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/Problem15_label34_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:08:25,871 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:08:25,873 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:08:25,886 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:08:25,886 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:08:25,887 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:08:25,888 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:08:25,890 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:08:25,892 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:08:25,893 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:08:25,894 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:08:25,894 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:08:25,895 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:08:25,896 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:08:25,897 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:08:25,898 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:08:25,899 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:08:25,901 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:08:25,903 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:08:25,905 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:08:25,906 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:08:25,908 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:08:25,912 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:08:25,913 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:08:25,913 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:08:25,915 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:08:25,916 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:08:25,917 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:08:25,918 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:08:25,919 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:08:25,919 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:08:25,920 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:08:25,920 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:08:25,921 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:08:25,921 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:08:25,922 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:08:25,922 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 18:08:25,941 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:08:25,941 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:08:25,943 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:08:25,943 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:08:25,943 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:08:25,943 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:08:25,944 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:08:25,944 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:08:25,944 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:08:25,944 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:08:25,944 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:08:25,945 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:08:25,945 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:08:25,946 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:08:25,946 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:08:25,946 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:08:25,947 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:08:25,947 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:08:25,947 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:08:25,947 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:08:25,947 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:08:25,948 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:08:25,949 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:08:25,949 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:08:25,950 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:08:25,950 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:08:25,950 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:08:25,950 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:08:25,950 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:08:25,951 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:08:25,951 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:08:25,951 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:08:25,951 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:08:25,952 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:08:25,952 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:08:26,019 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:08:26,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:08:26,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:08:26,037 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:08:26,038 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:08:26,038 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label34_false-unreach-call.c [2018-11-07 18:08:26,107 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48278990e/90919b926690439896bd561001d96750/FLAG973c7987e [2018-11-07 18:08:26,818 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:08:26,821 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label34_false-unreach-call.c [2018-11-07 18:08:26,842 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48278990e/90919b926690439896bd561001d96750/FLAG973c7987e [2018-11-07 18:08:26,862 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48278990e/90919b926690439896bd561001d96750 [2018-11-07 18:08:26,874 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:08:26,875 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:08:26,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:08:26,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:08:26,880 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:08:26,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:08:26" (1/1) ... [2018-11-07 18:08:26,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9260898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:26, skipping insertion in model container [2018-11-07 18:08:26,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:08:26" (1/1) ... [2018-11-07 18:08:26,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:08:27,016 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:08:27,955 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:08:27,962 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:08:28,251 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:08:28,275 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:08:28,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28 WrapperNode [2018-11-07 18:08:28,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:08:28,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:08:28,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:08:28,278 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:08:28,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (1/1) ... [2018-11-07 18:08:28,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (1/1) ... [2018-11-07 18:08:28,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:08:28,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:08:28,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:08:28,514 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:08:28,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (1/1) ... [2018-11-07 18:08:28,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (1/1) ... [2018-11-07 18:08:28,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (1/1) ... [2018-11-07 18:08:28,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (1/1) ... [2018-11-07 18:08:28,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (1/1) ... [2018-11-07 18:08:28,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (1/1) ... [2018-11-07 18:08:28,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (1/1) ... [2018-11-07 18:08:28,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:08:28,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:08:28,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:08:28,715 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:08:28,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (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 18:08:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:08:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:08:28,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:08:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 18:08:28,795 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 18:08:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:08:28,795 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:08:28,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:08:28,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:08:28,796 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:08:28,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:08:35,778 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:08:35,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:08:35 BoogieIcfgContainer [2018-11-07 18:08:35,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:08:35,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:08:35,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:08:35,786 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:08:35,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:08:26" (1/3) ... [2018-11-07 18:08:35,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca4856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:08:35, skipping insertion in model container [2018-11-07 18:08:35,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:08:28" (2/3) ... [2018-11-07 18:08:35,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca4856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:08:35, skipping insertion in model container [2018-11-07 18:08:35,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:08:35" (3/3) ... [2018-11-07 18:08:35,789 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label34_false-unreach-call.c [2018-11-07 18:08:35,799 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:08:35,809 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:08:35,826 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:08:35,868 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:08:35,868 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:08:35,868 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:08:35,868 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:08:35,869 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:08:35,869 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:08:35,869 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:08:35,869 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:08:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-11-07 18:08:35,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-07 18:08:35,910 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:08:35,911 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] [2018-11-07 18:08:35,914 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:08:35,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:35,920 INFO L82 PathProgramCache]: Analyzing trace with hash 554449340, now seen corresponding path program 1 times [2018-11-07 18:08:35,923 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:08:35,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:35,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:35,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:35,979 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:08:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:36,344 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 18:08:36,346 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:08:36,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:08:36,347 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:08:36,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:08:36,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:08:36,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:08:36,373 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-11-07 18:08:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:08:42,783 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-11-07 18:08:42,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:08:42,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-11-07 18:08:42,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:08:42,814 INFO L225 Difference]: With dead ends: 1558 [2018-11-07 18:08:42,814 INFO L226 Difference]: Without dead ends: 1114 [2018-11-07 18:08:42,823 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:08:42,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-11-07 18:08:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1091. [2018-11-07 18:08:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2018-11-07 18:08:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1853 transitions. [2018-11-07 18:08:42,950 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1853 transitions. Word has length 20 [2018-11-07 18:08:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:08:42,950 INFO L480 AbstractCegarLoop]: Abstraction has 1091 states and 1853 transitions. [2018-11-07 18:08:42,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:08:42,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1853 transitions. [2018-11-07 18:08:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-07 18:08:42,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:08:42,956 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:08:42,957 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:08:42,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash 219727794, now seen corresponding path program 1 times [2018-11-07 18:08:42,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:08:42,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:42,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:42,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:42,959 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:08:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:08:43,281 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:08:43,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 18:08:43,282 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:08:43,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 18:08:43,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 18:08:43,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 18:08:43,286 INFO L87 Difference]: Start difference. First operand 1091 states and 1853 transitions. Second operand 5 states. [2018-11-07 18:08:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:08:49,280 INFO L93 Difference]: Finished difference Result 3243 states and 5585 transitions. [2018-11-07 18:08:49,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 18:08:49,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2018-11-07 18:08:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:08:49,299 INFO L225 Difference]: With dead ends: 3243 [2018-11-07 18:08:49,299 INFO L226 Difference]: Without dead ends: 2158 [2018-11-07 18:08:49,306 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:08:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2018-11-07 18:08:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2114. [2018-11-07 18:08:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2018-11-07 18:08:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3176 transitions. [2018-11-07 18:08:49,431 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3176 transitions. Word has length 93 [2018-11-07 18:08:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:08:49,431 INFO L480 AbstractCegarLoop]: Abstraction has 2114 states and 3176 transitions. [2018-11-07 18:08:49,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 18:08:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3176 transitions. [2018-11-07 18:08:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-07 18:08:49,439 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:08:49,439 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:08:49,439 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:08:49,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1955423070, now seen corresponding path program 1 times [2018-11-07 18:08:49,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:08:49,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:49,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:08:49,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:08:49,441 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:08:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:08:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:08:49,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:08:49,709 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:08:49,710 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 102 with the following transitions: [2018-11-07 18:08:49,712 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:08:49,759 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:08:49,759 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:08:50,233 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:08:50,238 INFO L272 AbstractInterpreter]: Visited 85 different actions 85 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 18:08:50,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:08:50,281 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:08:50,684 INFO L227 lantSequenceWeakener]: Weakened 95 states. On average, predicates are now at 77.27% of their original sizes. [2018-11-07 18:08:50,684 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:08:51,056 INFO L415 sIntCurrentIteration]: We unified 100 AI predicates to 100 [2018-11-07 18:08:51,057 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:08:51,059 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:08:51,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-07 18:08:51,059 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:08:51,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:08:51,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:08:51,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:08:51,062 INFO L87 Difference]: Start difference. First operand 2114 states and 3176 transitions. Second operand 7 states. [2018-11-07 18:08:53,318 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:09:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:09:20,592 INFO L93 Difference]: Finished difference Result 4532 states and 6731 transitions. [2018-11-07 18:09:20,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:09:20,594 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2018-11-07 18:09:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:09:20,612 INFO L225 Difference]: With dead ends: 4532 [2018-11-07 18:09:20,612 INFO L226 Difference]: Without dead ends: 2424 [2018-11-07 18:09:20,623 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 101 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:09:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2018-11-07 18:09:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2422. [2018-11-07 18:09:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2422 states. [2018-11-07 18:09:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 3492 transitions. [2018-11-07 18:09:20,695 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 3492 transitions. Word has length 101 [2018-11-07 18:09:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:09:20,696 INFO L480 AbstractCegarLoop]: Abstraction has 2422 states and 3492 transitions. [2018-11-07 18:09:20,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:09:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 3492 transitions. [2018-11-07 18:09:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-11-07 18:09:20,700 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:09:20,701 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 18:09:20,701 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:09:20,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:20,702 INFO L82 PathProgramCache]: Analyzing trace with hash -628352103, now seen corresponding path program 1 times [2018-11-07 18:09:20,702 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:09:20,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:20,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:09:20,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:09:20,703 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:09:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:09:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:09:22,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:09:22,594 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:09:22,594 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 198 with the following transitions: [2018-11-07 18:09:22,595 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:09:22,601 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:09:22,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:09:22,663 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:09:23,235 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:09:23,236 INFO L272 AbstractInterpreter]: Visited 104 different actions 692 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:09:23,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:09:23,246 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:09:23,797 INFO L227 lantSequenceWeakener]: Weakened 26 states. On average, predicates are now at 77.62% of their original sizes. [2018-11-07 18:09:23,797 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:09:26,847 INFO L415 sIntCurrentIteration]: We unified 196 AI predicates to 196 [2018-11-07 18:09:26,847 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:09:26,847 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:09:26,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [11] total 24 [2018-11-07 18:09:26,848 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:09:26,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 18:09:26,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 18:09:26,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:09:26,850 INFO L87 Difference]: Start difference. First operand 2422 states and 3492 transitions. Second operand 15 states. [2018-11-07 18:10:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:10:03,605 INFO L93 Difference]: Finished difference Result 5998 states and 8424 transitions. [2018-11-07 18:10:03,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-07 18:10:03,606 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 197 [2018-11-07 18:10:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:10:03,624 INFO L225 Difference]: With dead ends: 5998 [2018-11-07 18:10:03,624 INFO L226 Difference]: Without dead ends: 3890 [2018-11-07 18:10:03,633 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 202 GetRequests, 78 SyntacticMatches, 105 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:10:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2018-11-07 18:10:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3360. [2018-11-07 18:10:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3360 states. [2018-11-07 18:10:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4475 transitions. [2018-11-07 18:10:03,721 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4475 transitions. Word has length 197 [2018-11-07 18:10:03,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:10:03,722 INFO L480 AbstractCegarLoop]: Abstraction has 3360 states and 4475 transitions. [2018-11-07 18:10:03,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 18:10:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4475 transitions. [2018-11-07 18:10:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-11-07 18:10:03,728 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:10:03,728 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:03,729 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:10:03,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:10:03,729 INFO L82 PathProgramCache]: Analyzing trace with hash 226665810, now seen corresponding path program 1 times [2018-11-07 18:10:03,729 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:10:03,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:03,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:10:03,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:03,731 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:10:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:10:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:10:03,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:10:03,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:10:03,981 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:10:03,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:10:03,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:10:03,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:10:03,983 INFO L87 Difference]: Start difference. First operand 3360 states and 4475 transitions. Second operand 3 states. [2018-11-07 18:10:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:10:07,257 INFO L93 Difference]: Finished difference Result 7345 states and 10713 transitions. [2018-11-07 18:10:07,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:10:07,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 307 [2018-11-07 18:10:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:10:07,289 INFO L225 Difference]: With dead ends: 7345 [2018-11-07 18:10:07,289 INFO L226 Difference]: Without dead ends: 5237 [2018-11-07 18:10:07,308 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:10:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2018-11-07 18:10:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 5234. [2018-11-07 18:10:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5234 states. [2018-11-07 18:10:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6699 transitions. [2018-11-07 18:10:07,432 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6699 transitions. Word has length 307 [2018-11-07 18:10:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:10:07,433 INFO L480 AbstractCegarLoop]: Abstraction has 5234 states and 6699 transitions. [2018-11-07 18:10:07,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:10:07,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6699 transitions. [2018-11-07 18:10:07,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-11-07 18:10:07,441 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:10:07,442 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:07,442 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:10:07,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:10:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1802299581, now seen corresponding path program 1 times [2018-11-07 18:10:07,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:10:07,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:07,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:10:07,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:07,444 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:10:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:10:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 18:10:08,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:10:08,009 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:10:08,009 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 378 with the following transitions: [2018-11-07 18:10:08,010 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [566], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1562], [1566], [1570], [1581], [1585], [1589], [1593], [1597], [1601], [1612], [1616], [1620], [1623], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:10:08,027 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:10:08,028 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:10:08,221 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:10:08,645 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:10:08,645 INFO L272 AbstractInterpreter]: Visited 295 different actions 884 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:10:08,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:10:08,659 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:10:09,061 INFO L227 lantSequenceWeakener]: Weakened 374 states. On average, predicates are now at 80.05% of their original sizes. [2018-11-07 18:10:09,061 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:10:09,162 INFO L415 sIntCurrentIteration]: We unified 376 AI predicates to 376 [2018-11-07 18:10:09,163 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:10:09,163 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:10:09,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 18:10:09,163 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:10:09,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:10:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:10:09,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:10:09,165 INFO L87 Difference]: Start difference. First operand 5234 states and 6699 transitions. Second operand 10 states. [2018-11-07 18:10:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:10:26,581 INFO L93 Difference]: Finished difference Result 11426 states and 14733 transitions. [2018-11-07 18:10:26,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:10:26,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 377 [2018-11-07 18:10:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:10:26,614 INFO L225 Difference]: With dead ends: 11426 [2018-11-07 18:10:26,614 INFO L226 Difference]: Without dead ends: 7444 [2018-11-07 18:10:26,635 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 383 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-11-07 18:10:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7444 states. [2018-11-07 18:10:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7444 to 7438. [2018-11-07 18:10:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7438 states. [2018-11-07 18:10:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 9142 transitions. [2018-11-07 18:10:26,803 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 9142 transitions. Word has length 377 [2018-11-07 18:10:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:10:26,804 INFO L480 AbstractCegarLoop]: Abstraction has 7438 states and 9142 transitions. [2018-11-07 18:10:26,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:10:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 9142 transitions. [2018-11-07 18:10:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-11-07 18:10:26,813 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:10:26,813 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:26,814 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:10:26,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:10:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash -428709108, now seen corresponding path program 1 times [2018-11-07 18:10:26,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:10:26,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:26,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:10:26,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:26,816 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:10:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:10:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:10:27,132 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:10:27,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:10:27,132 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:10:27,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:10:27,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:10:27,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:10:27,134 INFO L87 Difference]: Start difference. First operand 7438 states and 9142 transitions. Second operand 3 states. [2018-11-07 18:10:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:10:29,244 INFO L93 Difference]: Finished difference Result 13283 states and 17716 transitions. [2018-11-07 18:10:29,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:10:29,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 407 [2018-11-07 18:10:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:10:29,300 INFO L225 Difference]: With dead ends: 13283 [2018-11-07 18:10:29,301 INFO L226 Difference]: Without dead ends: 9301 [2018-11-07 18:10:29,339 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:10:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9301 states. [2018-11-07 18:10:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9301 to 9298. [2018-11-07 18:10:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9298 states. [2018-11-07 18:10:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9298 states to 9298 states and 11378 transitions. [2018-11-07 18:10:29,569 INFO L78 Accepts]: Start accepts. Automaton has 9298 states and 11378 transitions. Word has length 407 [2018-11-07 18:10:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:10:29,570 INFO L480 AbstractCegarLoop]: Abstraction has 9298 states and 11378 transitions. [2018-11-07 18:10:29,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:10:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 9298 states and 11378 transitions. [2018-11-07 18:10:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2018-11-07 18:10:29,589 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:10:29,589 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:29,589 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:10:29,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:10:29,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1271737079, now seen corresponding path program 1 times [2018-11-07 18:10:29,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:10:29,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:29,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:10:29,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:29,591 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:10:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:10:30,053 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:10:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 30 proven. 189 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-07 18:10:30,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:10:30,547 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:10:30,547 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 478 with the following transitions: [2018-11-07 18:10:30,548 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [566], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:10:30,556 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:10:30,556 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:10:30,724 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:10:32,316 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:10:32,316 INFO L272 AbstractInterpreter]: Visited 284 different actions 1405 times. Merged at 8 different actions 29 times. Never widened. Found 9 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:10:32,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:10:32,323 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:10:32,790 INFO L227 lantSequenceWeakener]: Weakened 474 states. On average, predicates are now at 83.36% of their original sizes. [2018-11-07 18:10:32,790 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:10:32,889 INFO L415 sIntCurrentIteration]: We unified 476 AI predicates to 476 [2018-11-07 18:10:32,889 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:10:32,889 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:10:32,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 18:10:32,890 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:10:32,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:10:32,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:10:32,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:10:32,891 INFO L87 Difference]: Start difference. First operand 9298 states and 11378 transitions. Second operand 10 states. [2018-11-07 18:10:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:10:46,851 INFO L93 Difference]: Finished difference Result 20945 states and 26908 transitions. [2018-11-07 18:10:46,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:10:46,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 477 [2018-11-07 18:10:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:10:46,902 INFO L225 Difference]: With dead ends: 20945 [2018-11-07 18:10:46,902 INFO L226 Difference]: Without dead ends: 15103 [2018-11-07 18:10:46,925 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 484 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:10:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2018-11-07 18:10:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 15034. [2018-11-07 18:10:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15034 states. [2018-11-07 18:10:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15034 states to 15034 states and 18669 transitions. [2018-11-07 18:10:47,233 INFO L78 Accepts]: Start accepts. Automaton has 15034 states and 18669 transitions. Word has length 477 [2018-11-07 18:10:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:10:47,234 INFO L480 AbstractCegarLoop]: Abstraction has 15034 states and 18669 transitions. [2018-11-07 18:10:47,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:10:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 15034 states and 18669 transitions. [2018-11-07 18:10:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2018-11-07 18:10:47,259 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:10:47,260 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:47,260 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:10:47,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:10:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1582871640, now seen corresponding path program 1 times [2018-11-07 18:10:47,261 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:10:47,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:47,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:10:47,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:10:47,265 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:10:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:10:47,735 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:10:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 30 proven. 201 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 18:10:48,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:10:48,641 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:10:48,641 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 490 with the following transitions: [2018-11-07 18:10:48,642 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [621], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:10:48,647 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:10:48,647 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:10:48,799 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:10:50,878 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:10:50,878 INFO L272 AbstractInterpreter]: Visited 284 different actions 1695 times. Merged at 8 different actions 46 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:10:50,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:10:50,881 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:10:51,358 INFO L227 lantSequenceWeakener]: Weakened 486 states. On average, predicates are now at 80.04% of their original sizes. [2018-11-07 18:10:51,358 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:10:51,499 INFO L415 sIntCurrentIteration]: We unified 488 AI predicates to 488 [2018-11-07 18:10:51,499 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:10:51,499 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:10:51,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 18:10:51,500 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:10:51,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:10:51,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:10:51,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:10:51,501 INFO L87 Difference]: Start difference. First operand 15034 states and 18669 transitions. Second operand 10 states. [2018-11-07 18:11:11,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:11:11,218 INFO L93 Difference]: Finished difference Result 32611 states and 42715 transitions. [2018-11-07 18:11:11,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:11:11,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 489 [2018-11-07 18:11:11,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:11:11,312 INFO L225 Difference]: With dead ends: 32611 [2018-11-07 18:11:11,313 INFO L226 Difference]: Without dead ends: 23861 [2018-11-07 18:11:11,349 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 496 GetRequests, 472 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:11:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2018-11-07 18:11:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 23724. [2018-11-07 18:11:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23724 states. [2018-11-07 18:11:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23724 states to 23724 states and 30260 transitions. [2018-11-07 18:11:11,879 INFO L78 Accepts]: Start accepts. Automaton has 23724 states and 30260 transitions. Word has length 489 [2018-11-07 18:11:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:11:11,880 INFO L480 AbstractCegarLoop]: Abstraction has 23724 states and 30260 transitions. [2018-11-07 18:11:11,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:11:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 23724 states and 30260 transitions. [2018-11-07 18:11:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2018-11-07 18:11:11,910 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:11:11,910 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:11:11,911 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:11:11,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:11:11,911 INFO L82 PathProgramCache]: Analyzing trace with hash -294674237, now seen corresponding path program 1 times [2018-11-07 18:11:11,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:11:11,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:11:11,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:11:11,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:11:11,913 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:11:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:11:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2018-11-07 18:11:13,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:11:13,401 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:11:13,401 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 561 with the following transitions: [2018-11-07 18:11:13,401 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [566], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [625], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:11:13,406 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:11:13,406 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:11:13,651 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:11:15,090 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:11:15,090 INFO L272 AbstractInterpreter]: Visited 286 different actions 1705 times. Merged at 9 different actions 48 times. Widened at 1 different actions 1 times. Found 14 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:11:15,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:11:15,105 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:11:15,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:11:15,105 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 18:11:15,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:11:15,115 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:11:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:11:15,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:11:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2018-11-07 18:11:15,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:11:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2018-11-07 18:11:22,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:11:22,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-07 18:11:22,433 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:11:22,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:11:22,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:11:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:11:22,437 INFO L87 Difference]: Start difference. First operand 23724 states and 30260 transitions. Second operand 8 states. [2018-11-07 18:11:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:11:33,503 INFO L93 Difference]: Finished difference Result 75624 states and 101576 transitions. [2018-11-07 18:11:33,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-07 18:11:33,507 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 560 [2018-11-07 18:11:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:11:33,748 INFO L225 Difference]: With dead ends: 75624 [2018-11-07 18:11:33,748 INFO L226 Difference]: Without dead ends: 53477 [2018-11-07 18:11:33,881 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1177 GetRequests, 1140 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2018-11-07 18:11:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53477 states. [2018-11-07 18:11:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53477 to 52344. [2018-11-07 18:11:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52344 states. [2018-11-07 18:11:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52344 states to 52344 states and 60789 transitions. [2018-11-07 18:11:35,462 INFO L78 Accepts]: Start accepts. Automaton has 52344 states and 60789 transitions. Word has length 560 [2018-11-07 18:11:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:11:35,463 INFO L480 AbstractCegarLoop]: Abstraction has 52344 states and 60789 transitions. [2018-11-07 18:11:35,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 18:11:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 52344 states and 60789 transitions. [2018-11-07 18:11:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2018-11-07 18:11:35,488 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:11:35,488 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:11:35,489 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:11:35,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:11:35,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1151241394, now seen corresponding path program 1 times [2018-11-07 18:11:35,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:11:35,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:11:35,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:11:35,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:11:35,491 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:11:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:11:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-11-07 18:11:36,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:11:36,831 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:11:36,832 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 571 with the following transitions: [2018-11-07 18:11:36,832 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1167], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:11:36,841 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:11:36,841 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:11:37,350 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:11:39,034 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:11:39,035 INFO L272 AbstractInterpreter]: Visited 285 different actions 1418 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:11:39,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:11:39,073 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:11:39,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:11:39,073 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 18:11:39,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:11:39,087 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:11:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:11:39,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:11:44,779 WARN L179 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-11-07 18:11:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-11-07 18:11:45,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:11:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-11-07 18:11:46,143 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 18:11:46,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 9 [2018-11-07 18:11:46,143 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:11:46,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:11:46,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:11:46,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=47, Unknown=2, NotChecked=0, Total=72 [2018-11-07 18:11:46,145 INFO L87 Difference]: Start difference. First operand 52344 states and 60789 transitions. Second operand 3 states. [2018-11-07 18:11:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:11:49,125 INFO L93 Difference]: Finished difference Result 89853 states and 107037 transitions. [2018-11-07 18:11:49,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:11:49,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 570 [2018-11-07 18:11:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:11:49,284 INFO L225 Difference]: With dead ends: 89853 [2018-11-07 18:11:49,284 INFO L226 Difference]: Without dead ends: 45870 [2018-11-07 18:11:49,381 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 1141 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=23, Invalid=47, Unknown=2, NotChecked=0, Total=72 [2018-11-07 18:11:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45870 states. [2018-11-07 18:11:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45870 to 45870. [2018-11-07 18:11:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45870 states. [2018-11-07 18:11:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45870 states to 45870 states and 54221 transitions. [2018-11-07 18:11:50,145 INFO L78 Accepts]: Start accepts. Automaton has 45870 states and 54221 transitions. Word has length 570 [2018-11-07 18:11:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:11:50,146 INFO L480 AbstractCegarLoop]: Abstraction has 45870 states and 54221 transitions. [2018-11-07 18:11:50,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:11:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 45870 states and 54221 transitions. [2018-11-07 18:11:50,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2018-11-07 18:11:50,169 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:11:50,170 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:11:50,170 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:11:50,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:11:50,170 INFO L82 PathProgramCache]: Analyzing trace with hash -279537587, now seen corresponding path program 1 times [2018-11-07 18:11:50,171 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:11:50,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:11:50,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:11:50,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:11:50,172 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:11:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-11-07 18:11:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 93 proven. 334 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-07 18:11:52,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:11:52,374 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:11:52,375 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 574 with the following transitions: [2018-11-07 18:11:52,375 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1048], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 18:11:52,379 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:11:52,380 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:11:52,381 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-07 18:11:52,381 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-07 18:11:52,382 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 18:11:52,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:11:52,382 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 18:11:52,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:11:52,392 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:11:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:11:52,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:11:52,592 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 18:11:52,793 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:11:52,794 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:11:52,800 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:11:52,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:11:52 BoogieIcfgContainer [2018-11-07 18:11:52,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:11:52,801 INFO L168 Benchmark]: Toolchain (without parser) took 205926.33 ms. Allocated memory was 1.5 GB in the beginning and 5.5 GB in the end (delta: 4.0 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-07 18:11:52,802 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:11:52,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1400.23 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: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:11:52,803 INFO L168 Benchmark]: Boogie Procedure Inliner took 235.39 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -882.0 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:11:52,804 INFO L168 Benchmark]: Boogie Preprocessor took 201.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2018-11-07 18:11:52,805 INFO L168 Benchmark]: RCFGBuilder took 7064.68 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 285.8 MB). Peak memory consumption was 285.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:11:52,806 INFO L168 Benchmark]: TraceAbstraction took 197019.88 ms. Allocated memory was 2.3 GB in the beginning and 5.5 GB in the end (delta: 3.2 GB). Free memory was 1.9 GB in the beginning and 3.4 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-11-07 18:11:52,813 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1400.23 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: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 235.39 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 737.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -882.0 MB). Peak memory consumption was 31.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 201.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7064.68 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 285.8 MB). Peak memory consumption was 285.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 197019.88 ms. Allocated memory was 2.3 GB in the beginning and 5.5 GB in the end (delta: 3.2 GB). Free memory was 1.9 GB in the beginning and 3.4 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 46). Cancelled while BasicCegarLoop was analyzing trace of length 574 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 14 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 196.9s OverallTime, 12 OverallIterations, 5 TraceHistogramMax, 150.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4538 SDtfs, 16749 SDslu, 3402 SDs, 0 SdLazy, 24768 SolverSat, 5030 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.3s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 4018 GetRequests, 3775 SyntacticMatches, 119 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52344occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.8s AbstIntTime, 8 AbstIntIterations, 5 AbstIntStrong, 0.9974889769113029 AbsIntWeakeningRatio, 0.08312958435207823 AbsIntAvgWeakeningVarsNumRemoved, 18.04156479217604 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 1950 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 20.0s InterpolantComputationTime, 4728 NumberOfCodeBlocks, 4728 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 5843 ConstructedInterpolants, 2 QuantifiedInterpolants, 7798895 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1606 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 3244/3791 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown