./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f612eebc128d68e9b4bc81ed92184f640c3b9bd4 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-91b1670 [2018-11-28 18:52:31,785 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:52:31,787 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:52:31,804 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:52:31,804 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:52:31,805 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:52:31,807 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:52:31,809 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:52:31,810 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:52:31,812 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:52:31,812 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:52:31,813 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:52:31,814 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:52:31,815 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:52:31,816 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:52:31,817 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:52:31,818 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:52:31,820 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:52:31,823 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:52:31,824 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:52:31,826 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:52:31,827 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:52:31,830 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:52:31,830 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:52:31,830 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:52:31,831 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:52:31,832 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:52:31,834 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:52:31,835 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:52:31,836 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:52:31,836 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:52:31,837 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:52:31,837 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:52:31,837 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:52:31,839 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:52:31,840 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:52:31,840 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:52:31,856 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:52:31,856 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:52:31,857 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:52:31,857 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:52:31,857 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:52:31,858 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:52:31,858 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:52:31,859 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:52:31,859 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:52:31,859 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:52:31,859 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:52:31,859 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:52:31,860 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:52:31,860 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:52:31,860 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:52:31,860 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:52:31,860 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:52:31,860 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:52:31,862 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:52:31,862 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:52:31,862 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:52:31,863 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:52:31,863 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:52:31,863 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:52:31,863 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:52:31,863 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:52:31,863 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:52:31,865 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:52:31,865 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:52:31,865 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:52:31,865 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f612eebc128d68e9b4bc81ed92184f640c3b9bd4 [2018-11-28 18:52:31,923 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:52:31,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:52:31,944 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:52:31,946 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:52:31,947 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:52:31,948 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c [2018-11-28 18:52:32,017 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a75265ad/e310ef4250ab44ebb14836776789da8e/FLAGe7a8ebcf4 [2018-11-28 18:52:32,517 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:52:32,518 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c [2018-11-28 18:52:32,526 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a75265ad/e310ef4250ab44ebb14836776789da8e/FLAGe7a8ebcf4 [2018-11-28 18:52:32,873 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a75265ad/e310ef4250ab44ebb14836776789da8e [2018-11-28 18:52:32,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:52:32,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:52:32,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:52:32,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:52:32,885 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:52:32,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:52:32" (1/1) ... [2018-11-28 18:52:32,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d4de197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:32, skipping insertion in model container [2018-11-28 18:52:32,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:52:32" (1/1) ... [2018-11-28 18:52:32,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:52:32,916 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:52:33,109 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:52:33,114 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:52:33,130 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:52:33,142 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:52:33,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33 WrapperNode [2018-11-28 18:52:33,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:52:33,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:52:33,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:52:33,144 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:52:33,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (1/1) ... [2018-11-28 18:52:33,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (1/1) ... [2018-11-28 18:52:33,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:52:33,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:52:33,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:52:33,170 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:52:33,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (1/1) ... [2018-11-28 18:52:33,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (1/1) ... [2018-11-28 18:52:33,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (1/1) ... [2018-11-28 18:52:33,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (1/1) ... [2018-11-28 18:52:33,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (1/1) ... [2018-11-28 18:52:33,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (1/1) ... [2018-11-28 18:52:33,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (1/1) ... [2018-11-28 18:52:33,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:52:33,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:52:33,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:52:33,199 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:52:33,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:52:33,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:52:33,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:52:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:52:33,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:52:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:52:33,328 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:52:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-28 18:52:33,328 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-28 18:52:33,550 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:52:33,550 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:52:33,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:33 BoogieIcfgContainer [2018-11-28 18:52:33,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:52:33,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:52:33,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:52:33,558 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:52:33,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:52:32" (1/3) ... [2018-11-28 18:52:33,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23452776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:33, skipping insertion in model container [2018-11-28 18:52:33,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:52:33" (2/3) ... [2018-11-28 18:52:33,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23452776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:52:33, skipping insertion in model container [2018-11-28 18:52:33,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:33" (3/3) ... [2018-11-28 18:52:33,564 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_7_true-unreach-call_true-termination.c [2018-11-28 18:52:33,578 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:52:33,587 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:52:33,629 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:52:33,688 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:52:33,689 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:52:33,689 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:52:33,689 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:52:33,689 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:52:33,690 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:52:33,690 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:52:33,690 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:52:33,690 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:52:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-28 18:52:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:52:33,721 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:33,723 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:33,726 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:33,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:33,738 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-28 18:52:33,740 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:33,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:33,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:33,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:33,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:52:33,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:33,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:33,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:33,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:33,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:33,964 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-28 18:52:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:34,118 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-28 18:52:34,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:34,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:52:34,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:34,132 INFO L225 Difference]: With dead ends: 35 [2018-11-28 18:52:34,133 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 18:52:34,136 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:34,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 18:52:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 18:52:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:52:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 18:52:34,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-28 18:52:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:34,185 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 18:52:34,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 18:52:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 18:52:34,188 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:34,188 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:34,188 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:34,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-28 18:52:34,189 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:34,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:34,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:34,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:34,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:52:34,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:52:34,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:52:34,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:52:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:52:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:52:34,430 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-28 18:52:34,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:34,647 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-28 18:52:34,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:52:34,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 18:52:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:34,650 INFO L225 Difference]: With dead ends: 27 [2018-11-28 18:52:34,650 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 18:52:34,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:34,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 18:52:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 18:52:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:52:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 18:52:34,660 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-28 18:52:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:34,661 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 18:52:34,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:52:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 18:52:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 18:52:34,664 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:34,664 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:34,664 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:34,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:34,665 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-28 18:52:34,665 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:34,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:34,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:34,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:34,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 18:52:34,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:34,973 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:34,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:35,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 18:52:35,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:35,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-28 18:52:35,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:52:35,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:52:35,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:52:35,163 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-28 18:52:35,375 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-11-28 18:52:35,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:35,497 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-28 18:52:35,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:52:35,500 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-28 18:52:35,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:35,501 INFO L225 Difference]: With dead ends: 38 [2018-11-28 18:52:35,501 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 18:52:35,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 18:52:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 18:52:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 18:52:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-28 18:52:35,517 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-28 18:52:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:35,518 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-28 18:52:35,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:52:35,518 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-28 18:52:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 18:52:35,522 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:35,522 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:35,522 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:35,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:35,523 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-28 18:52:35,523 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:35,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:35,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:35,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:35,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 18:52:35,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:35,662 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:35,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:35,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 18:52:35,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:35,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 18:52:35,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:52:35,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:52:35,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:52:35,754 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-28 18:52:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:36,018 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-28 18:52:36,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:52:36,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-28 18:52:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:36,022 INFO L225 Difference]: With dead ends: 32 [2018-11-28 18:52:36,022 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 18:52:36,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:52:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 18:52:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 18:52:36,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 18:52:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-28 18:52:36,034 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-28 18:52:36,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:36,035 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-28 18:52:36,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:52:36,036 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-28 18:52:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 18:52:36,040 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:36,041 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:36,041 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:36,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-28 18:52:36,042 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:36,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:36,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:36,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:36,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 18:52:36,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:36,279 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:36,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:36,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:36,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:36,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-28 18:52:36,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:36,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-28 18:52:36,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:52:36,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:52:36,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:52:36,530 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-28 18:52:36,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:36,706 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-28 18:52:36,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:52:36,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-28 18:52:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:36,711 INFO L225 Difference]: With dead ends: 40 [2018-11-28 18:52:36,711 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 18:52:36,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 18:52:36,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-28 18:52:36,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 18:52:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-28 18:52:36,724 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-28 18:52:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:36,725 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-28 18:52:36,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:52:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-28 18:52:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 18:52:36,729 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:36,729 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:36,730 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:36,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-28 18:52:36,730 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:36,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:36,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:36,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:36,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-28 18:52:37,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:37,210 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-11-28 18:52:37,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:37,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 18:52:37,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:37,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-28 18:52:37,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:37,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-28 18:52:37,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 18:52:37,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 18:52:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:37,380 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-28 18:52:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:37,955 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-28 18:52:37,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:52:37,957 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-28 18:52:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:37,960 INFO L225 Difference]: With dead ends: 76 [2018-11-28 18:52:37,960 INFO L226 Difference]: Without dead ends: 49 [2018-11-28 18:52:37,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-28 18:52:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-28 18:52:37,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-28 18:52:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 18:52:37,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-28 18:52:37,976 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-28 18:52:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:37,977 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-28 18:52:37,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 18:52:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-28 18:52:37,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-28 18:52:37,979 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:37,979 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:37,980 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:37,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:37,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2018-11-28 18:52:37,980 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:37,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:37,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:37,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:37,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-28 18:52:38,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:38,101 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:52:38,111 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:52:38,147 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:52:38,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:38,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-28 18:52:38,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:38,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-11-28 18:52:38,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:52:38,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:52:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:52:38,249 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-11-28 18:52:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:38,575 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-11-28 18:52:38,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:52:38,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2018-11-28 18:52:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:38,579 INFO L225 Difference]: With dead ends: 52 [2018-11-28 18:52:38,579 INFO L226 Difference]: Without dead ends: 48 [2018-11-28 18:52:38,580 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:52:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-28 18:52:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-28 18:52:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 18:52:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-11-28 18:52:38,591 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 68 [2018-11-28 18:52:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:38,592 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-11-28 18:52:38,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:52:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-11-28 18:52:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-11-28 18:52:38,595 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:38,595 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:38,596 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:38,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:38,596 INFO L82 PathProgramCache]: Analyzing trace with hash 702878917, now seen corresponding path program 5 times [2018-11-28 18:52:38,596 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:38,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:38,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:38,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:38,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 213 proven. 64 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-11-28 18:52:38,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:38,758 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:52:38,769 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:52:38,841 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 18:52:38,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:38,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 422 proven. 118 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2018-11-28 18:52:39,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:39,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2018-11-28 18:52:39,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 18:52:39,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 18:52:39,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-11-28 18:52:39,014 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 13 states. [2018-11-28 18:52:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:39,642 INFO L93 Difference]: Finished difference Result 111 states and 206 transitions. [2018-11-28 18:52:39,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 18:52:39,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-11-28 18:52:39,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:39,646 INFO L225 Difference]: With dead ends: 111 [2018-11-28 18:52:39,646 INFO L226 Difference]: Without dead ends: 69 [2018-11-28 18:52:39,649 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:52:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-28 18:52:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-11-28 18:52:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-28 18:52:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2018-11-28 18:52:39,660 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 123 [2018-11-28 18:52:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:39,660 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2018-11-28 18:52:39,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 18:52:39,661 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2018-11-28 18:52:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-28 18:52:39,663 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:39,664 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:39,664 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:39,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 6 times [2018-11-28 18:52:39,664 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:39,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:39,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:39,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:39,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 328 proven. 115 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2018-11-28 18:52:39,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:39,866 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:52:39,876 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:52:40,126 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-11-28 18:52:40,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:40,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 202 proven. 241 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2018-11-28 18:52:40,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:40,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 18:52:40,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:52:40,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:52:40,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:52:40,250 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 9 states. [2018-11-28 18:52:40,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:40,508 INFO L93 Difference]: Finished difference Result 80 states and 109 transitions. [2018-11-28 18:52:40,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 18:52:40,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 177 [2018-11-28 18:52:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:40,512 INFO L225 Difference]: With dead ends: 80 [2018-11-28 18:52:40,512 INFO L226 Difference]: Without dead ends: 76 [2018-11-28 18:52:40,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-28 18:52:40,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2018-11-28 18:52:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-28 18:52:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2018-11-28 18:52:40,537 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 177 [2018-11-28 18:52:40,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:40,538 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2018-11-28 18:52:40,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:52:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2018-11-28 18:52:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-11-28 18:52:40,551 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:40,551 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 43, 26, 26, 26, 26, 26, 26, 26, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:40,551 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:40,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:40,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1341952681, now seen corresponding path program 7 times [2018-11-28 18:52:40,552 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:40,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:40,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:40,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:40,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 1191 proven. 447 refuted. 0 times theorem prover too weak. 6077 trivial. 0 not checked. [2018-11-28 18:52:40,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:40,979 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:52:40,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:41,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 670 proven. 963 refuted. 0 times theorem prover too weak. 6082 trivial. 0 not checked. [2018-11-28 18:52:41,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:41,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2018-11-28 18:52:41,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 18:52:41,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 18:52:41,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-11-28 18:52:41,356 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand 15 states. [2018-11-28 18:52:41,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:41,899 INFO L93 Difference]: Finished difference Result 117 states and 218 transitions. [2018-11-28 18:52:41,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 18:52:41,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 368 [2018-11-28 18:52:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:41,901 INFO L225 Difference]: With dead ends: 117 [2018-11-28 18:52:41,902 INFO L226 Difference]: Without dead ends: 74 [2018-11-28 18:52:41,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-11-28 18:52:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-28 18:52:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-11-28 18:52:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-28 18:52:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2018-11-28 18:52:41,913 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 368 [2018-11-28 18:52:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:41,914 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2018-11-28 18:52:41,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 18:52:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2018-11-28 18:52:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-11-28 18:52:41,918 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:41,918 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:41,919 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:41,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:41,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2018-11-28 18:52:41,919 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:41,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:41,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:41,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:52:41,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2018-11-28 18:52:42,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:42,855 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-28 18:52:42,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:52:42,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:52:42,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:42,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2018-11-28 18:52:44,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:44,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2018-11-28 18:52:44,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 18:52:44,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 18:52:44,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:52:44,037 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 28 states. [2018-11-28 18:52:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:44,470 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2018-11-28 18:52:44,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 18:52:44,471 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 286 [2018-11-28 18:52:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:44,474 INFO L225 Difference]: With dead ends: 81 [2018-11-28 18:52:44,475 INFO L226 Difference]: Without dead ends: 74 [2018-11-28 18:52:44,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 323 SyntacticMatches, 21 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2018-11-28 18:52:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-28 18:52:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-11-28 18:52:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-28 18:52:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2018-11-28 18:52:44,484 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 286 [2018-11-28 18:52:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:44,485 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2018-11-28 18:52:44,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 18:52:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2018-11-28 18:52:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-11-28 18:52:44,487 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:52:44,487 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 31, 19, 19, 19, 19, 19, 19, 19, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:52:44,488 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:52:44,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:52:44,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1077839486, now seen corresponding path program 9 times [2018-11-28 18:52:44,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:52:44,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:52:44,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:44,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:52:44,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:52:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:52:45,058 WARN L180 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-11-28 18:52:45,336 WARN L180 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-11-28 18:52:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 999 proven. 122 refuted. 0 times theorem prover too weak. 2992 trivial. 0 not checked. [2018-11-28 18:52:45,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:52:45,421 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:52:45,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:52:45,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-28 18:52:45,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:52:45,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:52:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 990 proven. 73 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2018-11-28 18:52:45,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:52:45,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2018-11-28 18:52:45,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 18:52:45,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 18:52:45,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:52:45,654 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 14 states. [2018-11-28 18:52:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:52:46,092 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2018-11-28 18:52:46,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 18:52:46,093 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 272 [2018-11-28 18:52:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:52:46,096 INFO L225 Difference]: With dead ends: 94 [2018-11-28 18:52:46,096 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 18:52:46,097 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-11-28 18:52:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 18:52:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 18:52:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 18:52:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 18:52:46,098 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 272 [2018-11-28 18:52:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:52:46,098 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 18:52:46,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 18:52:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 18:52:46,099 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 18:52:46,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 18:52:46,204 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,206 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,208 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,209 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,213 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:46,215 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:52:47,530 WARN L180 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2018-11-28 18:52:47,617 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 18:52:47,618 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:52:47,618 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:52:47,618 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 18:52:47,618 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 18:52:47,618 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 18:52:47,618 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-11-28 18:52:47,619 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-28 18:52:47,619 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-11-28 18:52:47,619 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 7) (<= 7 main_~x~0)) [2018-11-28 18:52:47,619 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-11-28 18:52:47,619 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-28 18:52:47,620 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-11-28 18:52:47,620 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-11-28 18:52:47,620 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-11-28 18:52:47,620 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-11-28 18:52:47,620 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-11-28 18:52:47,620 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-11-28 18:52:47,620 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-28 18:52:47,621 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (and (or (<= 7 |fibo_#in~n|) (and (<= |fibo_#t~ret0| 5) (<= 5 |fibo_#t~ret0|)) (<= |fibo_#in~n| 5)) (<= fibo_~n |fibo_#in~n|) (let ((.cse0 (<= |fibo_#in~n| fibo_~n))) (or (and (<= |fibo_#t~ret0| 8) .cse0 (<= 8 |fibo_#t~ret0|)) (and (<= 8 |fibo_#in~n|) .cse0) (and (<= |fibo_#in~n| 6) .cse0))) (or (and (<= 4 |fibo_#in~n|) (<= fibo_~n 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (and (<= |fibo_#t~ret0| 1) (<= |fibo_#in~n| 3) (<= 1 |fibo_#t~ret0|)) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= 5 fibo_~n)) (<= 6 |fibo_#in~n|)) (< 1 fibo_~n)) [2018-11-28 18:52:47,621 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-11-28 18:52:47,621 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-11-28 18:52:47,621 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-11-28 18:52:47,621 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-11-28 18:52:47,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:52:47 BoogieIcfgContainer [2018-11-28 18:52:47,628 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:52:47,628 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:52:47,628 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:52:47,628 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:52:47,629 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:52:33" (3/4) ... [2018-11-28 18:52:47,635 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 18:52:47,642 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 18:52:47,643 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 18:52:47,643 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-11-28 18:52:47,650 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 18:52:47,650 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 18:52:47,651 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:52:47,696 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:52:47,697 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:52:47,698 INFO L168 Benchmark]: Toolchain (without parser) took 14819.98 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 363.3 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -178.1 MB). Peak memory consumption was 185.2 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:47,699 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:47,699 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.95 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:47,700 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.65 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:47,700 INFO L168 Benchmark]: Boogie Preprocessor took 28.05 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:52:47,702 INFO L168 Benchmark]: RCFGBuilder took 353.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -180.4 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:47,702 INFO L168 Benchmark]: TraceAbstraction took 14074.43 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 220.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -19.0 MB). Peak memory consumption was 201.8 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:47,703 INFO L168 Benchmark]: Witness Printer took 68.59 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 11.5 GB. [2018-11-28 18:52:47,708 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 262.95 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.65 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.05 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 353.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -180.4 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14074.43 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 220.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -19.0 MB). Peak memory consumption was 201.8 MB. Max. memory is 11.5 GB. * Witness Printer took 68.59 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 13.9s OverallTime, 12 OverallIterations, 53 TraceHistogramMax, 4.4s AutomataDifference, 0.0s DeadEndRemovalTime, 1.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 263 SDtfs, 280 SDslu, 1388 SDs, 0 SdLazy, 1417 SolverSat, 279 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1725 GetRequests, 1537 SyntacticMatches, 23 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 16 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 98 PreInvPairs, 239 NumberOfFragments, 106 HoareAnnotationTreeSize, 98 FomulaSimplifications, 2595 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1683 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 2993 NumberOfCodeBlocks, 2721 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 2971 ConstructedInterpolants, 0 QuantifiedInterpolants, 1439465 SizeOfPredicates, 44 NumberOfNonLiveVariables, 2692 ConjunctsInSsa, 255 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 33619/38970 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...