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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label54_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 23:49:22,839 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 23:49:22,841 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 23:49:22,854 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 23:49:22,854 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 23:49:22,855 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 23:49:22,856 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 23:49:22,858 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 23:49:22,860 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 23:49:22,861 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 23:49:22,862 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 23:49:22,862 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 23:49:22,863 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 23:49:22,864 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 23:49:22,865 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 23:49:22,866 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 23:49:22,867 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 23:49:22,868 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 23:49:22,870 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 23:49:22,872 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 23:49:22,873 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 23:49:22,874 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 23:49:22,876 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 23:49:22,877 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 23:49:22,877 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 23:49:22,878 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 23:49:22,879 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 23:49:22,880 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 23:49:22,880 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 23:49:22,882 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 23:49:22,882 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 23:49:22,882 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 23:49:22,885 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 23:49:22,900 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 23:49:22,900 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 23:49:22,901 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 23:49:22,901 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 23:49:22,902 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 23:49:22,902 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 23:49:22,902 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 23:49:22,902 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 23:49:22,902 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 23:49:22,902 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 23:49:22,903 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 23:49:22,903 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 23:49:22,903 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 23:49:22,903 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 23:49:22,904 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 23:49:22,904 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 23:49:22,904 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 23:49:22,904 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 23:49:22,905 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 23:49:22,905 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 23:49:22,905 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 23:49:22,905 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 23:49:22,905 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 23:49:22,906 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 23:49:22,906 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 23:49:22,906 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 23:49:22,906 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 23:49:22,906 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 23:49:22,907 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 23:49:22,907 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 23:49:22,907 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 23:49:22,907 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 23:49:22,907 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 23:49:22,908 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 23:49:22,908 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 23:49:22,908 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 23:49:22,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 23:49:22,979 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 23:49:22,983 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 23:49:22,985 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 23:49:22,985 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 23:49:22,986 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label54_false-unreach-call.c [2018-10-24 23:49:23,045 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fb24a3311/e08b151848484f6ba9f4697efcbbf648/FLAG96e4693ee [2018-10-24 23:49:23,748 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 23:49:23,750 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label54_false-unreach-call.c [2018-10-24 23:49:23,782 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fb24a3311/e08b151848484f6ba9f4697efcbbf648/FLAG96e4693ee [2018-10-24 23:49:23,807 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fb24a3311/e08b151848484f6ba9f4697efcbbf648 [2018-10-24 23:49:23,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 23:49:23,824 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 23:49:23,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 23:49:23,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 23:49:23,833 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 23:49:23,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:49:23" (1/1) ... [2018-10-24 23:49:23,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65405690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:23, skipping insertion in model container [2018-10-24 23:49:23,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:49:23" (1/1) ... [2018-10-24 23:49:23,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 23:49:23,971 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 23:49:24,896 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:49:24,902 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 23:49:25,334 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:49:25,359 INFO L193 MainTranslator]: Completed translation [2018-10-24 23:49:25,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25 WrapperNode [2018-10-24 23:49:25,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 23:49:25,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 23:49:25,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 23:49:25,361 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 23:49:25,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (1/1) ... [2018-10-24 23:49:25,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (1/1) ... [2018-10-24 23:49:25,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 23:49:25,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 23:49:25,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 23:49:25,913 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 23:49:25,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (1/1) ... [2018-10-24 23:49:25,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (1/1) ... [2018-10-24 23:49:25,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (1/1) ... [2018-10-24 23:49:25,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (1/1) ... [2018-10-24 23:49:26,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (1/1) ... [2018-10-24 23:49:26,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (1/1) ... [2018-10-24 23:49:26,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (1/1) ... [2018-10-24 23:49:26,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 23:49:26,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 23:49:26,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 23:49:26,191 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 23:49:26,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (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 23:49:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 23:49:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 23:49:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 23:49:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 23:49:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 23:49:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 23:49:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 23:49:26,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 23:49:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 23:49:26,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 23:49:38,524 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 23:49:38,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:49:38 BoogieIcfgContainer [2018-10-24 23:49:38,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 23:49:38,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 23:49:38,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 23:49:38,531 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 23:49:38,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:49:23" (1/3) ... [2018-10-24 23:49:38,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e3d14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:49:38, skipping insertion in model container [2018-10-24 23:49:38,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:25" (2/3) ... [2018-10-24 23:49:38,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e3d14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:49:38, skipping insertion in model container [2018-10-24 23:49:38,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:49:38" (3/3) ... [2018-10-24 23:49:38,535 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label54_false-unreach-call.c [2018-10-24 23:49:38,547 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 23:49:38,558 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 23:49:38,578 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 23:49:38,624 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 23:49:38,624 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 23:49:38,624 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 23:49:38,624 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 23:49:38,625 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 23:49:38,625 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 23:49:38,625 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 23:49:38,625 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 23:49:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-24 23:49:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 23:49:38,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:49:38,671 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] [2018-10-24 23:49:38,673 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:49:38,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:49:38,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1533531428, now seen corresponding path program 1 times [2018-10-24 23:49:38,684 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:49:38,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:49:38,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:49:38,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:49:38,748 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:49:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:49:39,145 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 23:49:39,147 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:49:39,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:49:39,148 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:49:39,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:49:39,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:49:39,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:49:39,170 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-24 23:49:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:49:49,434 INFO L93 Difference]: Finished difference Result 2162 states and 4007 transitions. [2018-10-24 23:49:49,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:49:49,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-10-24 23:49:49,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:49:49,472 INFO L225 Difference]: With dead ends: 2162 [2018-10-24 23:49:49,473 INFO L226 Difference]: Without dead ends: 1552 [2018-10-24 23:49:49,482 INFO L605 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 [2018-10-24 23:49:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2018-10-24 23:49:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1525. [2018-10-24 23:49:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1525 states. [2018-10-24 23:49:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2696 transitions. [2018-10-24 23:49:49,629 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2696 transitions. Word has length 20 [2018-10-24 23:49:49,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:49:49,630 INFO L481 AbstractCegarLoop]: Abstraction has 1525 states and 2696 transitions. [2018-10-24 23:49:49,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:49:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2696 transitions. [2018-10-24 23:49:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-24 23:49:49,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:49:49,639 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 23:49:49,640 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:49:49,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:49:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1982050186, now seen corresponding path program 1 times [2018-10-24 23:49:49,640 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:49:49,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:49:49,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:49:49,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:49:49,643 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:49:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:49:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:49:50,170 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:49:50,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 23:49:50,170 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:49:50,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:49:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:49:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:49:50,173 INFO L87 Difference]: Start difference. First operand 1525 states and 2696 transitions. Second operand 6 states. [2018-10-24 23:50:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:50:10,981 INFO L93 Difference]: Finished difference Result 5786 states and 10682 transitions. [2018-10-24 23:50:10,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:50:10,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2018-10-24 23:50:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:50:11,021 INFO L225 Difference]: With dead ends: 5786 [2018-10-24 23:50:11,022 INFO L226 Difference]: Without dead ends: 4267 [2018-10-24 23:50:11,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 23:50:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2018-10-24 23:50:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 4243. [2018-10-24 23:50:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4243 states. [2018-10-24 23:50:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4243 states to 4243 states and 6361 transitions. [2018-10-24 23:50:11,182 INFO L78 Accepts]: Start accepts. Automaton has 4243 states and 6361 transitions. Word has length 99 [2018-10-24 23:50:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:50:11,183 INFO L481 AbstractCegarLoop]: Abstraction has 4243 states and 6361 transitions. [2018-10-24 23:50:11,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:50:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4243 states and 6361 transitions. [2018-10-24 23:50:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-24 23:50:11,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:50:11,198 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 23:50:11,198 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:50:11,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:11,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1539737542, now seen corresponding path program 1 times [2018-10-24 23:50:11,199 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:50:11,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:11,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:11,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:11,200 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:50:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:50:11,497 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:50:11,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 23:50:11,498 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:50:11,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:50:11,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:50:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:50:11,499 INFO L87 Difference]: Start difference. First operand 4243 states and 6361 transitions. Second operand 6 states. [2018-10-24 23:50:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:50:18,426 INFO L93 Difference]: Finished difference Result 12712 states and 20702 transitions. [2018-10-24 23:50:18,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:50:18,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-10-24 23:50:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:50:18,492 INFO L225 Difference]: With dead ends: 12712 [2018-10-24 23:50:18,492 INFO L226 Difference]: Without dead ends: 8475 [2018-10-24 23:50:18,517 INFO L605 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 [2018-10-24 23:50:18,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8475 states. [2018-10-24 23:50:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8475 to 8390. [2018-10-24 23:50:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8390 states. [2018-10-24 23:50:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 12580 transitions. [2018-10-24 23:50:18,803 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 12580 transitions. Word has length 100 [2018-10-24 23:50:18,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:50:18,804 INFO L481 AbstractCegarLoop]: Abstraction has 8390 states and 12580 transitions. [2018-10-24 23:50:18,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:50:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 12580 transitions. [2018-10-24 23:50:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-24 23:50:18,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:50:18,819 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:50:18,819 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:50:18,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:18,819 INFO L82 PathProgramCache]: Analyzing trace with hash -724720364, now seen corresponding path program 1 times [2018-10-24 23:50:18,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:50:18,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:18,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:18,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:18,823 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:50:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:19,177 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 23:50:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-24 23:50:19,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:50:19,533 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:50:19,534 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 175 with the following transitions: [2018-10-24 23:50:19,536 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [770], [772], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1239], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:50:19,585 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:50:19,586 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:50:21,356 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:50:21,357 INFO L272 AbstractInterpreter]: Visited 88 different actions 250 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 23:50:21,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:21,408 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:50:21,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:50:21,408 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 23:50:21,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:21,432 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:50:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:21,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:50:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:50:22,200 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:50:22,456 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-24 23:50:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:50:23,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:50:23,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-24 23:50:23,163 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:50:23,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 23:50:23,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 23:50:23,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-24 23:50:23,165 INFO L87 Difference]: Start difference. First operand 8390 states and 12580 transitions. Second operand 9 states. [2018-10-24 23:50:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:50:34,643 INFO L93 Difference]: Finished difference Result 20874 states and 31687 transitions. [2018-10-24 23:50:34,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 23:50:34,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2018-10-24 23:50:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:50:34,741 INFO L225 Difference]: With dead ends: 20874 [2018-10-24 23:50:34,741 INFO L226 Difference]: Without dead ends: 12455 [2018-10-24 23:50:34,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 346 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2018-10-24 23:50:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12455 states. [2018-10-24 23:50:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12455 to 12430. [2018-10-24 23:50:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12430 states. [2018-10-24 23:50:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12430 states to 12430 states and 15970 transitions. [2018-10-24 23:50:35,195 INFO L78 Accepts]: Start accepts. Automaton has 12430 states and 15970 transitions. Word has length 174 [2018-10-24 23:50:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:50:35,196 INFO L481 AbstractCegarLoop]: Abstraction has 12430 states and 15970 transitions. [2018-10-24 23:50:35,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 23:50:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12430 states and 15970 transitions. [2018-10-24 23:50:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-24 23:50:35,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:50:35,201 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:50:35,201 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:50:35,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash -889055236, now seen corresponding path program 1 times [2018-10-24 23:50:35,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:50:35,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:35,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:35,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:35,209 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:50:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:35,594 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 23:50:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 23:50:36,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:50:36,532 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:50:36,533 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 188 with the following transitions: [2018-10-24 23:50:36,533 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [770], [772], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:50:36,538 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:50:36,539 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:50:37,181 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:50:37,181 INFO L272 AbstractInterpreter]: Visited 97 different actions 293 times. Merged at 7 different actions 25 times. Widened at 1 different actions 1 times. Found 3 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 23:50:37,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:37,221 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:50:37,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:50:37,222 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 23:50:37,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:37,236 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:50:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:37,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:50:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 23:50:37,507 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:50:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 23:50:37,735 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 23:50:37,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-24 23:50:37,736 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:50:37,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:50:37,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:50:37,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:50:37,737 INFO L87 Difference]: Start difference. First operand 12430 states and 15970 transitions. Second operand 3 states. [2018-10-24 23:50:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:50:42,610 INFO L93 Difference]: Finished difference Result 24854 states and 31934 transitions. [2018-10-24 23:50:42,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:50:42,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 187 [2018-10-24 23:50:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:50:42,656 INFO L225 Difference]: With dead ends: 24854 [2018-10-24 23:50:42,656 INFO L226 Difference]: Without dead ends: 12430 [2018-10-24 23:50:42,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 374 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:50:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12430 states. [2018-10-24 23:50:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12430 to 12430. [2018-10-24 23:50:42,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12430 states. [2018-10-24 23:50:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12430 states to 12430 states and 15348 transitions. [2018-10-24 23:50:42,967 INFO L78 Accepts]: Start accepts. Automaton has 12430 states and 15348 transitions. Word has length 187 [2018-10-24 23:50:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:50:42,967 INFO L481 AbstractCegarLoop]: Abstraction has 12430 states and 15348 transitions. [2018-10-24 23:50:42,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:50:42,970 INFO L276 IsEmpty]: Start isEmpty. Operand 12430 states and 15348 transitions. [2018-10-24 23:50:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-24 23:50:42,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:50:42,977 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 23:50:42,977 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:50:42,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -995825682, now seen corresponding path program 1 times [2018-10-24 23:50:42,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:50:42,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:42,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:42,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:42,986 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:50:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 23:50:43,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:50:43,531 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:50:43,531 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 265 with the following transitions: [2018-10-24 23:50:43,532 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [770], [772], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:50:43,540 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:50:43,540 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:50:43,794 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:50:43,794 INFO L272 AbstractInterpreter]: Visited 98 different actions 197 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-24 23:50:43,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:43,831 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:50:43,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:50:43,832 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 23:50:43,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:43,843 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:50:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:43,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:50:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 23:50:44,303 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:50:44,536 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-24 23:50:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 23:50:45,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:50:45,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-10-24 23:50:45,419 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:50:45,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 23:50:45,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 23:50:45,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-24 23:50:45,420 INFO L87 Difference]: Start difference. First operand 12430 states and 15348 transitions. Second operand 7 states. [2018-10-24 23:50:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:50:58,882 INFO L93 Difference]: Finished difference Result 37384 states and 46740 transitions. [2018-10-24 23:50:58,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 23:50:58,883 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 264 [2018-10-24 23:50:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:50:58,996 INFO L225 Difference]: With dead ends: 37384 [2018-10-24 23:50:58,996 INFO L226 Difference]: Without dead ends: 24926 [2018-10-24 23:50:59,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 530 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-24 23:50:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24926 states. [2018-10-24 23:50:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24926 to 22767. [2018-10-24 23:50:59,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22767 states. [2018-10-24 23:50:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22767 states to 22767 states and 27229 transitions. [2018-10-24 23:50:59,637 INFO L78 Accepts]: Start accepts. Automaton has 22767 states and 27229 transitions. Word has length 264 [2018-10-24 23:50:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:50:59,638 INFO L481 AbstractCegarLoop]: Abstraction has 22767 states and 27229 transitions. [2018-10-24 23:50:59,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 23:50:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 22767 states and 27229 transitions. [2018-10-24 23:50:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-10-24 23:50:59,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:50:59,648 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:59,648 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:50:59,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:59,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1598611723, now seen corresponding path program 1 times [2018-10-24 23:50:59,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:50:59,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:59,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:59,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:59,650 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:50:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 23:51:00,307 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:51:00,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:51:00,308 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:51:00,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:51:00,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:51:00,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:51:00,309 INFO L87 Difference]: Start difference. First operand 22767 states and 27229 transitions. Second operand 4 states. [2018-10-24 23:51:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:51:08,190 INFO L93 Difference]: Finished difference Result 61357 states and 75344 transitions. [2018-10-24 23:51:08,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:51:08,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 287 [2018-10-24 23:51:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:51:08,283 INFO L225 Difference]: With dead ends: 61357 [2018-10-24 23:51:08,283 INFO L226 Difference]: Without dead ends: 28044 [2018-10-24 23:51:08,350 INFO L605 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 [2018-10-24 23:51:08,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28044 states. [2018-10-24 23:51:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28044 to 23572. [2018-10-24 23:51:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23572 states. [2018-10-24 23:51:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23572 states to 23572 states and 27318 transitions. [2018-10-24 23:51:08,815 INFO L78 Accepts]: Start accepts. Automaton has 23572 states and 27318 transitions. Word has length 287 [2018-10-24 23:51:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:51:08,815 INFO L481 AbstractCegarLoop]: Abstraction has 23572 states and 27318 transitions. [2018-10-24 23:51:08,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:51:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 23572 states and 27318 transitions. [2018-10-24 23:51:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-10-24 23:51:08,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:51:08,830 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:08,831 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:51:08,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:51:08,831 INFO L82 PathProgramCache]: Analyzing trace with hash 634222945, now seen corresponding path program 1 times [2018-10-24 23:51:08,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:51:08,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:08,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:51:08,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:08,833 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:51:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:51:09,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:51:09,498 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:51:09,498 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 325 with the following transitions: [2018-10-24 23:51:09,499 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [770], [772], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [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], [1474], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:51:09,508 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:51:09,508 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:51:10,318 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:51:10,318 INFO L272 AbstractInterpreter]: Visited 139 different actions 280 times. Merged at 8 different actions 14 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-24 23:51:10,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:51:10,348 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:51:10,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:51:10,349 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:51:10,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:51:10,366 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:51:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:10,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:51:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:51:10,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:51:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:51:11,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:51:11,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-10-24 23:51:11,626 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:51:11,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 23:51:11,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 23:51:11,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-24 23:51:11,627 INFO L87 Difference]: Start difference. First operand 23572 states and 27318 transitions. Second operand 7 states. [2018-10-24 23:51:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:51:21,248 INFO L93 Difference]: Finished difference Result 71859 states and 87218 transitions. [2018-10-24 23:51:21,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 23:51:21,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 324 [2018-10-24 23:51:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:51:21,419 INFO L225 Difference]: With dead ends: 71859 [2018-10-24 23:51:21,419 INFO L226 Difference]: Without dead ends: 43185 [2018-10-24 23:51:21,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 651 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-10-24 23:51:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43185 states. [2018-10-24 23:51:22,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43185 to 40511. [2018-10-24 23:51:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40511 states. [2018-10-24 23:51:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40511 states to 40511 states and 46832 transitions. [2018-10-24 23:51:22,468 INFO L78 Accepts]: Start accepts. Automaton has 40511 states and 46832 transitions. Word has length 324 [2018-10-24 23:51:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:51:22,469 INFO L481 AbstractCegarLoop]: Abstraction has 40511 states and 46832 transitions. [2018-10-24 23:51:22,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 23:51:22,469 INFO L276 IsEmpty]: Start isEmpty. Operand 40511 states and 46832 transitions. [2018-10-24 23:51:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-10-24 23:51:22,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:51:22,486 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 23:51:22,486 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:51:22,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:51:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1770420321, now seen corresponding path program 1 times [2018-10-24 23:51:22,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:51:22,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:22,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:51:22,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:22,488 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:51:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-10-24 23:51:22,921 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:51:22,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:51:22,922 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:51:22,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:51:22,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:51:22,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:51:22,923 INFO L87 Difference]: Start difference. First operand 40511 states and 46832 transitions. Second operand 4 states. [2018-10-24 23:51:30,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:51:30,096 INFO L93 Difference]: Finished difference Result 101287 states and 118814 transitions. [2018-10-24 23:51:30,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:51:30,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 347 [2018-10-24 23:51:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:51:30,240 INFO L225 Difference]: With dead ends: 101287 [2018-10-24 23:51:30,240 INFO L226 Difference]: Without dead ends: 45419 [2018-10-24 23:51:30,350 INFO L605 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 [2018-10-24 23:51:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45419 states. [2018-10-24 23:51:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45419 to 39799. [2018-10-24 23:51:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39799 states. [2018-10-24 23:51:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39799 states to 39799 states and 46753 transitions. [2018-10-24 23:51:31,443 INFO L78 Accepts]: Start accepts. Automaton has 39799 states and 46753 transitions. Word has length 347 [2018-10-24 23:51:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:51:31,443 INFO L481 AbstractCegarLoop]: Abstraction has 39799 states and 46753 transitions. [2018-10-24 23:51:31,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:51:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 39799 states and 46753 transitions. [2018-10-24 23:51:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2018-10-24 23:51:31,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:51:31,469 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:31,470 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:51:31,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:51:31,470 INFO L82 PathProgramCache]: Analyzing trace with hash -242273385, now seen corresponding path program 1 times [2018-10-24 23:51:31,470 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:51:31,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:31,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:51:31,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:31,472 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:51:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-24 23:51:32,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:51:32,502 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:51:32,502 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 466 with the following transitions: [2018-10-24 23:51:32,503 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [274], [278], [282], [286], [297], [301], [305], [309], [313], [316], [710], [711], [718], [726], [734], [742], [750], [758], [766], [770], [772], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [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], [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], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:51:32,512 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:51:32,512 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:51:33,335 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:51:33,335 INFO L272 AbstractInterpreter]: Visited 366 different actions 728 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-24 23:51:33,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:51:33,373 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:51:33,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:51:33,374 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:51:33,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:51:33,392 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:51:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:33,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:51:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-24 23:51:34,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:51:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 31 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:51:38,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:51:38,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 17 [2018-10-24 23:51:38,075 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:51:38,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 23:51:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 23:51:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2018-10-24 23:51:38,077 INFO L87 Difference]: Start difference. First operand 39799 states and 46753 transitions. Second operand 12 states. [2018-10-24 23:51:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:51:57,798 INFO L93 Difference]: Finished difference Result 104928 states and 126290 transitions. [2018-10-24 23:51:57,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 23:51:57,798 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 465 [2018-10-24 23:51:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:51:57,952 INFO L225 Difference]: With dead ends: 104928 [2018-10-24 23:51:57,952 INFO L226 Difference]: Without dead ends: 63795 [2018-10-24 23:51:58,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 922 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2018-10-24 23:51:58,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63795 states. [2018-10-24 23:51:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63795 to 58233. [2018-10-24 23:51:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58233 states. [2018-10-24 23:51:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58233 states to 58233 states and 67662 transitions. [2018-10-24 23:51:58,967 INFO L78 Accepts]: Start accepts. Automaton has 58233 states and 67662 transitions. Word has length 465 [2018-10-24 23:51:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:51:58,968 INFO L481 AbstractCegarLoop]: Abstraction has 58233 states and 67662 transitions. [2018-10-24 23:51:58,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 23:51:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 58233 states and 67662 transitions. [2018-10-24 23:51:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-10-24 23:51:58,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:51:58,993 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:58,993 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:51:58,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:51:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash 29831411, now seen corresponding path program 1 times [2018-10-24 23:51:58,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:51:58,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:58,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:51:58,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:58,995 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:51:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2018-10-24 23:51:59,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:51:59,399 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:51:59,400 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 520 with the following transitions: [2018-10-24 23:51:59,400 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [770], [772], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1243], [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], [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], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:51:59,405 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:51:59,405 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:52:00,763 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:52:00,764 INFO L272 AbstractInterpreter]: Visited 255 different actions 774 times. Merged at 9 different actions 34 times. Widened at 1 different actions 2 times. Found 7 fixpoints after 4 different actions. Largest state had 26 variables. [2018-10-24 23:52:00,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:52:00,768 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:52:00,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:52:00,768 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:52:00,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:52:00,778 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:52:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:52:00,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:52:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-10-24 23:52:01,409 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:52:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2018-10-24 23:52:01,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-24 23:52:01,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-10-24 23:52:01,873 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:52:01,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:52:01,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:52:01,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 23:52:01,875 INFO L87 Difference]: Start difference. First operand 58233 states and 67662 transitions. Second operand 3 states. [2018-10-24 23:52:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:52:06,829 INFO L93 Difference]: Finished difference Result 128171 states and 150385 transitions. [2018-10-24 23:52:06,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:52:06,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 519 [2018-10-24 23:52:06,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:52:06,965 INFO L225 Difference]: With dead ends: 128171 [2018-10-24 23:52:06,965 INFO L226 Difference]: Without dead ends: 66013 [2018-10-24 23:52:07,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 1039 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 23:52:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66013 states. [2018-10-24 23:52:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66013 to 64708. [2018-10-24 23:52:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64708 states. [2018-10-24 23:52:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64708 states to 64708 states and 75355 transitions. [2018-10-24 23:52:07,975 INFO L78 Accepts]: Start accepts. Automaton has 64708 states and 75355 transitions. Word has length 519 [2018-10-24 23:52:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:52:07,976 INFO L481 AbstractCegarLoop]: Abstraction has 64708 states and 75355 transitions. [2018-10-24 23:52:07,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:52:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 64708 states and 75355 transitions. [2018-10-24 23:52:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2018-10-24 23:52:08,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:52:08,019 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:52:08,019 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:52:08,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:52:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2016741121, now seen corresponding path program 1 times [2018-10-24 23:52:08,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:52:08,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:52:08,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:52:08,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:52:08,021 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:52:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:52:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2018-10-24 23:52:09,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:52:09,344 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:52:09,344 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 635 with the following transitions: [2018-10-24 23:52:09,345 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [196], [199], [203], [710], [711], [718], [726], [734], [742], [750], [758], [766], [770], [772], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1243], [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], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [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], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:52:09,351 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:52:09,352 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:52:10,245 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:52:10,246 INFO L272 AbstractInterpreter]: Visited 343 different actions 686 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-24 23:52:10,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:52:10,252 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:52:10,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:52:10,252 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:52:10,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:52:10,261 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:52:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:52:10,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:52:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 452 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-24 23:52:10,815 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:52:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 74 proven. 8 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2018-10-24 23:52:11,114 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-24 23:52:11,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2018-10-24 23:52:11,115 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:52:11,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:52:11,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:52:11,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:52:11,117 INFO L87 Difference]: Start difference. First operand 64708 states and 75355 transitions. Second operand 3 states. [2018-10-24 23:52:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:52:14,093 INFO L93 Difference]: Finished difference Result 124993 states and 145252 transitions. [2018-10-24 23:52:14,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:52:14,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 634 [2018-10-24 23:52:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:52:14,219 INFO L225 Difference]: With dead ends: 124993 [2018-10-24 23:52:14,219 INFO L226 Difference]: Without dead ends: 60725 [2018-10-24 23:52:14,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1271 GetRequests, 1263 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:52:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60725 states. [2018-10-24 23:52:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60725 to 59864. [2018-10-24 23:52:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59864 states. [2018-10-24 23:52:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59864 states to 59864 states and 69240 transitions. [2018-10-24 23:52:15,078 INFO L78 Accepts]: Start accepts. Automaton has 59864 states and 69240 transitions. Word has length 634 [2018-10-24 23:52:15,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:52:15,078 INFO L481 AbstractCegarLoop]: Abstraction has 59864 states and 69240 transitions. [2018-10-24 23:52:15,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:52:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 59864 states and 69240 transitions. [2018-10-24 23:52:15,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2018-10-24 23:52:15,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:52:15,116 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:52:15,116 INFO L424 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:52:15,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:52:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1816497728, now seen corresponding path program 1 times [2018-10-24 23:52:15,117 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:52:15,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:52:15,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:52:15,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:52:15,118 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:52:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:52:16,353 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 23:52:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 69 proven. 417 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-10-24 23:52:16,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:52:16,837 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:52:16,837 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 655 with the following transitions: [2018-10-24 23:52:16,838 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [274], [278], [282], [286], [297], [301], [305], [309], [313], [316], [710], [711], [718], [726], [734], [742], [750], [758], [766], [770], [772], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [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], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [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], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:52:16,844 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:52:16,844 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:52:18,617 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:52:18,617 INFO L272 AbstractInterpreter]: Visited 368 different actions 1113 times. Merged at 9 different actions 35 times. Widened at 1 different actions 2 times. Found 7 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-24 23:52:18,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:52:18,622 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:52:18,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:52:18,622 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:52:18,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:52:18,631 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:52:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:52:18,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:52:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 466 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 23:52:19,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:52:19,596 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2018-10-24 23:52:19,962 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-10-24 23:52:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 63 proven. 423 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-10-24 23:52:21,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:52:21,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2018-10-24 23:52:21,841 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:52:21,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 23:52:21,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 23:52:21,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-10-24 23:52:21,843 INFO L87 Difference]: Start difference. First operand 59864 states and 69240 transitions. Second operand 15 states. [2018-10-24 23:52:47,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:52:47,202 INFO L93 Difference]: Finished difference Result 118076 states and 140052 transitions. [2018-10-24 23:52:47,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-24 23:52:47,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 654 [2018-10-24 23:52:47,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:52:47,370 INFO L225 Difference]: With dead ends: 118076 [2018-10-24 23:52:47,370 INFO L226 Difference]: Without dead ends: 66606 [2018-10-24 23:52:47,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1391 GetRequests, 1332 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=733, Invalid=2573, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 23:52:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66606 states. [2018-10-24 23:52:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66606 to 62077. [2018-10-24 23:52:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62077 states. [2018-10-24 23:52:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62077 states to 62077 states and 71616 transitions. [2018-10-24 23:52:48,704 INFO L78 Accepts]: Start accepts. Automaton has 62077 states and 71616 transitions. Word has length 654 [2018-10-24 23:52:48,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:52:48,704 INFO L481 AbstractCegarLoop]: Abstraction has 62077 states and 71616 transitions. [2018-10-24 23:52:48,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 23:52:48,704 INFO L276 IsEmpty]: Start isEmpty. Operand 62077 states and 71616 transitions. [2018-10-24 23:52:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2018-10-24 23:52:48,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:52:48,737 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:52:48,737 INFO L424 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:52:48,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:52:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash -385510370, now seen corresponding path program 1 times [2018-10-24 23:52:48,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:52:48,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:52:48,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:52:48,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:52:48,739 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:52:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:52:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 60 proven. 192 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2018-10-24 23:52:49,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:52:49,941 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:52:49,942 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 656 with the following transitions: [2018-10-24 23:52:49,942 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [274], [278], [282], [286], [297], [301], [305], [309], [313], [316], [710], [711], [718], [726], [734], [742], [750], [758], [766], [770], [772], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [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], [1356], [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], [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], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:52:49,948 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:52:49,949 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:52:51,987 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:52:51,987 INFO L272 AbstractInterpreter]: Visited 368 different actions 1115 times. Merged at 9 different actions 37 times. Widened at 1 different actions 3 times. Found 7 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-24 23:52:51,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:52:51,994 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:52:51,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:52:51,994 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:52:52,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:52:52,003 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:52:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:52:52,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:53:07,948 WARN L179 SmtUtils]: Spent 13.26 s on a formula simplification. DAG size of input: 120 DAG size of output: 48 [2018-10-24 23:53:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-24 23:53:08,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:53:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-24 23:53:09,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:53:09,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 15 [2018-10-24 23:53:09,980 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:53:09,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 23:53:09,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 23:53:09,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=167, Unknown=1, NotChecked=0, Total=210 [2018-10-24 23:53:09,982 INFO L87 Difference]: Start difference. First operand 62077 states and 71616 transitions. Second operand 13 states. Received shutdown request... [2018-10-24 23:53:12,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 23:53:12,589 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 23:53:12,594 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 23:53:12,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:53:12 BoogieIcfgContainer [2018-10-24 23:53:12,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 23:53:12,596 INFO L168 Benchmark]: Toolchain (without parser) took 228775.69 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.7 GB). Peak memory consumption was 671.3 MB. Max. memory is 7.1 GB. [2018-10-24 23:53:12,597 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 23:53:12,598 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1534.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-24 23:53:12,598 INFO L168 Benchmark]: Boogie Procedure Inliner took 551.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 764.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -916.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-24 23:53:12,599 INFO L168 Benchmark]: Boogie Preprocessor took 277.09 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-10-24 23:53:12,600 INFO L168 Benchmark]: RCFGBuilder took 12334.55 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 463.1 MB). Peak memory consumption was 463.1 MB. Max. memory is 7.1 GB. [2018-10-24 23:53:12,601 INFO L168 Benchmark]: TraceAbstraction took 214069.07 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 3.0 GB in the end (delta: -1.4 GB). Peak memory consumption was 193.9 MB. Max. memory is 7.1 GB. [2018-10-24 23:53:12,606 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1534.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 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 551.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 764.9 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -916.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 277.09 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12334.55 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 463.1 MB). Peak memory consumption was 463.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214069.07 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 3.0 GB in the end (delta: -1.4 GB). Peak memory consumption was 193.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 47). Cancelled while BasicCegarLoop was constructing difference of abstraction (62077states) and FLOYD_HOARE automaton (currently 5 states, 13 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 16 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 213.9s OverallTime, 14 OverallIterations, 5 TraceHistogramMax, 150.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4838 SDtfs, 24658 SDslu, 3765 SDs, 0 SdLazy, 50355 SolverSat, 10011 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 128.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7976 GetRequests, 7783 SyntacticMatches, 26 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 28.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64708occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.6s AbstIntTime, 9 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.9s AutomataMinimizationTime, 13 MinimizatonAttempts, 27343 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 38.8s InterpolantComputationTime, 8605 NumberOfCodeBlocks, 8605 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 12449 ConstructedInterpolants, 198 QuantifiedInterpolants, 22693535 SizeOfPredicates, 15 NumberOfNonLiveVariables, 6090 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 32 InterpolantComputations, 9 PerfectInterpolantSequences, 8860/10041 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown