaton has 62000 states and 82615 transitions. Word has length 317 [2018-11-07 18:55:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:55:22,873 INFO L480 AbstractCegarLoop]: Abstraction has 62000 states and 82615 transitions. [2018-11-07 18:55:22,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:55:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 62000 states and 82615 transitions. [2018-11-07 18:55:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-11-07 18:55:22,902 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:55:22,902 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:55:22,903 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:55:22,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:22,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1339145892, now seen corresponding path program 1 times [2018-11-07 18:55:22,903 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:55:22,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:22,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:22,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:55:22,904 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:55:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:23,599 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 18:55:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 146 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:55:24,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:24,471 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:55:24,471 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 328 with the following transitions: [2018-11-07 18:55:24,472 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [52], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [99], [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], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [885], [887], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:55:24,476 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:55:24,476 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:55:26,792 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:55:26,792 INFO L272 AbstractInterpreter]: Visited 184 different actions 549 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 18:55:26,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:55:26,800 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:55:26,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:55:26,800 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:55:26,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:55:26,810 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:55:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:55:27,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:55:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-07 18:55:27,736 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:55:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 162 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-07 18:55:28,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:55:28,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2018-11-07 18:55:28,135 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:55:28,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 18:55:28,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 18:55:28,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:55:28,137 INFO L87 Difference]: Start difference. First operand 62000 states and 82615 transitions. Second operand 13 states. [2018-11-07 18:55:42,664 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 15 Received shutdown request... [2018-11-07 18:56:19,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-11-07 18:56:19,773 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:56:19,782 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:56:19,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:56:19 BoogieIcfgContainer [2018-11-07 18:56:19,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:56:19,783 INFO L168 Benchmark]: Toolchain (without parser) took 224977.54 ms. Allocated memory was 1.5 GB in the beginning and 5.1 GB in the end (delta: 3.5 GB). Free memory was 1.4 GB in the beginning and 4.1 GB in the end (delta: -2.6 GB). Peak memory consumption was 4.0 GB. Max. memory is 7.1 GB. [2018-11-07 18:56:19,784 INFO L168 Benchmark]: CDTParser took 1.54 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 18:56:19,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1170.61 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. [2018-11-07 18:56:19,787 INFO L168 Benchmark]: Boogie Procedure Inliner took 208.28 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -881.6 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:56:19,788 INFO L168 Benchmark]: Boogie Preprocessor took 134.09 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. [2018-11-07 18:56:19,788 INFO L168 Benchmark]: RCFGBuilder took 5163.60 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: 254.9 MB). Peak memory consumption was 254.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:56:19,789 INFO L168 Benchmark]: TraceAbstraction took 218295.84 ms. Allocated memory was 2.3 GB in the beginning and 5.1 GB in the end (delta: 2.8 GB). Free memory was 2.0 GB in the beginning and 4.1 GB in the end (delta: -2.1 GB). Peak memory consumption was 3.8 GB. Max. memory is 7.1 GB. [2018-11-07 18:56:19,793 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.54 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 1170.61 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 208.28 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -881.6 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.09 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 5163.60 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: 254.9 MB). Peak memory consumption was 254.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218295.84 ms. Allocated memory was 2.3 GB in the beginning and 5.1 GB in the end (delta: 2.8 GB). Free memory was 2.0 GB in the beginning and 4.1 GB in the end (delta: -2.1 GB). Peak memory consumption was 3.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1548]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1548). Cancelled while BasicCegarLoop was constructing difference of abstraction (62000states) and FLOYD_HOARE automaton (currently 129 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (665073 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 218.2s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 171.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2894 SDtfs, 27009 SDslu, 5465 SDs, 0 SdLazy, 38492 SolverSat, 10500 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 91.3s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 3879 GetRequests, 3487 SyntacticMatches, 36 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11855 ImplicationChecksByTransitivity, 17.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62000occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 16.7s AbstIntTime, 7 AbstIntIterations, 2 AbstIntStrong, 0.9990903896521375 AbsIntWeakeningRatio, 0.2731006160164271 AbsIntAvgWeakeningVarsNumRemoved, 47.5564681724846 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 7630 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 4450 NumberOfCodeBlocks, 4450 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 5888 ConstructedInterpolants, 0 QuantifiedInterpolants, 3357135 SizeOfPredicates, 21 NumberOfNonLiveVariables, 5869 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 22 InterpolantComputations, 7 PerfectInterpolantSequences, 2278/2406 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown