java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label23_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 20:58:19,759 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 20:58:19,761 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 20:58:19,774 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 20:58:19,775 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 20:58:19,776 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 20:58:19,778 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 20:58:19,779 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 20:58:19,781 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 20:58:19,782 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 20:58:19,783 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 20:58:19,783 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 20:58:19,784 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 20:58:19,785 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 20:58:19,787 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 20:58:19,788 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 20:58:19,789 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 20:58:19,791 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 20:58:19,793 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 20:58:19,794 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 20:58:19,795 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 20:58:19,797 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 20:58:19,799 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 20:58:19,799 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 20:58:19,800 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 20:58:19,801 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 20:58:19,802 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 20:58:19,802 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 20:58:19,803 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 20:58:19,804 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 20:58:19,805 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 20:58:19,805 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 20:58:19,806 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 20:58:19,806 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 20:58:19,809 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 20:58:19,810 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 20:58:19,810 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 20:58:19,840 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 20:58:19,840 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 20:58:19,842 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 20:58:19,842 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 20:58:19,842 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 20:58:19,843 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 20:58:19,843 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 20:58:19,843 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 20:58:19,843 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 20:58:19,843 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 20:58:19,844 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 20:58:19,844 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 20:58:19,845 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 20:58:19,845 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 20:58:19,845 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 20:58:19,845 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 20:58:19,845 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 20:58:19,846 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 20:58:19,846 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 20:58:19,846 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 20:58:19,846 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 20:58:19,846 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 20:58:19,847 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 20:58:19,847 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 20:58:19,847 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 20:58:19,847 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 20:58:19,847 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 20:58:19,848 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 20:58:19,848 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 20:58:19,848 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 20:58:19,848 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 20:58:19,848 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 20:58:19,848 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 20:58:19,849 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 20:58:19,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 20:58:19,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 20:58:19,927 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 20:58:19,929 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 20:58:19,930 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 20:58:19,930 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label23_true-unreach-call.c [2018-10-24 20:58:20,006 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2291c1a98/c0b143a1f9d94e6f98c8d913cce95042/FLAGd11a0db10 [2018-10-24 20:58:20,633 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 20:58:20,634 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label23_true-unreach-call.c [2018-10-24 20:58:20,653 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2291c1a98/c0b143a1f9d94e6f98c8d913cce95042/FLAGd11a0db10 [2018-10-24 20:58:20,672 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2291c1a98/c0b143a1f9d94e6f98c8d913cce95042 [2018-10-24 20:58:20,685 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 20:58:20,686 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 20:58:20,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 20:58:20,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 20:58:20,691 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 20:58:20,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 08:58:20" (1/1) ... [2018-10-24 20:58:20,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46dcfc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:20, skipping insertion in model container [2018-10-24 20:58:20,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 08:58:20" (1/1) ... [2018-10-24 20:58:20,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 20:58:20,766 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 20:58:21,261 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 20:58:21,266 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 20:58:21,420 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 20:58:21,438 INFO L193 MainTranslator]: Completed translation [2018-10-24 20:58:21,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21 WrapperNode [2018-10-24 20:58:21,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 20:58:21,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 20:58:21,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 20:58:21,440 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 20:58:21,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (1/1) ... [2018-10-24 20:58:21,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (1/1) ... [2018-10-24 20:58:21,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 20:58:21,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 20:58:21,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 20:58:21,658 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 20:58:21,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (1/1) ... [2018-10-24 20:58:21,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (1/1) ... [2018-10-24 20:58:21,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (1/1) ... [2018-10-24 20:58:21,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (1/1) ... [2018-10-24 20:58:21,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (1/1) ... [2018-10-24 20:58:21,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (1/1) ... [2018-10-24 20:58:21,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (1/1) ... [2018-10-24 20:58:21,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 20:58:21,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 20:58:21,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 20:58:21,789 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 20:58:21,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 20:58:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 20:58:21,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 20:58:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 20:58:21,870 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 20:58:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 20:58:21,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 20:58:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 20:58:21,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 20:58:25,649 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 20:58:25,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 08:58:25 BoogieIcfgContainer [2018-10-24 20:58:25,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 20:58:25,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 20:58:25,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 20:58:25,655 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 20:58:25,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 08:58:20" (1/3) ... [2018-10-24 20:58:25,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af2ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 08:58:25, skipping insertion in model container [2018-10-24 20:58:25,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:58:21" (2/3) ... [2018-10-24 20:58:25,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af2ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 08:58:25, skipping insertion in model container [2018-10-24 20:58:25,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 08:58:25" (3/3) ... [2018-10-24 20:58:25,659 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label23_true-unreach-call.c [2018-10-24 20:58:25,669 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 20:58:25,678 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 20:58:25,695 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 20:58:25,733 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 20:58:25,733 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 20:58:25,733 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 20:58:25,734 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 20:58:25,734 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 20:58:25,734 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 20:58:25,734 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 20:58:25,734 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 20:58:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-10-24 20:58:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-24 20:58:25,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 20:58:25,772 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] [2018-10-24 20:58:25,777 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 20:58:25,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 20:58:25,784 INFO L82 PathProgramCache]: Analyzing trace with hash 508483465, now seen corresponding path program 1 times [2018-10-24 20:58:25,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 20:58:25,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 20:58:25,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 20:58:25,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 20:58:25,835 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 20:58:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 20:58:26,240 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 20:58:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 20:58:26,365 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 20:58:26,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 20:58:26,366 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 20:58:26,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 20:58:26,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 20:58:26,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 20:58:26,393 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2018-10-24 20:58:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 20:58:28,015 INFO L93 Difference]: Finished difference Result 574 states and 992 transitions. [2018-10-24 20:58:28,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 20:58:28,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2018-10-24 20:58:28,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 20:58:28,040 INFO L225 Difference]: With dead ends: 574 [2018-10-24 20:58:28,040 INFO L226 Difference]: Without dead ends: 356 [2018-10-24 20:58:28,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 20:58:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-10-24 20:58:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-10-24 20:58:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-10-24 20:58:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 609 transitions. [2018-10-24 20:58:28,174 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 609 transitions. Word has length 53 [2018-10-24 20:58:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 20:58:28,175 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 609 transitions. [2018-10-24 20:58:28,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 20:58:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 609 transitions. [2018-10-24 20:58:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-24 20:58:28,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 20:58:28,193 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 20:58:28,193 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 20:58:28,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 20:58:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1327667053, now seen corresponding path program 1 times [2018-10-24 20:58:28,195 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 20:58:28,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 20:58:28,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 20:58:28,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 20:58:28,198 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 20:58:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 20:58:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 20:58:28,576 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 20:58:28,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 20:58:28,576 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 20:58:28,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 20:58:28,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 20:58:28,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 20:58:28,580 INFO L87 Difference]: Start difference. First operand 356 states and 609 transitions. Second operand 5 states. [2018-10-24 20:58:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 20:58:34,662 INFO L93 Difference]: Finished difference Result 1289 states and 2315 transitions. [2018-10-24 20:58:34,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 20:58:34,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2018-10-24 20:58:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 20:58:34,674 INFO L225 Difference]: With dead ends: 1289 [2018-10-24 20:58:34,674 INFO L226 Difference]: Without dead ends: 939 [2018-10-24 20:58:34,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 20:58:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2018-10-24 20:58:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 926. [2018-10-24 20:58:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2018-10-24 20:58:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1444 transitions. [2018-10-24 20:58:34,751 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1444 transitions. Word has length 136 [2018-10-24 20:58:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 20:58:34,752 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1444 transitions. [2018-10-24 20:58:34,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 20:58:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1444 transitions. [2018-10-24 20:58:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-24 20:58:34,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 20:58:34,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 20:58:34,759 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 20:58:34,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 20:58:34,760 INFO L82 PathProgramCache]: Analyzing trace with hash -734844493, now seen corresponding path program 1 times [2018-10-24 20:58:34,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 20:58:34,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 20:58:34,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 20:58:34,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 20:58:34,762 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 20:58:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 20:58:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 20:58:35,079 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 20:58:35,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 20:58:35,080 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 20:58:35,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 20:58:35,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 20:58:35,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 20:58:35,081 INFO L87 Difference]: Start difference. First operand 926 states and 1444 transitions. Second operand 6 states. [2018-10-24 20:58:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 20:58:39,736 INFO L93 Difference]: Finished difference Result 2537 states and 4091 transitions. [2018-10-24 20:58:39,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 20:58:39,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2018-10-24 20:58:39,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 20:58:39,757 INFO L225 Difference]: With dead ends: 2537 [2018-10-24 20:58:39,757 INFO L226 Difference]: Without dead ends: 1617 [2018-10-24 20:58:39,768 INFO L605 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 [2018-10-24 20:58:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2018-10-24 20:58:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1586. [2018-10-24 20:58:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1586 states. [2018-10-24 20:58:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2321 transitions. [2018-10-24 20:58:39,837 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2321 transitions. Word has length 152 [2018-10-24 20:58:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 20:58:39,838 INFO L481 AbstractCegarLoop]: Abstraction has 1586 states and 2321 transitions. [2018-10-24 20:58:39,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 20:58:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2321 transitions. [2018-10-24 20:58:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-24 20:58:39,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 20:58:39,845 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 20:58:39,846 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 20:58:39,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 20:58:39,846 INFO L82 PathProgramCache]: Analyzing trace with hash -829584541, now seen corresponding path program 1 times [2018-10-24 20:58:39,846 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 20:58:39,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 20:58:39,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 20:58:39,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 20:58:39,848 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 20:58:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 20:58:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 20:58:40,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 20:58:40,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 20:58:40,072 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 20:58:40,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 20:58:40,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 20:58:40,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 20:58:40,074 INFO L87 Difference]: Start difference. First operand 1586 states and 2321 transitions. Second operand 6 states. [2018-10-24 20:58:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 20:58:41,552 INFO L93 Difference]: Finished difference Result 3508 states and 5316 transitions. [2018-10-24 20:58:41,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 20:58:41,559 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2018-10-24 20:58:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 20:58:41,579 INFO L225 Difference]: With dead ends: 3508 [2018-10-24 20:58:41,579 INFO L226 Difference]: Without dead ends: 1928 [2018-10-24 20:58:41,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 20:58:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2018-10-24 20:58:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1889. [2018-10-24 20:58:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1889 states. [2018-10-24 20:58:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2675 transitions. [2018-10-24 20:58:41,662 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2675 transitions. Word has length 176 [2018-10-24 20:58:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 20:58:41,663 INFO L481 AbstractCegarLoop]: Abstraction has 1889 states and 2675 transitions. [2018-10-24 20:58:41,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 20:58:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2675 transitions. [2018-10-24 20:58:41,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-24 20:58:41,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 20:58:41,672 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 20:58:41,672 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 20:58:41,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 20:58:41,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1805277256, now seen corresponding path program 1 times [2018-10-24 20:58:41,673 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 20:58:41,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 20:58:41,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 20:58:41,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 20:58:41,674 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 20:58:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 20:58:42,140 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 20:58:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 20:58:42,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 20:58:42,540 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 20:58:42,541 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 217 with the following transitions: [2018-10-24 20:58:42,543 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [325], [327], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [546], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-24 20:58:42,616 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 20:58:42,616 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 20:58:45,000 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 20:58:57,588 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 20:58:57,590 INFO L272 AbstractInterpreter]: Visited 91 different actions 516 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-24 20:58:57,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 20:58:57,612 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 20:59:01,425 INFO L232 lantSequenceWeakener]: Weakened 31 states. On average, predicates are now at 77.27% of their original sizes. [2018-10-24 20:59:01,426 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 20:59:28,203 INFO L413 sIntCurrentIteration]: We have 215 unified AI predicates [2018-10-24 20:59:28,204 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 20:59:28,205 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 20:59:28,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [12] total 29 [2018-10-24 20:59:28,205 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 20:59:28,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 20:59:28,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 20:59:28,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-10-24 20:59:28,207 INFO L87 Difference]: Start difference. First operand 1889 states and 2675 transitions. Second operand 19 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown