java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label33_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:53:43,333 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:53:43,335 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:53:43,353 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:53:43,353 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:53:43,354 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:53:43,355 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:53:43,357 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:53:43,359 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:53:43,360 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:53:43,361 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:53:43,361 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:53:43,362 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:53:43,363 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:53:43,365 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:53:43,365 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:53:43,366 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:53:43,368 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:53:43,370 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:53:43,372 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:53:43,373 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:53:43,375 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:53:43,377 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:53:43,378 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:53:43,378 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:53:43,379 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:53:43,380 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:53:43,381 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:53:43,382 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:53:43,383 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:53:43,383 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:53:43,387 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:53:43,387 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:53:43,387 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:53:43,389 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:53:43,389 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:53:43,390 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:53:43,420 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:53:43,421 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:53:43,422 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:53:43,422 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:53:43,422 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:53:43,422 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:53:43,423 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:53:43,423 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:53:43,423 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:53:43,423 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:53:43,423 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:53:43,424 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:53:43,424 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:53:43,425 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:53:43,425 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:53:43,425 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:53:43,425 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:53:43,425 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:53:43,426 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:53:43,426 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:53:43,426 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:53:43,426 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:53:43,426 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:53:43,427 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:53:43,427 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:53:43,427 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:53:43,427 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:53:43,428 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:53:43,428 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:53:43,428 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:53:43,428 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:53:43,428 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:53:43,428 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:53:43,429 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:53:43,429 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:53:43,475 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:53:43,490 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:53:43,495 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:53:43,497 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:53:43,498 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:53:43,499 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label33_true-unreach-call.c [2018-11-07 18:53:43,565 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46c9cefb3/89700c41710c4208b60d071ff27201f4/FLAG271be577e [2018-11-07 18:53:44,278 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:53:44,279 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label33_true-unreach-call.c [2018-11-07 18:53:44,297 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46c9cefb3/89700c41710c4208b60d071ff27201f4/FLAG271be577e [2018-11-07 18:53:44,317 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46c9cefb3/89700c41710c4208b60d071ff27201f4 [2018-11-07 18:53:44,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:53:44,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:53:44,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:53:44,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:53:44,336 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:53:44,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:53:44" (1/1) ... [2018-11-07 18:53:44,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f02a909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:44, skipping insertion in model container [2018-11-07 18:53:44,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:53:44" (1/1) ... [2018-11-07 18:53:44,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:53:44,454 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:53:45,208 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:53:45,213 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:53:45,527 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:53:45,552 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:53:45,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45 WrapperNode [2018-11-07 18:53:45,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:53:45,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:53:45,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:53:45,555 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:53:45,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (1/1) ... [2018-11-07 18:53:45,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (1/1) ... [2018-11-07 18:53:45,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:53:45,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:53:45,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:53:45,773 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:53:45,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (1/1) ... [2018-11-07 18:53:45,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (1/1) ... [2018-11-07 18:53:45,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (1/1) ... [2018-11-07 18:53:45,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (1/1) ... [2018-11-07 18:53:45,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (1/1) ... [2018-11-07 18:53:45,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (1/1) ... [2018-11-07 18:53:45,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (1/1) ... [2018-11-07 18:53:45,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:53:45,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:53:45,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:53:45,898 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:53:45,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:53:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:53:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:53:45,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:53:45,983 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:53:45,984 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:53:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:53:45,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:53:45,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:53:45,984 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:53:50,940 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:53:50,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:53:50 BoogieIcfgContainer [2018-11-07 18:53:50,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:53:50,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:53:50,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:53:50,947 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:53:50,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:53:44" (1/3) ... [2018-11-07 18:53:50,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511d44c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:53:50, skipping insertion in model container [2018-11-07 18:53:50,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:53:45" (2/3) ... [2018-11-07 18:53:50,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511d44c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:53:50, skipping insertion in model container [2018-11-07 18:53:50,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:53:50" (3/3) ... [2018-11-07 18:53:50,953 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label33_true-unreach-call.c [2018-11-07 18:53:50,964 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:53:50,976 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:53:50,996 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:53:51,053 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:53:51,053 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:53:51,053 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:53:51,053 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:53:51,053 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:53:51,054 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:53:51,054 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:53:51,054 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:53:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 18:53:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-11-07 18:53:51,103 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:53:51,104 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:53:51,106 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:53:51,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:51,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1523198655, now seen corresponding path program 1 times [2018-11-07 18:53:51,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:53:51,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:51,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:51,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:51,166 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:53:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:52,103 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 18:53:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:52,481 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:53:52,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:53:52,482 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:53:52,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:53:52,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:53:52,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:53:52,509 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-07 18:53:55,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:53:55,987 INFO L93 Difference]: Finished difference Result 1074 states and 1924 transitions. [2018-11-07 18:53:55,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:53:55,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2018-11-07 18:53:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:53:56,016 INFO L225 Difference]: With dead ends: 1074 [2018-11-07 18:53:56,016 INFO L226 Difference]: Without dead ends: 756 [2018-11-07 18:53:56,024 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:53:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2018-11-07 18:53:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 520. [2018-11-07 18:53:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-11-07 18:53:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 919 transitions. [2018-11-07 18:53:56,114 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 919 transitions. Word has length 166 [2018-11-07 18:53:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:53:56,115 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 919 transitions. [2018-11-07 18:53:56,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:53:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 919 transitions. [2018-11-07 18:53:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-11-07 18:53:56,123 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:53:56,125 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:53:56,126 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:53:56,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:56,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1150384964, now seen corresponding path program 1 times [2018-11-07 18:53:56,126 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:53:56,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:56,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:56,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:56,133 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:53:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:56,439 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:53:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:56,516 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:53:56,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:53:56,516 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:53:56,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:53:56,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:53:56,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:53:56,519 INFO L87 Difference]: Start difference. First operand 520 states and 919 transitions. Second operand 6 states. [2018-11-07 18:53:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:53:59,139 INFO L93 Difference]: Finished difference Result 1482 states and 2700 transitions. [2018-11-07 18:53:59,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:53:59,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 194 [2018-11-07 18:53:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:53:59,150 INFO L225 Difference]: With dead ends: 1482 [2018-11-07 18:53:59,151 INFO L226 Difference]: Without dead ends: 968 [2018-11-07 18:53:59,154 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:53:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2018-11-07 18:53:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 949. [2018-11-07 18:53:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2018-11-07 18:53:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1579 transitions. [2018-11-07 18:53:59,218 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1579 transitions. Word has length 194 [2018-11-07 18:53:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:53:59,218 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 1579 transitions. [2018-11-07 18:53:59,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:53:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1579 transitions. [2018-11-07 18:53:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-11-07 18:53:59,224 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:53:59,225 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:53:59,225 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:53:59,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:53:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash 657963577, now seen corresponding path program 1 times [2018-11-07 18:53:59,226 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:53:59,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:59,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:53:59,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:53:59,227 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:53:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:53:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:53:59,623 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:53:59,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:53:59,623 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:53:59,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:53:59,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:53:59,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:53:59,625 INFO L87 Difference]: Start difference. First operand 949 states and 1579 transitions. Second operand 4 states. [2018-11-07 18:54:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:54:03,043 INFO L93 Difference]: Finished difference Result 3400 states and 5827 transitions. [2018-11-07 18:54:03,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:54:03,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 212 [2018-11-07 18:54:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:54:03,073 INFO L225 Difference]: With dead ends: 3400 [2018-11-07 18:54:03,073 INFO L226 Difference]: Without dead ends: 2457 [2018-11-07 18:54:03,080 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:54:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2018-11-07 18:54:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2438. [2018-11-07 18:54:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2018-11-07 18:54:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 3885 transitions. [2018-11-07 18:54:03,199 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 3885 transitions. Word has length 212 [2018-11-07 18:54:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:54:03,200 INFO L480 AbstractCegarLoop]: Abstraction has 2438 states and 3885 transitions. [2018-11-07 18:54:03,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:54:03,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 3885 transitions. [2018-11-07 18:54:03,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-11-07 18:54:03,215 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:54:03,215 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:54:03,216 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:54:03,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:54:03,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1742559296, now seen corresponding path program 1 times [2018-11-07 18:54:03,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:54:03,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:54:03,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:54:03,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:54:03,218 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:54:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:54:03,587 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:54:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 53 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-07 18:54:03,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:54:03,630 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:54:03,631 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 231 with the following transitions: [2018-11-07 18:54:03,633 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [71], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [789], [791], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:54:03,696 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:54:03,697 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:54:05,113 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:54:05,115 INFO L272 AbstractInterpreter]: Visited 168 different actions 168 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 18:54:05,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:54:05,162 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:54:06,495 INFO L227 lantSequenceWeakener]: Weakened 216 states. On average, predicates are now at 71.11% of their original sizes. [2018-11-07 18:54:06,495 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:54:08,603 INFO L415 sIntCurrentIteration]: We unified 229 AI predicates to 229 [2018-11-07 18:54:08,603 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:54:08,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:54:08,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-11-07 18:54:08,605 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:54:08,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:54:08,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:54:08,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-11-07 18:54:08,610 INFO L87 Difference]: Start difference. First operand 2438 states and 3885 transitions. Second operand 17 states. [2018-11-07 18:54:46,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:54:46,495 INFO L93 Difference]: Finished difference Result 5080 states and 8073 transitions. [2018-11-07 18:54:46,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:54:46,495 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 230 [2018-11-07 18:54:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:54:46,510 INFO L225 Difference]: With dead ends: 5080 [2018-11-07 18:54:46,510 INFO L226 Difference]: Without dead ends: 2648 [2018-11-07 18:54:46,518 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 232 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:54:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2018-11-07 18:54:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2646. [2018-11-07 18:54:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2646 states. [2018-11-07 18:54:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 4103 transitions. [2018-11-07 18:54:46,593 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 4103 transitions. Word has length 230 [2018-11-07 18:54:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:54:46,594 INFO L480 AbstractCegarLoop]: Abstraction has 2646 states and 4103 transitions. [2018-11-07 18:54:46,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:54:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 4103 transitions. [2018-11-07 18:54:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-11-07 18:54:46,605 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:54:46,605 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:54:46,605 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:54:46,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:54:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash -902535293, now seen corresponding path program 1 times [2018-11-07 18:54:46,606 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:54:46,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:54:46,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:54:46,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:54:46,608 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:54:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:54:46,882 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:54:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 73 proven. 39 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-07 18:54:47,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:54:47,310 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:54:47,310 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 243 with the following transitions: [2018-11-07 18:54:47,311 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [71], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [789], [791], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:54:47,324 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:54:47,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:54:49,056 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:54:49,057 INFO L272 AbstractInterpreter]: Visited 172 different actions 340 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:54:49,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:54:49,063 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:54:50,899 INFO L227 lantSequenceWeakener]: Weakened 70 states. On average, predicates are now at 75.13% of their original sizes. [2018-11-07 18:54:50,900 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:54:53,700 INFO L415 sIntCurrentIteration]: We unified 241 AI predicates to 241 [2018-11-07 18:54:53,700 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:54:53,701 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:54:53,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [29] imperfect sequences [6] total 33 [2018-11-07 18:54:53,701 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:54:53,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-07 18:54:53,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-07 18:54:53,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2018-11-07 18:54:53,703 INFO L87 Difference]: Start difference. First operand 2646 states and 4103 transitions. Second operand 29 states. [2018-11-07 18:56:06,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:56:06,154 INFO L93 Difference]: Finished difference Result 5507 states and 8618 transitions. [2018-11-07 18:56:06,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 18:56:06,154 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 242 [2018-11-07 18:56:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:56:06,169 INFO L225 Difference]: With dead ends: 5507 [2018-11-07 18:56:06,170 INFO L226 Difference]: Without dead ends: 3075 [2018-11-07 18:56:06,179 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 256 GetRequests, 198 SyntacticMatches, 16 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=384, Invalid=1508, Unknown=0, NotChecked=0, Total=1892 [2018-11-07 18:56:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2018-11-07 18:56:06,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 3065. [2018-11-07 18:56:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3065 states. [2018-11-07 18:56:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 4556 transitions. [2018-11-07 18:56:06,265 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 4556 transitions. Word has length 242 [2018-11-07 18:56:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:56:06,265 INFO L480 AbstractCegarLoop]: Abstraction has 3065 states and 4556 transitions. [2018-11-07 18:56:06,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-07 18:56:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 4556 transitions. [2018-11-07 18:56:06,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-11-07 18:56:06,276 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:56:06,276 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:56:06,277 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:56:06,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash 644413327, now seen corresponding path program 1 times [2018-11-07 18:56:06,277 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:56:06,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:06,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:56:06,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:06,279 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:56:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:56:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-07 18:56:06,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:56:06,557 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:56:06,557 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 253 with the following transitions: [2018-11-07 18:56:06,558 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [71], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [789], [791], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:56:06,580 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:56:06,581 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:56:08,246 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:56:08,246 INFO L272 AbstractInterpreter]: Visited 172 different actions 337 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 18:56:08,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:08,250 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:56:09,349 INFO L227 lantSequenceWeakener]: Weakened 247 states. On average, predicates are now at 70.99% of their original sizes. [2018-11-07 18:56:09,350 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:56:09,753 INFO L415 sIntCurrentIteration]: We unified 251 AI predicates to 251 [2018-11-07 18:56:09,754 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:56:09,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:56:09,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 23 [2018-11-07 18:56:09,754 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:56:09,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 18:56:09,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 18:56:09,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:56:09,756 INFO L87 Difference]: Start difference. First operand 3065 states and 4556 transitions. Second operand 19 states. [2018-11-07 18:57:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:57:08,952 INFO L93 Difference]: Finished difference Result 7380 states and 11210 transitions. [2018-11-07 18:57:08,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:57:08,952 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 252 [2018-11-07 18:57:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:57:08,974 INFO L225 Difference]: With dead ends: 7380 [2018-11-07 18:57:08,974 INFO L226 Difference]: Without dead ends: 4948 [2018-11-07 18:57:08,985 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 260 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2018-11-07 18:57:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2018-11-07 18:57:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 4736. [2018-11-07 18:57:09,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4736 states. [2018-11-07 18:57:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4736 states to 4736 states and 6468 transitions. [2018-11-07 18:57:09,108 INFO L78 Accepts]: Start accepts. Automaton has 4736 states and 6468 transitions. Word has length 252 [2018-11-07 18:57:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:57:09,109 INFO L480 AbstractCegarLoop]: Abstraction has 4736 states and 6468 transitions. [2018-11-07 18:57:09,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 18:57:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4736 states and 6468 transitions. [2018-11-07 18:57:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-11-07 18:57:09,125 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:57:09,125 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:57:09,126 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:57:09,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:57:09,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1103027466, now seen corresponding path program 1 times [2018-11-07 18:57:09,126 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:57:09,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:57:09,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:57:09,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:57:09,128 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:57:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:57:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 151 proven. 30 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-11-07 18:57:09,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:57:09,626 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:57:09,627 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 279 with the following transitions: [2018-11-07 18:57:09,627 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [71], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [789], [791], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:57:09,633 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:57:09,634 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:57:11,762 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:57:11,762 INFO L272 AbstractInterpreter]: Visited 174 different actions 519 times. Merged at 7 different actions 21 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 18:57:11,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:57:11,770 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:57:11,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:57:11,770 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:57:11,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:57:11,781 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:57:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:57:12,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:57:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 18:57:12,618 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:57:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 147 proven. 10 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-07 18:57:13,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:57:13,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 18:57:13,219 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:57:13,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:57:13,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:57:13,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:57:13,220 INFO L87 Difference]: Start difference. First operand 4736 states and 6468 transitions. Second operand 9 states. [2018-11-07 18:57:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:57:17,006 INFO L93 Difference]: Finished difference Result 11197 states and 16705 transitions. [2018-11-07 18:57:17,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:57:17,007 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 278 [2018-11-07 18:57:17,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:57:17,043 INFO L225 Difference]: With dead ends: 11197 [2018-11-07 18:57:17,043 INFO L226 Difference]: Without dead ends: 7900 [2018-11-07 18:57:17,063 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 556 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:57:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2018-11-07 18:57:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 7694. [2018-11-07 18:57:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7694 states. [2018-11-07 18:57:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 10339 transitions. [2018-11-07 18:57:17,290 INFO L78 Accepts]: Start accepts. Automaton has 7694 states and 10339 transitions. Word has length 278 [2018-11-07 18:57:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:57:17,290 INFO L480 AbstractCegarLoop]: Abstraction has 7694 states and 10339 transitions. [2018-11-07 18:57:17,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:57:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7694 states and 10339 transitions. [2018-11-07 18:57:17,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-11-07 18:57:17,315 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:57:17,316 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:57:17,316 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:57:17,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:57:17,317 INFO L82 PathProgramCache]: Analyzing trace with hash 570820074, now seen corresponding path program 1 times [2018-11-07 18:57:17,317 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:57:17,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:57:17,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:57:17,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:57:17,318 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:57:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:57:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:57:17,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:57:17,926 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:57:17,927 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 296 with the following transitions: [2018-11-07 18:57:17,927 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [789], [791], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:57:17,938 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:57:17,938 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:57:22,193 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:57:22,193 INFO L272 AbstractInterpreter]: Visited 171 different actions 510 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 18:57:22,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:57:22,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:57:22,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:57:22,205 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:57:22,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:57:22,214 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:57:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:57:22,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:57:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:57:22,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:57:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:57:22,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:57:22,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-11-07 18:57:22,885 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:57:22,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:57:22,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:57:22,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:57:22,887 INFO L87 Difference]: Start difference. First operand 7694 states and 10339 transitions. Second operand 7 states. [2018-11-07 18:57:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:57:26,399 INFO L93 Difference]: Finished difference Result 24817 states and 37283 transitions. [2018-11-07 18:57:26,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 18:57:26,399 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 295 [2018-11-07 18:57:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:57:26,495 INFO L225 Difference]: With dead ends: 24817 [2018-11-07 18:57:26,495 INFO L226 Difference]: Without dead ends: 17337 [2018-11-07 18:57:26,553 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 589 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:57:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17337 states. [2018-11-07 18:57:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17337 to 16564. [2018-11-07 18:57:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16564 states. [2018-11-07 18:57:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16564 states to 16564 states and 22443 transitions. [2018-11-07 18:57:27,068 INFO L78 Accepts]: Start accepts. Automaton has 16564 states and 22443 transitions. Word has length 295 [2018-11-07 18:57:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:57:27,068 INFO L480 AbstractCegarLoop]: Abstraction has 16564 states and 22443 transitions. [2018-11-07 18:57:27,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:57:27,069 INFO L276 IsEmpty]: Start isEmpty. Operand 16564 states and 22443 transitions. [2018-11-07 18:57:27,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-11-07 18:57:27,115 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:57:27,115 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:57:27,115 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:57:27,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:57:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash -493299197, now seen corresponding path program 1 times [2018-11-07 18:57:27,116 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:57:27,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:57:27,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:57:27,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:57:27,117 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:57:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:57:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 154 proven. 14 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-11-07 18:57:27,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:57:27,707 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:57:27,707 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 318 with the following transitions: [2018-11-07 18:57:27,708 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [20], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [789], [791], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:57:27,713 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:57:27,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:57:32,594 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:57:32,594 INFO L272 AbstractInterpreter]: Visited 175 different actions 698 times. Merged at 9 different actions 37 times. Never widened. Found 9 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 18:57:32,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:57:32,601 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:57:32,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:57:32,601 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:57:32,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:57:32,612 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:57:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:57:32,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:57:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 195 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-07 18:57:33,027 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:57:33,181 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 18:57:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 195 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-07 18:57:33,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:57:33,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-11-07 18:57:33,432 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:57:33,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:57:33,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:57:33,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:57:33,434 INFO L87 Difference]: Start difference. First operand 16564 states and 22443 transitions. Second operand 8 states. Received shutdown request... [2018-11-07 18:57:35,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-07 18:57:35,469 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:57:35,474 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:57:35,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:57:35 BoogieIcfgContainer [2018-11-07 18:57:35,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:57:35,476 INFO L168 Benchmark]: Toolchain (without parser) took 231146.03 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-11-07 18:57:35,477 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:57:35,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1221.87 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:57:35,478 INFO L168 Benchmark]: Boogie Procedure Inliner took 218.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -860.1 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:57:35,479 INFO L168 Benchmark]: Boogie Preprocessor took 124.25 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:57:35,479 INFO L168 Benchmark]: RCFGBuilder took 5044.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 274.6 MB). Peak memory consumption was 274.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:57:35,480 INFO L168 Benchmark]: TraceAbstraction took 224531.27 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 2.6 GB in the end (delta: -733.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-07 18:57:35,485 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 1221.87 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 218.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -860.1 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.25 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5044.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 274.6 MB). Peak memory consumption was 274.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224531.27 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 2.6 GB in the end (delta: -733.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1512]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1512). Cancelled while BasicCegarLoop was constructing difference of abstraction (16564states) and FLOYD_HOARE automaton (currently 22 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (1796 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 224.4s OverallTime, 9 OverallIterations, 6 TraceHistogramMax, 188.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1802 SDtfs, 11406 SDslu, 3816 SDs, 0 SdLazy, 19288 SolverSat, 2678 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 118.1s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 2610 GetRequests, 2441 SyntacticMatches, 25 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16564occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 16.2s AbstIntTime, 6 AbstIntIterations, 3 AbstIntStrong, 0.9986598186428518 AbsIntWeakeningRatio, 0.3356449375866852 AbsIntAvgWeakeningVarsNumRemoved, 55.62135922330097 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 1477 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 3076 NumberOfCodeBlocks, 3076 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 3951 ConstructedInterpolants, 0 QuantifiedInterpolants, 1905506 SizeOfPredicates, 2 NumberOfNonLiveVariables, 4124 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 2159/2322 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown