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/Problem13_label42_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 18:59:02,669 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 18:59:02,671 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 18:59:02,682 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 18:59:02,682 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 18:59:02,684 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 18:59:02,685 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 18:59:02,687 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 18:59:02,689 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 18:59:02,690 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 18:59:02,691 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 18:59:02,691 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 18:59:02,692 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 18:59:02,693 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 18:59:02,694 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 18:59:02,695 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 18:59:02,696 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 18:59:02,698 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 18:59:02,700 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 18:59:02,701 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 18:59:02,703 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 18:59:02,704 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 18:59:02,706 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 18:59:02,707 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 18:59:02,707 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 18:59:02,708 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 18:59:02,709 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 18:59:02,710 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 18:59:02,711 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 18:59:02,712 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 18:59:02,712 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 18:59:02,713 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 18:59:02,713 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 18:59:02,713 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 18:59:02,715 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 18:59:02,715 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 18:59:02,716 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 [2018-11-12 18:59:02,732 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 18:59:02,732 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 18:59:02,733 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 18:59:02,733 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 18:59:02,733 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 18:59:02,733 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 18:59:02,734 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 18:59:02,734 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 18:59:02,734 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 18:59:02,734 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 18:59:02,734 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 18:59:02,735 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 18:59:02,735 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 18:59:02,735 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 18:59:02,736 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 18:59:02,736 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 18:59:02,736 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 18:59:02,736 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 18:59:02,736 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 18:59:02,737 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 18:59:02,737 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 18:59:02,737 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 18:59:02,737 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 18:59:02,737 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 18:59:02,738 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 18:59:02,738 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:59:02,738 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 18:59:02,738 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 18:59:02,738 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 18:59:02,739 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 18:59:02,739 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 18:59:02,739 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 18:59:02,739 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 18:59:02,739 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 18:59:02,739 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 18:59:02,798 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 18:59:02,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 18:59:02,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 18:59:02,817 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 18:59:02,817 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 18:59:02,818 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label42_true-unreach-call.c [2018-11-12 18:59:02,881 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a00157f34/5531a1d55e704831b625019bd2a014d7/FLAG3e96241e4 [2018-11-12 18:59:03,684 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 18:59:03,685 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label42_true-unreach-call.c [2018-11-12 18:59:03,729 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a00157f34/5531a1d55e704831b625019bd2a014d7/FLAG3e96241e4 [2018-11-12 18:59:03,751 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a00157f34/5531a1d55e704831b625019bd2a014d7 [2018-11-12 18:59:03,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 18:59:03,767 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 18:59:03,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 18:59:03,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 18:59:03,775 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 18:59:03,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:59:03" (1/1) ... [2018-11-12 18:59:03,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1cbd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:03, skipping insertion in model container [2018-11-12 18:59:03,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:59:03" (1/1) ... [2018-11-12 18:59:03,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 18:59:03,978 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 18:59:05,538 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:59:05,543 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 18:59:06,292 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:59:06,326 INFO L193 MainTranslator]: Completed translation [2018-11-12 18:59:06,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06 WrapperNode [2018-11-12 18:59:06,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 18:59:06,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 18:59:06,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 18:59:06,328 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 18:59:06,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (1/1) ... [2018-11-12 18:59:06,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (1/1) ... [2018-11-12 18:59:06,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 18:59:06,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 18:59:06,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 18:59:06,695 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 18:59:06,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (1/1) ... [2018-11-12 18:59:06,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (1/1) ... [2018-11-12 18:59:06,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (1/1) ... [2018-11-12 18:59:06,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (1/1) ... [2018-11-12 18:59:06,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (1/1) ... [2018-11-12 18:59:06,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (1/1) ... [2018-11-12 18:59:06,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (1/1) ... [2018-11-12 18:59:06,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 18:59:06,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 18:59:06,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 18:59:06,983 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 18:59:06,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (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 [2018-11-12 18:59:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 18:59:07,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 18:59:07,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 18:59:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-12 18:59:07,053 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-12 18:59:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-12 18:59:07,053 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-12 18:59:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-12 18:59:07,054 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-12 18:59:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 18:59:07,054 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 18:59:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 18:59:07,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 18:59:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 18:59:07,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 18:59:18,675 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 18:59:18,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:59:18 BoogieIcfgContainer [2018-11-12 18:59:18,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 18:59:18,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 18:59:18,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 18:59:18,680 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 18:59:18,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 06:59:03" (1/3) ... [2018-11-12 18:59:18,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bce7fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:59:18, skipping insertion in model container [2018-11-12 18:59:18,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:59:06" (2/3) ... [2018-11-12 18:59:18,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bce7fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:59:18, skipping insertion in model container [2018-11-12 18:59:18,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:59:18" (3/3) ... [2018-11-12 18:59:18,684 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label42_true-unreach-call.c [2018-11-12 18:59:18,694 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 18:59:18,704 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 18:59:18,721 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 18:59:18,768 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 18:59:18,768 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 18:59:18,769 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 18:59:18,769 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 18:59:18,769 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 18:59:18,769 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 18:59:18,769 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 18:59:18,769 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 18:59:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-11-12 18:59:18,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-12 18:59:18,824 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:59:18,825 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] [2018-11-12 18:59:18,828 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:59:18,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:59:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1770921932, now seen corresponding path program 1 times [2018-11-12 18:59:18,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:59:18,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:59:18,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:59:18,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:59:18,893 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:59:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:59:19,435 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-12 18:59:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:59:19,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:59:19,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:59:19,494 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:59:19,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:59:19,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:59:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:59:19,520 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 4 states. [2018-11-12 18:59:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:59:33,528 INFO L93 Difference]: Finished difference Result 4105 states and 7669 transitions. [2018-11-12 18:59:33,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:59:33,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2018-11-12 18:59:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:59:33,587 INFO L225 Difference]: With dead ends: 4105 [2018-11-12 18:59:33,587 INFO L226 Difference]: Without dead ends: 2979 [2018-11-12 18:59:33,601 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:59:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2018-11-12 18:59:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2849. [2018-11-12 18:59:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2849 states. [2018-11-12 18:59:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 5075 transitions. [2018-11-12 18:59:33,813 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 5075 transitions. Word has length 72 [2018-11-12 18:59:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:59:33,814 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 5075 transitions. [2018-11-12 18:59:33,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:59:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 5075 transitions. [2018-11-12 18:59:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-12 18:59:33,833 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:59:33,834 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:59:33,834 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:59:33,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:59:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash -646362735, now seen corresponding path program 1 times [2018-11-12 18:59:33,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:59:33,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:59:33,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:59:33,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:59:33,841 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:59:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:59:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:59:34,115 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:59:34,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 18:59:34,115 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:59:34,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 18:59:34,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 18:59:34,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 18:59:34,119 INFO L87 Difference]: Start difference. First operand 2849 states and 5075 transitions. Second operand 6 states. [2018-11-12 18:59:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:59:46,183 INFO L93 Difference]: Finished difference Result 8249 states and 15059 transitions. [2018-11-12 18:59:46,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:59:46,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2018-11-12 18:59:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:59:46,225 INFO L225 Difference]: With dead ends: 8249 [2018-11-12 18:59:46,226 INFO L226 Difference]: Without dead ends: 5406 [2018-11-12 18:59:46,239 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 [2018-11-12 18:59:46,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5406 states. [2018-11-12 18:59:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5406 to 5361. [2018-11-12 18:59:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5361 states. [2018-11-12 18:59:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5361 states to 5361 states and 8751 transitions. [2018-11-12 18:59:46,425 INFO L78 Accepts]: Start accepts. Automaton has 5361 states and 8751 transitions. Word has length 143 [2018-11-12 18:59:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:59:46,425 INFO L480 AbstractCegarLoop]: Abstraction has 5361 states and 8751 transitions. [2018-11-12 18:59:46,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 18:59:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 5361 states and 8751 transitions. [2018-11-12 18:59:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-11-12 18:59:46,433 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:59:46,433 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, 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] [2018-11-12 18:59:46,433 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:59:46,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:59:46,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1327608448, now seen corresponding path program 1 times [2018-11-12 18:59:46,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:59:46,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:59:46,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:59:46,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:59:46,437 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:59:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:59:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:59:46,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:59:46,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 18:59:46,717 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:59:46,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 18:59:46,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 18:59:46,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 18:59:46,719 INFO L87 Difference]: Start difference. First operand 5361 states and 8751 transitions. Second operand 6 states. [2018-11-12 18:59:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:59:56,609 INFO L93 Difference]: Finished difference Result 18313 states and 30872 transitions. [2018-11-12 18:59:56,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:59:56,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2018-11-12 18:59:56,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:59:56,697 INFO L225 Difference]: With dead ends: 18313 [2018-11-12 18:59:56,697 INFO L226 Difference]: Without dead ends: 12958 [2018-11-12 18:59:56,742 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 [2018-11-12 18:59:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12958 states. [2018-11-12 18:59:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12958 to 12892. [2018-11-12 18:59:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12892 states. [2018-11-12 18:59:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12892 states to 12892 states and 19346 transitions. [2018-11-12 18:59:57,282 INFO L78 Accepts]: Start accepts. Automaton has 12892 states and 19346 transitions. Word has length 146 [2018-11-12 18:59:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:59:57,283 INFO L480 AbstractCegarLoop]: Abstraction has 12892 states and 19346 transitions. [2018-11-12 18:59:57,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 18:59:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 12892 states and 19346 transitions. [2018-11-12 18:59:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-11-12 18:59:57,298 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:59:57,298 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:59:57,298 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:59:57,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:59:57,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2095905532, now seen corresponding path program 1 times [2018-11-12 18:59:57,299 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:59:57,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:59:57,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:59:57,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:59:57,301 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:59:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:59:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 130 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 18:59:57,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:59:57,527 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:59:57,528 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 228 with the following transitions: [2018-11-12 18:59:57,530 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], [2987], [2995], [3003], [3011], [3019], [3027], [3035], [3043], [3051], [3059], [3067], [3075], [3083], [3091], [3099], [3103], [3105], [3108], [3116], [3121], [3125], [3128], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3171], [3176], [3178], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-11-12 18:59:57,580 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:59:57,580 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:59:58,318 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:59:58,320 INFO L272 AbstractInterpreter]: Visited 86 different actions 86 times. Never merged. Never widened. Performed 1674 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1674 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Never found a fixpoint. Largest state had 26 variables. [2018-11-12 18:59:58,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:59:58,358 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:59:59,176 INFO L227 lantSequenceWeakener]: Weakened 203 states. On average, predicates are now at 72.05% of their original sizes. [2018-11-12 18:59:59,176 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:59:59,901 INFO L415 sIntCurrentIteration]: We unified 226 AI predicates to 226 [2018-11-12 18:59:59,902 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:59:59,903 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:59:59,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2018-11-12 18:59:59,903 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:59:59,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 18:59:59,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 18:59:59,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:59:59,905 INFO L87 Difference]: Start difference. First operand 12892 states and 19346 transitions. Second operand 10 states. [2018-11-12 19:00:12,322 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:01:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:01:00,169 INFO L93 Difference]: Finished difference Result 26587 states and 39708 transitions. [2018-11-12 19:01:00,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-12 19:01:00,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 227 [2018-11-12 19:01:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:01:00,220 INFO L225 Difference]: With dead ends: 26587 [2018-11-12 19:01:00,220 INFO L226 Difference]: Without dead ends: 13701 [2018-11-12 19:01:00,261 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 230 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-12 19:01:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13701 states. [2018-11-12 19:01:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13701 to 13696. [2018-11-12 19:01:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13696 states. [2018-11-12 19:01:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13696 states to 13696 states and 20161 transitions. [2018-11-12 19:01:00,576 INFO L78 Accepts]: Start accepts. Automaton has 13696 states and 20161 transitions. Word has length 227 [2018-11-12 19:01:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:01:00,577 INFO L480 AbstractCegarLoop]: Abstraction has 13696 states and 20161 transitions. [2018-11-12 19:01:00,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 19:01:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 13696 states and 20161 transitions. [2018-11-12 19:01:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-11-12 19:01:00,597 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:01:00,598 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:01:00,598 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:01:00,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:01:00,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2012380520, now seen corresponding path program 1 times [2018-11-12 19:01:00,599 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:01:00,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:01:00,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:01:00,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:01:00,600 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:01:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:01:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 201 proven. 145 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-11-12 19:01:12,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:01:12,101 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:01:12,102 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 329 with the following transitions: [2018-11-12 19:01:12,102 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], [2987], [2995], [3003], [3011], [3019], [3027], [3035], [3043], [3051], [3059], [3067], [3075], [3083], [3091], [3099], [3103], [3105], [3108], [3116], [3121], [3125], [3128], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3171], [3176], [3178], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3265], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-11-12 19:01:12,108 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:01:12,108 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:01:12,825 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:01:12,825 INFO L272 AbstractInterpreter]: Visited 110 different actions 317 times. Merged at 5 different actions 9 times. Never widened. Performed 5577 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5577 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 19:01:12,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:01:12,863 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:01:13,649 INFO L227 lantSequenceWeakener]: Weakened 74 states. On average, predicates are now at 71.9% of their original sizes. [2018-11-12 19:01:13,649 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:01:16,440 INFO L415 sIntCurrentIteration]: We unified 327 AI predicates to 327 [2018-11-12 19:01:16,441 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:01:16,441 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:01:16,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [5] total 16 [2018-11-12 19:01:16,441 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:01:16,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-12 19:01:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-12 19:01:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-12 19:01:16,443 INFO L87 Difference]: Start difference. First operand 13696 states and 20161 transitions. Second operand 13 states. [2018-11-12 19:01:24,499 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:02:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:02:24,315 INFO L93 Difference]: Finished difference Result 27975 states and 41291 transitions. [2018-11-12 19:02:24,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-12 19:02:24,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 328 [2018-11-12 19:02:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:02:24,383 INFO L225 Difference]: With dead ends: 27975 [2018-11-12 19:02:24,384 INFO L226 Difference]: Without dead ends: 15089 [2018-11-12 19:02:24,434 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 333 GetRequests, 264 SyntacticMatches, 52 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2018-11-12 19:02:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15089 states. [2018-11-12 19:02:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15089 to 14503. [2018-11-12 19:02:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14503 states. [2018-11-12 19:02:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14503 states to 14503 states and 21006 transitions. [2018-11-12 19:02:24,779 INFO L78 Accepts]: Start accepts. Automaton has 14503 states and 21006 transitions. Word has length 328 [2018-11-12 19:02:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:02:24,780 INFO L480 AbstractCegarLoop]: Abstraction has 14503 states and 21006 transitions. [2018-11-12 19:02:24,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-12 19:02:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 14503 states and 21006 transitions. [2018-11-12 19:02:24,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-11-12 19:02:24,798 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:02:24,798 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:02:24,798 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:02:24,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:24,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1887435223, now seen corresponding path program 1 times [2018-11-12 19:02:24,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:02:24,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:24,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:02:24,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:24,800 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:02:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:02:25,296 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 19:02:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 131 proven. 119 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-12 19:02:25,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:02:25,839 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:02:25,839 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 344 with the following transitions: [2018-11-12 19:02:25,840 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], [2987], [2995], [3003], [3011], [3019], [3027], [3035], [3043], [3051], [3059], [3067], [3075], [3083], [3091], [3099], [3103], [3105], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [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], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3366], [3370], [3374], [3378], [3382], [3386], [3390], [3394], [3398], [3402], [3406], [3409], [3410], [3414], [3425], [3429], [3440], [3451], [3455], [3459], [3463], [3467], [3471], [3474], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-11-12 19:02:25,845 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:02:25,846 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:02:26,355 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:02:26,355 INFO L272 AbstractInterpreter]: Visited 149 different actions 434 times. Merged at 5 different actions 9 times. Never widened. Performed 7660 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7660 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 19:02:26,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:26,365 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates