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/Problem17_label29_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 19:32:26,703 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 19:32:26,706 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 19:32:26,723 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 19:32:26,723 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 19:32:26,724 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 19:32:26,726 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 19:32:26,728 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 19:32:26,730 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 19:32:26,732 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 19:32:26,733 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 19:32:26,733 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 19:32:26,736 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 19:32:26,737 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 19:32:26,739 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 19:32:26,739 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 19:32:26,740 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 19:32:26,742 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 19:32:26,744 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 19:32:26,746 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 19:32:26,747 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 19:32:26,748 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 19:32:26,751 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 19:32:26,751 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 19:32:26,751 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 19:32:26,752 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 19:32:26,753 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 19:32:26,754 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 19:32:26,755 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 19:32:26,756 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 19:32:26,757 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 19:32:26,757 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 19:32:26,758 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 19:32:26,758 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 19:32:26,759 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 19:32:26,760 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 19:32:26,760 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 19:32:26,775 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 19:32:26,776 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 19:32:26,777 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 19:32:26,777 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 19:32:26,777 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 19:32:26,777 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 19:32:26,777 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 19:32:26,778 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 19:32:26,778 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 19:32:26,778 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 19:32:26,778 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 19:32:26,778 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 19:32:26,779 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 19:32:26,780 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 19:32:26,780 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 19:32:26,780 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 19:32:26,780 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 19:32:26,780 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 19:32:26,781 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 19:32:26,781 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 19:32:26,781 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 19:32:26,781 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 19:32:26,781 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 19:32:26,782 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 19:32:26,782 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 19:32:26,782 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:32:26,782 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 19:32:26,782 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 19:32:26,783 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 19:32:26,783 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 19:32:26,783 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 19:32:26,783 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 19:32:26,784 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 19:32:26,784 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 19:32:26,784 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 19:32:26,835 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 19:32:26,852 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 19:32:26,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 19:32:26,859 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 19:32:26,860 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 19:32:26,861 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label29_true-unreach-call.c [2018-11-12 19:32:26,926 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f770f7f04/1ec2ddcc668a4ee3bf43768be63db24b/FLAG778b30f31 [2018-11-12 19:32:27,698 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 19:32:27,699 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label29_true-unreach-call.c [2018-11-12 19:32:27,722 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f770f7f04/1ec2ddcc668a4ee3bf43768be63db24b/FLAG778b30f31 [2018-11-12 19:32:27,738 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f770f7f04/1ec2ddcc668a4ee3bf43768be63db24b [2018-11-12 19:32:27,750 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 19:32:27,751 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 19:32:27,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 19:32:27,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 19:32:27,757 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 19:32:27,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:32:27" (1/1) ... [2018-11-12 19:32:27,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51448601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:27, skipping insertion in model container [2018-11-12 19:32:27,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:32:27" (1/1) ... [2018-11-12 19:32:27,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 19:32:27,879 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 19:32:28,814 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:32:28,821 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 19:32:29,284 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:32:29,311 INFO L193 MainTranslator]: Completed translation [2018-11-12 19:32:29,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29 WrapperNode [2018-11-12 19:32:29,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 19:32:29,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 19:32:29,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 19:32:29,313 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 19:32:29,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (1/1) ... [2018-11-12 19:32:29,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (1/1) ... [2018-11-12 19:32:29,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 19:32:29,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 19:32:29,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 19:32:29,584 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 19:32:29,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (1/1) ... [2018-11-12 19:32:29,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (1/1) ... [2018-11-12 19:32:29,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (1/1) ... [2018-11-12 19:32:29,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (1/1) ... [2018-11-12 19:32:29,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (1/1) ... [2018-11-12 19:32:29,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (1/1) ... [2018-11-12 19:32:29,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (1/1) ... [2018-11-12 19:32:29,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 19:32:29,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 19:32:29,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 19:32:29,817 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 19:32:29,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (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 19:32:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 19:32:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 19:32:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 19:32:29,888 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-12 19:32:29,889 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-12 19:32:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 19:32:29,890 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 19:32:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 19:32:29,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 19:32:29,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 19:32:29,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 19:32:38,941 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 19:32:38,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:32:38 BoogieIcfgContainer [2018-11-12 19:32:38,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 19:32:38,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 19:32:38,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 19:32:38,947 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 19:32:38,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:32:27" (1/3) ... [2018-11-12 19:32:38,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7adf9b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:32:38, skipping insertion in model container [2018-11-12 19:32:38,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:32:29" (2/3) ... [2018-11-12 19:32:38,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7adf9b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:32:38, skipping insertion in model container [2018-11-12 19:32:38,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:32:38" (3/3) ... [2018-11-12 19:32:38,951 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label29_true-unreach-call.c [2018-11-12 19:32:38,961 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 19:32:38,970 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 19:32:38,989 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 19:32:39,035 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 19:32:39,036 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 19:32:39,036 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 19:32:39,036 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 19:32:39,036 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 19:32:39,036 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 19:32:39,037 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 19:32:39,037 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 19:32:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-12 19:32:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-12 19:32:39,100 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:32:39,101 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 19:32:39,103 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:32:39,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:32:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1965894100, now seen corresponding path program 1 times [2018-11-12 19:32:39,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:32:39,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:32:39,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:32:39,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:32:39,160 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:32:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:32:39,724 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-12 19:32:39,741 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 19:32:39,743 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:32:39,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:32:39,744 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:32:39,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:32:39,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:32:39,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:32:39,769 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-12 19:32:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:32:47,426 INFO L93 Difference]: Finished difference Result 2166 states and 4013 transitions. [2018-11-12 19:32:47,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:32:47,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2018-11-12 19:32:47,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:32:47,475 INFO L225 Difference]: With dead ends: 2166 [2018-11-12 19:32:47,475 INFO L226 Difference]: Without dead ends: 1556 [2018-11-12 19:32:47,491 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:32:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2018-11-12 19:32:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1068. [2018-11-12 19:32:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-11-12 19:32:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1850 transitions. [2018-11-12 19:32:47,675 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1850 transitions. Word has length 72 [2018-11-12 19:32:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:32:47,676 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 1850 transitions. [2018-11-12 19:32:47,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:32:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1850 transitions. [2018-11-12 19:32:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-11-12 19:32:47,692 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:32:47,693 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, 1, 1] [2018-11-12 19:32:47,693 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:32:47,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:32:47,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1274618542, now seen corresponding path program 1 times [2018-11-12 19:32:47,694 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:32:47,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:32:47,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:32:47,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:32:47,696 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:32:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:32:48,033 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 19:32:48,034 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:32:48,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 19:32:48,034 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:32:48,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 19:32:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 19:32:48,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 19:32:48,039 INFO L87 Difference]: Start difference. First operand 1068 states and 1850 transitions. Second operand 6 states. [2018-11-12 19:32:55,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:32:55,272 INFO L93 Difference]: Finished difference Result 3059 states and 5419 transitions. [2018-11-12 19:32:55,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:32:55,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2018-11-12 19:32:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:32:55,288 INFO L225 Difference]: With dead ends: 3059 [2018-11-12 19:32:55,288 INFO L226 Difference]: Without dead ends: 1997 [2018-11-12 19:32:55,293 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 19:32:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2018-11-12 19:32:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1975. [2018-11-12 19:32:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2018-11-12 19:32:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3181 transitions. [2018-11-12 19:32:55,379 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3181 transitions. Word has length 148 [2018-11-12 19:32:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:32:55,380 INFO L480 AbstractCegarLoop]: Abstraction has 1975 states and 3181 transitions. [2018-11-12 19:32:55,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 19:32:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3181 transitions. [2018-11-12 19:32:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-11-12 19:32:55,389 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:32:55,389 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, 1, 1, 1, 1, 1, 1] [2018-11-12 19:32:55,389 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:32:55,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:32:55,390 INFO L82 PathProgramCache]: Analyzing trace with hash -73480886, now seen corresponding path program 1 times [2018-11-12 19:32:55,390 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:32:55,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:32:55,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:32:55,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:32:55,395 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:32:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:32:55,704 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 19:32:55,704 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:32:55,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 19:32:55,705 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:32:55,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 19:32:55,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 19:32:55,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 19:32:55,706 INFO L87 Difference]: Start difference. First operand 1975 states and 3181 transitions. Second operand 6 states. [2018-11-12 19:32:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:32:59,720 INFO L93 Difference]: Finished difference Result 4880 states and 7834 transitions. [2018-11-12 19:32:59,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:32:59,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2018-11-12 19:32:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:32:59,743 INFO L225 Difference]: With dead ends: 4880 [2018-11-12 19:32:59,744 INFO L226 Difference]: Without dead ends: 2911 [2018-11-12 19:32:59,753 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 19:32:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2018-11-12 19:32:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2880. [2018-11-12 19:32:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-11-12 19:32:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3936 transitions. [2018-11-12 19:32:59,849 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3936 transitions. Word has length 152 [2018-11-12 19:32:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:32:59,849 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3936 transitions. [2018-11-12 19:32:59,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 19:32:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3936 transitions. [2018-11-12 19:32:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-11-12 19:32:59,854 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:32:59,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:32:59,855 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:32:59,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:32:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash 363729319, now seen corresponding path program 1 times [2018-11-12 19:32:59,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:32:59,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:32:59,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:32:59,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:32:59,862 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:32:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:33:00,140 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 19:33:00,141 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:33:00,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:33:00,141 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:33:00,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:33:00,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:33:00,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:33:00,143 INFO L87 Difference]: Start difference. First operand 2880 states and 3936 transitions. Second operand 4 states. [2018-11-12 19:33:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:33:04,552 INFO L93 Difference]: Finished difference Result 5754 states and 7882 transitions. [2018-11-12 19:33:04,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:33:04,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2018-11-12 19:33:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:33:04,568 INFO L225 Difference]: With dead ends: 5754 [2018-11-12 19:33:04,568 INFO L226 Difference]: Without dead ends: 2880 [2018-11-12 19:33:04,580 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:33:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2018-11-12 19:33:04,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2880. [2018-11-12 19:33:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-11-12 19:33:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3720 transitions. [2018-11-12 19:33:04,642 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3720 transitions. Word has length 182 [2018-11-12 19:33:04,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:33:04,643 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3720 transitions. [2018-11-12 19:33:04,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:33:04,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3720 transitions. [2018-11-12 19:33:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-11-12 19:33:04,647 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:33:04,647 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, 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 19:33:04,647 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:33:04,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:33:04,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1344568352, now seen corresponding path program 1 times [2018-11-12 19:33:04,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:33:04,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:33:04,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:33:04,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:33:04,649 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:33:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:33:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-12 19:33:04,946 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:33:04,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:33:04,946 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:33:04,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:33:04,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:33:04,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:33:04,948 INFO L87 Difference]: Start difference. First operand 2880 states and 3720 transitions. Second operand 4 states. [2018-11-12 19:33:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:33:10,280 INFO L93 Difference]: Finished difference Result 11049 states and 14698 transitions. [2018-11-12 19:33:10,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:33:10,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2018-11-12 19:33:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:33:10,322 INFO L225 Difference]: With dead ends: 11049 [2018-11-12 19:33:10,322 INFO L226 Difference]: Without dead ends: 8175 [2018-11-12 19:33:10,334 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:33:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2018-11-12 19:33:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8171. [2018-11-12 19:33:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8171 states. [2018-11-12 19:33:10,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 9880 transitions. [2018-11-12 19:33:10,537 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 9880 transitions. Word has length 236 [2018-11-12 19:33:10,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:33:10,537 INFO L480 AbstractCegarLoop]: Abstraction has 8171 states and 9880 transitions. [2018-11-12 19:33:10,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:33:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 9880 transitions. [2018-11-12 19:33:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-11-12 19:33:10,545 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:33:10,546 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:10,546 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:33:10,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:33:10,546 INFO L82 PathProgramCache]: Analyzing trace with hash -522914045, now seen corresponding path program 1 times [2018-11-12 19:33:10,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:33:10,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:33:10,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:33:10,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:33:10,548 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:33:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:33:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 130 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:33:11,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:33:11,065 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:33:11,065 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 260 with the following transitions: [2018-11-12 19:33:11,068 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1174], [1182], [1186], [1188], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:33:11,116 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:33:11,117 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:33:11,737 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:33:11,749 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:33:11,751 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Performed 1254 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1254 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 26 variables. [2018-11-12 19:33:11,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:33:11,789 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:33:12,435 INFO L227 lantSequenceWeakener]: Weakened 250 states. On average, predicates are now at 75.83% of their original sizes. [2018-11-12 19:33:12,435 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:33:12,928 INFO L415 sIntCurrentIteration]: We unified 258 AI predicates to 258 [2018-11-12 19:33:12,929 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:33:12,930 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:33:12,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2018-11-12 19:33:12,930 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:33:12,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-12 19:33:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-12 19:33:12,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:33:12,932 INFO L87 Difference]: Start difference. First operand 8171 states and 9880 transitions. Second operand 8 states. [2018-11-12 19:33:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:33:39,226 INFO L93 Difference]: Finished difference Result 16772 states and 20222 transitions. [2018-11-12 19:33:39,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-12 19:33:39,226 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 259 [2018-11-12 19:33:39,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:33:39,259 INFO L225 Difference]: With dead ends: 16772 [2018-11-12 19:33:39,260 INFO L226 Difference]: Without dead ends: 8607 [2018-11-12 19:33:39,279 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 260 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-12 19:33:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8607 states. [2018-11-12 19:33:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8607 to 8605. [2018-11-12 19:33:39,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8605 states. [2018-11-12 19:33:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8605 states to 8605 states and 10325 transitions. [2018-11-12 19:33:39,465 INFO L78 Accepts]: Start accepts. Automaton has 8605 states and 10325 transitions. Word has length 259 [2018-11-12 19:33:39,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:33:39,466 INFO L480 AbstractCegarLoop]: Abstraction has 8605 states and 10325 transitions. [2018-11-12 19:33:39,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-12 19:33:39,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8605 states and 10325 transitions. [2018-11-12 19:33:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-11-12 19:33:39,476 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:33:39,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:39,476 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:33:39,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:33:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1507360391, now seen corresponding path program 1 times [2018-11-12 19:33:39,477 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:33:39,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:33:39,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:33:39,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:33:39,479 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:33:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:33:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 19:33:39,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:33:39,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:33:39,853 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:33:39,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:33:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:33:39,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:33:39,855 INFO L87 Difference]: Start difference. First operand 8605 states and 10325 transitions. Second operand 4 states. [2018-11-12 19:33:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:33:45,169 INFO L93 Difference]: Finished difference Result 22089 states and 27084 transitions. [2018-11-12 19:33:45,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:33:45,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 302 [2018-11-12 19:33:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:33:45,209 INFO L225 Difference]: With dead ends: 22089 [2018-11-12 19:33:45,209 INFO L226 Difference]: Without dead ends: 13924 [2018-11-12 19:33:45,240 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:33:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13924 states. [2018-11-12 19:33:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13924 to 13912. [2018-11-12 19:33:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13912 states. [2018-11-12 19:33:45,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13912 states to 13912 states and 16479 transitions. [2018-11-12 19:33:45,511 INFO L78 Accepts]: Start accepts. Automaton has 13912 states and 16479 transitions. Word has length 302 [2018-11-12 19:33:45,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:33:45,512 INFO L480 AbstractCegarLoop]: Abstraction has 13912 states and 16479 transitions. [2018-11-12 19:33:45,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:33:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 13912 states and 16479 transitions. [2018-11-12 19:33:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-11-12 19:33:45,526 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:33:45,526 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, 3, 3, 3, 2, 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 19:33:45,527 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:33:45,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:33:45,527 INFO L82 PathProgramCache]: Analyzing trace with hash -959165458, now seen corresponding path program 1 times [2018-11-12 19:33:45,527 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:33:45,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:33:45,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:33:45,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:33:45,528 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:33:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:33:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 205 proven. 142 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-11-12 19:33:45,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:33:45,869 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:33:45,869 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 312 with the following transitions: [2018-11-12 19:33:45,869 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1174], [1182], [1186], [1188], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:33:45,873 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:33:45,874 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:33:45,953 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:33:47,834 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:33:47,835 INFO L272 AbstractInterpreter]: Visited 98 different actions 580 times. Merged at 8 different actions 48 times. Widened at 1 different actions 1 times. Performed 12293 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12293 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 11 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 19:33:47,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:33:47,841 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:33:47,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:33:47,842 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:33:47,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:33:47,851 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:33:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:33:47,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:33:48,351 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-11-12 19:33:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 284 proven. 2 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-11-12 19:33:48,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:33:49,870 WARN L179 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-11-12 19:33:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 205 proven. 211 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:33:50,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:33:50,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-11-12 19:33:50,528 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:33:50,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 19:33:50,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 19:33:50,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-11-12 19:33:50,531 INFO L87 Difference]: Start difference. First operand 13912 states and 16479 transitions. Second operand 10 states. [2018-11-12 19:34:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:34:10,361 INFO L93 Difference]: Finished difference Result 46808 states and 58586 transitions. [2018-11-12 19:34:10,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-12 19:34:10,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 311 [2018-11-12 19:34:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:34:10,518 INFO L225 Difference]: With dead ends: 46808 [2018-11-12 19:34:10,518 INFO L226 Difference]: Without dead ends: 33336 [2018-11-12 19:34:10,578 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 622 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2018-11-12 19:34:10,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33336 states. [2018-11-12 19:34:11,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33336 to 33229. [2018-11-12 19:34:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33229 states. [2018-11-12 19:34:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33229 states to 33229 states and 40852 transitions. [2018-11-12 19:34:11,483 INFO L78 Accepts]: Start accepts. Automaton has 33229 states and 40852 transitions. Word has length 311 [2018-11-12 19:34:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:34:11,483 INFO L480 AbstractCegarLoop]: Abstraction has 33229 states and 40852 transitions. [2018-11-12 19:34:11,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 19:34:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 33229 states and 40852 transitions. [2018-11-12 19:34:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-11-12 19:34:11,504 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:34:11,504 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, 3, 3, 3, 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] [2018-11-12 19:34:11,504 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:34:11,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:34:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash -784168627, now seen corresponding path program 1 times [2018-11-12 19:34:11,505 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:34:11,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:34:11,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:34:11,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:34:11,506 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:34:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:34:11,988 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-11-12 19:34:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-11-12 19:34:12,060 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:34:12,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:34:12,061 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:34:12,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:34:12,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:34:12,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:34:12,062 INFO L87 Difference]: Start difference. First operand 33229 states and 40852 transitions. Second operand 4 states. [2018-11-12 19:34:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:34:20,589 INFO L93 Difference]: Finished difference Result 86765 states and 110071 transitions. [2018-11-12 19:34:20,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:34:20,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2018-11-12 19:34:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:34:20,786 INFO L225 Difference]: With dead ends: 86765 [2018-11-12 19:34:20,786 INFO L226 Difference]: Without dead ends: 53976 [2018-11-12 19:34:20,872 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 19:34:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53976 states. [2018-11-12 19:34:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53976 to 47799. [2018-11-12 19:34:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47799 states. [2018-11-12 19:34:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47799 states to 47799 states and 57342 transitions. [2018-11-12 19:34:21,914 INFO L78 Accepts]: Start accepts. Automaton has 47799 states and 57342 transitions. Word has length 334 [2018-11-12 19:34:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:34:21,915 INFO L480 AbstractCegarLoop]: Abstraction has 47799 states and 57342 transitions. [2018-11-12 19:34:21,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:34:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 47799 states and 57342 transitions. [2018-11-12 19:34:21,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-11-12 19:34:21,950 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:34:21,950 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-11-12 19:34:21,950 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:34:21,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:34:21,951 INFO L82 PathProgramCache]: Analyzing trace with hash -416043221, now seen corresponding path program 1 times [2018-11-12 19:34:21,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:34:21,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:34:21,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:34:21,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:34:21,952 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:34:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:34:22,531 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-11-12 19:34:22,730 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-11-12 19:34:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 438 proven. 128 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-12 19:34:22,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:34:22,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:34:22,991 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 409 with the following transitions: [2018-11-12 19:34:22,991 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1174], [1182], [1186], [1188], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:34:22,997 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:34:22,998 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:34:23,047 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:34:23,491 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:34:23,491 INFO L272 AbstractInterpreter]: Visited 120 different actions 346 times. Merged at 5 different actions 9 times. Never widened. Performed 5992 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5992 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 19:34:23,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:34:23,496 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:34:23,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:34:23,496 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:34:23,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:34:23,505 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:34:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:34:23,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:34:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 502 proven. 2 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2018-11-12 19:34:23,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:34:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 343 proven. 147 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-11-12 19:34:24,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:34:24,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-12 19:34:24,348 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:34:24,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 19:34:24,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 19:34:24,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-12 19:34:24,349 INFO L87 Difference]: Start difference. First operand 47799 states and 57342 transitions. Second operand 9 states. [2018-11-12 19:34:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:34:37,779 INFO L93 Difference]: Finished difference Result 124380 states and 149076 transitions. [2018-11-12 19:34:37,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-12 19:34:37,779 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 408 [2018-11-12 19:34:37,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:34:37,954 INFO L225 Difference]: With dead ends: 124380 [2018-11-12 19:34:37,955 INFO L226 Difference]: Without dead ends: 62328 [2018-11-12 19:34:38,078 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 841 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=401, Invalid=1321, Unknown=0, NotChecked=0, Total=1722 [2018-11-12 19:34:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62328 states. [2018-11-12 19:34:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62328 to 54029. [2018-11-12 19:34:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54029 states. [2018-11-12 19:34:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54029 states to 54029 states and 63047 transitions. [2018-11-12 19:34:39,005 INFO L78 Accepts]: Start accepts. Automaton has 54029 states and 63047 transitions. Word has length 408 [2018-11-12 19:34:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:34:39,005 INFO L480 AbstractCegarLoop]: Abstraction has 54029 states and 63047 transitions. [2018-11-12 19:34:39,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 19:34:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 54029 states and 63047 transitions. [2018-11-12 19:34:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2018-11-12 19:34:39,040 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:34:39,041 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:34:39,041 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:34:39,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:34:39,041 INFO L82 PathProgramCache]: Analyzing trace with hash -391323874, now seen corresponding path program 1 times [2018-11-12 19:34:39,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:34:39,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:34:39,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:34:39,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:34:39,042 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:34:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:34:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-11-12 19:34:39,708 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:34:39,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 19:34:39,708 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:34:39,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 19:34:39,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 19:34:39,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:34:39,710 INFO L87 Difference]: Start difference. First operand 54029 states and 63047 transitions. Second operand 3 states. [2018-11-12 19:34:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:34:43,215 INFO L93 Difference]: Finished difference Result 133673 states and 157383 transitions. [2018-11-12 19:34:43,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 19:34:43,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2018-11-12 19:34:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:34:43,388 INFO L225 Difference]: With dead ends: 133673 [2018-11-12 19:34:43,388 INFO L226 Difference]: Without dead ends: 59912 [2018-11-12 19:34:43,526 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:34:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59912 states. [2018-11-12 19:34:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59912 to 55558. [2018-11-12 19:34:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55558 states. [2018-11-12 19:34:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55558 states to 55558 states and 64179 transitions. [2018-11-12 19:34:44,411 INFO L78 Accepts]: Start accepts. Automaton has 55558 states and 64179 transitions. Word has length 467 [2018-11-12 19:34:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:34:44,412 INFO L480 AbstractCegarLoop]: Abstraction has 55558 states and 64179 transitions. [2018-11-12 19:34:44,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 19:34:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 55558 states and 64179 transitions. [2018-11-12 19:34:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-11-12 19:34:44,481 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:34:44,482 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:34:44,482 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:34:44,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:34:44,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1160423485, now seen corresponding path program 1 times [2018-11-12 19:34:44,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:34:44,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:34:44,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:34:44,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:34:44,484 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:34:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:34:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 273 proven. 4 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2018-11-12 19:34:45,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:34:45,141 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:34:45,142 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 784 with the following transitions: [2018-11-12 19:34:45,142 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1174], [1182], [1186], [1188], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1493], [1498], [1500], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2031], [2034], [2038], [2039], [2043], [2047], [2050], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:34:45,149 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:34:45,150 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:34:45,209 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:34:46,575 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:34:46,576 INFO L272 AbstractInterpreter]: Visited 256 different actions 754 times. Merged at 5 different actions 9 times. Never widened. Performed 12991 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12991 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 19:34:46,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:34:46,580 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:34:47,843 INFO L227 lantSequenceWeakener]: Weakened 777 states. On average, predicates are now at 75.32% of their original sizes. [2018-11-12 19:34:47,844 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:34:48,019 INFO L415 sIntCurrentIteration]: We unified 782 AI predicates to 782 [2018-11-12 19:34:48,019 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:34:48,020 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:34:48,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [3] total 13 [2018-11-12 19:34:48,020 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:34:48,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-12 19:34:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-12 19:34:48,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-12 19:34:48,022 INFO L87 Difference]: Start difference. First operand 55558 states and 64179 transitions. Second operand 12 states. [2018-11-12 19:35:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:35:49,040 INFO L93 Difference]: Finished difference Result 114642 states and 132504 transitions. [2018-11-12 19:35:49,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 19:35:49,040 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 783 [2018-11-12 19:35:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:35:49,189 INFO L225 Difference]: With dead ends: 114642 [2018-11-12 19:35:49,190 INFO L226 Difference]: Without dead ends: 59524 [2018-11-12 19:35:49,250 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 796 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2018-11-12 19:35:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59524 states. [2018-11-12 19:35:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59524 to 59503. [2018-11-12 19:35:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59503 states. [2018-11-12 19:35:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59503 states to 59503 states and 68550 transitions. [2018-11-12 19:35:50,910 INFO L78 Accepts]: Start accepts. Automaton has 59503 states and 68550 transitions. Word has length 783 [2018-11-12 19:35:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:35:50,911 INFO L480 AbstractCegarLoop]: Abstraction has 59503 states and 68550 transitions. [2018-11-12 19:35:50,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-12 19:35:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 59503 states and 68550 transitions. [2018-11-12 19:35:50,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2018-11-12 19:35:50,961 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:35:50,962 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 19:35:50,962 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:35:50,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:35:50,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1380251618, now seen corresponding path program 1 times [2018-11-12 19:35:50,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:35:50,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:35:50,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:35:50,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:35:50,964 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:35:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:35:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 351 proven. 4 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2018-11-12 19:35:51,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:35:51,558 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:35:51,559 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 871 with the following transitions: [2018-11-12 19:35:51,559 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1174], [1182], [1186], [1188], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1493], [1498], [1500], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2031], [2034], [2038], [2039], [2043], [2047], [2050], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:35:51,565 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:35:51,565 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:35:51,621 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:35:53,280 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:35:53,280 INFO L272 AbstractInterpreter]: Visited 258 different actions 1024 times. Merged at 7 different actions 28 times. Never widened. Performed 18876 root evaluator evaluations with a maximum evaluation depth of 6. Performed 18876 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 19:35:53,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:35:53,288 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:35:53,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:35:53,288 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:35:53,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:35:53,299 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:35:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:35:53,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:35:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 919 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2018-11-12 19:35:53,851 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:35:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 351 proven. 4 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2018-11-12 19:35:54,397 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-12 19:35:54,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-11-12 19:35:54,398 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:35:54,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 19:35:54,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 19:35:54,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:35:54,400 INFO L87 Difference]: Start difference. First operand 59503 states and 68550 transitions. Second operand 3 states. Received shutdown request... [2018-11-12 19:35:56,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 19:35:56,524 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 19:35:56,531 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 19:35:56,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 07:35:56 BoogieIcfgContainer [2018-11-12 19:35:56,531 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 19:35:56,532 INFO L168 Benchmark]: Toolchain (without parser) took 208781.89 ms. Allocated memory was 1.5 GB in the beginning and 5.4 GB in the end (delta: 3.9 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.5 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-11-12 19:35:56,533 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 19:35:56,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1559.99 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-11-12 19:35:56,535 INFO L168 Benchmark]: Boogie Procedure Inliner took 270.67 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 793.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -976.1 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2018-11-12 19:35:56,536 INFO L168 Benchmark]: Boogie Preprocessor took 232.28 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-11-12 19:35:56,536 INFO L168 Benchmark]: RCFGBuilder took 9125.74 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 453.9 MB). Peak memory consumption was 453.9 MB. Max. memory is 7.1 GB. [2018-11-12 19:35:56,537 INFO L168 Benchmark]: TraceAbstraction took 197587.91 ms. Allocated memory was 2.3 GB in the beginning and 5.4 GB in the end (delta: 3.1 GB). Free memory was 1.8 GB in the beginning and 3.0 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-11-12 19:35:56,542 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1559.99 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 270.67 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 793.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -976.1 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 232.28 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9125.74 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 453.9 MB). Peak memory consumption was 453.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 197587.91 ms. Allocated memory was 2.3 GB in the beginning and 5.4 GB in the end (delta: 3.1 GB). Free memory was 1.8 GB in the beginning and 3.0 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 203]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 203). Cancelled while BasicCegarLoop was constructing difference of abstraction (59503states) and FLOYD_HOARE automaton (currently 3 states, 3 states before enhancement),while ReachableStatesComputation was computing reachable states (53131 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 197.5s OverallTime, 13 OverallIterations, 6 TraceHistogramMax, 170.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6721 SDtfs, 24960 SDslu, 4210 SDs, 0 SdLazy, 47957 SolverSat, 8994 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 103.0s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 4378 GetRequests, 4252 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59503occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 6.3s AbstIntTime, 5 AbstIntIterations, 2 AbstIntStrong, 0.9984238750380056 AbsIntWeakeningRatio, 0.06442307692307692 AbsIntAvgWeakeningVarsNumRemoved, 23.297115384615385 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 19517 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 6113 NumberOfCodeBlocks, 6113 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 7683 ConstructedInterpolants, 93 QuantifiedInterpolants, 7289874 SizeOfPredicates, 6 NumberOfNonLiveVariables, 2407 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 19 InterpolantComputations, 9 PerfectInterpolantSequences, 9766/10482 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown