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_label34_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:55:58,665 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:55:58,668 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:55:58,684 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:55:58,684 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:55:58,685 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:55:58,687 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:55:58,690 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:55:58,693 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:55:58,694 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:55:58,703 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:55:58,703 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:55:58,704 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:55:58,709 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:55:58,711 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:55:58,711 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:55:58,712 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:55:58,714 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:55:58,716 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:55:58,717 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:55:58,718 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:55:58,719 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:55:58,722 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:55:58,722 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:55:58,722 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:55:58,723 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:55:58,724 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:55:58,725 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:55:58,725 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:55:58,727 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:55:58,727 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:55:58,728 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:55:58,728 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:55:58,728 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:55:58,729 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:55:58,730 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:55:58,730 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 18:55:58,746 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:55:58,746 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:55:58,747 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:55:58,747 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:55:58,747 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:55:58,747 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:55:58,748 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:55:58,748 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:55:58,748 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:55:58,748 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:55:58,749 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:55:58,749 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:55:58,749 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:55:58,750 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:55:58,750 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:55:58,750 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:55:58,750 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:55:58,750 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:55:58,751 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:55:58,751 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:55:58,751 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:55:58,751 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:55:58,752 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:55:58,752 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:55:58,752 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:55:58,752 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:55:58,752 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:55:58,753 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:55:58,753 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:55:58,753 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:55:58,753 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:55:58,753 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:55:58,754 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:55:58,754 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:55:58,754 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:55:58,815 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:55:58,833 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:55:58,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:55:58,839 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:55:58,840 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:55:58,841 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label34_true-unreach-call.c [2018-11-07 18:55:58,909 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166dbd4f7/7479719cf6104f808aa7f5d12ad0f014/FLAGe73f7f199 [2018-11-07 18:55:59,612 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:55:59,613 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label34_true-unreach-call.c [2018-11-07 18:55:59,630 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166dbd4f7/7479719cf6104f808aa7f5d12ad0f014/FLAGe73f7f199 [2018-11-07 18:55:59,649 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166dbd4f7/7479719cf6104f808aa7f5d12ad0f014 [2018-11-07 18:55:59,661 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:55:59,664 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:55:59,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:55:59,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:55:59,670 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:55:59,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:55:59" (1/1) ... [2018-11-07 18:55:59,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c02dd87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:55:59, skipping insertion in model container [2018-11-07 18:55:59,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:55:59" (1/1) ... [2018-11-07 18:55:59,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:55:59,787 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:56:00,531 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:56:00,538 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:56:00,758 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:56:00,799 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:56:00,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00 WrapperNode [2018-11-07 18:56:00,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:56:00,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:56:00,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:56:00,802 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:56:00,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (1/1) ... [2018-11-07 18:56:01,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (1/1) ... [2018-11-07 18:56:01,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:56:01,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:56:01,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:56:01,015 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:56:01,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (1/1) ... [2018-11-07 18:56:01,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (1/1) ... [2018-11-07 18:56:01,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (1/1) ... [2018-11-07 18:56:01,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (1/1) ... [2018-11-07 18:56:01,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (1/1) ... [2018-11-07 18:56:01,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (1/1) ... [2018-11-07 18:56:01,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (1/1) ... [2018-11-07 18:56:01,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:56:01,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:56:01,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:56:01,175 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:56:01,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (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 18:56:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:56:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:56:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:56:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:56:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:56:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:56:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:56:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:56:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:56:06,279 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:56:06,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:56:06 BoogieIcfgContainer [2018-11-07 18:56:06,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:56:06,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:56:06,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:56:06,286 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:56:06,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:55:59" (1/3) ... [2018-11-07 18:56:06,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100be2ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:56:06, skipping insertion in model container [2018-11-07 18:56:06,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:56:00" (2/3) ... [2018-11-07 18:56:06,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100be2ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:56:06, skipping insertion in model container [2018-11-07 18:56:06,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:56:06" (3/3) ... [2018-11-07 18:56:06,290 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label34_true-unreach-call.c [2018-11-07 18:56:06,301 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:56:06,311 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:56:06,330 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:56:06,371 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:56:06,372 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:56:06,372 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:56:06,372 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:56:06,372 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:56:06,373 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:56:06,373 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:56:06,373 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:56:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 18:56:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-11-07 18:56:06,429 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:56:06,431 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, 1, 1, 1, 1, 1, 1, 1, 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 18:56:06,433 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:56:06,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:06,440 INFO L82 PathProgramCache]: Analyzing trace with hash 483318420, now seen corresponding path program 1 times [2018-11-07 18:56:06,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:56:06,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:06,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:56:06,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:06,501 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:56:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:56:07,434 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 18:56:07,879 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 18:56:07,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:56:07,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:56:07,883 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:56:07,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:56:07,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:56:07,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:56:07,915 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-07 18:56:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:56:12,392 INFO L93 Difference]: Finished difference Result 1074 states and 1924 transitions. [2018-11-07 18:56:12,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:56:12,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 197 [2018-11-07 18:56:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:56:12,419 INFO L225 Difference]: With dead ends: 1074 [2018-11-07 18:56:12,420 INFO L226 Difference]: Without dead ends: 756 [2018-11-07 18:56:12,427 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:56:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2018-11-07 18:56:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 520. [2018-11-07 18:56:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-11-07 18:56:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 919 transitions. [2018-11-07 18:56:12,522 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 919 transitions. Word has length 197 [2018-11-07 18:56:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:56:12,524 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 919 transitions. [2018-11-07 18:56:12,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:56:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 919 transitions. [2018-11-07 18:56:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-11-07 18:56:12,539 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:56:12,540 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, 1, 1, 1, 1, 1, 1, 1, 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 18:56:12,540 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:56:12,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 873411633, now seen corresponding path program 1 times [2018-11-07 18:56:12,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:56:12,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:12,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:56:12,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:12,543 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:56:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:56:12,875 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 18:56:12,875 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:56:12,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:56:12,875 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:56:12,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:56:12,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:56:12,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:56:12,880 INFO L87 Difference]: Start difference. First operand 520 states and 919 transitions. Second operand 6 states. [2018-11-07 18:56:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:56:16,755 INFO L93 Difference]: Finished difference Result 1482 states and 2700 transitions. [2018-11-07 18:56:16,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:56:16,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 225 [2018-11-07 18:56:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:56:16,777 INFO L225 Difference]: With dead ends: 1482 [2018-11-07 18:56:16,777 INFO L226 Difference]: Without dead ends: 968 [2018-11-07 18:56:16,780 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:56:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2018-11-07 18:56:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 949. [2018-11-07 18:56:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2018-11-07 18:56:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1579 transitions. [2018-11-07 18:56:16,859 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1579 transitions. Word has length 225 [2018-11-07 18:56:16,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:56:16,860 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 1579 transitions. [2018-11-07 18:56:16,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:56:16,860 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1579 transitions. [2018-11-07 18:56:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-11-07 18:56:16,868 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:56:16,868 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, 1, 1, 1, 1, 1, 1, 1, 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 18:56:16,869 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:56:16,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2108795236, now seen corresponding path program 1 times [2018-11-07 18:56:16,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:56:16,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:16,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:56:16,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:16,871 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:56:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:56:17,363 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 9 [2018-11-07 18:56:17,480 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 18:56:17,481 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:56:17,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:56:17,481 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:56:17,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:56:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:56:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:56:17,483 INFO L87 Difference]: Start difference. First operand 949 states and 1579 transitions. Second operand 6 states. [2018-11-07 18:56:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:56:21,251 INFO L93 Difference]: Finished difference Result 2438 states and 4009 transitions. [2018-11-07 18:56:21,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:56:21,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 243 [2018-11-07 18:56:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:56:21,267 INFO L225 Difference]: With dead ends: 2438 [2018-11-07 18:56:21,268 INFO L226 Difference]: Without dead ends: 1495 [2018-11-07 18:56:21,272 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:56:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2018-11-07 18:56:21,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1450. [2018-11-07 18:56:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1450 states. [2018-11-07 18:56:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 2315 transitions. [2018-11-07 18:56:21,347 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 2315 transitions. Word has length 243 [2018-11-07 18:56:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:56:21,350 INFO L480 AbstractCegarLoop]: Abstraction has 1450 states and 2315 transitions. [2018-11-07 18:56:21,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:56:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 2315 transitions. [2018-11-07 18:56:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-11-07 18:56:21,358 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:56:21,359 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:56:21,359 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:56:21,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:21,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1365448965, now seen corresponding path program 1 times [2018-11-07 18:56:21,361 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:56:21,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:21,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:56:21,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:56:21,362 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:56:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:56:21,627 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:56:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:56:21,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:56:21,761 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:56:21,762 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 251 with the following transitions: [2018-11-07 18:56:21,765 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [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], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1037], [1039], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:56:21,837 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:56:21,837 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:56:23,471 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:56:23,472 INFO L272 AbstractInterpreter]: Visited 198 different actions 198 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 18:56:23,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:56:23,519 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:56:25,060 INFO L227 lantSequenceWeakener]: Weakened 239 states. On average, predicates are now at 73.67% of their original sizes. [2018-11-07 18:56:25,060 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:56:26,572 INFO L415 sIntCurrentIteration]: We unified 249 AI predicates to 249 [2018-11-07 18:56:26,572 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:56:26,573 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:56:26,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-11-07 18:56:26,573 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:56:26,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 18:56:26,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 18:56:26,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:56:26,575 INFO L87 Difference]: Start difference. First operand 1450 states and 2315 transitions. Second operand 16 states. [2018-11-07 18:57:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:57:01,156 INFO L93 Difference]: Finished difference Result 3104 states and 4941 transitions. [2018-11-07 18:57:01,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:57:01,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 250 [2018-11-07 18:57:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:57:01,165 INFO L225 Difference]: With dead ends: 3104 [2018-11-07 18:57:01,165 INFO L226 Difference]: Without dead ends: 1660 [2018-11-07 18:57:01,170 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 252 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:57:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2018-11-07 18:57:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1658. [2018-11-07 18:57:01,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2018-11-07 18:57:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2533 transitions. [2018-11-07 18:57:01,219 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2533 transitions. Word has length 250 [2018-11-07 18:57:01,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:57:01,219 INFO L480 AbstractCegarLoop]: Abstraction has 1658 states and 2533 transitions. [2018-11-07 18:57:01,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 18:57:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2533 transitions. [2018-11-07 18:57:01,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-11-07 18:57:01,227 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:57:01,228 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 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 18:57:01,228 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:57:01,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:57:01,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2002626232, now seen corresponding path program 1 times [2018-11-07 18:57:01,229 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:57:01,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:57:01,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:57:01,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:57:01,230 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:57:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:57:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 60 proven. 27 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-07 18:57:01,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:57:01,457 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:57:01,457 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 263 with the following transitions: [2018-11-07 18:57:01,458 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [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], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1037], [1039], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:57:01,468 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:57:01,468 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:57:03,340 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:57:03,340 INFO L272 AbstractInterpreter]: Visited 202 different actions 400 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 18:57:03,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:57:03,348 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:57:05,115 INFO L227 lantSequenceWeakener]: Weakened 99 states. On average, predicates are now at 80.03% of their original sizes. [2018-11-07 18:57:05,115 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:57:07,448 INFO L415 sIntCurrentIteration]: We unified 261 AI predicates to 261 [2018-11-07 18:57:07,449 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:57:07,449 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:57:07,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-07 18:57:07,449 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:57:07,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 18:57:07,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 18:57:07,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-11-07 18:57:07,451 INFO L87 Difference]: Start difference. First operand 1658 states and 2533 transitions. Second operand 22 states. [2018-11-07 18:58:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:58:19,764 INFO L93 Difference]: Finished difference Result 3735 states and 5698 transitions. [2018-11-07 18:58:19,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-07 18:58:19,765 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 262 [2018-11-07 18:58:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:58:19,776 INFO L225 Difference]: With dead ends: 3735 [2018-11-07 18:58:19,776 INFO L226 Difference]: Without dead ends: 2291 [2018-11-07 18:58:19,781 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 270 GetRequests, 225 SyntacticMatches, 16 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2018-11-07 18:58:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2018-11-07 18:58:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2286. [2018-11-07 18:58:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2286 states. [2018-11-07 18:58:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 3206 transitions. [2018-11-07 18:58:19,843 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 3206 transitions. Word has length 262 [2018-11-07 18:58:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:58:19,844 INFO L480 AbstractCegarLoop]: Abstraction has 2286 states and 3206 transitions. [2018-11-07 18:58:19,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 18:58:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 3206 transitions. [2018-11-07 18:58:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-11-07 18:58:19,850 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:58:19,851 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:19,851 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:58:19,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash -380211411, now seen corresponding path program 1 times [2018-11-07 18:58:19,852 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:58:19,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:19,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:19,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:19,853 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:58:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:58:20,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:20,460 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:58:20,460 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 266 with the following transitions: [2018-11-07 18:58:20,461 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [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], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1037], [1039], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:58:20,469 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:58:20,470 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:58:23,647 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:58:23,647 INFO L272 AbstractInterpreter]: Visited 202 different actions 599 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 18:58:23,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:23,656 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:58:23,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:23,656 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 18:58:23,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:23,666 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:58:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:23,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:58:24,247 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:58:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:58:24,325 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:58:24,886 WARN L179 SmtUtils]: Spent 548.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-07 18:58:25,014 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-07 18:58:25,753 WARN L179 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-11-07 18:58:26,215 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 18:58:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:58:27,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:58:27,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:58:27,049 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:58:27,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:58:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:58:27,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:58:27,051 INFO L87 Difference]: Start difference. First operand 2286 states and 3206 transitions. Second operand 7 states. [2018-11-07 18:58:27,967 WARN L179 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 18:58:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:58:32,121 INFO L93 Difference]: Finished difference Result 7514 states and 13701 transitions. [2018-11-07 18:58:32,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:58:32,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 265 [2018-11-07 18:58:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:58:32,167 INFO L225 Difference]: With dead ends: 7514 [2018-11-07 18:58:32,167 INFO L226 Difference]: Without dead ends: 6070 [2018-11-07 18:58:32,190 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 534 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:58:32,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6070 states. [2018-11-07 18:58:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6070 to 5861. [2018-11-07 18:58:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5861 states. [2018-11-07 18:58:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5861 states to 5861 states and 8888 transitions. [2018-11-07 18:58:32,444 INFO L78 Accepts]: Start accepts. Automaton has 5861 states and 8888 transitions. Word has length 265 [2018-11-07 18:58:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:58:32,444 INFO L480 AbstractCegarLoop]: Abstraction has 5861 states and 8888 transitions. [2018-11-07 18:58:32,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:58:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 5861 states and 8888 transitions. [2018-11-07 18:58:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-11-07 18:58:32,463 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:58:32,463 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 18:58:32,464 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:58:32,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:32,464 INFO L82 PathProgramCache]: Analyzing trace with hash 621799793, now seen corresponding path program 1 times [2018-11-07 18:58:32,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:58:32,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:32,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:32,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:32,466 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:58:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:33,123 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 18:58:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 143 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 18:58:33,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:33,299 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:58:33,299 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 325 with the following transitions: [2018-11-07 18:58:33,299 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [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], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1037], [1039], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:58:33,310 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:58:33,311 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:58:38,092 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:58:38,092 INFO L272 AbstractInterpreter]: Visited 203 different actions 605 times. Merged at 7 different actions 20 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 18:58:38,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:38,098 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:58:38,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:38,099 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 18:58:38,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:38,107 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:58:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:38,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:58:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-11-07 18:58:38,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:58:39,167 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-11-07 18:58:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 128 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:58:39,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:58:39,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-11-07 18:58:39,516 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:58:39,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 18:58:39,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 18:58:39,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:58:39,518 INFO L87 Difference]: Start difference. First operand 5861 states and 8888 transitions. Second operand 12 states. [2018-11-07 18:58:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:58:55,727 INFO L93 Difference]: Finished difference Result 31947 states and 57743 transitions. [2018-11-07 18:58:55,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-11-07 18:58:55,728 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 324 [2018-11-07 18:58:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:58:55,899 INFO L225 Difference]: With dead ends: 31947 [2018-11-07 18:58:55,899 INFO L226 Difference]: Without dead ends: 27136 [2018-11-07 18:58:55,992 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 724 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3938 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1594, Invalid=8912, Unknown=0, NotChecked=0, Total=10506 [2018-11-07 18:58:56,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27136 states. [2018-11-07 18:58:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27136 to 26027. [2018-11-07 18:58:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26027 states. [2018-11-07 18:58:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26027 states to 26027 states and 36901 transitions. [2018-11-07 18:58:57,075 INFO L78 Accepts]: Start accepts. Automaton has 26027 states and 36901 transitions. Word has length 324 [2018-11-07 18:58:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:58:57,076 INFO L480 AbstractCegarLoop]: Abstraction has 26027 states and 36901 transitions. [2018-11-07 18:58:57,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 18:58:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 26027 states and 36901 transitions. [2018-11-07 18:58:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-11-07 18:58:57,147 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:58:57,148 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, 1, 1, 1, 1, 1, 1, 1, 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 18:58:57,148 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:58:57,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash -392446574, now seen corresponding path program 1 times [2018-11-07 18:58:57,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:58:57,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:57,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:57,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:57,150 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:58:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:57,787 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 18:58:57,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:58:57,788 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:58:57,788 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 349 with the following transitions: [2018-11-07 18:58:57,789 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], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1037], [1039], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:58:57,794 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:58:57,794 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:59:02,034 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:59:02,034 INFO L272 AbstractInterpreter]: Visited 206 different actions 825 times. Merged at 9 different actions 40 times. Never widened. Found 9 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 18:59:02,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:02,039 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:59:02,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:02,039 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 18:59:02,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:02,050 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:59:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:02,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:59:03,151 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 18:59:03,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:59:03,586 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 18:59:03,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:59:03,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-11-07 18:59:03,608 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:59:03,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:59:03,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:59:03,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:59:03,609 INFO L87 Difference]: Start difference. First operand 26027 states and 36901 transitions. Second operand 8 states. [2018-11-07 18:59:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:59:09,855 INFO L93 Difference]: Finished difference Result 71172 states and 113300 transitions. [2018-11-07 18:59:09,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 18:59:09,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 348 [2018-11-07 18:59:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:59:10,129 INFO L225 Difference]: With dead ends: 71172 [2018-11-07 18:59:10,129 INFO L226 Difference]: Without dead ends: 47215 [2018-11-07 18:59:10,241 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 715 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=249, Invalid=1011, Unknown=0, NotChecked=0, Total=1260 [2018-11-07 18:59:10,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47215 states. [2018-11-07 18:59:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47215 to 45334. [2018-11-07 18:59:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45334 states. [2018-11-07 18:59:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45334 states to 45334 states and 60066 transitions. [2018-11-07 18:59:11,945 INFO L78 Accepts]: Start accepts. Automaton has 45334 states and 60066 transitions. Word has length 348 [2018-11-07 18:59:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:59:11,945 INFO L480 AbstractCegarLoop]: Abstraction has 45334 states and 60066 transitions. [2018-11-07 18:59:11,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 18:59:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 45334 states and 60066 transitions. [2018-11-07 18:59:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-11-07 18:59:12,027 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:59:12,027 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:59:12,027 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:59:12,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:12,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1841100441, now seen corresponding path program 1 times [2018-11-07 18:59:12,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:59:12,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:12,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:12,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:12,030 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:12,664 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:59:12,925 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:59:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 177 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:59:13,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:13,124 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:59:13,124 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 347 with the following transitions: [2018-11-07 18:59:13,124 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], [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], [491], [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], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1037], [1039], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:59:13,129 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:59:13,129 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:59:14,968 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:59:14,968 INFO L272 AbstractInterpreter]: Visited 201 different actions 395 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 18:59:15,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:15,005 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:59:17,142 INFO L227 lantSequenceWeakener]: Weakened 343 states. On average, predicates are now at 72.52% of their original sizes. [2018-11-07 18:59:17,142 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:59:17,436 INFO L415 sIntCurrentIteration]: We unified 345 AI predicates to 345 [2018-11-07 18:59:17,436 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:59:17,436 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:59:17,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [7] total 23 [2018-11-07 18:59:17,437 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:59:17,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:59:17,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:59:17,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:59:17,438 INFO L87 Difference]: Start difference. First operand 45334 states and 60066 transitions. Second operand 18 states. Received shutdown request... [2018-11-07 18:59:40,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:59:40,382 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:59:40,387 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:59:40,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:59:40 BoogieIcfgContainer [2018-11-07 18:59:40,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:59:40,388 INFO L168 Benchmark]: Toolchain (without parser) took 220725.23 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 25.3 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-11-07 18:59:40,389 INFO L168 Benchmark]: CDTParser took 0.19 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 18:59:40,390 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1135.43 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-11-07 18:59:40,390 INFO L168 Benchmark]: Boogie Procedure Inliner took 213.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 770.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -915.4 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-11-07 18:59:40,391 INFO L168 Benchmark]: Boogie Preprocessor took 157.57 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 18:59:40,392 INFO L168 Benchmark]: RCFGBuilder took 5106.14 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 268.8 MB). Peak memory consumption was 268.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:59:40,393 INFO L168 Benchmark]: TraceAbstraction took 214105.37 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.4 GB in the end (delta: 576.8 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-11-07 18:59:40,398 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 1135.43 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 213.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 770.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -915.4 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.57 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 5106.14 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 268.8 MB). Peak memory consumption was 268.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214105.37 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.4 GB in the end (delta: 576.8 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1605]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1605). Cancelled while BasicCegarLoop was constructing difference of abstraction (45334states) and FLOYD_HOARE automaton (currently 14 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (1217 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 214.0s OverallTime, 9 OverallIterations, 5 TraceHistogramMax, 170.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1719 SDtfs, 15839 SDslu, 3582 SDs, 0 SdLazy, 28446 SolverSat, 6090 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 103.4s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 3030 GetRequests, 2769 SyntacticMatches, 24 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 11.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45334occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 17.7s AbstIntTime, 6 AbstIntIterations, 3 AbstIntStrong, 0.9992097181120746 AbsIntWeakeningRatio, 0.2409356725146199 AbsIntAvgWeakeningVarsNumRemoved, 55.8093567251462 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 3506 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 3397 NumberOfCodeBlocks, 3397 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 4319 ConstructedInterpolants, 0 QuantifiedInterpolants, 3908495 SizeOfPredicates, 20 NumberOfNonLiveVariables, 3866 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 1737/1934 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown