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-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label32_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:59:14,821 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:59:14,823 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:59:14,837 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:59:14,837 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:59:14,838 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:59:14,840 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:59:14,842 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:59:14,843 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:59:14,844 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:59:14,845 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:59:14,846 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:59:14,847 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:59:14,848 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:59:14,849 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:59:14,850 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:59:14,851 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:59:14,853 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:59:14,855 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:59:14,856 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:59:14,858 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:59:14,859 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:59:14,862 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:59:14,862 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:59:14,862 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:59:14,863 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:59:14,864 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:59:14,865 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:59:14,866 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:59:14,867 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:59:14,868 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:59:14,868 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 14:59:14,869 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:59:14,869 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:59:14,870 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:59:14,871 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:59:14,871 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 14:59:14,902 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:59:14,903 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:59:14,904 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:59:14,904 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:59:14,904 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:59:14,904 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:59:14,905 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:59:14,905 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:59:14,905 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:59:14,906 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:59:14,906 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:59:14,906 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:59:14,907 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:59:14,907 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:59:14,907 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:59:14,907 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:59:14,908 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:59:14,908 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:59:14,908 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:59:14,908 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:59:14,909 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:59:14,909 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:59:14,909 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:59:14,909 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:59:14,909 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:59:14,910 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:59:14,911 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:59:14,911 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:59:14,911 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:59:14,911 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:59:14,912 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:59:14,912 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:59:14,912 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:59:14,912 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:59:14,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:59:14,994 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:59:14,998 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:59:15,000 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:59:15,000 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:59:15,001 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label32_true-unreach-call.c [2018-10-27 14:59:15,067 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ac634fcb3/d1c129cc11864ad68baa76f7c3584947/FLAGd4901e0c5 [2018-10-27 14:59:15,767 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:59:15,768 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label32_true-unreach-call.c [2018-10-27 14:59:15,796 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ac634fcb3/d1c129cc11864ad68baa76f7c3584947/FLAGd4901e0c5 [2018-10-27 14:59:15,814 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ac634fcb3/d1c129cc11864ad68baa76f7c3584947 [2018-10-27 14:59:15,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:59:15,830 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:59:15,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:59:15,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:59:15,835 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:59:15,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:59:15" (1/1) ... [2018-10-27 14:59:15,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@540df47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:15, skipping insertion in model container [2018-10-27 14:59:15,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:59:15" (1/1) ... [2018-10-27 14:59:15,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:59:15,954 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:59:17,053 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:59:17,058 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:59:17,553 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:59:17,580 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:59:17,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17 WrapperNode [2018-10-27 14:59:17,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:59:17,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:59:17,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:59:17,582 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:59:17,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (1/1) ... [2018-10-27 14:59:17,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (1/1) ... [2018-10-27 14:59:18,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:59:18,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:59:18,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:59:18,078 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:59:18,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (1/1) ... [2018-10-27 14:59:18,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (1/1) ... [2018-10-27 14:59:18,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (1/1) ... [2018-10-27 14:59:18,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (1/1) ... [2018-10-27 14:59:18,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (1/1) ... [2018-10-27 14:59:18,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (1/1) ... [2018-10-27 14:59:18,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (1/1) ... [2018-10-27 14:59:18,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:59:18,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:59:18,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:59:18,399 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:59:18,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (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 [2018-10-27 14:59:18,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:59:18,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:59:18,473 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 14:59:18,473 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 14:59:18,473 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:59:18,473 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:59:18,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:59:18,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:59:18,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:59:18,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:59:33,536 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:59:33,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:59:33 BoogieIcfgContainer [2018-10-27 14:59:33,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:59:33,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:59:33,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:59:33,542 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:59:33,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:59:15" (1/3) ... [2018-10-27 14:59:33,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efd57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:59:33, skipping insertion in model container [2018-10-27 14:59:33,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:59:17" (2/3) ... [2018-10-27 14:59:33,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efd57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:59:33, skipping insertion in model container [2018-10-27 14:59:33,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:59:33" (3/3) ... [2018-10-27 14:59:33,546 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label32_true-unreach-call.c [2018-10-27 14:59:33,556 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:59:33,568 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:59:33,586 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:59:33,629 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:59:33,629 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:59:33,629 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:59:33,629 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:59:33,630 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:59:33,630 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:59:33,630 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:59:33,630 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:59:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 14:59:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-27 14:59:33,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:59:33,678 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:59:33,681 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:59:33,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:59:33,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1058838858, now seen corresponding path program 1 times [2018-10-27 14:59:33,690 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:59:33,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:33,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:59:33,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:33,745 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:59:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:59:34,243 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-27 14:59:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:59:34,258 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:59:34,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:59:34,259 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:59:34,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:59:34,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:59:34,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:59:34,285 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 14:59:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:59:45,938 INFO L93 Difference]: Finished difference Result 2118 states and 3937 transitions. [2018-10-27 14:59:45,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:59:45,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-10-27 14:59:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:59:45,977 INFO L225 Difference]: With dead ends: 2118 [2018-10-27 14:59:45,978 INFO L226 Difference]: Without dead ends: 1508 [2018-10-27 14:59:45,991 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 [2018-10-27 14:59:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2018-10-27 14:59:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1039. [2018-10-27 14:59:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2018-10-27 14:59:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1596 transitions. [2018-10-27 14:59:46,156 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1596 transitions. Word has length 55 [2018-10-27 14:59:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:59:46,157 INFO L481 AbstractCegarLoop]: Abstraction has 1039 states and 1596 transitions. [2018-10-27 14:59:46,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:59:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1596 transitions. [2018-10-27 14:59:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-27 14:59:46,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:59:46,170 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:59:46,171 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:59:46,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:59:46,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1690523775, now seen corresponding path program 1 times [2018-10-27 14:59:46,171 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:59:46,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:46,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:59:46,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:46,174 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:59:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:59:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:59:46,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:59:46,894 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:59:46,895 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 131 with the following transitions: [2018-10-27 14:59:46,897 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1050], [1052], [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], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:59:46,955 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:59:46,956 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:59:47,432 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:59:50,130 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:59:50,132 INFO L272 AbstractInterpreter]: Visited 83 different actions 467 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:59:50,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:59:50,178 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:59:50,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:59:50,178 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 [2018-10-27 14:59:50,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:59:50,193 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:59:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:59:50,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:00:18,911 WARN L179 SmtUtils]: Spent 24.25 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-27 15:00:39,254 WARN L179 SmtUtils]: Spent 16.13 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-10-27 15:00:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:00:39,860 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 15:00:44,215 WARN L179 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-27 15:00:44,270 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-27 15:00:47,148 WARN L179 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-27 15:00:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:00:47,530 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 15:00:47,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-27 15:00:47,531 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:00:47,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 15:00:47,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 15:00:47,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=160, Unknown=5, NotChecked=0, Total=210 [2018-10-27 15:00:47,533 INFO L87 Difference]: Start difference. First operand 1039 states and 1596 transitions. Second operand 6 states. [2018-10-27 15:01:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:01:59,256 INFO L93 Difference]: Finished difference Result 3901 states and 6145 transitions. [2018-10-27 15:01:59,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 15:01:59,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2018-10-27 15:01:59,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:01:59,277 INFO L225 Difference]: With dead ends: 3901 [2018-10-27 15:01:59,278 INFO L226 Difference]: Without dead ends: 2868 [2018-10-27 15:01:59,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=45, Invalid=160, Unknown=5, NotChecked=0, Total=210 [2018-10-27 15:01:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2018-10-27 15:01:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2839. [2018-10-27 15:01:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2839 states. [2018-10-27 15:01:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 4215 transitions. [2018-10-27 15:01:59,390 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 4215 transitions. Word has length 130 [2018-10-27 15:01:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:01:59,391 INFO L481 AbstractCegarLoop]: Abstraction has 2839 states and 4215 transitions. [2018-10-27 15:01:59,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 15:01:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 4215 transitions. [2018-10-27 15:01:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-27 15:01:59,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:01:59,409 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:01:59,409 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:01:59,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:01:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1567695546, now seen corresponding path program 1 times [2018-10-27 15:01:59,410 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:01:59,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:01:59,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:01:59,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:01:59,414 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:01:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:01:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:01:59,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:01:59,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 15:01:59,723 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:01:59,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 15:01:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 15:01:59,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 15:01:59,724 INFO L87 Difference]: Start difference. First operand 2839 states and 4215 transitions. Second operand 4 states. [2018-10-27 15:02:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:02:08,419 INFO L93 Difference]: Finished difference Result 10468 states and 16151 transitions. [2018-10-27 15:02:08,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 15:02:08,419 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2018-10-27 15:02:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:02:08,467 INFO L225 Difference]: With dead ends: 10468 [2018-10-27 15:02:08,467 INFO L226 Difference]: Without dead ends: 7635 [2018-10-27 15:02:08,493 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 [2018-10-27 15:02:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7635 states. [2018-10-27 15:02:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7635 to 7633. [2018-10-27 15:02:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7633 states. [2018-10-27 15:02:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7633 states to 7633 states and 10984 transitions. [2018-10-27 15:02:08,691 INFO L78 Accepts]: Start accepts. Automaton has 7633 states and 10984 transitions. Word has length 165 [2018-10-27 15:02:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:02:08,692 INFO L481 AbstractCegarLoop]: Abstraction has 7633 states and 10984 transitions. [2018-10-27 15:02:08,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 15:02:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 7633 states and 10984 transitions. [2018-10-27 15:02:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-27 15:02:08,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:02:08,698 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:02:08,698 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:02:08,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:02:08,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1014156896, now seen corresponding path program 1 times [2018-10-27 15:02:08,699 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:02:08,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:02:08,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:02:08,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:02:08,700 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:02:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:02:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:02:08,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:02:08,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 15:02:08,971 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:02:08,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 15:02:08,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 15:02:08,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 15:02:08,973 INFO L87 Difference]: Start difference. First operand 7633 states and 10984 transitions. Second operand 5 states. [2018-10-27 15:02:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:02:31,517 INFO L93 Difference]: Finished difference Result 23765 states and 35975 transitions. [2018-10-27 15:02:31,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 15:02:31,520 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 193 [2018-10-27 15:02:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:02:31,597 INFO L225 Difference]: With dead ends: 23765 [2018-10-27 15:02:31,597 INFO L226 Difference]: Without dead ends: 16138 [2018-10-27 15:02:31,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 15:02:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2018-10-27 15:02:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16104. [2018-10-27 15:02:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16104 states. [2018-10-27 15:02:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16104 states to 16104 states and 22435 transitions. [2018-10-27 15:02:32,048 INFO L78 Accepts]: Start accepts. Automaton has 16104 states and 22435 transitions. Word has length 193 [2018-10-27 15:02:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:02:32,049 INFO L481 AbstractCegarLoop]: Abstraction has 16104 states and 22435 transitions. [2018-10-27 15:02:32,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 15:02:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 16104 states and 22435 transitions. [2018-10-27 15:02:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-27 15:02:32,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:02:32,058 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:02:32,059 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:02:32,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:02:32,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1601373575, now seen corresponding path program 1 times [2018-10-27 15:02:32,060 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:02:32,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:02:32,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:02:32,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:02:32,061 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:02:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:02:32,344 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 15:02:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 97 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-27 15:02:32,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:02:32,642 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:02:32,642 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2018-10-27 15:02:32,643 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1050], [1052], [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], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1286], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 15:02:32,647 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 15:02:32,647 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 15:02:32,799 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 15:02:34,799 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 15:02:34,799 INFO L272 AbstractInterpreter]: Visited 98 different actions 557 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 15:02:34,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:02:34,838 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 15:02:34,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:02:34,838 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 [2018-10-27 15:02:34,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:02:34,849 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 15:02:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:02:34,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:02:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:02:35,189 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 15:02:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:02:35,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 15:02:35,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 15:02:35,522 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 15:02:35,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 15:02:35,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 15:02:35,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-27 15:02:35,523 INFO L87 Difference]: Start difference. First operand 16104 states and 22435 transitions. Second operand 9 states. [2018-10-27 15:02:43,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:02:43,209 INFO L93 Difference]: Finished difference Result 32479 states and 45572 transitions. [2018-10-27 15:02:43,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 15:02:43,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 219 [2018-10-27 15:02:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:02:43,257 INFO L225 Difference]: With dead ends: 32479 [2018-10-27 15:02:43,257 INFO L226 Difference]: Without dead ends: 13705 [2018-10-27 15:02:43,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 436 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-10-27 15:02:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13705 states. [2018-10-27 15:02:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13705 to 13187. [2018-10-27 15:02:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13187 states. [2018-10-27 15:02:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13187 states to 13187 states and 15072 transitions. [2018-10-27 15:02:43,579 INFO L78 Accepts]: Start accepts. Automaton has 13187 states and 15072 transitions. Word has length 219 [2018-10-27 15:02:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:02:43,579 INFO L481 AbstractCegarLoop]: Abstraction has 13187 states and 15072 transitions. [2018-10-27 15:02:43,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 15:02:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 13187 states and 15072 transitions. [2018-10-27 15:02:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-27 15:02:43,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:02:43,592 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 15:02:43,593 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:02:43,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:02:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1410497229, now seen corresponding path program 1 times [2018-10-27 15:02:43,593 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:02:43,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:02:43,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:02:43,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:02:43,595 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:02:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:02:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 15:02:43,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:02:43,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 15:02:43,926 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:02:43,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 15:02:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 15:02:43,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 15:02:43,927 INFO L87 Difference]: Start difference. First operand 13187 states and 15072 transitions. Second operand 4 states. [2018-10-27 15:02:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:02:51,489 INFO L93 Difference]: Finished difference Result 41561 states and 49111 transitions. [2018-10-27 15:02:51,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 15:02:51,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 232 [2018-10-27 15:02:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:02:51,573 INFO L225 Difference]: With dead ends: 41561 [2018-10-27 15:02:51,573 INFO L226 Difference]: Without dead ends: 28380 [2018-10-27 15:02:51,606 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 [2018-10-27 15:02:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28380 states. [2018-10-27 15:02:52,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28380 to 27932. [2018-10-27 15:02:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27932 states. [2018-10-27 15:02:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27932 states to 27932 states and 32478 transitions. [2018-10-27 15:02:52,131 INFO L78 Accepts]: Start accepts. Automaton has 27932 states and 32478 transitions. Word has length 232 [2018-10-27 15:02:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:02:52,132 INFO L481 AbstractCegarLoop]: Abstraction has 27932 states and 32478 transitions. [2018-10-27 15:02:52,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 15:02:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 27932 states and 32478 transitions. [2018-10-27 15:02:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-10-27 15:02:52,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:02:52,144 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 15:02:52,145 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:02:52,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:02:52,145 INFO L82 PathProgramCache]: Analyzing trace with hash 73656625, now seen corresponding path program 1 times [2018-10-27 15:02:52,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:02:52,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:02:52,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:02:52,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:02:52,147 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:02:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:02:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-27 15:02:52,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:02:52,886 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:02:52,886 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 282 with the following transitions: [2018-10-27 15:02:52,887 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1050], [1052], [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], [1531], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 15:02:52,897 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 15:02:52,897 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 15:02:52,986 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 15:02:56,945 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 15:02:56,946 INFO L272 AbstractInterpreter]: Visited 147 different actions 578 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 15:02:56,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:02:56,984 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 15:02:56,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:02:56,984 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 [2018-10-27 15:02:56,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:02:56,997 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 15:02:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:02:57,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:02:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-27 15:02:57,349 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 15:02:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 101 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:02:58,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 15:02:58,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-10-27 15:02:58,246 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 15:02:58,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 15:02:58,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 15:02:58,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-10-27 15:02:58,249 INFO L87 Difference]: Start difference. First operand 27932 states and 32478 transitions. Second operand 9 states. [2018-10-27 15:03:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:03:19,961 INFO L93 Difference]: Finished difference Result 85559 states and 104558 transitions. [2018-10-27 15:03:19,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-27 15:03:19,963 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 281 [2018-10-27 15:03:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:03:20,115 INFO L225 Difference]: With dead ends: 85559 [2018-10-27 15:03:20,115 INFO L226 Difference]: Without dead ends: 52523 [2018-10-27 15:03:20,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 556 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2018-10-27 15:03:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52523 states. [2018-10-27 15:03:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52523 to 51721. [2018-10-27 15:03:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51721 states. [2018-10-27 15:03:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51721 states to 51721 states and 60494 transitions. [2018-10-27 15:03:21,255 INFO L78 Accepts]: Start accepts. Automaton has 51721 states and 60494 transitions. Word has length 281 [2018-10-27 15:03:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:03:21,256 INFO L481 AbstractCegarLoop]: Abstraction has 51721 states and 60494 transitions. [2018-10-27 15:03:21,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 15:03:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 51721 states and 60494 transitions. [2018-10-27 15:03:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-10-27 15:03:21,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:03:21,274 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:03:21,274 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:03:21,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:03:21,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1662736913, now seen corresponding path program 1 times [2018-10-27 15:03:21,275 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:03:21,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:03:21,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:03:21,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:03:21,276 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:03:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:03:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 150 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-27 15:03:21,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:03:21,926 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:03:21,926 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 390 with the following transitions: [2018-10-27 15:03:21,927 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1050], [1052], [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], [1376], [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], [1531], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 15:03:21,935 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 15:03:21,935 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 15:03:22,211 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-10-27 15:03:22,419 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-27 15:03:22,420 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-27 15:03:22,420 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 15:03:22,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:03:22,420 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 [2018-10-27 15:03:22,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:03:22,431 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 15:03:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:03:22,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:03:22,561 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-27 15:03:22,762 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 15:03:22,762 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 15:03:22,767 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 15:03:22,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 03:03:22 BoogieIcfgContainer [2018-10-27 15:03:22,767 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 15:03:22,768 INFO L168 Benchmark]: Toolchain (without parser) took 246939.57 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 350.0 MB. Max. memory is 7.1 GB. [2018-10-27 15:03:22,769 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 15:03:22,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1749.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-27 15:03:22,771 INFO L168 Benchmark]: Boogie Procedure Inliner took 495.72 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 782.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -930.6 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-27 15:03:22,772 INFO L168 Benchmark]: Boogie Preprocessor took 321.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2018-10-27 15:03:22,772 INFO L168 Benchmark]: RCFGBuilder took 15139.05 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 461.0 MB). Peak memory consumption was 461.0 MB. Max. memory is 7.1 GB. [2018-10-27 15:03:22,773 INFO L168 Benchmark]: TraceAbstraction took 229228.54 ms. Allocated memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: 1.3 GB). Free memory was 1.7 GB in the beginning and 3.2 GB in the end (delta: -1.5 GB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 15:03:22,779 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1749.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 495.72 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 782.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -930.6 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 321.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 15139.05 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 461.0 MB). Peak memory consumption was 461.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 229228.54 ms. Allocated memory was 2.3 GB in the beginning and 3.7 GB in the end (delta: 1.3 GB). Free memory was 1.7 GB in the beginning and 3.2 GB in the end (delta: -1.5 GB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 152]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 152). Cancelled while BasicCegarLoop was analyzing trace of length 390 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 229.1s OverallTime, 8 OverallIterations, 4 TraceHistogramMax, 152.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2695 SDtfs, 14880 SDslu, 2198 SDs, 0 SdLazy, 26600 SolverSat, 7529 SolverUnsat, 21 SolverUnknown, 0 SolverNotchecked, 140.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1330 GetRequests, 1259 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 58.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51721occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.0s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 7 MinimizatonAttempts, 2302 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 61.5s InterpolantComputationTime, 1905 NumberOfCodeBlocks, 1905 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 2522 ConstructedInterpolants, 222 QuantifiedInterpolants, 3705520 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1171 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 1301/1489 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown