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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label08_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 08:47:18,738 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 08:47:18,740 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 08:47:18,753 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 08:47:18,753 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 08:47:18,754 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 08:47:18,757 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 08:47:18,760 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 08:47:18,763 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 08:47:18,763 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 08:47:18,764 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 08:47:18,765 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 08:47:18,766 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 08:47:18,767 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 08:47:18,768 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 08:47:18,769 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 08:47:18,770 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 08:47:18,771 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 08:47:18,773 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 08:47:18,775 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 08:47:18,776 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 08:47:18,778 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 08:47:18,780 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 08:47:18,781 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 08:47:18,781 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 08:47:18,782 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 08:47:18,783 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 08:47:18,784 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 08:47:18,785 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 08:47:18,786 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 08:47:18,786 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 08:47:18,787 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 08:47:18,787 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 08:47:18,787 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 08:47:18,788 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 08:47:18,789 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 08:47:18,789 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 08:47:18,807 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 08:47:18,808 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 08:47:18,809 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 08:47:18,809 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 08:47:18,809 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 08:47:18,809 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 08:47:18,809 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 08:47:18,810 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 08:47:18,810 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 08:47:18,811 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 08:47:18,811 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 08:47:18,811 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 08:47:18,811 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 08:47:18,811 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 08:47:18,812 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 08:47:18,812 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 08:47:18,812 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 08:47:18,814 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 08:47:18,814 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 08:47:18,814 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 08:47:18,814 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 08:47:18,815 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 08:47:18,815 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 08:47:18,815 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 08:47:18,815 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 08:47:18,816 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 08:47:18,816 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:47:18,816 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 08:47:18,816 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 08:47:18,816 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 08:47:18,817 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 08:47:18,817 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 08:47:18,817 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 08:47:18,817 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 08:47:18,818 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 08:47:18,818 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 08:47:18,862 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 08:47:18,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 08:47:18,882 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 08:47:18,884 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 08:47:18,885 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 08:47:18,885 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label08_true-unreach-call.c [2018-11-07 08:47:18,959 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e3369c2/c6758c530b9543a8a2f7d35f38680b2a/FLAGe55f83971 [2018-11-07 08:47:19,733 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 08:47:19,734 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label08_true-unreach-call.c [2018-11-07 08:47:19,768 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e3369c2/c6758c530b9543a8a2f7d35f38680b2a/FLAGe55f83971 [2018-11-07 08:47:19,787 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e3369c2/c6758c530b9543a8a2f7d35f38680b2a [2018-11-07 08:47:19,800 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 08:47:19,802 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 08:47:19,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 08:47:19,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 08:47:19,808 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 08:47:19,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:47:19" (1/1) ... [2018-11-07 08:47:19,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@327ccbfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:19, skipping insertion in model container [2018-11-07 08:47:19,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:47:19" (1/1) ... [2018-11-07 08:47:19,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 08:47:20,004 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 08:47:21,508 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:47:21,514 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 08:47:22,376 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:47:22,411 INFO L193 MainTranslator]: Completed translation [2018-11-07 08:47:22,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22 WrapperNode [2018-11-07 08:47:22,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 08:47:22,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 08:47:22,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 08:47:22,414 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 08:47:22,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (1/1) ... [2018-11-07 08:47:22,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (1/1) ... [2018-11-07 08:47:22,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 08:47:22,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 08:47:22,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 08:47:22,818 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 08:47:22,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (1/1) ... [2018-11-07 08:47:22,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (1/1) ... [2018-11-07 08:47:22,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (1/1) ... [2018-11-07 08:47:22,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (1/1) ... [2018-11-07 08:47:22,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (1/1) ... [2018-11-07 08:47:23,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (1/1) ... [2018-11-07 08:47:23,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (1/1) ... [2018-11-07 08:47:23,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 08:47:23,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 08:47:23,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 08:47:23,120 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 08:47:23,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (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 08:47:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 08:47:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 08:47:23,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 08:47:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-07 08:47:23,195 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-07 08:47:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 08:47:23,196 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 08:47:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 08:47:23,196 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 08:47:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 08:47:23,197 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 08:47:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 08:47:23,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 08:47:23,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 08:47:23,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 08:47:35,364 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 08:47:35,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:47:35 BoogieIcfgContainer [2018-11-07 08:47:35,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 08:47:35,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 08:47:35,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 08:47:35,370 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 08:47:35,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:47:19" (1/3) ... [2018-11-07 08:47:35,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a43e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:47:35, skipping insertion in model container [2018-11-07 08:47:35,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:47:22" (2/3) ... [2018-11-07 08:47:35,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a43e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:47:35, skipping insertion in model container [2018-11-07 08:47:35,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:47:35" (3/3) ... [2018-11-07 08:47:35,374 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label08_true-unreach-call.c [2018-11-07 08:47:35,384 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 08:47:35,394 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 08:47:35,409 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 08:47:35,467 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 08:47:35,468 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 08:47:35,468 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 08:47:35,468 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 08:47:35,468 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 08:47:35,468 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 08:47:35,468 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 08:47:35,469 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 08:47:35,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-11-07 08:47:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-07 08:47:35,530 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:47:35,531 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] [2018-11-07 08:47:35,533 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:47:35,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:47:35,540 INFO L82 PathProgramCache]: Analyzing trace with hash 332151899, now seen corresponding path program 1 times [2018-11-07 08:47:35,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:47:35,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:47:35,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:47:35,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:47:35,596 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:47:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:47:36,061 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 08:47:36,192 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 08:47:36,195 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:47:36,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 08:47:36,195 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:47:36,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 08:47:36,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 08:47:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 08:47:36,231 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 3 states. [2018-11-07 08:47:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:47:44,399 INFO L93 Difference]: Finished difference Result 3097 states and 5707 transitions. [2018-11-07 08:47:44,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 08:47:44,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2018-11-07 08:47:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:47:44,435 INFO L225 Difference]: With dead ends: 3097 [2018-11-07 08:47:44,435 INFO L226 Difference]: Without dead ends: 1975 [2018-11-07 08:47:44,448 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 08:47:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2018-11-07 08:47:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1974. [2018-11-07 08:47:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1974 states. [2018-11-07 08:47:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 3284 transitions. [2018-11-07 08:47:44,619 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 3284 transitions. Word has length 57 [2018-11-07 08:47:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:47:44,620 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 3284 transitions. [2018-11-07 08:47:44,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 08:47:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 3284 transitions. [2018-11-07 08:47:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-07 08:47:44,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:47:44,629 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, 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] [2018-11-07 08:47:44,629 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:47:44,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:47:44,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1140174250, now seen corresponding path program 1 times [2018-11-07 08:47:44,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:47:44,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:47:44,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:47:44,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:47:44,631 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:47:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:47:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:47:44,914 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:47:44,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 08:47:44,914 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:47:44,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 08:47:44,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 08:47:44,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 08:47:44,917 INFO L87 Difference]: Start difference. First operand 1974 states and 3284 transitions. Second operand 5 states. [2018-11-07 08:47:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:47:58,628 INFO L93 Difference]: Finished difference Result 5733 states and 9688 transitions. [2018-11-07 08:47:58,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 08:47:58,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2018-11-07 08:47:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:47:58,662 INFO L225 Difference]: With dead ends: 5733 [2018-11-07 08:47:58,662 INFO L226 Difference]: Without dead ends: 3765 [2018-11-07 08:47:58,670 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 08:47:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3765 states. [2018-11-07 08:47:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3765 to 3682. [2018-11-07 08:47:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3682 states. [2018-11-07 08:47:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 5656 transitions. [2018-11-07 08:47:58,803 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 5656 transitions. Word has length 133 [2018-11-07 08:47:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:47:58,804 INFO L480 AbstractCegarLoop]: Abstraction has 3682 states and 5656 transitions. [2018-11-07 08:47:58,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 08:47:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 5656 transitions. [2018-11-07 08:47:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-07 08:47:58,817 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:47:58,817 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, 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] [2018-11-07 08:47:58,817 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:47:58,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:47:58,818 INFO L82 PathProgramCache]: Analyzing trace with hash -508893690, now seen corresponding path program 1 times [2018-11-07 08:47:58,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:47:58,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:47:58,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:47:58,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:47:58,820 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:47:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:47:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:47:59,209 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:47:59,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 08:47:59,210 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:47:59,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 08:47:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 08:47:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 08:47:59,211 INFO L87 Difference]: Start difference. First operand 3682 states and 5656 transitions. Second operand 5 states. [2018-11-07 08:48:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:48:16,262 INFO L93 Difference]: Finished difference Result 13651 states and 21729 transitions. [2018-11-07 08:48:16,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 08:48:16,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2018-11-07 08:48:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:48:16,326 INFO L225 Difference]: With dead ends: 13651 [2018-11-07 08:48:16,327 INFO L226 Difference]: Without dead ends: 9975 [2018-11-07 08:48:16,355 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 08:48:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9975 states. [2018-11-07 08:48:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9975 to 9786. [2018-11-07 08:48:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9786 states. [2018-11-07 08:48:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9786 states to 9786 states and 14482 transitions. [2018-11-07 08:48:16,658 INFO L78 Accepts]: Start accepts. Automaton has 9786 states and 14482 transitions. Word has length 147 [2018-11-07 08:48:16,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:48:16,659 INFO L480 AbstractCegarLoop]: Abstraction has 9786 states and 14482 transitions. [2018-11-07 08:48:16,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 08:48:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 9786 states and 14482 transitions. [2018-11-07 08:48:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-07 08:48:16,667 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:48:16,667 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, 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] [2018-11-07 08:48:16,667 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:48:16,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:48:16,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1684270358, now seen corresponding path program 1 times [2018-11-07 08:48:16,668 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:48:16,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:48:16,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:48:16,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:48:16,672 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:48:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:48:17,021 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 08:48:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:48:17,192 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:48:17,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 08:48:17,193 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:48:17,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:48:17,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:48:17,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:48:17,194 INFO L87 Difference]: Start difference. First operand 9786 states and 14482 transitions. Second operand 6 states. [2018-11-07 08:48:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:48:29,093 INFO L93 Difference]: Finished difference Result 34080 states and 53551 transitions. [2018-11-07 08:48:29,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 08:48:29,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2018-11-07 08:48:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:48:29,213 INFO L225 Difference]: With dead ends: 34080 [2018-11-07 08:48:29,214 INFO L226 Difference]: Without dead ends: 24300 [2018-11-07 08:48:29,286 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 08:48:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24300 states. [2018-11-07 08:48:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24300 to 24077. [2018-11-07 08:48:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24077 states. [2018-11-07 08:48:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24077 states to 24077 states and 33897 transitions. [2018-11-07 08:48:29,916 INFO L78 Accepts]: Start accepts. Automaton has 24077 states and 33897 transitions. Word has length 165 [2018-11-07 08:48:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:48:29,917 INFO L480 AbstractCegarLoop]: Abstraction has 24077 states and 33897 transitions. [2018-11-07 08:48:29,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:48:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 24077 states and 33897 transitions. [2018-11-07 08:48:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-07 08:48:29,932 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:48:29,932 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:48:29,933 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:48:29,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:48:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash -784675644, now seen corresponding path program 1 times [2018-11-07 08:48:29,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:48:29,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:48:29,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:48:29,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:48:29,935 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:48:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:48:30,232 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 08:48:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 100 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 08:48:30,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:48:30,641 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:48:30,643 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2018-11-07 08:48:30,650 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2971], [2979], [2983], [2985], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3140], [3143], [3147], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3273], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-11-07 08:48:30,711 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:48:30,712 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:48:31,276 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:48:31,280 INFO L272 AbstractInterpreter]: Visited 108 different actions 108 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 08:48:31,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:48:31,324 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:48:31,778 INFO L227 lantSequenceWeakener]: Weakened 226 states. On average, predicates are now at 71.44% of their original sizes. [2018-11-07 08:48:31,779 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:48:32,001 INFO L415 sIntCurrentIteration]: We unified 236 AI predicates to 236 [2018-11-07 08:48:32,002 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:48:32,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:48:32,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-11-07 08:48:32,003 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:48:32,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:48:32,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:48:32,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:48:32,004 INFO L87 Difference]: Start difference. First operand 24077 states and 33897 transitions. Second operand 6 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown