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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label30_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:54:07,384 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:54:07,388 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:54:07,404 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:54:07,404 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:54:07,406 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:54:07,408 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:54:07,410 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:54:07,413 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:54:07,415 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:54:07,416 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:54:07,416 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:54:07,419 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:54:07,420 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:54:07,421 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:54:07,425 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:54:07,426 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:54:07,435 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:54:07,437 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:54:07,439 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:54:07,442 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:54:07,444 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:54:07,446 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:54:07,446 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:54:07,446 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:54:07,449 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:54:07,450 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:54:07,451 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:54:07,452 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:54:07,456 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:54:07,456 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:54:07,456 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:54:07,458 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:54:07,458 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:54:07,459 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:54:07,460 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:54:07,461 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.epf [2018-11-07 15:54:07,489 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:54:07,489 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:54:07,490 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:54:07,490 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:54:07,490 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:54:07,491 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:54:07,491 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:54:07,491 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:54:07,491 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:54:07,491 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:54:07,491 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:54:07,492 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:54:07,492 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:54:07,493 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:54:07,493 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:54:07,493 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:54:07,493 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:54:07,493 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:54:07,493 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:54:07,494 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:54:07,494 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:54:07,494 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:54:07,494 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:54:07,494 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:54:07,495 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:54:07,495 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:54:07,495 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:54:07,495 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:54:07,495 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:54:07,495 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:54:07,496 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:54:07,496 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:54:07,496 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:54:07,496 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:54:07,565 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:54:07,581 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:54:07,585 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:54:07,587 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:54:07,587 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:54:07,588 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label30_true-unreach-call.c [2018-11-07 15:54:07,649 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d70d5cda/41b69e2b7c374a89b020845cd058a931/FLAGe5e7d8436 [2018-11-07 15:54:08,572 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:54:08,573 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label30_true-unreach-call.c [2018-11-07 15:54:08,616 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d70d5cda/41b69e2b7c374a89b020845cd058a931/FLAGe5e7d8436 [2018-11-07 15:54:08,636 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d70d5cda/41b69e2b7c374a89b020845cd058a931 [2018-11-07 15:54:08,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:54:08,651 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:54:08,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:54:08,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:54:08,657 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:54:08,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:54:08" (1/1) ... [2018-11-07 15:54:08,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660524f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:08, skipping insertion in model container [2018-11-07 15:54:08,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:54:08" (1/1) ... [2018-11-07 15:54:08,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:54:08,926 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:54:11,052 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:54:11,058 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:54:12,291 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:54:12,357 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:54:12,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12 WrapperNode [2018-11-07 15:54:12,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:54:12,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:54:12,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:54:12,360 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:54:12,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (1/1) ... [2018-11-07 15:54:12,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (1/1) ... [2018-11-07 15:54:12,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:54:12,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:54:12,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:54:12,888 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:54:12,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (1/1) ... [2018-11-07 15:54:12,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (1/1) ... [2018-11-07 15:54:12,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (1/1) ... [2018-11-07 15:54:12,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (1/1) ... [2018-11-07 15:54:13,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (1/1) ... [2018-11-07 15:54:13,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (1/1) ... [2018-11-07 15:54:13,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (1/1) ... [2018-11-07 15:54:13,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:54:13,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:54:13,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:54:13,305 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:54:13,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (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 15:54:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:54:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:54:13,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:54:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2018-11-07 15:54:13,380 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2018-11-07 15:54:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2018-11-07 15:54:13,380 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2018-11-07 15:54:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-07 15:54:13,381 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-07 15:54:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 15:54:13,381 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 15:54:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:54:13,382 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:54:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:54:13,382 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:54:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:54:13,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:54:13,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:54:13,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:54:27,486 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:54:27,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:54:27 BoogieIcfgContainer [2018-11-07 15:54:27,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:54:27,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:54:27,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:54:27,491 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:54:27,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:54:08" (1/3) ... [2018-11-07 15:54:27,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6838d809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:54:27, skipping insertion in model container [2018-11-07 15:54:27,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:54:12" (2/3) ... [2018-11-07 15:54:27,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6838d809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:54:27, skipping insertion in model container [2018-11-07 15:54:27,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:54:27" (3/3) ... [2018-11-07 15:54:27,495 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label30_true-unreach-call.c [2018-11-07 15:54:27,506 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:54:27,516 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:54:27,534 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:54:27,589 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:54:27,589 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:54:27,589 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:54:27,589 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:54:27,589 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:54:27,590 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:54:27,590 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:54:27,590 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:54:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states. [2018-11-07 15:54:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-07 15:54:27,656 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:54:27,657 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] [2018-11-07 15:54:27,660 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:54:27,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:54:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1703893274, now seen corresponding path program 1 times [2018-11-07 15:54:27,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:54:27,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:54:27,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:54:27,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:54:27,723 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:54:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:54:28,237 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 15:54:28,240 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:54:28,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 15:54:28,240 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:54:28,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 15:54:28,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 15:54:28,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 15:54:28,271 INFO L87 Difference]: Start difference. First operand 1778 states. Second operand 3 states. [2018-11-07 15:54:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:54:41,745 INFO L93 Difference]: Finished difference Result 4999 states and 9420 transitions. [2018-11-07 15:54:41,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 15:54:41,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2018-11-07 15:54:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:54:41,790 INFO L225 Difference]: With dead ends: 4999 [2018-11-07 15:54:41,790 INFO L226 Difference]: Without dead ends: 3219 [2018-11-07 15:54:41,803 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 15:54:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2018-11-07 15:54:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3215. [2018-11-07 15:54:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3215 states. [2018-11-07 15:54:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 5845 transitions. [2018-11-07 15:54:42,045 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 5845 transitions. Word has length 55 [2018-11-07 15:54:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:54:42,046 INFO L480 AbstractCegarLoop]: Abstraction has 3215 states and 5845 transitions. [2018-11-07 15:54:42,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 15:54:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 5845 transitions. [2018-11-07 15:54:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-07 15:54:42,059 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:54:42,060 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, 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] [2018-11-07 15:54:42,060 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:54:42,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:54:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1692857214, now seen corresponding path program 1 times [2018-11-07 15:54:42,061 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:54:42,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:54:42,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:54:42,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:54:42,063 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:54:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:54:42,415 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:54:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:54:42,787 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:54:42,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:54:42,789 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:54:42,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:54:42,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:54:42,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:54:42,793 INFO L87 Difference]: Start difference. First operand 3215 states and 5845 transitions. Second operand 6 states. [2018-11-07 15:55:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:55:05,977 INFO L93 Difference]: Finished difference Result 9331 states and 16910 transitions. [2018-11-07 15:55:05,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:55:05,978 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2018-11-07 15:55:05,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:55:06,016 INFO L225 Difference]: With dead ends: 9331 [2018-11-07 15:55:06,017 INFO L226 Difference]: Without dead ends: 6122 [2018-11-07 15:55:06,028 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:55:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6122 states. [2018-11-07 15:55:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6122 to 6084. [2018-11-07 15:55:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6084 states. [2018-11-07 15:55:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6084 states to 6084 states and 9616 transitions. [2018-11-07 15:55:06,211 INFO L78 Accepts]: Start accepts. Automaton has 6084 states and 9616 transitions. Word has length 127 [2018-11-07 15:55:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:55:06,212 INFO L480 AbstractCegarLoop]: Abstraction has 6084 states and 9616 transitions. [2018-11-07 15:55:06,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:55:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 6084 states and 9616 transitions. [2018-11-07 15:55:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-07 15:55:06,217 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:55:06,217 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, 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 15:55:06,217 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:55:06,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:55:06,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2052765116, now seen corresponding path program 1 times [2018-11-07 15:55:06,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:55:06,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:55:06,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:55:06,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:55:06,219 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:55:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:55:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:55:06,548 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:55:06,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:55:06,548 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:55:06,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:55:06,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:55:06,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:55:06,549 INFO L87 Difference]: Start difference. First operand 6084 states and 9616 transitions. Second operand 6 states. [2018-11-07 15:55:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:55:33,829 INFO L93 Difference]: Finished difference Result 24230 states and 39674 transitions. [2018-11-07 15:55:33,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 15:55:33,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2018-11-07 15:55:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:55:33,926 INFO L225 Difference]: With dead ends: 24230 [2018-11-07 15:55:33,926 INFO L226 Difference]: Without dead ends: 18152 [2018-11-07 15:55:33,965 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 15:55:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18152 states. [2018-11-07 15:55:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18152 to 18076. [2018-11-07 15:55:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18076 states. [2018-11-07 15:55:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18076 states to 18076 states and 25600 transitions. [2018-11-07 15:55:34,477 INFO L78 Accepts]: Start accepts. Automaton has 18076 states and 25600 transitions. Word has length 145 [2018-11-07 15:55:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:55:34,478 INFO L480 AbstractCegarLoop]: Abstraction has 18076 states and 25600 transitions. [2018-11-07 15:55:34,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:55:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 18076 states and 25600 transitions. [2018-11-07 15:55:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-07 15:55:34,486 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:55:34,487 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, 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] [2018-11-07 15:55:34,487 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:55:34,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:55:34,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1705394297, now seen corresponding path program 1 times [2018-11-07 15:55:34,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:55:34,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:55:34,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:55:34,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:55:34,494 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:55:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:55:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:55:34,846 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:55:34,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:55:34,846 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:55:34,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:55:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:55:34,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:55:34,848 INFO L87 Difference]: Start difference. First operand 18076 states and 25600 transitions. Second operand 5 states. [2018-11-07 15:55:51,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:55:51,018 INFO L93 Difference]: Finished difference Result 56174 states and 84470 transitions. [2018-11-07 15:55:51,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 15:55:51,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2018-11-07 15:55:51,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:55:51,208 INFO L225 Difference]: With dead ends: 56174 [2018-11-07 15:55:51,209 INFO L226 Difference]: Without dead ends: 38104 [2018-11-07 15:55:51,271 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:55:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38104 states. [2018-11-07 15:55:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38104 to 36920. [2018-11-07 15:55:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36920 states. [2018-11-07 15:55:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36920 states to 36920 states and 49674 transitions. [2018-11-07 15:55:52,196 INFO L78 Accepts]: Start accepts. Automaton has 36920 states and 49674 transitions. Word has length 190 [2018-11-07 15:55:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:55:52,196 INFO L480 AbstractCegarLoop]: Abstraction has 36920 states and 49674 transitions. [2018-11-07 15:55:52,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:55:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 36920 states and 49674 transitions. [2018-11-07 15:55:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-07 15:55:52,206 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:55:52,207 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2018-11-07 15:55:52,207 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:55:52,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:55:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash -680528982, now seen corresponding path program 1 times [2018-11-07 15:55:52,208 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:55:52,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:55:52,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:55:52,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:55:52,209 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:55:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:55:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 15:55:52,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:55:52,736 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:55:52,738 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-11-07 15:55:52,746 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5554], [5562], [5566], [5568], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5745], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5781], [6802], [6806], [6810], [6816], [6820], [6822], [6837], [6838], [6839], [6841], [6842] [2018-11-07 15:55:52,805 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:55:52,806 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:55:53,387 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:55:53,389 INFO L272 AbstractInterpreter]: Visited 87 different actions 87 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 15:55:53,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:55:53,432 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:55:54,045 INFO L227 lantSequenceWeakener]: Weakened 201 states. On average, predicates are now at 75.68% of their original sizes. [2018-11-07 15:55:54,045 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:55:54,688 INFO L415 sIntCurrentIteration]: We unified 209 AI predicates to 209 [2018-11-07 15:55:54,689 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:55:54,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:55:54,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 15:55:54,690 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:55:54,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 15:55:54,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 15:55:54,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 15:55:54,691 INFO L87 Difference]: Start difference. First operand 36920 states and 49674 transitions. Second operand 7 states. [2018-11-07 15:56:00,339 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown