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/Problem10_label12_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 17:41:15,958 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 17:41:15,960 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 17:41:15,972 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 17:41:15,972 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 17:41:15,973 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 17:41:15,974 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 17:41:15,976 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 17:41:15,978 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 17:41:15,978 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 17:41:15,979 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 17:41:15,980 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 17:41:15,981 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 17:41:15,981 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 17:41:15,983 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 17:41:15,983 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 17:41:15,984 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 17:41:15,986 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 17:41:15,988 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 17:41:15,989 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 17:41:15,990 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 17:41:15,991 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 17:41:15,994 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 17:41:15,994 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 17:41:15,994 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 17:41:15,995 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 17:41:15,996 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 17:41:15,997 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 17:41:15,998 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 17:41:16,001 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 17:41:16,001 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 17:41:16,002 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 17:41:16,002 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 17:41:16,002 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 17:41:16,003 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 17:41:16,004 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 17:41:16,004 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 17:41:16,026 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 17:41:16,026 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 17:41:16,027 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 17:41:16,027 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 17:41:16,027 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 17:41:16,028 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 17:41:16,028 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 17:41:16,028 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 17:41:16,028 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 17:41:16,028 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 17:41:16,029 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 17:41:16,029 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 17:41:16,029 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 17:41:16,030 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 17:41:16,030 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 17:41:16,030 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 17:41:16,030 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 17:41:16,030 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 17:41:16,030 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 17:41:16,031 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 17:41:16,031 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 17:41:16,031 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 17:41:16,031 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 17:41:16,031 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 17:41:16,032 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 17:41:16,032 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 17:41:16,032 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 17:41:16,032 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 17:41:16,032 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 17:41:16,033 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 17:41:16,033 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 17:41:16,033 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 17:41:16,033 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 17:41:16,033 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 17:41:16,033 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 17:41:16,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 17:41:16,093 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 17:41:16,098 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 17:41:16,100 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 17:41:16,100 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 17:41:16,101 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label12_false-unreach-call.c [2018-11-07 17:41:16,168 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d452665/90b1fdf06ed040a596350c103c60d9cf/FLAG6b509c8d2 [2018-11-07 17:41:16,714 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 17:41:16,714 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label12_false-unreach-call.c [2018-11-07 17:41:16,733 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d452665/90b1fdf06ed040a596350c103c60d9cf/FLAG6b509c8d2 [2018-11-07 17:41:16,754 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d452665/90b1fdf06ed040a596350c103c60d9cf [2018-11-07 17:41:16,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 17:41:16,769 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 17:41:16,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 17:41:16,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 17:41:16,777 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 17:41:16,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:41:16" (1/1) ... [2018-11-07 17:41:16,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a715eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:16, skipping insertion in model container [2018-11-07 17:41:16,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:41:16" (1/1) ... [2018-11-07 17:41:16,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 17:41:16,860 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 17:41:17,317 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 17:41:17,322 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 17:41:17,450 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 17:41:17,468 INFO L193 MainTranslator]: Completed translation [2018-11-07 17:41:17,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17 WrapperNode [2018-11-07 17:41:17,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 17:41:17,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 17:41:17,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 17:41:17,470 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 17:41:17,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (1/1) ... [2018-11-07 17:41:17,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (1/1) ... [2018-11-07 17:41:17,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 17:41:17,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 17:41:17,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 17:41:17,608 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 17:41:17,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (1/1) ... [2018-11-07 17:41:17,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (1/1) ... [2018-11-07 17:41:17,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (1/1) ... [2018-11-07 17:41:17,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (1/1) ... [2018-11-07 17:41:17,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (1/1) ... [2018-11-07 17:41:17,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (1/1) ... [2018-11-07 17:41:17,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (1/1) ... [2018-11-07 17:41:17,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 17:41:17,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 17:41:17,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 17:41:17,703 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 17:41:17,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (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 17:41:17,780 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 17:41:17,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 17:41:17,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 17:41:17,781 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 17:41:17,781 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 17:41:17,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 17:41:17,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 17:41:17,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 17:41:17,782 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 17:41:20,916 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 17:41:20,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:41:20 BoogieIcfgContainer [2018-11-07 17:41:20,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 17:41:20,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 17:41:20,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 17:41:20,922 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 17:41:20,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:41:16" (1/3) ... [2018-11-07 17:41:20,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd26b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:41:20, skipping insertion in model container [2018-11-07 17:41:20,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:41:17" (2/3) ... [2018-11-07 17:41:20,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd26b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:41:20, skipping insertion in model container [2018-11-07 17:41:20,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:41:20" (3/3) ... [2018-11-07 17:41:20,926 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label12_false-unreach-call.c [2018-11-07 17:41:20,937 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 17:41:20,947 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 17:41:20,961 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 17:41:21,001 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 17:41:21,001 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 17:41:21,001 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 17:41:21,002 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 17:41:21,002 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 17:41:21,002 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 17:41:21,002 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 17:41:21,003 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 17:41:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-11-07 17:41:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-07 17:41:21,039 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:41:21,042 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:41:21,045 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:41:21,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:41:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1125399135, now seen corresponding path program 1 times [2018-11-07 17:41:21,057 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:41:21,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:41:21,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:41:21,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:41:21,110 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:41:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:41:21,494 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 17:41:21,585 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 17:41:21,588 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:41:21,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 17:41:21,589 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:41:21,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 17:41:21,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 17:41:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 17:41:21,609 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2018-11-07 17:41:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:41:23,168 INFO L93 Difference]: Finished difference Result 574 states and 992 transitions. [2018-11-07 17:41:23,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 17:41:23,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-11-07 17:41:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:41:23,190 INFO L225 Difference]: With dead ends: 574 [2018-11-07 17:41:23,190 INFO L226 Difference]: Without dead ends: 356 [2018-11-07 17:41:23,200 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 17:41:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-11-07 17:41:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-11-07 17:41:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-11-07 17:41:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 612 transitions. [2018-11-07 17:41:23,273 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 612 transitions. Word has length 19 [2018-11-07 17:41:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:41:23,274 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 612 transitions. [2018-11-07 17:41:23,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 17:41:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 612 transitions. [2018-11-07 17:41:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-07 17:41:23,281 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:41:23,281 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:41:23,282 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:41:23,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:41:23,282 INFO L82 PathProgramCache]: Analyzing trace with hash 407451016, now seen corresponding path program 1 times [2018-11-07 17:41:23,282 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:41:23,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:41:23,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:41:23,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:41:23,284 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:41:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:41:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 17:41:23,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:41:23,629 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:41:23,630 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 98 with the following transitions: [2018-11-07 17:41:23,632 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [526], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 17:41:23,679 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:41:23,680 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:41:24,205 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:41:24,213 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:41:24,216 INFO L272 AbstractInterpreter]: Visited 82 different actions 82 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 17:41:24,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:41:24,267 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:41:24,744 INFO L227 lantSequenceWeakener]: Weakened 91 states. On average, predicates are now at 72.48% of their original sizes. [2018-11-07 17:41:24,744 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:41:25,094 INFO L415 sIntCurrentIteration]: We unified 96 AI predicates to 96 [2018-11-07 17:41:25,094 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:41:25,095 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:41:25,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2018-11-07 17:41:25,096 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:41:25,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 17:41:25,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 17:41:25,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 17:41:25,099 INFO L87 Difference]: Start difference. First operand 356 states and 612 transitions. Second operand 7 states. [2018-11-07 17:41:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:41:38,527 INFO L93 Difference]: Finished difference Result 852 states and 1486 transitions. [2018-11-07 17:41:38,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 17:41:38,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2018-11-07 17:41:38,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:41:38,532 INFO L225 Difference]: With dead ends: 852 [2018-11-07 17:41:38,532 INFO L226 Difference]: Without dead ends: 502 [2018-11-07 17:41:38,534 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 97 GetRequests, 91 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 17:41:38,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2018-11-07 17:41:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 500. [2018-11-07 17:41:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2018-11-07 17:41:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 762 transitions. [2018-11-07 17:41:38,568 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 762 transitions. Word has length 97 [2018-11-07 17:41:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:41:38,569 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 762 transitions. [2018-11-07 17:41:38,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 17:41:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 762 transitions. [2018-11-07 17:41:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-11-07 17:41:38,575 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:41:38,576 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:41:38,576 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:41:38,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:41:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash 922326170, now seen corresponding path program 1 times [2018-11-07 17:41:38,577 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:41:38,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:41:38,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:41:38,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:41:38,578 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:41:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:41:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-07 17:41:38,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:41:38,971 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:41:38,971 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 169 with the following transitions: [2018-11-07 17:41:38,971 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [526], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 17:41:38,979 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:41:38,979 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:41:39,076 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:41:39,507 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:41:39,508 INFO L272 AbstractInterpreter]: Visited 86 different actions 406 times. Merged at 5 different actions 20 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 17:41:39,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:41:39,534 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:41:39,858 INFO L227 lantSequenceWeakener]: Weakened 17 states. On average, predicates are now at 75.14% of their original sizes. [2018-11-07 17:41:39,858 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:41:40,469 INFO L415 sIntCurrentIteration]: We unified 167 AI predicates to 167 [2018-11-07 17:41:40,469 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:41:40,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:41:40,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [4] total 22 [2018-11-07 17:41:40,470 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:41:40,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 17:41:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 17:41:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2018-11-07 17:41:40,472 INFO L87 Difference]: Start difference. First operand 500 states and 762 transitions. Second operand 20 states. [2018-11-07 17:41:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:41:53,654 INFO L93 Difference]: Finished difference Result 1236 states and 2074 transitions. [2018-11-07 17:41:53,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 17:41:53,654 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 168 [2018-11-07 17:41:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:41:53,660 INFO L225 Difference]: With dead ends: 1236 [2018-11-07 17:41:53,660 INFO L226 Difference]: Without dead ends: 886 [2018-11-07 17:41:53,663 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 177 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-11-07 17:41:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2018-11-07 17:41:53,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 798. [2018-11-07 17:41:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 798 states. [2018-11-07 17:41:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1089 transitions. [2018-11-07 17:41:53,706 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1089 transitions. Word has length 168 [2018-11-07 17:41:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:41:53,707 INFO L480 AbstractCegarLoop]: Abstraction has 798 states and 1089 transitions. [2018-11-07 17:41:53,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 17:41:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1089 transitions. [2018-11-07 17:41:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-07 17:41:53,713 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:41:53,713 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:41:53,713 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:41:53,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:41:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1586204051, now seen corresponding path program 1 times [2018-11-07 17:41:53,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:41:53,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:41:53,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:41:53,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:41:53,715 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:41:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:41:54,024 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 17:41:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 17:41:54,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:41:54,945 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:41:54,945 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 178 with the following transitions: [2018-11-07 17:41:54,946 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [526], [527], [531], [534], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 17:41:54,949 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:41:54,950 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:41:55,023 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:41:55,156 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:41:55,156 INFO L272 AbstractInterpreter]: Visited 88 different actions 261 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 17:41:55,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:41:55,158 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:41:55,758 INFO L227 lantSequenceWeakener]: Weakened 174 states. On average, predicates are now at 75.01% of their original sizes. [2018-11-07 17:41:55,758 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:41:56,551 INFO L415 sIntCurrentIteration]: We unified 176 AI predicates to 176 [2018-11-07 17:41:56,551 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:41:56,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:41:56,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2018-11-07 17:41:56,552 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:41:56,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 17:41:56,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 17:41:56,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 17:41:56,553 INFO L87 Difference]: Start difference. First operand 798 states and 1089 transitions. Second operand 10 states. [2018-11-07 17:42:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:42:08,056 INFO L93 Difference]: Finished difference Result 1865 states and 2927 transitions. [2018-11-07 17:42:08,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 17:42:08,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 177 [2018-11-07 17:42:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:42:08,065 INFO L225 Difference]: With dead ends: 1865 [2018-11-07 17:42:08,065 INFO L226 Difference]: Without dead ends: 1368 [2018-11-07 17:42:08,068 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 184 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 17:42:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2018-11-07 17:42:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1345. [2018-11-07 17:42:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2018-11-07 17:42:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1843 transitions. [2018-11-07 17:42:08,139 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1843 transitions. Word has length 177 [2018-11-07 17:42:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:42:08,140 INFO L480 AbstractCegarLoop]: Abstraction has 1345 states and 1843 transitions. [2018-11-07 17:42:08,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 17:42:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1843 transitions. [2018-11-07 17:42:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-11-07 17:42:08,151 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:42:08,152 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:42:08,153 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:42:08,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:42:08,153 INFO L82 PathProgramCache]: Analyzing trace with hash -595029241, now seen corresponding path program 1 times [2018-11-07 17:42:08,154 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:42:08,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:42:08,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:42:08,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:42:08,156 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:42:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:42:08,508 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 17:42:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 17:42:09,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:42:09,444 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:42:09,445 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2018-11-07 17:42:09,445 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [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], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 17:42:09,453 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:42:09,460 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:42:09,537 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:42:10,057 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:42:10,057 INFO L272 AbstractInterpreter]: Visited 128 different actions 738 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 17:42:10,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:42:10,066 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:42:10,277 INFO L227 lantSequenceWeakener]: Weakened 216 states. On average, predicates are now at 72.68% of their original sizes. [2018-11-07 17:42:10,277 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:42:10,375 INFO L415 sIntCurrentIteration]: We unified 218 AI predicates to 218 [2018-11-07 17:42:10,375 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:42:10,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:42:10,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2018-11-07 17:42:10,376 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:42:10,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 17:42:10,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 17:42:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 17:42:10,377 INFO L87 Difference]: Start difference. First operand 1345 states and 1843 transitions. Second operand 10 states. [2018-11-07 17:42:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:42:17,055 INFO L93 Difference]: Finished difference Result 3250 states and 4689 transitions. [2018-11-07 17:42:17,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 17:42:17,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 219 [2018-11-07 17:42:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:42:17,068 INFO L225 Difference]: With dead ends: 3250 [2018-11-07 17:42:17,068 INFO L226 Difference]: Without dead ends: 2206 [2018-11-07 17:42:17,074 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 226 GetRequests, 210 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 17:42:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2018-11-07 17:42:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 2188. [2018-11-07 17:42:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2018-11-07 17:42:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2943 transitions. [2018-11-07 17:42:17,136 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2943 transitions. Word has length 219 [2018-11-07 17:42:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:42:17,137 INFO L480 AbstractCegarLoop]: Abstraction has 2188 states and 2943 transitions. [2018-11-07 17:42:17,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 17:42:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2943 transitions. [2018-11-07 17:42:17,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-11-07 17:42:17,143 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:42:17,144 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 17:42:17,144 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:42:17,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:42:17,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2124363791, now seen corresponding path program 1 times [2018-11-07 17:42:17,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:42:17,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:42:17,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:42:17,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:42:17,146 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:42:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:42:17,604 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-07 17:42:17,790 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 17:42:18,007 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-11-07 17:42:18,245 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-11-07 17:42:18,722 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2018-11-07 17:42:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:42:18,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:42:18,974 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:42:18,974 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 256 with the following transitions: [2018-11-07 17:42:18,975 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [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], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [679], [683], [687], [691], [694], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 17:42:18,978 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:42:18,978 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:42:19,103 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:42:19,262 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:42:19,263 INFO L272 AbstractInterpreter]: Visited 128 different actions 252 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 17:42:19,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:42:19,300 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:42:19,717 INFO L227 lantSequenceWeakener]: Weakened 67 states. On average, predicates are now at 74.88% of their original sizes. [2018-11-07 17:42:19,717 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:42:20,425 INFO L415 sIntCurrentIteration]: We unified 254 AI predicates to 254 [2018-11-07 17:42:20,426 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:42:20,426 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:42:20,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [15] total 36 [2018-11-07 17:42:20,427 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:42:20,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-07 17:42:20,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-07 17:42:20,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2018-11-07 17:42:20,429 INFO L87 Difference]: Start difference. First operand 2188 states and 2943 transitions. Second operand 23 states. [2018-11-07 17:42:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:42:38,653 INFO L93 Difference]: Finished difference Result 5644 states and 7677 transitions. [2018-11-07 17:42:38,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-07 17:42:38,653 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 255 [2018-11-07 17:42:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:42:38,672 INFO L225 Difference]: With dead ends: 5644 [2018-11-07 17:42:38,673 INFO L226 Difference]: Without dead ends: 3755 [2018-11-07 17:42:38,682 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 279 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=417, Invalid=1839, Unknown=0, NotChecked=0, Total=2256 [2018-11-07 17:42:38,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2018-11-07 17:42:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3402. [2018-11-07 17:42:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3402 states. [2018-11-07 17:42:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4367 transitions. [2018-11-07 17:42:38,786 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4367 transitions. Word has length 255 [2018-11-07 17:42:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:42:38,787 INFO L480 AbstractCegarLoop]: Abstraction has 3402 states and 4367 transitions. [2018-11-07 17:42:38,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-07 17:42:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4367 transitions. [2018-11-07 17:42:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-11-07 17:42:38,798 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:42:38,799 INFO L375 BasicCegarLoop]: trace histogram [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, 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 17:42:38,799 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:42:38,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:42:38,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1611747793, now seen corresponding path program 1 times [2018-11-07 17:42:38,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:42:38,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:42:38,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:42:38,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:42:38,801 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:42:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:42:39,223 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 17:42:39,426 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 17:42:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 174 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-07 17:42:40,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:42:40,008 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:42:40,008 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 287 with the following transitions: [2018-11-07 17:42:40,008 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [518], [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], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 17:42:40,012 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:42:40,012 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:42:40,066 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:42:40,446 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:42:40,447 INFO L272 AbstractInterpreter]: Visited 129 different actions 503 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 17:42:40,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:42:40,453 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:42:40,756 INFO L227 lantSequenceWeakener]: Weakened 42 states. On average, predicates are now at 73.76% of their original sizes. [2018-11-07 17:42:40,756 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:42:41,279 INFO L415 sIntCurrentIteration]: We unified 285 AI predicates to 285 [2018-11-07 17:42:41,279 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:42:41,280 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:42:41,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [13] total 33 [2018-11-07 17:42:41,280 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:42:41,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 17:42:41,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 17:42:41,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-11-07 17:42:41,281 INFO L87 Difference]: Start difference. First operand 3402 states and 4367 transitions. Second operand 22 states. [2018-11-07 17:42:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:42:58,254 INFO L93 Difference]: Finished difference Result 7444 states and 9572 transitions. [2018-11-07 17:42:58,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-07 17:42:58,255 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 286 [2018-11-07 17:42:58,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:42:58,276 INFO L225 Difference]: With dead ends: 7444 [2018-11-07 17:42:58,277 INFO L226 Difference]: Without dead ends: 4719 [2018-11-07 17:42:58,287 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=407, Invalid=1849, Unknown=0, NotChecked=0, Total=2256 [2018-11-07 17:42:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4719 states. [2018-11-07 17:42:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4719 to 3862. [2018-11-07 17:42:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3862 states. [2018-11-07 17:42:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3862 states to 3862 states and 4870 transitions. [2018-11-07 17:42:59,081 INFO L78 Accepts]: Start accepts. Automaton has 3862 states and 4870 transitions. Word has length 286 [2018-11-07 17:42:59,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:42:59,082 INFO L480 AbstractCegarLoop]: Abstraction has 3862 states and 4870 transitions. [2018-11-07 17:42:59,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 17:42:59,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3862 states and 4870 transitions. [2018-11-07 17:42:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-11-07 17:42:59,097 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:42:59,097 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:42:59,097 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:42:59,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:42:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1156184953, now seen corresponding path program 1 times [2018-11-07 17:42:59,100 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:42:59,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:42:59,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:42:59,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:42:59,102 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:42:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:42:59,472 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 17:42:59,669 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 17:43:00,126 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-07 17:43:00,531 WARN L179 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 17:43:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 112 proven. 72 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-07 17:43:00,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:43:00,842 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:43:00,842 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 293 with the following transitions: [2018-11-07 17:43:00,842 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [534], [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], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 17:43:00,844 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:43:00,845 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:43:00,899 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:43:01,313 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:43:01,314 INFO L272 AbstractInterpreter]: Visited 129 different actions 635 times. Merged at 7 different actions 34 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 17:43:01,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:43:01,329 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:43:01,563 INFO L227 lantSequenceWeakener]: Weakened 289 states. On average, predicates are now at 72.72% of their original sizes. [2018-11-07 17:43:01,563 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:43:01,691 INFO L415 sIntCurrentIteration]: We unified 291 AI predicates to 291 [2018-11-07 17:43:01,692 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:43:01,692 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:43:01,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2018-11-07 17:43:01,692 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:43:01,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 17:43:01,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 17:43:01,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 17:43:01,693 INFO L87 Difference]: Start difference. First operand 3862 states and 4870 transitions. Second operand 10 states. [2018-11-07 17:43:07,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:43:07,529 INFO L93 Difference]: Finished difference Result 8284 states and 10819 transitions. [2018-11-07 17:43:07,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 17:43:07,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 292 [2018-11-07 17:43:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:43:07,552 INFO L225 Difference]: With dead ends: 8284 [2018-11-07 17:43:07,552 INFO L226 Difference]: Without dead ends: 5553 [2018-11-07 17:43:07,562 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 299 GetRequests, 283 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 17:43:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5553 states. [2018-11-07 17:43:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5553 to 5511. [2018-11-07 17:43:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5511 states. [2018-11-07 17:43:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 6883 transitions. [2018-11-07 17:43:07,696 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 6883 transitions. Word has length 292 [2018-11-07 17:43:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:43:07,697 INFO L480 AbstractCegarLoop]: Abstraction has 5511 states and 6883 transitions. [2018-11-07 17:43:07,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 17:43:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 6883 transitions. [2018-11-07 17:43:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-11-07 17:43:07,711 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:43:07,711 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 17:43:07,711 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:43:07,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:43:07,712 INFO L82 PathProgramCache]: Analyzing trace with hash 581644974, now seen corresponding path program 1 times [2018-11-07 17:43:07,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:43:07,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:43:07,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:43:07,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:43:07,713 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:43:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:43:07,982 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 17:43:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 42 proven. 154 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-07 17:43:08,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:43:08,115 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:43:08,115 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 298 with the following transitions: [2018-11-07 17:43:08,115 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [526], [527], [531], [534], [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], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 17:43:08,117 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:43:08,117 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:43:08,183 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:43:08,514 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 17:43:08,514 INFO L272 AbstractInterpreter]: Visited 130 different actions 514 times. Merged at 8 different actions 30 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 17:43:08,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:43:08,521 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 17:43:08,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:43:08,521 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 17:43:08,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:43:08,532 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 17:43:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:43:08,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 17:43:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 257 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-07 17:43:08,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 17:43:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 117 proven. 77 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-07 17:43:10,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 17:43:10,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2018-11-07 17:43:10,060 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 17:43:10,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 17:43:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 17:43:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-07 17:43:10,062 INFO L87 Difference]: Start difference. First operand 5511 states and 6883 transitions. Second operand 11 states. [2018-11-07 17:43:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:43:17,213 INFO L93 Difference]: Finished difference Result 10455 states and 13822 transitions. [2018-11-07 17:43:17,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-07 17:43:17,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 297 [2018-11-07 17:43:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:43:17,233 INFO L225 Difference]: With dead ends: 10455 [2018-11-07 17:43:17,233 INFO L226 Difference]: Without dead ends: 4183 [2018-11-07 17:43:17,259 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 601 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-11-07 17:43:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4183 states. [2018-11-07 17:43:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4183 to 3597. [2018-11-07 17:43:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3597 states. [2018-11-07 17:43:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 4144 transitions. [2018-11-07 17:43:17,389 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 4144 transitions. Word has length 297 [2018-11-07 17:43:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:43:17,389 INFO L480 AbstractCegarLoop]: Abstraction has 3597 states and 4144 transitions. [2018-11-07 17:43:17,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 17:43:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 4144 transitions. [2018-11-07 17:43:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-11-07 17:43:17,401 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:43:17,401 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 17:43:17,401 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:43:17,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:43:17,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1230776758, now seen corresponding path program 1 times [2018-11-07 17:43:17,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:43:17,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:43:17,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:43:17,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:43:17,403 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:43:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:43:17,954 WARN L179 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 8 [2018-11-07 17:43:18,321 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 17:43:18,538 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 17:43:19,008 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 17:43:19,341 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 17:43:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 42 proven. 258 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-07 17:43:19,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:43:19,515 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:43:19,515 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-11-07 17:43:19,516 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [526], [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], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [679], [683], [687], [691], [694], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 17:43:19,518 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:43:19,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:43:19,624 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:43:20,375 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 17:43:20,376 INFO L272 AbstractInterpreter]: Visited 130 different actions 514 times. Merged at 8 different actions 30 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 17:43:20,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:43:20,381 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 17:43:20,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:43:20,381 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 17:43:20,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:43:20,391 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 17:43:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:43:20,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 17:43:28,159 WARN L179 SmtUtils]: Spent 7.41 s on a formula simplification. DAG size of input: 179 DAG size of output: 47 [2018-11-07 17:43:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-07 17:43:28,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 17:43:29,091 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-07 17:43:29,811 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:29,964 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 118 [2018-11-07 17:43:31,155 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2018-11-07 17:43:31,158 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,216 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,262 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,307 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,355 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,435 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,485 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,549 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,593 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,638 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,712 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,773 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,891 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:31,985 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:32,052 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:32,131 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:32,178 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:32,239 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:32,298 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:32,406 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:32,813 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:32,906 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:32,986 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,047 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,235 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,331 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,377 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,425 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,472 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,627 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,726 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,777 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,825 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,872 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,919 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:33,965 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,013 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,074 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,122 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,172 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,219 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,292 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,354 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,399 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,444 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,494 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,539 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,586 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,639 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,685 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,728 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,772 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,817 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,901 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:34,985 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:35,028 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:35,112 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:35,159 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:35,313 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:35,361 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:35,407 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:35,452 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:35,496 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:35,891 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:35,966 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,012 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,086 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,213 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,413 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,580 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,624 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,667 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,715 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,763 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,807 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,852 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,896 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,943 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:36,987 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,078 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,150 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,197 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,243 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,288 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,347 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,400 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,449 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,510 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,574 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,629 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:37,955 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:38,000 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:38,044 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:38,439 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:38,584 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:38,851 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:38,898 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:38,945 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:39,305 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:39,350 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:39,394 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:39,437 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:39,488 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:39,565 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:39,611 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:39,656 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:39,718 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:39,763 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 17:43:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 42 proven. 261 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 17:43:40,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 17:43:40,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2018-11-07 17:43:40,575 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 17:43:40,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 17:43:40,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 17:43:40,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2018-11-07 17:43:40,577 INFO L87 Difference]: Start difference. First operand 3597 states and 4144 transitions. Second operand 16 states. [2018-11-07 17:43:47,495 WARN L179 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2018-11-07 17:43:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:43:56,300 INFO L93 Difference]: Finished difference Result 8975 states and 11230 transitions. [2018-11-07 17:43:56,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-07 17:43:56,301 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 333 [2018-11-07 17:43:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:43:56,327 INFO L225 Difference]: With dead ends: 8975 [2018-11-07 17:43:56,327 INFO L226 Difference]: Without dead ends: 6211 [2018-11-07 17:43:56,338 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 568 SyntacticMatches, 112 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=605, Invalid=2257, Unknown=0, NotChecked=0, Total=2862 [2018-11-07 17:43:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2018-11-07 17:43:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4985. [2018-11-07 17:43:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4985 states. [2018-11-07 17:43:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 5666 transitions. [2018-11-07 17:43:56,517 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 5666 transitions. Word has length 333 [2018-11-07 17:43:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:43:56,518 INFO L480 AbstractCegarLoop]: Abstraction has 4985 states and 5666 transitions. [2018-11-07 17:43:56,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 17:43:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 5666 transitions. [2018-11-07 17:43:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-11-07 17:43:56,531 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:43:56,531 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 17:43:56,531 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:43:56,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:43:56,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1230076619, now seen corresponding path program 1 times [2018-11-07 17:43:56,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:43:56,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:43:56,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:43:56,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:43:56,533 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:43:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:43:57,239 WARN L179 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-11-07 17:43:57,973 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2018-11-07 17:43:58,101 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2018-11-07 17:43:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 238 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:43:58,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:43:58,588 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:43:58,588 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 353 with the following transitions: [2018-11-07 17:43:58,588 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [526], [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], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [754], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-07 17:43:58,590 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:43:58,590 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:43:58,647 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:43:59,165 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 17:43:59,165 INFO L272 AbstractInterpreter]: Visited 145 different actions 715 times. Merged at 8 different actions 37 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 17:43:59,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:43:59,201 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 17:43:59,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:43:59,201 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 17:43:59,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:43:59,216 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 17:43:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:43:59,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 17:44:27,088 WARN L179 SmtUtils]: Spent 25.28 s on a formula simplification. DAG size of input: 271 DAG size of output: 50 [2018-11-07 17:44:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 42 proven. 199 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 17:44:29,976 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 17:44:30,097 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2018-11-07 17:44:30,899 WARN L179 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2018-11-07 17:44:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-11-07 17:44:31,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 17:44:31,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 9] total 36 [2018-11-07 17:44:31,466 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 17:44:31,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-07 17:44:31,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-07 17:44:31,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1107, Unknown=2, NotChecked=0, Total=1260 [2018-11-07 17:44:31,468 INFO L87 Difference]: Start difference. First operand 4985 states and 5666 transitions. Second operand 30 states. [2018-11-07 17:44:33,953 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 19 [2018-11-07 17:44:34,526 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2018-11-07 17:44:35,630 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2018-11-07 17:44:36,755 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2018-11-07 17:44:37,055 WARN L179 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 29 [2018-11-07 17:44:49,016 WARN L179 SmtUtils]: Spent 11.59 s on a formula simplification. DAG size of input: 90 DAG size of output: 69 Received shutdown request... [2018-11-07 17:45:00,684 WARN L187 SmtUtils]: Removed 5 from assertion stack [2018-11-07 17:45:00,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 17:45:00,684 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 17:45:00,688 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 17:45:00,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:45:00 BoogieIcfgContainer [2018-11-07 17:45:00,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 17:45:00,689 INFO L168 Benchmark]: Toolchain (without parser) took 223921.72 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 487.3 MB. Max. memory is 7.1 GB. [2018-11-07 17:45:00,691 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 17:45:00,691 INFO L168 Benchmark]: CACSL2BoogieTranslator took 699.14 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: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-11-07 17:45:00,692 INFO L168 Benchmark]: Boogie Procedure Inliner took 136.93 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 732.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.4 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2018-11-07 17:45:00,693 INFO L168 Benchmark]: Boogie Preprocessor took 94.60 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2018-11-07 17:45:00,694 INFO L168 Benchmark]: RCFGBuilder took 3214.85 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: 103.7 MB). Peak memory consumption was 103.7 MB. Max. memory is 7.1 GB. [2018-11-07 17:45:00,694 INFO L168 Benchmark]: TraceAbstraction took 219770.42 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 3.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 427.5 MB. Max. memory is 7.1 GB. [2018-11-07 17:45:00,700 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 699.14 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: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 136.93 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 732.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.4 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 94.60 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3214.85 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: 103.7 MB). Peak memory consumption was 103.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219770.42 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 3.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 427.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 40]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 40). Cancelled while BasicCegarLoop was constructing difference of abstraction (4985states) and FLOYD_HOARE automaton (currently 26 states, 30 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 83. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 216 locations, 1 error locations. TIMEOUT Result, 219.6s OverallTime, 11 OverallIterations, 4 TraceHistogramMax, 139.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1649 SDtfs, 15329 SDslu, 3202 SDs, 0 SdLazy, 23107 SolverSat, 3190 SolverUnsat, 40 SolverUnknown, 0 SolverNotchecked, 42.2s Time, PredicateUnifierStatistics: 14 DeclaredPredicates, 3690 GetRequests, 3261 SyntacticMatches, 122 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3859 ImplicationChecksByTransitivity, 77.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5511occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.1s AbstIntTime, 10 AbstIntIterations, 7 AbstIntStrong, 0.9963536306470274 AbsIntWeakeningRatio, 0.12642905178211164 AbsIntAvgWeakeningVarsNumRemoved, 18.19569603227976 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 10 MinimizatonAttempts, 3195 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 64.8s InterpolantComputationTime, 3477 NumberOfCodeBlocks, 3477 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 4442 ConstructedInterpolants, 140 QuantifiedInterpolants, 14831945 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1609 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 2434/3645 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown