java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label49_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:19:40,814 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:19:40,819 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:19:40,831 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:19:40,832 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:19:40,833 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:19:40,834 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:19:40,836 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:19:40,837 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:19:40,839 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:19:40,840 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:19:40,840 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:19:40,841 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:19:40,842 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:19:40,843 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:19:40,844 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:19:40,844 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:19:40,846 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:19:40,848 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:19:40,850 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:19:40,851 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:19:40,852 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:19:40,854 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:19:40,855 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:19:40,855 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:19:40,856 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:19:40,857 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:19:40,857 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:19:40,858 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:19:40,859 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:19:40,860 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:19:40,860 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 14:19:40,860 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:19:40,861 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:19:40,862 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:19:40,862 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:19:40,863 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 14:19:40,886 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:19:40,886 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:19:40,890 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:19:40,890 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:19:40,890 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:19:40,891 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:19:40,891 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:19:40,891 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:19:40,891 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:19:40,891 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:19:40,892 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:19:40,892 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:19:40,892 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:19:40,893 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:19:40,893 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:19:40,893 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:19:40,893 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:19:40,893 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:19:40,894 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:19:40,894 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:19:40,894 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:19:40,894 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:19:40,894 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:19:40,895 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:19:40,895 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:19:40,895 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:19:40,895 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:19:40,895 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:19:40,896 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:19:40,896 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:19:40,896 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:19:40,896 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:19:40,896 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:19:40,896 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:19:40,948 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:19:40,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:19:40,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:19:40,966 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:19:40,967 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:19:40,968 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label49_true-unreach-call.c [2018-10-27 14:19:41,029 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d18aaf80d/e3ad568e19bc41a9bf2e4edbf20a8c6e/FLAG1cce52233 [2018-10-27 14:19:41,777 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:19:41,778 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label49_true-unreach-call.c [2018-10-27 14:19:41,813 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d18aaf80d/e3ad568e19bc41a9bf2e4edbf20a8c6e/FLAG1cce52233 [2018-10-27 14:19:41,833 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d18aaf80d/e3ad568e19bc41a9bf2e4edbf20a8c6e [2018-10-27 14:19:41,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:19:41,848 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:19:41,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:19:41,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:19:41,858 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:19:41,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:19:41" (1/1) ... [2018-10-27 14:19:41,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31151419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:41, skipping insertion in model container [2018-10-27 14:19:41,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:19:41" (1/1) ... [2018-10-27 14:19:41,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:19:42,077 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:19:43,586 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:19:43,591 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:19:44,389 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:19:44,429 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:19:44,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44 WrapperNode [2018-10-27 14:19:44,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:19:44,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:19:44,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:19:44,431 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:19:44,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (1/1) ... [2018-10-27 14:19:44,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (1/1) ... [2018-10-27 14:19:45,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:19:45,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:19:45,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:19:45,121 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:19:45,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (1/1) ... [2018-10-27 14:19:45,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (1/1) ... [2018-10-27 14:19:45,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (1/1) ... [2018-10-27 14:19:45,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (1/1) ... [2018-10-27 14:19:45,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (1/1) ... [2018-10-27 14:19:45,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (1/1) ... [2018-10-27 14:19:45,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (1/1) ... [2018-10-27 14:19:45,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:19:45,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:19:45,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:19:45,479 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:19:45,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:19:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:19:45,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:19:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 14:19:45,560 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 14:19:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 14:19:45,561 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 14:19:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 14:19:45,561 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 14:19:45,561 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:19:45,561 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:19:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:19:45,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:19:45,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:19:45,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:19:56,339 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:19:56,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:19:56 BoogieIcfgContainer [2018-10-27 14:19:56,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:19:56,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:19:56,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:19:56,345 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:19:56,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:19:41" (1/3) ... [2018-10-27 14:19:56,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17aa6bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:19:56, skipping insertion in model container [2018-10-27 14:19:56,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:44" (2/3) ... [2018-10-27 14:19:56,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17aa6bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:19:56, skipping insertion in model container [2018-10-27 14:19:56,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:19:56" (3/3) ... [2018-10-27 14:19:56,349 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label49_true-unreach-call.c [2018-10-27 14:19:56,359 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:19:56,369 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:19:56,387 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:19:56,445 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:19:56,446 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:19:56,446 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:19:56,446 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:19:56,446 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:19:56,446 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:19:56,447 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:19:56,447 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:19:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-10-27 14:19:56,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-27 14:19:56,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:19:56,502 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] [2018-10-27 14:19:56,504 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:19:56,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:19:56,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1815238907, now seen corresponding path program 1 times [2018-10-27 14:19:56,514 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:19:56,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:19:56,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:19:56,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:19:56,569 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:19:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:19:57,075 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-27 14:19:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:19:57,102 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:19:57,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:19:57,103 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:19:57,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:19:57,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:19:57,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:19:57,129 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 4 states. [2018-10-27 14:20:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:20:11,411 INFO L93 Difference]: Finished difference Result 4063 states and 7611 transitions. [2018-10-27 14:20:11,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:20:11,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2018-10-27 14:20:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:20:11,481 INFO L225 Difference]: With dead ends: 4063 [2018-10-27 14:20:11,482 INFO L226 Difference]: Without dead ends: 2937 [2018-10-27 14:20:11,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:20:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2018-10-27 14:20:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 1982. [2018-10-27 14:20:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1982 states. [2018-10-27 14:20:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3456 transitions. [2018-10-27 14:20:11,697 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3456 transitions. Word has length 65 [2018-10-27 14:20:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:20:11,697 INFO L481 AbstractCegarLoop]: Abstraction has 1982 states and 3456 transitions. [2018-10-27 14:20:11,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:20:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3456 transitions. [2018-10-27 14:20:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-27 14:20:11,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:20:11,707 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:20:11,707 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:20:11,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:20:11,708 INFO L82 PathProgramCache]: Analyzing trace with hash -617731529, now seen corresponding path program 1 times [2018-10-27 14:20:11,708 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:20:11,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:20:11,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:20:11,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:20:11,710 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:20:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:20:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:20:12,088 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:20:12,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:20:12,088 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:20:12,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:20:12,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:20:12,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:20:12,091 INFO L87 Difference]: Start difference. First operand 1982 states and 3456 transitions. Second operand 6 states. [2018-10-27 14:20:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:20:30,869 INFO L93 Difference]: Finished difference Result 7277 states and 13063 transitions. [2018-10-27 14:20:30,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:20:30,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-10-27 14:20:30,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:20:30,913 INFO L225 Difference]: With dead ends: 7277 [2018-10-27 14:20:30,913 INFO L226 Difference]: Without dead ends: 5301 [2018-10-27 14:20:30,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 14:20:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2018-10-27 14:20:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 5252. [2018-10-27 14:20:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5252 states. [2018-10-27 14:20:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5252 states to 5252 states and 8253 transitions. [2018-10-27 14:20:31,098 INFO L78 Accepts]: Start accepts. Automaton has 5252 states and 8253 transitions. Word has length 136 [2018-10-27 14:20:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:20:31,098 INFO L481 AbstractCegarLoop]: Abstraction has 5252 states and 8253 transitions. [2018-10-27 14:20:31,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:20:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5252 states and 8253 transitions. [2018-10-27 14:20:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-27 14:20:31,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:20:31,104 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:20:31,104 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:20:31,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:20:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash -824137274, now seen corresponding path program 1 times [2018-10-27 14:20:31,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:20:31,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:20:31,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:20:31,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:20:31,106 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:20:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:20:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:20:31,464 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:20:31,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:20:31,464 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:20:31,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:20:31,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:20:31,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:20:31,466 INFO L87 Difference]: Start difference. First operand 5252 states and 8253 transitions. Second operand 6 states. [2018-10-27 14:20:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:20:48,939 INFO L93 Difference]: Finished difference Result 14735 states and 24202 transitions. [2018-10-27 14:20:48,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 14:20:48,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2018-10-27 14:20:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:20:48,988 INFO L225 Difference]: With dead ends: 14735 [2018-10-27 14:20:48,988 INFO L226 Difference]: Without dead ends: 9489 [2018-10-27 14:20:49,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 14:20:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9489 states. [2018-10-27 14:20:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9489 to 9420. [2018-10-27 14:20:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9420 states. [2018-10-27 14:20:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9420 states to 9420 states and 14479 transitions. [2018-10-27 14:20:49,246 INFO L78 Accepts]: Start accepts. Automaton has 9420 states and 14479 transitions. Word has length 139 [2018-10-27 14:20:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:20:49,247 INFO L481 AbstractCegarLoop]: Abstraction has 9420 states and 14479 transitions. [2018-10-27 14:20:49,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:20:49,247 INFO L276 IsEmpty]: Start isEmpty. Operand 9420 states and 14479 transitions. [2018-10-27 14:20:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-27 14:20:49,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:20:49,254 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:20:49,255 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:20:49,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:20:49,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2024947088, now seen corresponding path program 1 times [2018-10-27 14:20:49,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:20:49,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:20:49,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:20:49,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:20:49,261 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:20:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:20:49,564 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:20:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:20:49,901 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:20:49,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:20:49,902 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:20:49,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:20:49,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:20:49,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:20:49,903 INFO L87 Difference]: Start difference. First operand 9420 states and 14479 transitions. Second operand 6 states. [2018-10-27 14:21:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:21:02,176 INFO L93 Difference]: Finished difference Result 28887 states and 45884 transitions. [2018-10-27 14:21:02,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:21:02,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 170 [2018-10-27 14:21:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:21:02,262 INFO L225 Difference]: With dead ends: 28887 [2018-10-27 14:21:02,263 INFO L226 Difference]: Without dead ends: 19473 [2018-10-27 14:21:02,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 14:21:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19473 states. [2018-10-27 14:21:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19473 to 19379. [2018-10-27 14:21:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19379 states. [2018-10-27 14:21:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19379 states to 19379 states and 27305 transitions. [2018-10-27 14:21:02,822 INFO L78 Accepts]: Start accepts. Automaton has 19379 states and 27305 transitions. Word has length 170 [2018-10-27 14:21:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:21:02,822 INFO L481 AbstractCegarLoop]: Abstraction has 19379 states and 27305 transitions. [2018-10-27 14:21:02,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:21:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 19379 states and 27305 transitions. [2018-10-27 14:21:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-27 14:21:02,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:21:02,838 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:21:02,838 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:21:02,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:21:02,838 INFO L82 PathProgramCache]: Analyzing trace with hash -658364123, now seen corresponding path program 1 times [2018-10-27 14:21:02,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:21:02,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:21:02,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:21:02,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:21:02,840 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:21:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:21:03,229 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:21:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:21:03,685 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:21:03,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:21:03,687 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:21:03,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:21:03,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:21:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:21:03,689 INFO L87 Difference]: Start difference. First operand 19379 states and 27305 transitions. Second operand 6 states. [2018-10-27 14:21:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:21:18,542 INFO L93 Difference]: Finished difference Result 49637 states and 77393 transitions. [2018-10-27 14:21:18,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:21:18,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 233 [2018-10-27 14:21:18,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:21:18,672 INFO L225 Difference]: With dead ends: 49637 [2018-10-27 14:21:18,672 INFO L226 Difference]: Without dead ends: 30264 [2018-10-27 14:21:18,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 14:21:18,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30264 states. [2018-10-27 14:21:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30264 to 30110. [2018-10-27 14:21:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30110 states. [2018-10-27 14:21:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30110 states to 30110 states and 43535 transitions. [2018-10-27 14:21:19,467 INFO L78 Accepts]: Start accepts. Automaton has 30110 states and 43535 transitions. Word has length 233 [2018-10-27 14:21:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:21:19,468 INFO L481 AbstractCegarLoop]: Abstraction has 30110 states and 43535 transitions. [2018-10-27 14:21:19,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:21:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 30110 states and 43535 transitions. [2018-10-27 14:21:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-27 14:21:19,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:21:19,483 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 14:21:19,483 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:21:19,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:21:19,484 INFO L82 PathProgramCache]: Analyzing trace with hash -16938847, now seen corresponding path program 1 times [2018-10-27 14:21:19,484 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:21:19,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:21:19,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:21:19,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:21:19,485 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:21:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:21:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 116 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:21:19,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:21:19,834 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:21:19,836 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 247 with the following transitions: [2018-10-27 14:21:19,838 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2971], [2979], [2987], [2995], [3003], [3011], [3019], [3027], [3035], [3043], [3047], [3049], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3151], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3281], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-10-27 14:21:19,902 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:21:19,903 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:21:20,710 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:21:20,713 INFO L272 AbstractInterpreter]: Visited 110 different actions 110 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-27 14:21:20,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:21:20,756 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:21:21,700 INFO L227 lantSequenceWeakener]: Weakened 224 states. On average, predicates are now at 71.8% of their original sizes. [2018-10-27 14:21:21,701 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:21:22,272 INFO L415 sIntCurrentIteration]: We unified 245 AI predicates to 245 [2018-10-27 14:21:22,272 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:21:22,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:21:22,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2018-10-27 14:21:22,273 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:21:22,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 14:21:22,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 14:21:22,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-10-27 14:21:22,275 INFO L87 Difference]: Start difference. First operand 30110 states and 43535 transitions. Second operand 10 states. [2018-10-27 14:21:29,142 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown