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/Problem14_label13_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 17:58:52,888 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 17:58:52,890 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 17:58:52,902 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 17:58:52,902 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 17:58:52,903 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 17:58:52,905 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 17:58:52,907 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 17:58:52,908 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 17:58:52,909 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 17:58:52,910 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 17:58:52,910 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 17:58:52,911 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 17:58:52,912 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 17:58:52,914 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 17:58:52,914 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 17:58:52,916 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 17:58:52,919 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 17:58:52,925 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 17:58:52,931 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 17:58:52,932 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 17:58:52,937 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 17:58:52,939 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 17:58:52,939 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 17:58:52,939 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 17:58:52,940 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 17:58:52,941 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 17:58:52,942 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 17:58:52,943 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 17:58:52,944 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 17:58:52,944 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 17:58:52,945 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 17:58:52,945 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 17:58:52,945 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 17:58:52,946 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 17:58:52,947 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 17:58:52,947 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 17:58:52,963 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 17:58:52,963 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 17:58:52,964 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 17:58:52,964 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 17:58:52,964 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 17:58:52,964 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 17:58:52,965 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 17:58:52,965 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 17:58:52,965 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 17:58:52,965 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 17:58:52,965 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 17:58:52,966 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 17:58:52,966 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 17:58:52,966 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 17:58:52,967 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 17:58:52,967 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 17:58:52,967 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 17:58:52,967 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 17:58:52,967 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 17:58:52,968 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 17:58:52,968 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 17:58:52,968 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 17:58:52,968 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 17:58:52,968 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 17:58:52,969 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 17:58:52,969 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 17:58:52,969 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 17:58:52,969 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 17:58:52,969 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 17:58:52,970 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 17:58:52,970 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 17:58:52,970 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 17:58:52,970 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 17:58:52,970 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 17:58:52,970 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 17:58:53,014 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 17:58:53,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 17:58:53,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 17:58:53,034 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 17:58:53,034 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 17:58:53,035 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label13_false-unreach-call_false-termination.c [2018-11-07 17:58:53,099 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3785a52/d9bf6d29653c41c7b32000a9a2fe85cf/FLAG3394a8b7f [2018-11-07 17:58:53,709 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 17:58:53,710 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label13_false-unreach-call_false-termination.c [2018-11-07 17:58:53,733 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3785a52/d9bf6d29653c41c7b32000a9a2fe85cf/FLAG3394a8b7f [2018-11-07 17:58:53,751 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3785a52/d9bf6d29653c41c7b32000a9a2fe85cf [2018-11-07 17:58:53,763 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 17:58:53,765 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 17:58:53,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 17:58:53,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 17:58:53,775 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 17:58:53,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:58:53" (1/1) ... [2018-11-07 17:58:53,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e88097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:53, skipping insertion in model container [2018-11-07 17:58:53,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:58:53" (1/1) ... [2018-11-07 17:58:53,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 17:58:53,879 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 17:58:54,417 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 17:58:54,422 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 17:58:54,558 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 17:58:54,582 INFO L193 MainTranslator]: Completed translation [2018-11-07 17:58:54,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54 WrapperNode [2018-11-07 17:58:54,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 17:58:54,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 17:58:54,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 17:58:54,586 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 17:58:54,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (1/1) ... [2018-11-07 17:58:54,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (1/1) ... [2018-11-07 17:58:54,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 17:58:54,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 17:58:54,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 17:58:54,730 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 17:58:54,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (1/1) ... [2018-11-07 17:58:54,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (1/1) ... [2018-11-07 17:58:54,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (1/1) ... [2018-11-07 17:58:54,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (1/1) ... [2018-11-07 17:58:54,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (1/1) ... [2018-11-07 17:58:54,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (1/1) ... [2018-11-07 17:58:54,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (1/1) ... [2018-11-07 17:58:54,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 17:58:54,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 17:58:54,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 17:58:54,839 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 17:58:54,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (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 17:58:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 17:58:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 17:58:54,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 17:58:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 17:58:54,916 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 17:58:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 17:58:54,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 17:58:54,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 17:58:54,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 17:58:58,376 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 17:58:58,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:58:58 BoogieIcfgContainer [2018-11-07 17:58:58,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 17:58:58,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 17:58:58,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 17:58:58,382 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 17:58:58,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:58:53" (1/3) ... [2018-11-07 17:58:58,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fccd2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:58:58, skipping insertion in model container [2018-11-07 17:58:58,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:58:54" (2/3) ... [2018-11-07 17:58:58,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fccd2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:58:58, skipping insertion in model container [2018-11-07 17:58:58,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:58:58" (3/3) ... [2018-11-07 17:58:58,386 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label13_false-unreach-call_false-termination.c [2018-11-07 17:58:58,396 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 17:58:58,405 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 17:58:58,422 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 17:58:58,462 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 17:58:58,462 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 17:58:58,462 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 17:58:58,462 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 17:58:58,462 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 17:58:58,463 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 17:58:58,463 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 17:58:58,463 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 17:58:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 17:58:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-07 17:58:58,499 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:58:58,500 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:58:58,503 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:58:58,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:58:58,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1859951889, now seen corresponding path program 1 times [2018-11-07 17:58:58,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:58:58,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:58,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:58:58,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:58:58,568 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:58:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:58:58,934 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 17:58:58,938 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:58:58,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 17:58:58,938 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:58:58,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 17:58:58,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 17:58:58,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 17:58:58,967 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 17:59:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:59:00,719 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 17:59:00,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 17:59:00,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2018-11-07 17:59:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:59:00,742 INFO L225 Difference]: With dead ends: 691 [2018-11-07 17:59:00,743 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 17:59:00,751 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 17:59:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 17:59:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 17:59:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 17:59:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 17:59:00,883 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 31 [2018-11-07 17:59:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:59:00,884 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 17:59:00,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 17:59:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 17:59:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-07 17:59:00,893 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:59:00,896 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:00,896 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:59:00,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:00,898 INFO L82 PathProgramCache]: Analyzing trace with hash -984490100, now seen corresponding path program 1 times [2018-11-07 17:59:00,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:59:00,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:00,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:59:00,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:00,901 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:59:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:59:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:59:01,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:59:01,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 17:59:01,308 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:59:01,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 17:59:01,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 17:59:01,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 17:59:01,311 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 17:59:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:59:05,068 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-11-07 17:59:05,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 17:59:05,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2018-11-07 17:59:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:59:05,081 INFO L225 Difference]: With dead ends: 1588 [2018-11-07 17:59:05,081 INFO L226 Difference]: Without dead ends: 1160 [2018-11-07 17:59:05,087 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 17:59:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-11-07 17:59:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-11-07 17:59:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-11-07 17:59:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-11-07 17:59:05,160 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 101 [2018-11-07 17:59:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:59:05,161 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-11-07 17:59:05,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 17:59:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-11-07 17:59:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-07 17:59:05,166 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:59:05,166 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:05,166 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:59:05,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:05,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1471379143, now seen corresponding path program 1 times [2018-11-07 17:59:05,167 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:59:05,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:05,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:59:05,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:05,169 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:59:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:59:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:59:05,502 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:59:05,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 17:59:05,502 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:59:05,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 17:59:05,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 17:59:05,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 17:59:05,503 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-11-07 17:59:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:59:08,047 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-11-07 17:59:08,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 17:59:08,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2018-11-07 17:59:08,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:59:08,063 INFO L225 Difference]: With dead ends: 2716 [2018-11-07 17:59:08,064 INFO L226 Difference]: Without dead ends: 1569 [2018-11-07 17:59:08,069 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 17:59:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-11-07 17:59:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-11-07 17:59:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-11-07 17:59:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-11-07 17:59:08,126 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 102 [2018-11-07 17:59:08,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:59:08,127 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-11-07 17:59:08,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 17:59:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-11-07 17:59:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-07 17:59:08,129 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:59:08,130 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:08,130 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:59:08,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:08,130 INFO L82 PathProgramCache]: Analyzing trace with hash -552645141, now seen corresponding path program 1 times [2018-11-07 17:59:08,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:59:08,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:08,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:59:08,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:08,132 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:59:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:59:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:59:08,305 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:59:08,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 17:59:08,305 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:59:08,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 17:59:08,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 17:59:08,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 17:59:08,307 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-11-07 17:59:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:59:11,026 INFO L93 Difference]: Finished difference Result 4198 states and 6461 transitions. [2018-11-07 17:59:11,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 17:59:11,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2018-11-07 17:59:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:59:11,054 INFO L225 Difference]: With dead ends: 4198 [2018-11-07 17:59:11,054 INFO L226 Difference]: Without dead ends: 2666 [2018-11-07 17:59:11,065 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 17:59:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2018-11-07 17:59:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2560. [2018-11-07 17:59:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2560 states. [2018-11-07 17:59:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3629 transitions. [2018-11-07 17:59:11,145 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3629 transitions. Word has length 104 [2018-11-07 17:59:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:59:11,146 INFO L480 AbstractCegarLoop]: Abstraction has 2560 states and 3629 transitions. [2018-11-07 17:59:11,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 17:59:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3629 transitions. [2018-11-07 17:59:11,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-07 17:59:11,148 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:59:11,148 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:11,149 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:59:11,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:11,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1700956756, now seen corresponding path program 1 times [2018-11-07 17:59:11,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:59:11,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:11,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:59:11,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:11,151 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:59:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:59:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:59:11,291 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:59:11,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 17:59:11,291 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:59:11,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 17:59:11,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 17:59:11,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 17:59:11,292 INFO L87 Difference]: Start difference. First operand 2560 states and 3629 transitions. Second operand 4 states. [2018-11-07 17:59:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:59:13,388 INFO L93 Difference]: Finished difference Result 7205 states and 10610 transitions. [2018-11-07 17:59:13,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 17:59:13,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2018-11-07 17:59:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:59:13,453 INFO L225 Difference]: With dead ends: 7205 [2018-11-07 17:59:13,453 INFO L226 Difference]: Without dead ends: 4651 [2018-11-07 17:59:13,469 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 17:59:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2018-11-07 17:59:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651. [2018-11-07 17:59:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4651 states. [2018-11-07 17:59:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 6458 transitions. [2018-11-07 17:59:13,592 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 6458 transitions. Word has length 105 [2018-11-07 17:59:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:59:13,592 INFO L480 AbstractCegarLoop]: Abstraction has 4651 states and 6458 transitions. [2018-11-07 17:59:13,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 17:59:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 6458 transitions. [2018-11-07 17:59:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-11-07 17:59:13,608 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:59:13,608 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 17:59:13,609 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:59:13,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1300699199, now seen corresponding path program 1 times [2018-11-07 17:59:13,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:59:13,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:13,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:59:13,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:13,611 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:59:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:59:14,637 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2018-11-07 17:59:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:59:14,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:59:14,823 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:59:14,824 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 250 with the following transitions: [2018-11-07 17:59:14,826 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 17:59:14,874 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:59:14,875 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:59:15,458 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:59:15,463 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:59:15,466 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 17:59:15,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:15,508 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:59:16,113 INFO L227 lantSequenceWeakener]: Weakened 240 states. On average, predicates are now at 77.51% of their original sizes. [2018-11-07 17:59:16,114 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:59:16,468 INFO L415 sIntCurrentIteration]: We unified 248 AI predicates to 248 [2018-11-07 17:59:16,469 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:59:16,474 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:59:16,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2018-11-07 17:59:16,474 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:59:16,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 17:59:16,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 17:59:16,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 17:59:16,476 INFO L87 Difference]: Start difference. First operand 4651 states and 6458 transitions. Second operand 7 states. [2018-11-07 17:59:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:59:31,882 INFO L93 Difference]: Finished difference Result 9481 states and 13140 transitions. [2018-11-07 17:59:31,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 17:59:31,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 249 [2018-11-07 17:59:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:59:31,907 INFO L225 Difference]: With dead ends: 9481 [2018-11-07 17:59:31,907 INFO L226 Difference]: Without dead ends: 4836 [2018-11-07 17:59:31,927 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 249 GetRequests, 243 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 17:59:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2018-11-07 17:59:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4834. [2018-11-07 17:59:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4834 states. [2018-11-07 17:59:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4834 states to 4834 states and 6649 transitions. [2018-11-07 17:59:32,055 INFO L78 Accepts]: Start accepts. Automaton has 4834 states and 6649 transitions. Word has length 249 [2018-11-07 17:59:32,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:59:32,056 INFO L480 AbstractCegarLoop]: Abstraction has 4834 states and 6649 transitions. [2018-11-07 17:59:32,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 17:59:32,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4834 states and 6649 transitions. [2018-11-07 17:59:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-11-07 17:59:32,074 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:59:32,075 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:59:32,075 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:59:32,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1735802637, now seen corresponding path program 1 times [2018-11-07 17:59:32,076 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:59:32,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:32,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:59:32,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:32,077 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:59:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:59:32,965 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 17:59:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 160 proven. 182 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 17:59:33,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:59:33,545 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:59:33,545 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 335 with the following transitions: [2018-11-07 17:59:33,546 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 17:59:33,551 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:59:33,551 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:59:33,679 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:59:33,777 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:59:33,777 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 17:59:33,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:33,816 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:59:34,376 INFO L227 lantSequenceWeakener]: Weakened 119 states. On average, predicates are now at 78.09% of their original sizes. [2018-11-07 17:59:34,376 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:59:35,928 INFO L415 sIntCurrentIteration]: We unified 333 AI predicates to 333 [2018-11-07 17:59:35,928 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:59:35,928 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:59:35,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [12] total 35 [2018-11-07 17:59:35,929 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:59:35,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-07 17:59:35,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-07 17:59:35,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-11-07 17:59:35,930 INFO L87 Difference]: Start difference. First operand 4834 states and 6649 transitions. Second operand 25 states. [2018-11-07 17:59:57,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:59:57,518 INFO L93 Difference]: Finished difference Result 9819 states and 13446 transitions. [2018-11-07 17:59:57,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-07 17:59:57,518 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 334 [2018-11-07 17:59:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:59:57,541 INFO L225 Difference]: With dead ends: 9819 [2018-11-07 17:59:57,541 INFO L226 Difference]: Without dead ends: 4839 [2018-11-07 17:59:57,559 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 348 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2018-11-07 17:59:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2018-11-07 17:59:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 4834. [2018-11-07 17:59:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4834 states. [2018-11-07 17:59:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4834 states to 4834 states and 6643 transitions. [2018-11-07 17:59:57,683 INFO L78 Accepts]: Start accepts. Automaton has 4834 states and 6643 transitions. Word has length 334 [2018-11-07 17:59:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:59:57,684 INFO L480 AbstractCegarLoop]: Abstraction has 4834 states and 6643 transitions. [2018-11-07 17:59:57,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-07 17:59:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4834 states and 6643 transitions. [2018-11-07 17:59:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-11-07 17:59:57,705 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:59:57,706 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:59:57,706 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:59:57,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1103940409, now seen corresponding path program 1 times [2018-11-07 17:59:57,707 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:59:57,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:57,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:59:57,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:59:57,708 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:59:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:59:58,203 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 17:59:58,405 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 17:59:58,629 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 17:59:58,996 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 17:59:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 85 proven. 303 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 17:59:59,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:59:59,733 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:59:59,734 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 361 with the following transitions: [2018-11-07 17:59:59,734 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 17:59:59,738 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:59:59,738 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:59:59,798 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:59:59,883 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:59:59,883 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 17:59:59,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:59:59,889 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:00:00,307 INFO L227 lantSequenceWeakener]: Weakened 135 states. On average, predicates are now at 78.08% of their original sizes. [2018-11-07 18:00:00,307 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:00:00,773 INFO L415 sIntCurrentIteration]: We unified 359 AI predicates to 359 [2018-11-07 18:00:00,774 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:00:00,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:00:00,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-07 18:00:00,775 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:00:00,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 18:00:00,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 18:00:00,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:00:00,777 INFO L87 Difference]: Start difference. First operand 4834 states and 6643 transitions. Second operand 21 states. [2018-11-07 18:00:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:00:13,405 INFO L93 Difference]: Finished difference Result 9484 states and 13110 transitions. [2018-11-07 18:00:13,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 18:00:13,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 360 [2018-11-07 18:00:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:00:13,423 INFO L225 Difference]: With dead ends: 9484 [2018-11-07 18:00:13,423 INFO L226 Difference]: Without dead ends: 4839 [2018-11-07 18:00:13,437 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 377 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-07 18:00:13,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2018-11-07 18:00:13,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 4834. [2018-11-07 18:00:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4834 states. [2018-11-07 18:00:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4834 states to 4834 states and 6587 transitions. [2018-11-07 18:00:13,553 INFO L78 Accepts]: Start accepts. Automaton has 4834 states and 6587 transitions. Word has length 360 [2018-11-07 18:00:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:00:13,554 INFO L480 AbstractCegarLoop]: Abstraction has 4834 states and 6587 transitions. [2018-11-07 18:00:13,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 18:00:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4834 states and 6587 transitions. [2018-11-07 18:00:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2018-11-07 18:00:13,575 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:00:13,575 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:00:13,576 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:00:13,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash -136240211, now seen corresponding path program 1 times [2018-11-07 18:00:13,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:00:13,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:13,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:00:13,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:13,578 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:00:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:00:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 189 proven. 166 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-11-07 18:00:14,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:00:14,221 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:00:14,221 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 446 with the following transitions: [2018-11-07 18:00:14,221 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:00:14,225 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:00:14,225 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:00:14,311 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:00:14,498 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:00:14,499 INFO L272 AbstractInterpreter]: Visited 123 different actions 367 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:00:14,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:14,507 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:00:15,046 INFO L227 lantSequenceWeakener]: Weakened 137 states. On average, predicates are now at 77.98% of their original sizes. [2018-11-07 18:00:15,046 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:00:15,489 INFO L415 sIntCurrentIteration]: We unified 444 AI predicates to 444 [2018-11-07 18:00:15,489 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:00:15,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:00:15,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-07 18:00:15,490 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:00:15,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 18:00:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 18:00:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-11-07 18:00:15,492 INFO L87 Difference]: Start difference. First operand 4834 states and 6587 transitions. Second operand 22 states. [2018-11-07 18:00:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:00:38,297 INFO L93 Difference]: Finished difference Result 10281 states and 13883 transitions. [2018-11-07 18:00:38,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 18:00:38,297 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 445 [2018-11-07 18:00:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:00:38,315 INFO L225 Difference]: With dead ends: 10281 [2018-11-07 18:00:38,315 INFO L226 Difference]: Without dead ends: 4837 [2018-11-07 18:00:38,327 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 465 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2018-11-07 18:00:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4837 states. [2018-11-07 18:00:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4837 to 4832. [2018-11-07 18:00:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4832 states. [2018-11-07 18:00:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 6564 transitions. [2018-11-07 18:00:38,440 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 6564 transitions. Word has length 445 [2018-11-07 18:00:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:00:38,441 INFO L480 AbstractCegarLoop]: Abstraction has 4832 states and 6564 transitions. [2018-11-07 18:00:38,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 18:00:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 6564 transitions. [2018-11-07 18:00:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-11-07 18:00:38,464 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:00:38,465 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:00:38,465 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:00:38,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:38,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2023204654, now seen corresponding path program 1 times [2018-11-07 18:00:38,466 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:00:38,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:38,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:00:38,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:38,467 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:00:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:00:39,211 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-07 18:00:39,412 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2018-11-07 18:00:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-07 18:00:40,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:00:40,087 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:00:40,087 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 471 with the following transitions: [2018-11-07 18:00:40,087 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:00:40,093 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:00:40,094 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:00:40,170 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:00:41,206 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:00:41,206 INFO L272 AbstractInterpreter]: Visited 123 different actions 366 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:00:41,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:41,245 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:00:41,718 INFO L227 lantSequenceWeakener]: Weakened 467 states. On average, predicates are now at 80.16% of their original sizes. [2018-11-07 18:00:41,718 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:00:41,814 INFO L415 sIntCurrentIteration]: We unified 469 AI predicates to 469 [2018-11-07 18:00:41,815 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:00:41,815 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:00:41,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2018-11-07 18:00:41,815 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:00:41,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:00:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:00:41,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:00:41,817 INFO L87 Difference]: Start difference. First operand 4832 states and 6564 transitions. Second operand 10 states. [2018-11-07 18:00:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:00:45,801 INFO L93 Difference]: Finished difference Result 9688 states and 13528 transitions. [2018-11-07 18:00:45,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:00:45,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 470 [2018-11-07 18:00:45,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:00:45,820 INFO L225 Difference]: With dead ends: 9688 [2018-11-07 18:00:45,820 INFO L226 Difference]: Without dead ends: 5417 [2018-11-07 18:00:45,833 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 477 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:00:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2018-11-07 18:00:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 5395. [2018-11-07 18:00:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5395 states. [2018-11-07 18:00:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5395 states to 5395 states and 7341 transitions. [2018-11-07 18:00:45,948 INFO L78 Accepts]: Start accepts. Automaton has 5395 states and 7341 transitions. Word has length 470 [2018-11-07 18:00:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:00:45,949 INFO L480 AbstractCegarLoop]: Abstraction has 5395 states and 7341 transitions. [2018-11-07 18:00:45,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:00:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5395 states and 7341 transitions. [2018-11-07 18:00:45,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2018-11-07 18:00:45,974 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:00:45,974 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-07 18:00:45,974 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:00:45,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:45,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1157088157, now seen corresponding path program 1 times [2018-11-07 18:00:45,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:00:45,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:45,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:00:45,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:00:45,976 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:00:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:00:46,731 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:00:47,454 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 18:00:47,677 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-11-07 18:00:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 330 proven. 309 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-11-07 18:00:48,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:00:48,869 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:00:48,869 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 538 with the following transitions: [2018-11-07 18:00:48,869 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:00:48,873 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:00:48,873 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:00:49,130 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:00:49,835 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:00:49,835 INFO L272 AbstractInterpreter]: Visited 191 different actions 953 times. Merged at 9 different actions 46 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:00:49,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:00:49,845 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:00:49,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:00:49,845 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 18:00:49,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:00:49,856 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:00:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:00:50,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:00:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 608 proven. 2 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-11-07 18:00:50,663 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:00:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 328 proven. 104 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-11-07 18:00:51,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:00:51,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-07 18:00:51,625 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:00:51,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:00:51,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:00:51,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:00:51,628 INFO L87 Difference]: Start difference. First operand 5395 states and 7341 transitions. Second operand 17 states. [2018-11-07 18:00:55,603 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-07 18:00:55,904 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-07 18:00:57,054 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2018-11-07 18:00:57,699 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-11-07 18:01:01,299 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2018-11-07 18:01:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:03,940 INFO L93 Difference]: Finished difference Result 13679 states and 20165 transitions. [2018-11-07 18:01:03,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-07 18:01:03,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 537 [2018-11-07 18:01:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:03,980 INFO L225 Difference]: With dead ends: 13679 [2018-11-07 18:01:03,980 INFO L226 Difference]: Without dead ends: 8845 [2018-11-07 18:01:04,020 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1172 GetRequests, 1107 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-07 18:01:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8845 states. [2018-11-07 18:01:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8845 to 8148. [2018-11-07 18:01:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8148 states. [2018-11-07 18:01:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8148 states to 8148 states and 10885 transitions. [2018-11-07 18:01:04,301 INFO L78 Accepts]: Start accepts. Automaton has 8148 states and 10885 transitions. Word has length 537 [2018-11-07 18:01:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:04,302 INFO L480 AbstractCegarLoop]: Abstraction has 8148 states and 10885 transitions. [2018-11-07 18:01:04,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:01:04,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8148 states and 10885 transitions. [2018-11-07 18:01:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-11-07 18:01:04,325 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:04,326 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:01:04,326 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:04,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:04,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1330600406, now seen corresponding path program 1 times [2018-11-07 18:01:04,327 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:04,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:04,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:04,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:04,328 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:05,760 WARN L179 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 18:01:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 439 proven. 445 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-11-07 18:01:06,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:06,918 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:06,919 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 544 with the following transitions: [2018-11-07 18:01:06,919 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:06,922 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:06,922 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:01:07,137 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:01:07,732 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:01:07,732 INFO L272 AbstractInterpreter]: Visited 125 different actions 622 times. Merged at 10 different actions 44 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:01:07,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:07,772 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:01:07,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:07,772 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 18:01:07,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:07,785 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:07,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 781 proven. 2 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-11-07 18:01:08,491 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 433 proven. 104 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2018-11-07 18:01:09,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:09,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-07 18:01:09,187 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:09,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:01:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:01:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:01:09,189 INFO L87 Difference]: Start difference. First operand 8148 states and 10885 transitions. Second operand 17 states. [2018-11-07 18:01:14,737 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-11-07 18:01:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:15,634 INFO L93 Difference]: Finished difference Result 15903 states and 22816 transitions. [2018-11-07 18:01:15,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 18:01:15,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 543 [2018-11-07 18:01:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:15,667 INFO L225 Difference]: With dead ends: 15903 [2018-11-07 18:01:15,667 INFO L226 Difference]: Without dead ends: 7111 [2018-11-07 18:01:15,696 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 1096 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2018-11-07 18:01:15,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2018-11-07 18:01:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 6712. [2018-11-07 18:01:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6712 states. [2018-11-07 18:01:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 7982 transitions. [2018-11-07 18:01:15,873 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 7982 transitions. Word has length 543 [2018-11-07 18:01:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:15,874 INFO L480 AbstractCegarLoop]: Abstraction has 6712 states and 7982 transitions. [2018-11-07 18:01:15,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:01:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 7982 transitions. [2018-11-07 18:01:15,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2018-11-07 18:01:15,885 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:15,886 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 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] [2018-11-07 18:01:15,886 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:15,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:15,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1779031265, now seen corresponding path program 2 times [2018-11-07 18:01:15,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:15,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:15,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:15,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:15,888 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 471 proven. 104 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-11-07 18:01:16,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:16,925 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:16,925 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 18:01:16,925 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 18:01:16,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:16,925 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 18:01:16,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 18:01:16,943 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 18:01:17,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-07 18:01:17,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 18:01:17,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 729 proven. 46 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2018-11-07 18:01:17,850 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 769 proven. 104 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-11-07 18:01:18,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:18,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 14 [2018-11-07 18:01:18,441 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:18,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:01:18,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:01:18,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:01:18,443 INFO L87 Difference]: Start difference. First operand 6712 states and 7982 transitions. Second operand 9 states. [2018-11-07 18:01:21,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:21,496 INFO L93 Difference]: Finished difference Result 20451 states and 31094 transitions. [2018-11-07 18:01:21,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 18:01:21,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 648 [2018-11-07 18:01:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:21,631 INFO L225 Difference]: With dead ends: 20451 [2018-11-07 18:01:21,632 INFO L226 Difference]: Without dead ends: 14300 [2018-11-07 18:01:21,725 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1293 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:01:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14300 states. [2018-11-07 18:01:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14300 to 13826. [2018-11-07 18:01:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13826 states. [2018-11-07 18:01:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13826 states to 13826 states and 16788 transitions. [2018-11-07 18:01:22,213 INFO L78 Accepts]: Start accepts. Automaton has 13826 states and 16788 transitions. Word has length 648 [2018-11-07 18:01:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:22,214 INFO L480 AbstractCegarLoop]: Abstraction has 13826 states and 16788 transitions. [2018-11-07 18:01:22,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:01:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 13826 states and 16788 transitions. [2018-11-07 18:01:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2018-11-07 18:01:22,230 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:22,230 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:01:22,230 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:22,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:22,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1759764776, now seen corresponding path program 1 times [2018-11-07 18:01:22,231 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:22,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:22,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 18:01:22,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:22,232 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 478 proven. 104 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-11-07 18:01:22,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:22,911 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:22,911 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 656 with the following transitions: [2018-11-07 18:01:22,911 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:22,914 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:22,914 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:01:23,106 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:01:23,999 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:01:23,999 INFO L272 AbstractInterpreter]: Visited 192 different actions 965 times. Merged at 10 different actions 53 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:01:24,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:24,005 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:01:24,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:24,005 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:24,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:24,015 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:24,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 858 proven. 2 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-11-07 18:01:24,638 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 478 proven. 104 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-11-07 18:01:25,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:25,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:01:25,344 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:25,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:01:25,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:01:25,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:01:25,345 INFO L87 Difference]: Start difference. First operand 13826 states and 16788 transitions. Second operand 7 states. [2018-11-07 18:01:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:27,799 INFO L93 Difference]: Finished difference Result 32981 states and 49223 transitions. [2018-11-07 18:01:27,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:01:27,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 655 [2018-11-07 18:01:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:27,967 INFO L225 Difference]: With dead ends: 32981 [2018-11-07 18:01:27,968 INFO L226 Difference]: Without dead ends: 19716 [2018-11-07 18:01:28,287 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1325 GetRequests, 1312 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:01:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19716 states. [2018-11-07 18:01:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19716 to 19232. [2018-11-07 18:01:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19232 states. [2018-11-07 18:01:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19232 states to 19232 states and 24148 transitions. [2018-11-07 18:01:28,883 INFO L78 Accepts]: Start accepts. Automaton has 19232 states and 24148 transitions. Word has length 655 [2018-11-07 18:01:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:28,884 INFO L480 AbstractCegarLoop]: Abstraction has 19232 states and 24148 transitions. [2018-11-07 18:01:28,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:01:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 19232 states and 24148 transitions. [2018-11-07 18:01:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2018-11-07 18:01:28,898 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:28,899 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 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 18:01:28,899 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:28,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1719192567, now seen corresponding path program 1 times [2018-11-07 18:01:28,900 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:28,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:28,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:28,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:28,901 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1255 backedges. 477 proven. 567 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-11-07 18:01:30,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:30,794 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:30,794 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 701 with the following transitions: [2018-11-07 18:01:30,795 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:30,798 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:30,798 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:01:30,960 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:01:31,897 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:01:31,898 INFO L272 AbstractInterpreter]: Visited 192 different actions 960 times. Merged at 10 different actions 48 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:01:31,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:31,906 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:01:31,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:31,906 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:31,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:31,917 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:32,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1255 backedges. 903 proven. 2 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-11-07 18:01:32,802 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:33,079 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2018-11-07 18:01:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1255 backedges. 523 proven. 104 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-11-07 18:01:33,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:33,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-07 18:01:33,661 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:33,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:01:33,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:01:33,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:01:33,663 INFO L87 Difference]: Start difference. First operand 19232 states and 24148 transitions. Second operand 17 states. [2018-11-07 18:01:37,221 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-07 18:01:37,766 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2018-11-07 18:01:37,976 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2018-11-07 18:01:38,492 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-07 18:01:39,468 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-11-07 18:01:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:40,974 INFO L93 Difference]: Finished difference Result 38657 states and 49339 transitions. [2018-11-07 18:01:40,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-07 18:01:40,975 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 700 [2018-11-07 18:01:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:41,058 INFO L225 Difference]: With dead ends: 38657 [2018-11-07 18:01:41,058 INFO L226 Difference]: Without dead ends: 19618 [2018-11-07 18:01:41,169 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1472 GetRequests, 1422 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-07 18:01:41,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19618 states. [2018-11-07 18:01:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19618 to 19367. [2018-11-07 18:01:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19367 states. [2018-11-07 18:01:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19367 states to 19367 states and 23770 transitions. [2018-11-07 18:01:41,672 INFO L78 Accepts]: Start accepts. Automaton has 19367 states and 23770 transitions. Word has length 700 [2018-11-07 18:01:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:41,673 INFO L480 AbstractCegarLoop]: Abstraction has 19367 states and 23770 transitions. [2018-11-07 18:01:41,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:01:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19367 states and 23770 transitions. [2018-11-07 18:01:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2018-11-07 18:01:41,692 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:41,692 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 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] [2018-11-07 18:01:41,693 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:41,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:41,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1415427705, now seen corresponding path program 1 times [2018-11-07 18:01:41,694 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:41,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:41,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:41,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:41,695 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1838 backedges. 670 proven. 104 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2018-11-07 18:01:42,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:42,800 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:42,800 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 816 with the following transitions: [2018-11-07 18:01:42,800 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:42,803 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:42,803 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:01:43,147 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:01:44,054 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:01:44,054 INFO L272 AbstractInterpreter]: Visited 193 different actions 1170 times. Merged at 11 different actions 72 times. Widened at 1 different actions 2 times. Found 20 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:01:44,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:44,081 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:01:44,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:44,081 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:44,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:44,095 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:44,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1838 backedges. 1150 proven. 2 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2018-11-07 18:01:44,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1838 backedges. 670 proven. 104 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2018-11-07 18:01:45,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:45,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:01:45,354 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:45,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:01:45,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:01:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:01:45,355 INFO L87 Difference]: Start difference. First operand 19367 states and 23770 transitions. Second operand 7 states. [2018-11-07 18:01:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:01:47,360 INFO L93 Difference]: Finished difference Result 36608 states and 45055 transitions. [2018-11-07 18:01:47,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:01:47,360 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 815 [2018-11-07 18:01:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:01:47,427 INFO L225 Difference]: With dead ends: 36608 [2018-11-07 18:01:47,427 INFO L226 Difference]: Without dead ends: 17615 [2018-11-07 18:01:47,509 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1646 GetRequests, 1633 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:01:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17615 states. [2018-11-07 18:01:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17615 to 16942. [2018-11-07 18:01:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16942 states. [2018-11-07 18:01:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16942 states to 16942 states and 19679 transitions. [2018-11-07 18:01:47,908 INFO L78 Accepts]: Start accepts. Automaton has 16942 states and 19679 transitions. Word has length 815 [2018-11-07 18:01:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:01:47,909 INFO L480 AbstractCegarLoop]: Abstraction has 16942 states and 19679 transitions. [2018-11-07 18:01:47,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:01:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 16942 states and 19679 transitions. [2018-11-07 18:01:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2018-11-07 18:01:47,929 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:01:47,929 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:01:47,930 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:01:47,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:47,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1190468721, now seen corresponding path program 1 times [2018-11-07 18:01:47,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:01:47,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:47,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:47,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:01:47,931 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:01:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2342 backedges. 555 proven. 1133 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2018-11-07 18:01:50,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:50,580 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:01:50,581 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 911 with the following transitions: [2018-11-07 18:01:50,581 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:01:50,583 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:01:50,584 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:01:50,732 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:01:51,458 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:01:51,458 INFO L272 AbstractInterpreter]: Visited 194 different actions 984 times. Merged at 11 different actions 62 times. Widened at 1 different actions 1 times. Found 19 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:01:51,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:01:51,465 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:01:51,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:01:51,465 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:01:51,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:01:51,476 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:01:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:01:51,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:01:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2342 backedges. 1681 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2018-11-07 18:01:52,231 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:01:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2342 backedges. 556 proven. 353 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2018-11-07 18:01:53,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:01:53,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-07 18:01:53,179 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:01:53,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:01:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:01:53,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:01:53,181 INFO L87 Difference]: Start difference. First operand 16942 states and 19679 transitions. Second operand 18 states. [2018-11-07 18:01:55,312 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2018-11-07 18:02:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:03,886 INFO L93 Difference]: Finished difference Result 33594 states and 39140 transitions. [2018-11-07 18:02:03,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-07 18:02:03,886 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 910 [2018-11-07 18:02:03,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:03,922 INFO L225 Difference]: With dead ends: 33594 [2018-11-07 18:02:03,923 INFO L226 Difference]: Without dead ends: 17026 [2018-11-07 18:02:03,960 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1910 GetRequests, 1847 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=850, Invalid=3310, Unknown=0, NotChecked=0, Total=4160 [2018-11-07 18:02:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17026 states. [2018-11-07 18:02:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17026 to 16919. [2018-11-07 18:02:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16919 states. [2018-11-07 18:02:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16919 states to 16919 states and 19018 transitions. [2018-11-07 18:02:04,235 INFO L78 Accepts]: Start accepts. Automaton has 16919 states and 19018 transitions. Word has length 910 [2018-11-07 18:02:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:04,236 INFO L480 AbstractCegarLoop]: Abstraction has 16919 states and 19018 transitions. [2018-11-07 18:02:04,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:02:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 16919 states and 19018 transitions. [2018-11-07 18:02:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2018-11-07 18:02:04,246 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:04,246 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 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] [2018-11-07 18:02:04,247 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:04,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:04,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1957952450, now seen corresponding path program 1 times [2018-11-07 18:02:04,247 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:04,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:04,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:04,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:04,248 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 1317 proven. 100 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2018-11-07 18:02:05,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:05,258 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:02:05,258 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 956 with the following transitions: [2018-11-07 18:02:05,258 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:02:05,261 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:02:05,261 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:02:05,476 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:02:06,598 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:02:06,601 INFO L272 AbstractInterpreter]: Visited 194 different actions 1179 times. Merged at 12 different actions 75 times. Widened at 1 different actions 2 times. Found 25 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:02:06,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:06,634 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:02:06,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:06,634 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:02:06,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:06,645 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:02:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:06,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:02:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 1317 proven. 6 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2018-11-07 18:02:07,798 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:02:07,981 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2018-11-07 18:02:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 1317 proven. 104 refuted. 0 times theorem prover too weak. 1011 trivial. 0 not checked. [2018-11-07 18:02:08,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:02:08,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2018-11-07 18:02:08,785 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:02:08,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:02:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:02:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:02:08,787 INFO L87 Difference]: Start difference. First operand 16919 states and 19018 transitions. Second operand 10 states. [2018-11-07 18:02:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:13,033 INFO L93 Difference]: Finished difference Result 38785 states and 44017 transitions. [2018-11-07 18:02:13,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 18:02:13,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 955 [2018-11-07 18:02:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:13,094 INFO L225 Difference]: With dead ends: 38785 [2018-11-07 18:02:13,094 INFO L226 Difference]: Without dead ends: 22240 [2018-11-07 18:02:13,123 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1934 GetRequests, 1911 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2018-11-07 18:02:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22240 states. [2018-11-07 18:02:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22240 to 21022. [2018-11-07 18:02:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21022 states. [2018-11-07 18:02:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21022 states to 21022 states and 23645 transitions. [2018-11-07 18:02:13,467 INFO L78 Accepts]: Start accepts. Automaton has 21022 states and 23645 transitions. Word has length 955 [2018-11-07 18:02:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:13,468 INFO L480 AbstractCegarLoop]: Abstraction has 21022 states and 23645 transitions. [2018-11-07 18:02:13,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:02:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 21022 states and 23645 transitions. [2018-11-07 18:02:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1087 [2018-11-07 18:02:13,489 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:13,489 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 18:02:13,489 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:13,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:13,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1401521414, now seen corresponding path program 1 times [2018-11-07 18:02:13,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:13,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:13,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:13,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:13,491 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:15,300 WARN L179 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-07 18:02:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3252 backedges. 875 proven. 1666 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2018-11-07 18:02:17,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:17,913 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:02:17,913 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1087 with the following transitions: [2018-11-07 18:02:17,913 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [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], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [738], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:02:17,916 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:02:17,917 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:02:18,126 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:02:18,956 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:02:18,956 INFO L272 AbstractInterpreter]: Visited 195 different actions 1185 times. Merged at 12 different actions 75 times. Widened at 1 different actions 2 times. Found 28 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:02:18,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:18,967 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:02:18,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:18,967 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:02:18,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:18,976 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:02:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:19,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:02:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3252 backedges. 1578 proven. 2 refuted. 0 times theorem prover too weak. 1672 trivial. 0 not checked. [2018-11-07 18:02:20,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:02:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3252 backedges. 926 proven. 104 refuted. 0 times theorem prover too weak. 2222 trivial. 0 not checked. [2018-11-07 18:02:21,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:02:21,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 19 [2018-11-07 18:02:21,093 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:02:21,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:02:21,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:02:21,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:02:21,095 INFO L87 Difference]: Start difference. First operand 21022 states and 23645 transitions. Second operand 18 states. Received shutdown request... [2018-11-07 18:02:24,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-07 18:02:24,263 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:02:24,267 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:02:24,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:02:24 BoogieIcfgContainer [2018-11-07 18:02:24,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:02:24,268 INFO L168 Benchmark]: Toolchain (without parser) took 210503.97 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -505.3 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-07 18:02:24,268 INFO L168 Benchmark]: CDTParser took 0.23 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 18:02:24,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 818.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:02:24,269 INFO L168 Benchmark]: Boogie Procedure Inliner took 143.84 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -829.5 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2018-11-07 18:02:24,271 INFO L168 Benchmark]: Boogie Preprocessor took 108.52 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:02:24,271 INFO L168 Benchmark]: RCFGBuilder took 3538.26 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 118.1 MB). Peak memory consumption was 118.1 MB. Max. memory is 7.1 GB. [2018-11-07 18:02:24,272 INFO L168 Benchmark]: TraceAbstraction took 205889.24 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 153.3 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-07 18:02:24,283 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 818.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 143.84 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 730.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -829.5 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.52 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3538.26 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 118.1 MB). Peak memory consumption was 118.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 205889.24 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 153.3 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 76). Cancelled while BasicCegarLoop was constructing difference of abstraction (21022states) and FLOYD_HOARE automaton (currently 25 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 205.8s OverallTime, 19 OverallIterations, 9 TraceHistogramMax, 142.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2466 SDtfs, 39047 SDslu, 4442 SDs, 0 SdLazy, 47972 SolverSat, 6770 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.7s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 16099 GetRequests, 15598 SyntacticMatches, 14 SemanticMatches, 486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5236 ImplicationChecksByTransitivity, 26.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21022occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 11.1s AbstIntTime, 13 AbstIntIterations, 5 AbstIntStrong, 0.9971922002254422 AbsIntWeakeningRatio, 0.08958445763626552 AbsIntAvgWeakeningVarsNumRemoved, 18.129519697787373 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.0s AutomataMinimizationTime, 18 MinimizatonAttempts, 4486 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 28.8s InterpolantComputationTime, 15999 NumberOfCodeBlocks, 15778 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 22811 ConstructedInterpolants, 0 QuantifiedInterpolants, 74415845 SizeOfPredicates, 31 NumberOfNonLiveVariables, 9498 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 37 InterpolantComputations, 5 PerfectInterpolantSequences, 41961/48399 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown