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_label44_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:56:19,747 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:56:19,750 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:56:19,763 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:56:19,764 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:56:19,765 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:56:19,767 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:56:19,769 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:56:19,771 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:56:19,772 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:56:19,773 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:56:19,774 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:56:19,775 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:56:19,776 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:56:19,777 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:56:19,778 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:56:19,779 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:56:19,781 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:56:19,783 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:56:19,785 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:56:19,786 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:56:19,788 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:56:19,791 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:56:19,791 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:56:19,791 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:56:19,792 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:56:19,793 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:56:19,794 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:56:19,795 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:56:19,796 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:56:19,797 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:56:19,797 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:56:19,798 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:56:19,798 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:56:19,799 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:56:19,800 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:56:19,800 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 18:56:19,817 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:56:19,817 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:56:19,818 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:56:19,818 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:56:19,818 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:56:19,818 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:56:19,819 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:56:19,819 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:56:19,819 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:56:19,819 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:56:19,819 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:56:19,820 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:56:19,820 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:56:19,821 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:56:19,821 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:56:19,821 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:56:19,821 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:56:19,822 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:56:19,822 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:56:19,822 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:56:19,822 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:56:19,822 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:56:19,823 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:56:19,823 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:56:19,823 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:56:19,823 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:56:19,824 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:56:19,824 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:56:19,824 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:56:19,824 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:56:19,824 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:56:19,825 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:56:19,825 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:56:19,825 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:56:19,825 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:56:19,870 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:56:19,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:56:19,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:56:19,889 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:56:19,890 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:56:19,891 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label44_true-unreach-call.c [2018-11-07 18:56:19,957 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d0eab4e/9bf1c30ea6fa4c018249e4660d8ac260/FLAG8f867632e [2018-11-07 18:56:20,658 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:56:20,659 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label44_true-unreach-call.c [2018-11-07 18:56:20,679 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d0eab4e/9bf1c30ea6fa4c018249e4660d8ac260/FLAG8f867632e [2018-11-07 18:56:20,699 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9d0eab4e/9bf1c30ea6fa4c018249e4660d8ac260 [2018-11-07 18:56:20,710 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:56:20,712 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:56:20,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:56:20,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:56:20,717 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:56:20,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:56:20" (1/1) ... [2018-11-07 18:56:20,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7833d5bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:20, skipping insertion in model container [2018-11-07 18:56:20,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:56:20" (1/1) ... [2018-11-07 18:56:20,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:56:20,831 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:56:21,612 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:56:21,618 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:56:21,937 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:56:21,972 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:56:21,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21 WrapperNode [2018-11-07 18:56:21,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:56:21,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:56:21,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:56:21,975 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:56:21,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (1/1) ... [2018-11-07 18:56:22,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (1/1) ... [2018-11-07 18:56:22,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:56:22,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:56:22,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:56:22,188 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:56:22,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (1/1) ... [2018-11-07 18:56:22,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (1/1) ... [2018-11-07 18:56:22,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (1/1) ... [2018-11-07 18:56:22,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (1/1) ... [2018-11-07 18:56:22,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (1/1) ... [2018-11-07 18:56:22,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (1/1) ... [2018-11-07 18:56:22,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (1/1) ... [2018-11-07 18:56:22,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:56:22,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:56:22,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:56:22,345 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:56:22,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (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 18:56:22,425 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:56:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:56:22,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:56:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:56:22,426 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:56:22,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:56:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:56:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:56:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:56:27,839 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:56:27,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:56:27 BoogieIcfgContainer [2018-11-07 18:56:27,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:56:27,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:56:27,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:56:27,845 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:56:27,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:56:20" (1/3) ... [2018-11-07 18:56:27,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f326697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:56:27, skipping insertion in model container [2018-11-07 18:56:27,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:21" (2/3) ... [2018-11-07 18:56:27,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f326697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:56:27, skipping insertion in model container [2018-11-07 18:56:27,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:56:27" (3/3) ... [2018-11-07 18:56:27,849 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label44_true-unreach-call.c [2018-11-07 18:56:27,860 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:56:27,869 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:56:27,888 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:56:27,927 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:56:27,928 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:56:27,928 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:56:27,928 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:56:27,928 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:56:27,928 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:56:27,928 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:56:27,929 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:56:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 18:56:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-11-07 18:56:27,987 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:56:27,988 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:56:27,992 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:56:27,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1268744215, now seen corresponding path program 1 times [2018-11-07 18:56:28,000 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:56:28,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:28,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:56:28,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:28,052 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:56:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:56:29,183 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 18:56:29,186 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:56:29,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:56:29,186 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:56:29,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:56:29,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:56:29,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:56:29,218 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-07 18:56:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:56:32,727 INFO L93 Difference]: Finished difference Result 1086 states and 1949 transitions. [2018-11-07 18:56:32,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:56:32,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 184 [2018-11-07 18:56:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:56:32,756 INFO L225 Difference]: With dead ends: 1086 [2018-11-07 18:56:32,756 INFO L226 Difference]: Without dead ends: 768 [2018-11-07 18:56:32,765 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 18:56:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2018-11-07 18:56:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 525. [2018-11-07 18:56:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-11-07 18:56:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 910 transitions. [2018-11-07 18:56:32,870 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 910 transitions. Word has length 184 [2018-11-07 18:56:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:56:32,871 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 910 transitions. [2018-11-07 18:56:32,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:56:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 910 transitions. [2018-11-07 18:56:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-07 18:56:32,880 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:56:32,880 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, 1, 1, 1, 1, 1, 1] [2018-11-07 18:56:32,880 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:56:32,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:32,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1064364326, now seen corresponding path program 1 times [2018-11-07 18:56:32,881 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:56:32,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:32,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:56:32,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:32,883 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:56:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:56:33,197 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:56:33,427 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 18:56:33,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:56:33,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 18:56:33,428 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:56:33,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 18:56:33,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 18:56:33,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 18:56:33,431 INFO L87 Difference]: Start difference. First operand 525 states and 910 transitions. Second operand 5 states. [2018-11-07 18:56:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:56:36,931 INFO L93 Difference]: Finished difference Result 1613 states and 2895 transitions. [2018-11-07 18:56:36,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:56:36,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 195 [2018-11-07 18:56:36,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:56:36,947 INFO L225 Difference]: With dead ends: 1613 [2018-11-07 18:56:36,947 INFO L226 Difference]: Without dead ends: 1094 [2018-11-07 18:56:36,951 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:56:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2018-11-07 18:56:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 864. [2018-11-07 18:56:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2018-11-07 18:56:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1422 transitions. [2018-11-07 18:56:37,019 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1422 transitions. Word has length 195 [2018-11-07 18:56:37,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:56:37,020 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 1422 transitions. [2018-11-07 18:56:37,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 18:56:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1422 transitions. [2018-11-07 18:56:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-11-07 18:56:37,026 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:56:37,026 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:56:37,026 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:56:37,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:37,027 INFO L82 PathProgramCache]: Analyzing trace with hash -262902419, now seen corresponding path program 1 times [2018-11-07 18:56:37,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:56:37,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:37,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:56:37,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:37,029 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:56:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:56:37,331 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 18:56:37,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:56:37,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:56:37,332 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:56:37,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:56:37,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:56:37,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:56:37,334 INFO L87 Difference]: Start difference. First operand 864 states and 1422 transitions. Second operand 3 states. [2018-11-07 18:56:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:56:39,749 INFO L93 Difference]: Finished difference Result 2471 states and 4181 transitions. [2018-11-07 18:56:39,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:56:39,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2018-11-07 18:56:39,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:56:39,767 INFO L225 Difference]: With dead ends: 2471 [2018-11-07 18:56:39,768 INFO L226 Difference]: Without dead ends: 1613 [2018-11-07 18:56:39,773 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 18:56:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2018-11-07 18:56:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1610. [2018-11-07 18:56:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1610 states. [2018-11-07 18:56:39,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2542 transitions. [2018-11-07 18:56:39,833 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2542 transitions. Word has length 197 [2018-11-07 18:56:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:56:39,835 INFO L480 AbstractCegarLoop]: Abstraction has 1610 states and 2542 transitions. [2018-11-07 18:56:39,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:56:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2542 transitions. [2018-11-07 18:56:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-07 18:56:39,843 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:56:39,843 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:56:39,844 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:56:39,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:39,844 INFO L82 PathProgramCache]: Analyzing trace with hash -128043501, now seen corresponding path program 1 times [2018-11-07 18:56:39,844 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:56:39,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:39,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:56:39,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:39,846 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:56:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:56:40,061 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 18:56:40,263 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 18:56:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:56:40,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:56:40,330 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:56:40,331 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 206 with the following transitions: [2018-11-07 18:56:40,338 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [16], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:56:40,417 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:56:40,417 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:56:42,002 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:56:42,004 INFO L272 AbstractInterpreter]: Visited 185 different actions 185 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 18:56:42,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:42,049 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:56:43,283 INFO L227 lantSequenceWeakener]: Weakened 194 states. On average, predicates are now at 73.39% of their original sizes. [2018-11-07 18:56:43,283 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:56:45,338 INFO L415 sIntCurrentIteration]: We unified 204 AI predicates to 204 [2018-11-07 18:56:45,338 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:56:45,339 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:56:45,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [6] total 29 [2018-11-07 18:56:45,339 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:56:45,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-07 18:56:45,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-07 18:56:45,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2018-11-07 18:56:45,341 INFO L87 Difference]: Start difference. First operand 1610 states and 2542 transitions. Second operand 25 states. [2018-11-07 18:57:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:57:05,978 INFO L93 Difference]: Finished difference Result 3424 states and 5418 transitions. [2018-11-07 18:57:05,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:57:05,978 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 205 [2018-11-07 18:57:05,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:57:05,989 INFO L225 Difference]: With dead ends: 3424 [2018-11-07 18:57:05,989 INFO L226 Difference]: Without dead ends: 1820 [2018-11-07 18:57:05,995 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 207 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2018-11-07 18:57:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2018-11-07 18:57:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1818. [2018-11-07 18:57:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1818 states. [2018-11-07 18:57:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 2758 transitions. [2018-11-07 18:57:06,046 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 2758 transitions. Word has length 205 [2018-11-07 18:57:06,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:57:06,046 INFO L480 AbstractCegarLoop]: Abstraction has 1818 states and 2758 transitions. [2018-11-07 18:57:06,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-07 18:57:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 2758 transitions. [2018-11-07 18:57:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-07 18:57:06,056 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:57:06,056 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:57:06,057 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:57:06,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:57:06,057 INFO L82 PathProgramCache]: Analyzing trace with hash 74938608, now seen corresponding path program 1 times [2018-11-07 18:57:06,057 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:57:06,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:57:06,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:57:06,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:57:06,060 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:57:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:57:06,345 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 18:57:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:57:06,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:57:06,549 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:57:06,549 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-11-07 18:57:06,549 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [16], [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], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:57:06,560 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:57:06,560 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:57:08,191 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:57:08,191 INFO L272 AbstractInterpreter]: Visited 189 different actions 372 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:57:08,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:57:08,199 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:57:09,850 INFO L227 lantSequenceWeakener]: Weakened 93 states. On average, predicates are now at 77.54% of their original sizes. [2018-11-07 18:57:09,850 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:57:18,174 INFO L415 sIntCurrentIteration]: We unified 216 AI predicates to 216 [2018-11-07 18:57:18,174 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:57:18,175 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:57:18,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [38] imperfect sequences [9] total 45 [2018-11-07 18:57:18,175 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:57:18,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-07 18:57:18,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-07 18:57:18,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2018-11-07 18:57:18,177 INFO L87 Difference]: Start difference. First operand 1818 states and 2758 transitions. Second operand 38 states. [2018-11-07 18:58:24,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:58:24,866 INFO L93 Difference]: Finished difference Result 3636 states and 5642 transitions. [2018-11-07 18:58:24,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 18:58:24,867 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 217 [2018-11-07 18:58:24,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:58:24,877 INFO L225 Difference]: With dead ends: 3636 [2018-11-07 18:58:24,878 INFO L226 Difference]: Without dead ends: 2032 [2018-11-07 18:58:24,884 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 229 GetRequests, 131 SyntacticMatches, 49 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=462, Invalid=2088, Unknown=0, NotChecked=0, Total=2550 [2018-11-07 18:58:24,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2018-11-07 18:58:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2029. [2018-11-07 18:58:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2029 states. [2018-11-07 18:58:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 2986 transitions. [2018-11-07 18:58:24,934 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 2986 transitions. Word has length 217 [2018-11-07 18:58:24,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:58:24,934 INFO L480 AbstractCegarLoop]: Abstraction has 2029 states and 2986 transitions. [2018-11-07 18:58:24,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-07 18:58:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 2986 transitions. [2018-11-07 18:58:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-07 18:58:24,942 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:58:24,942 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:24,943 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:58:24,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:24,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2031809899, now seen corresponding path program 1 times [2018-11-07 18:58:24,943 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:58:24,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:24,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:24,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:24,945 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:58:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:58:25,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:25,262 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:58:25,262 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-11-07 18:58:25,262 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:58:25,270 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:58:25,271 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:58:27,162 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:58:27,163 INFO L272 AbstractInterpreter]: Visited 189 different actions 370 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:58:27,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:27,173 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:58:27,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:27,173 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 18:58:27,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:27,184 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:58:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:27,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:58:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 18:58:27,464 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:58:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 18:58:27,666 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:58:27,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2018-11-07 18:58:27,667 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:58:27,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:58:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:58:27,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:58:27,668 INFO L87 Difference]: Start difference. First operand 2029 states and 2986 transitions. Second operand 3 states. [2018-11-07 18:58:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:58:28,477 INFO L93 Difference]: Finished difference Result 3632 states and 5525 transitions. [2018-11-07 18:58:28,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:58:28,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2018-11-07 18:58:28,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:58:28,490 INFO L225 Difference]: With dead ends: 3632 [2018-11-07 18:58:28,490 INFO L226 Difference]: Without dead ends: 2028 [2018-11-07 18:58:28,495 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:58:28,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2018-11-07 18:58:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 2028. [2018-11-07 18:58:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2028 states. [2018-11-07 18:58:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2984 transitions. [2018-11-07 18:58:28,543 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2984 transitions. Word has length 217 [2018-11-07 18:58:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:58:28,544 INFO L480 AbstractCegarLoop]: Abstraction has 2028 states and 2984 transitions. [2018-11-07 18:58:28,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:58:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2984 transitions. [2018-11-07 18:58:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-11-07 18:58:28,552 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:58:28,553 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:58:28,553 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:58:28,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash -860808213, now seen corresponding path program 1 times [2018-11-07 18:58:28,554 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:58:28,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:28,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:28,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:28,555 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:58:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:58:28,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:28,751 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:58:28,751 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 227 with the following transitions: [2018-11-07 18:58:28,751 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:58:28,757 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:58:28,757 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:58:30,143 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:58:30,143 INFO L272 AbstractInterpreter]: Visited 189 different actions 370 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:58:30,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:30,153 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:58:30,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:30,153 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 18:58:30,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:30,162 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:58:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:30,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:58:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:58:30,594 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:58:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:58:31,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:58:31,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-11-07 18:58:31,201 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:58:31,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:58:31,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:58:31,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:58:31,202 INFO L87 Difference]: Start difference. First operand 2028 states and 2984 transitions. Second operand 9 states. [2018-11-07 18:58:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:58:41,463 INFO L93 Difference]: Finished difference Result 14108 states and 27520 transitions. [2018-11-07 18:58:41,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-07 18:58:41,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 226 [2018-11-07 18:58:41,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:58:41,565 INFO L225 Difference]: With dead ends: 14108 [2018-11-07 18:58:41,566 INFO L226 Difference]: Without dead ends: 12505 [2018-11-07 18:58:41,609 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2018-11-07 18:58:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12505 states. [2018-11-07 18:58:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12505 to 12282. [2018-11-07 18:58:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12282 states. [2018-11-07 18:58:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12282 states to 12282 states and 18795 transitions. [2018-11-07 18:58:42,132 INFO L78 Accepts]: Start accepts. Automaton has 12282 states and 18795 transitions. Word has length 226 [2018-11-07 18:58:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:58:42,133 INFO L480 AbstractCegarLoop]: Abstraction has 12282 states and 18795 transitions. [2018-11-07 18:58:42,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:58:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 12282 states and 18795 transitions. [2018-11-07 18:58:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-11-07 18:58:42,175 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:58:42,175 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:42,176 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:58:42,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:42,176 INFO L82 PathProgramCache]: Analyzing trace with hash 575899775, now seen corresponding path program 1 times [2018-11-07 18:58:42,176 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:58:42,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:42,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:42,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:42,178 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:58:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:58:42,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:42,764 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:58:42,764 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 248 with the following transitions: [2018-11-07 18:58:42,765 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [147], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:58:42,770 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:58:42,770 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:58:45,085 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:58:45,085 INFO L272 AbstractInterpreter]: Visited 189 different actions 373 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 18:58:45,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:45,093 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:58:45,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:45,093 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 18:58:45,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:45,102 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:58:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:45,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:58:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:58:45,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:58:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:58:45,558 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:58:45,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 18:58:45,559 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:58:45,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:58:45,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:58:45,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:58:45,560 INFO L87 Difference]: Start difference. First operand 12282 states and 18795 transitions. Second operand 3 states. [2018-11-07 18:58:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:58:47,702 INFO L93 Difference]: Finished difference Result 24292 states and 37469 transitions. [2018-11-07 18:58:47,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:58:47,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 247 [2018-11-07 18:58:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:58:47,778 INFO L225 Difference]: With dead ends: 24292 [2018-11-07 18:58:47,778 INFO L226 Difference]: Without dead ends: 15659 [2018-11-07 18:58:47,816 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 492 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:58:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15659 states. [2018-11-07 18:58:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15659 to 15442. [2018-11-07 18:58:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15442 states. [2018-11-07 18:58:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15442 states to 15442 states and 23649 transitions. [2018-11-07 18:58:48,294 INFO L78 Accepts]: Start accepts. Automaton has 15442 states and 23649 transitions. Word has length 247 [2018-11-07 18:58:48,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:58:48,295 INFO L480 AbstractCegarLoop]: Abstraction has 15442 states and 23649 transitions. [2018-11-07 18:58:48,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:58:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 15442 states and 23649 transitions. [2018-11-07 18:58:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-11-07 18:58:48,364 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:58:48,365 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:48,365 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:58:48,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:48,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1298758771, now seen corresponding path program 1 times [2018-11-07 18:58:48,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:58:48,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:48,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:48,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:48,367 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:58:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 125 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:58:48,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:48,884 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:58:48,884 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 296 with the following transitions: [2018-11-07 18:58:48,884 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [71], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:58:48,890 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:58:48,890 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:58:51,295 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:58:51,296 INFO L272 AbstractInterpreter]: Visited 190 different actions 375 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 18:58:51,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:51,302 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:58:51,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:51,302 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 18:58:51,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:51,311 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:58:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:51,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:58:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-11-07 18:58:51,604 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:58:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 125 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:58:51,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:58:51,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-07 18:58:51,837 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:58:51,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:58:51,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:58:51,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:58:51,839 INFO L87 Difference]: Start difference. First operand 15442 states and 23649 transitions. Second operand 6 states. [2018-11-07 18:58:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:58:53,286 INFO L93 Difference]: Finished difference Result 29253 states and 45167 transitions. [2018-11-07 18:58:53,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-07 18:58:53,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 295 [2018-11-07 18:58:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:58:53,347 INFO L225 Difference]: With dead ends: 29253 [2018-11-07 18:58:53,347 INFO L226 Difference]: Without dead ends: 15096 [2018-11-07 18:58:53,379 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 589 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:58:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15096 states. [2018-11-07 18:58:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15096 to 15096. [2018-11-07 18:58:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15096 states. [2018-11-07 18:58:53,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15096 states to 15096 states and 22290 transitions. [2018-11-07 18:58:53,731 INFO L78 Accepts]: Start accepts. Automaton has 15096 states and 22290 transitions. Word has length 295 [2018-11-07 18:58:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:58:53,732 INFO L480 AbstractCegarLoop]: Abstraction has 15096 states and 22290 transitions. [2018-11-07 18:58:53,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:58:53,732 INFO L276 IsEmpty]: Start isEmpty. Operand 15096 states and 22290 transitions. [2018-11-07 18:58:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-11-07 18:58:53,795 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:58:53,795 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:53,795 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:58:53,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1270364605, now seen corresponding path program 1 times [2018-11-07 18:58:53,796 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:58:53,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:53,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:53,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:53,797 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:58:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:54,412 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 18:58:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 148 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:58:54,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:54,501 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:58:54,501 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 317 with the following transitions: [2018-11-07 18:58:54,501 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:58:54,506 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:58:54,506 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:58:57,611 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:58:57,611 INFO L272 AbstractInterpreter]: Visited 190 different actions 564 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 18:58:57,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:57,618 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:58:57,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:57,618 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 18:58:57,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:57,628 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:58:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:57,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:58:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:58:58,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:58:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 18:58:58,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:58:58,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 18:58:58,887 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:58:58,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:58:58,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:58:58,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:58:58,888 INFO L87 Difference]: Start difference. First operand 15096 states and 22290 transitions. Second operand 9 states. [2018-11-07 18:59:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:59:04,933 INFO L93 Difference]: Finished difference Result 31806 states and 50371 transitions. [2018-11-07 18:59:04,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-07 18:59:04,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 316 [2018-11-07 18:59:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:59:05,016 INFO L225 Difference]: With dead ends: 31806 [2018-11-07 18:59:05,016 INFO L226 Difference]: Without dead ends: 17135 [2018-11-07 18:59:05,064 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 666 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=500, Invalid=1950, Unknown=0, NotChecked=0, Total=2450 [2018-11-07 18:59:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17135 states. [2018-11-07 18:59:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17135 to 16653. [2018-11-07 18:59:05,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16653 states. [2018-11-07 18:59:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16653 states to 16653 states and 22134 transitions. [2018-11-07 18:59:05,467 INFO L78 Accepts]: Start accepts. Automaton has 16653 states and 22134 transitions. Word has length 316 [2018-11-07 18:59:05,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:59:05,467 INFO L480 AbstractCegarLoop]: Abstraction has 16653 states and 22134 transitions. [2018-11-07 18:59:05,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:59:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 16653 states and 22134 transitions. [2018-11-07 18:59:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-11-07 18:59:05,497 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:59:05,498 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:59:05,498 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:59:05,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:05,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1861984996, now seen corresponding path program 1 times [2018-11-07 18:59:05,499 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:59:05,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:05,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:05,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:05,500 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:06,238 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:59:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:59:06,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:06,515 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:59:06,515 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 350 with the following transitions: [2018-11-07 18:59:06,515 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [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], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:59:06,519 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:59:06,519 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:59:09,235 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:59:09,235 INFO L272 AbstractInterpreter]: Visited 189 different actions 565 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 18:59:09,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:09,244 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:59:09,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:09,244 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:59:09,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:09,254 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:59:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:09,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:59:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-07 18:59:09,647 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:59:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-07 18:59:09,764 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:59:09,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 18:59:09,764 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:59:09,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:59:09,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:59:09,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:59:09,766 INFO L87 Difference]: Start difference. First operand 16653 states and 22134 transitions. Second operand 3 states. [2018-11-07 18:59:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:59:11,247 INFO L93 Difference]: Finished difference Result 44423 states and 60068 transitions. [2018-11-07 18:59:11,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:59:11,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 349 [2018-11-07 18:59:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:59:11,333 INFO L225 Difference]: With dead ends: 44423 [2018-11-07 18:59:11,333 INFO L226 Difference]: Without dead ends: 28195 [2018-11-07 18:59:11,367 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:59:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28195 states. [2018-11-07 18:59:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28195 to 28155. [2018-11-07 18:59:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28155 states. [2018-11-07 18:59:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28155 states to 28155 states and 36977 transitions. [2018-11-07 18:59:11,908 INFO L78 Accepts]: Start accepts. Automaton has 28155 states and 36977 transitions. Word has length 349 [2018-11-07 18:59:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:59:11,910 INFO L480 AbstractCegarLoop]: Abstraction has 28155 states and 36977 transitions. [2018-11-07 18:59:11,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:59:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 28155 states and 36977 transitions. [2018-11-07 18:59:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-11-07 18:59:11,965 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:59:11,966 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:59:11,966 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:59:11,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash -542953889, now seen corresponding path program 1 times [2018-11-07 18:59:11,966 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:59:11,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:11,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:11,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:11,968 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:12,695 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:59:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 262 proven. 38 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-11-07 18:59:12,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:12,900 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:59:12,901 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 389 with the following transitions: [2018-11-07 18:59:12,901 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [139], [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], [260], [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], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:59:12,905 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:59:12,906 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:59:16,795 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:59:16,795 INFO L272 AbstractInterpreter]: Visited 190 different actions 754 times. Merged at 8 different actions 28 times. Never widened. Found 7 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 18:59:16,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:16,804 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:59:16,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:16,804 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:59:16,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:16,813 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:59:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:17,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:59:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 274 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-07 18:59:17,251 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:59:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 208 proven. 68 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-07 18:59:18,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:59:18,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-11-07 18:59:18,032 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:59:18,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 18:59:18,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 18:59:18,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:59:18,036 INFO L87 Difference]: Start difference. First operand 28155 states and 36977 transitions. Second operand 12 states. [2018-11-07 18:59:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:59:27,669 INFO L93 Difference]: Finished difference Result 91923 states and 125152 transitions. [2018-11-07 18:59:27,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-11-07 18:59:27,670 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 388 [2018-11-07 18:59:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:59:27,928 INFO L225 Difference]: With dead ends: 91923 [2018-11-07 18:59:27,928 INFO L226 Difference]: Without dead ends: 64191 [2018-11-07 18:59:28,022 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 828 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1085, Invalid=5235, Unknown=0, NotChecked=0, Total=6320 [2018-11-07 18:59:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64191 states. [2018-11-07 18:59:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64191 to 62944. [2018-11-07 18:59:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62944 states. [2018-11-07 18:59:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62944 states to 62944 states and 80309 transitions. [2018-11-07 18:59:29,426 INFO L78 Accepts]: Start accepts. Automaton has 62944 states and 80309 transitions. Word has length 388 [2018-11-07 18:59:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:59:29,427 INFO L480 AbstractCegarLoop]: Abstraction has 62944 states and 80309 transitions. [2018-11-07 18:59:29,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 18:59:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 62944 states and 80309 transitions. [2018-11-07 18:59:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-11-07 18:59:29,505 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:59:29,505 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:59:29,505 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:59:29,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:29,506 INFO L82 PathProgramCache]: Analyzing trace with hash 695166582, now seen corresponding path program 1 times [2018-11-07 18:59:29,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:59:29,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:29,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:29,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:29,507 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 239 proven. 20 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-11-07 18:59:30,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:30,159 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:59:30,159 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 419 with the following transitions: [2018-11-07 18:59:30,159 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [52], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [139], [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], [260], [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], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:59:30,165 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:59:30,165 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:59:34,155 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:59:34,156 INFO L272 AbstractInterpreter]: Visited 194 different actions 766 times. Merged at 9 different actions 30 times. Never widened. Found 8 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 18:59:34,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:34,158 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:59:34,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:34,159 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:59:34,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:34,168 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:59:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:34,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:59:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 303 proven. 4 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-07 18:59:34,594 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:59:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 263 proven. 44 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-07 18:59:35,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:59:35,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-11-07 18:59:35,184 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:59:35,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:59:35,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:59:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:59:35,186 INFO L87 Difference]: Start difference. First operand 62944 states and 80309 transitions. Second operand 8 states. [2018-11-07 18:59:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:59:41,674 INFO L93 Difference]: Finished difference Result 168517 states and 237898 transitions. [2018-11-07 18:59:41,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-07 18:59:41,675 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 418 [2018-11-07 18:59:41,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:59:42,340 INFO L225 Difference]: With dead ends: 168517 [2018-11-07 18:59:42,341 INFO L226 Difference]: Without dead ends: 121779 [2018-11-07 18:59:42,557 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 849 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2018-11-07 18:59:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121779 states. [2018-11-07 18:59:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121779 to 117689. [2018-11-07 18:59:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117689 states. [2018-11-07 18:59:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117689 states to 117689 states and 146545 transitions. [2018-11-07 18:59:46,405 INFO L78 Accepts]: Start accepts. Automaton has 117689 states and 146545 transitions. Word has length 418 [2018-11-07 18:59:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:59:46,405 INFO L480 AbstractCegarLoop]: Abstraction has 117689 states and 146545 transitions. [2018-11-07 18:59:46,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 18:59:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 117689 states and 146545 transitions. [2018-11-07 18:59:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-11-07 18:59:46,545 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:59:46,546 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:59:46,546 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:59:46,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash -145355276, now seen corresponding path program 1 times [2018-11-07 18:59:46,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:59:46,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:46,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:46,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:46,548 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:47,190 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 18:59:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 258 proven. 101 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-07 18:59:47,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:47,523 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:59:47,523 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 425 with the following transitions: [2018-11-07 18:59:47,523 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [491], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [933], [935], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:59:47,530 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:59:47,531 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:59:53,706 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:59:53,706 INFO L272 AbstractInterpreter]: Visited 191 different actions 760 times. Merged at 8 different actions 30 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 18:59:53,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:53,714 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:59:53,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:53,714 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:59:53,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:53,724 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:59:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:53,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:59:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 242 proven. 2 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-11-07 18:59:54,215 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:59:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 243 proven. 146 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-11-07 18:59:54,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:59:54,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-11-07 18:59:54,662 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:59:54,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 18:59:54,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 18:59:54,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:59:54,664 INFO L87 Difference]: Start difference. First operand 117689 states and 146545 transitions. Second operand 12 states. Received shutdown request... [2018-11-07 18:59:59,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-07 18:59:59,737 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:59:59,743 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:59:59,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:59:59 BoogieIcfgContainer [2018-11-07 18:59:59,743 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:59:59,744 INFO L168 Benchmark]: Toolchain (without parser) took 219033.25 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 972.0 MB in the end (delta: 427.3 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-11-07 18:59:59,745 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:59:59,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1261.02 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 18:59:59,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 212.72 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 720.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -843.7 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:59:59,748 INFO L168 Benchmark]: Boogie Preprocessor took 157.21 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:59:59,748 INFO L168 Benchmark]: RCFGBuilder took 5495.80 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 250.4 MB). Peak memory consumption was 250.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:59:59,749 INFO L168 Benchmark]: TraceAbstraction took 211901.79 ms. Allocated memory was 2.2 GB in the beginning and 3.8 GB in the end (delta: 1.6 GB). Free memory was 1.9 GB in the beginning and 972.0 MB in the end (delta: 936.0 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-11-07 18:59:59,756 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1261.02 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 212.72 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 720.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -843.7 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.21 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5495.80 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 250.4 MB). Peak memory consumption was 250.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211901.79 ms. Allocated memory was 2.2 GB in the beginning and 3.8 GB in the end (delta: 1.6 GB). Free memory was 1.9 GB in the beginning and 972.0 MB in the end (delta: 936.0 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1566]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1566). Cancelled while BasicCegarLoop was constructing difference of abstraction (117689states) and FLOYD_HOARE automaton (currently 47 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (4598 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 211.8s OverallTime, 14 OverallIterations, 6 TraceHistogramMax, 142.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3281 SDtfs, 24678 SDslu, 4333 SDs, 0 SdLazy, 34674 SolverSat, 8077 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87.7s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 6633 GetRequests, 6218 SyntacticMatches, 61 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 20.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117689occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 31.3s AbstIntTime, 11 AbstIntIterations, 2 AbstIntStrong, 0.9989729706370659 AbsIntWeakeningRatio, 0.33095238095238094 AbsIntAvgWeakeningVarsNumRemoved, 42.47857142857143 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.9s AutomataMinimizationTime, 13 MinimizatonAttempts, 6780 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 12.1s InterpolantComputationTime, 6758 NumberOfCodeBlocks, 6758 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 9606 ConstructedInterpolants, 0 QuantifiedInterpolants, 7148300 SizeOfPredicates, 31 NumberOfNonLiveVariables, 11515 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 32 InterpolantComputations, 9 PerfectInterpolantSequences, 5553/6106 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown