./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_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/Fibonacci03_true-unreach-call_true-no-overflow_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 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 18:49:51,782 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:49:51,787 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:49:51,804 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:49:51,806 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:49:51,808 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:49:51,809 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:49:51,812 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:49:51,816 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:49:51,817 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:49:51,817 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:49:51,820 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:49:51,822 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:49:51,822 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:49:51,832 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:49:51,832 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:49:51,834 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:49:51,835 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:49:51,837 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:49:51,839 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:49:51,840 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:49:51,842 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:49:51,845 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:49:51,848 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:49:51,849 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:49:51,850 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:49:51,850 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:49:51,853 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:49:51,854 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:49:51,858 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:49:51,858 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:49:51,859 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:49:51,859 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:49:51,859 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:49:51,860 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:49:51,863 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:49:51,865 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:49:51,881 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:49:51,881 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:49:51,882 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:49:51,882 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:49:51,883 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:49:51,884 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:49:51,884 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:49:51,884 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:49:51,884 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:49:51,885 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:49:51,885 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:49:51,885 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:49:51,885 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:49:51,886 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:49:51,886 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:49:51,886 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:49:51,887 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:49:51,887 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:49:51,887 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:49:51,887 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:49:51,887 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:49:51,887 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:49:51,888 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:49:51,888 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:49:51,888 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:49:51,888 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:49:51,888 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:49:51,890 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:49:51,890 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:49:51,890 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:49:51,891 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 -> 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 [2018-11-28 18:49:51,945 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:49:51,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:49:51,962 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:49:51,964 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:49:51,965 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:49:51,965 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 18:49:52,022 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668206dd0/a66eb141d6ff4388872c140c50a426f1/FLAG49c216440 [2018-11-28 18:49:52,475 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:49:52,481 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 18:49:52,491 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668206dd0/a66eb141d6ff4388872c140c50a426f1/FLAG49c216440 [2018-11-28 18:49:52,816 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668206dd0/a66eb141d6ff4388872c140c50a426f1 [2018-11-28 18:49:52,820 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:49:52,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:49:52,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:49:52,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:49:52,827 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:49:52,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:52,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e7cbefc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:52, skipping insertion in model container [2018-11-28 18:49:52,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:49:52" (1/1) ... [2018-11-28 18:49:52,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:49:52,862 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:49:53,100 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:49:53,106 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:49:53,129 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:49:53,149 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:49:53,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53 WrapperNode [2018-11-28 18:49:53,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:49:53,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:49:53,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:49:53,151 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:49:53,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (1/1) ... [2018-11-28 18:49:53,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (1/1) ... [2018-11-28 18:49:53,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:49:53,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:49:53,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:49:53,179 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:49:53,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (1/1) ... [2018-11-28 18:49:53,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (1/1) ... [2018-11-28 18:49:53,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (1/1) ... [2018-11-28 18:49:53,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (1/1) ... [2018-11-28 18:49:53,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (1/1) ... [2018-11-28 18:49:53,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (1/1) ... [2018-11-28 18:49:53,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (1/1) ... [2018-11-28 18:49:53,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:49:53,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:49:53,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:49:53,210 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:49:53,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (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 18:49:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-28 18:49:53,354 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-28 18:49:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:49:53,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:49:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:49:53,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:49:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:49:53,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:49:53,640 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:49:53,641 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:49:53,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:49:53 BoogieIcfgContainer [2018-11-28 18:49:53,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:49:53,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:49:53,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:49:53,646 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:49:53,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:49:52" (1/3) ... [2018-11-28 18:49:53,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea29f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:49:53, skipping insertion in model container [2018-11-28 18:49:53,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:49:53" (2/3) ... [2018-11-28 18:49:53,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea29f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:49:53, skipping insertion in model container [2018-11-28 18:49:53,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:49:53" (3/3) ... [2018-11-28 18:49:53,650 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 18:49:53,663 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:49:53,672 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:49:53,698 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:49:53,759 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:49:53,759 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:49:53,760 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:49:53,760 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:49:53,760 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:49:53,760 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:49:53,760 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:49:53,760 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:49:53,761 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:49:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-28 18:49:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 18:49:53,789 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:53,790 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:53,793 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:53,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-11-28 18:49:53,803 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:53,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:53,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:53,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:53,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:54,021 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 18:49:54,024 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:49:54,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:49:54,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:49:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:49:54,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:49:54,044 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-28 18:49:54,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:54,233 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-28 18:49:54,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:49:54,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 18:49:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:54,247 INFO L225 Difference]: With dead ends: 36 [2018-11-28 18:49:54,247 INFO L226 Difference]: Without dead ends: 22 [2018-11-28 18:49:54,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:49:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-28 18:49:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-28 18:49:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-28 18:49:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-28 18:49:54,298 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-11-28 18:49:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:54,299 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-28 18:49:54,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:49:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-28 18:49:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-28 18:49:54,301 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:54,301 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:54,301 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:54,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:54,302 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2018-11-28 18:49:54,302 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:54,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:54,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:54,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:54,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:54,421 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 18:49:54,421 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:49:54,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:49:54,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:49:54,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:49:54,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:49:54,424 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2018-11-28 18:49:54,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:54,721 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2018-11-28 18:49:54,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:49:54,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-28 18:49:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:54,723 INFO L225 Difference]: With dead ends: 28 [2018-11-28 18:49:54,723 INFO L226 Difference]: Without dead ends: 24 [2018-11-28 18:49:54,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:49:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-28 18:49:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-11-28 18:49:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-28 18:49:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-28 18:49:54,731 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2018-11-28 18:49:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:54,732 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-28 18:49:54,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:49:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-28 18:49:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 18:49:54,733 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:54,734 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 18:49:54,734 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:54,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:54,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-11-28 18:49:54,734 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:54,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:54,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:54,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:54,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:54,924 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 18:49:54,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:54,925 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 18:49:54,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:54,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:55,055 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 18:49:55,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:55,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-28 18:49:55,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:49:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:49:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:49:55,086 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2018-11-28 18:49:55,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:55,444 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-11-28 18:49:55,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 18:49:55,447 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-11-28 18:49:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:55,448 INFO L225 Difference]: With dead ends: 39 [2018-11-28 18:49:55,448 INFO L226 Difference]: Without dead ends: 24 [2018-11-28 18:49:55,450 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:49:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-28 18:49:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-28 18:49:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 18:49:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-11-28 18:49:55,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-11-28 18:49:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:55,459 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-11-28 18:49:55,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:49:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-11-28 18:49:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-28 18:49:55,462 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:55,462 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, 1] [2018-11-28 18:49:55,463 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:55,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-11-28 18:49:55,464 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:55,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:55,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:55,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:55,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:55,610 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 18:49:55,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:55,611 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 18:49:55,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:55,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:55,677 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 18:49:55,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:55,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 18:49:55,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:49:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:49:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:49:55,704 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2018-11-28 18:49:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:56,143 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2018-11-28 18:49:56,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:49:56,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-11-28 18:49:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:56,146 INFO L225 Difference]: With dead ends: 33 [2018-11-28 18:49:56,146 INFO L226 Difference]: Without dead ends: 29 [2018-11-28 18:49:56,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:49:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-28 18:49:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-28 18:49:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-28 18:49:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-11-28 18:49:56,156 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-11-28 18:49:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:56,156 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-11-28 18:49:56,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:49:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-11-28 18:49:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 18:49:56,158 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:56,159 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, 1] [2018-11-28 18:49:56,159 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:56,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:56,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-11-28 18:49:56,160 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:56,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:56,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:56,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:49:56,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:56,260 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 18:49:56,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:56,261 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 18:49:56,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:49:56,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:49:56,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:49:56,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:56,391 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 18:49:56,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:56,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-28 18:49:56,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 18:49:56,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 18:49:56,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-28 18:49:56,423 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 9 states. [2018-11-28 18:49:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:56,740 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2018-11-28 18:49:56,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 18:49:56,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2018-11-28 18:49:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:56,743 INFO L225 Difference]: With dead ends: 43 [2018-11-28 18:49:56,743 INFO L226 Difference]: Without dead ends: 37 [2018-11-28 18:49:56,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-11-28 18:49:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-28 18:49:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-11-28 18:49:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-28 18:49:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2018-11-28 18:49:56,755 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 41 [2018-11-28 18:49:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:56,756 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2018-11-28 18:49:56,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 18:49:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2018-11-28 18:49:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 18:49:56,760 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:56,760 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, 1] [2018-11-28 18:49:56,761 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:56,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:56,761 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 3 times [2018-11-28 18:49:56,761 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:56,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:56,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:56,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:49:56,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:57,088 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 18:49:57,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:57,089 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:49:57,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:49:57,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 18:49:57,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:49:57,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:57,263 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 18:49:57,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:57,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-28 18:49:57,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 18:49:57,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 18:49:57,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:49:57,294 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand 12 states. [2018-11-28 18:49:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:57,779 INFO L93 Difference]: Finished difference Result 77 states and 144 transitions. [2018-11-28 18:49:57,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:49:57,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2018-11-28 18:49:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:57,784 INFO L225 Difference]: With dead ends: 77 [2018-11-28 18:49:57,784 INFO L226 Difference]: Without dead ends: 50 [2018-11-28 18:49:57,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-28 18:49:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-28 18:49:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2018-11-28 18:49:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-28 18:49:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 64 transitions. [2018-11-28 18:49:57,798 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 64 transitions. Word has length 97 [2018-11-28 18:49:57,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:57,798 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 64 transitions. [2018-11-28 18:49:57,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 18:49:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 64 transitions. [2018-11-28 18:49:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-28 18:49:57,801 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:57,801 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:57,802 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:57,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:57,802 INFO L82 PathProgramCache]: Analyzing trace with hash 587556238, now seen corresponding path program 4 times [2018-11-28 18:49:57,802 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:57,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:57,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:57,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:49:57,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 113 proven. 82 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-11-28 18:49:58,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:58,042 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 18:49:58,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:49:58,091 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:49:58,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:49:58,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:49:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 84 proven. 176 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-11-28 18:49:58,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:49:58,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 14 [2018-11-28 18:49:58,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 18:49:58,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 18:49:58,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-11-28 18:49:58,335 INFO L87 Difference]: Start difference. First operand 44 states and 64 transitions. Second operand 14 states. [2018-11-28 18:49:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:49:59,335 INFO L93 Difference]: Finished difference Result 108 states and 183 transitions. [2018-11-28 18:49:59,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 18:49:59,336 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2018-11-28 18:49:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:49:59,339 INFO L225 Difference]: With dead ends: 108 [2018-11-28 18:49:59,339 INFO L226 Difference]: Without dead ends: 69 [2018-11-28 18:49:59,342 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2018-11-28 18:49:59,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-28 18:49:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-28 18:49:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-28 18:49:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2018-11-28 18:49:59,355 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 98 [2018-11-28 18:49:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:49:59,355 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2018-11-28 18:49:59,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 18:49:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2018-11-28 18:49:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-11-28 18:49:59,362 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:49:59,363 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:49:59,363 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:49:59,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:49:59,363 INFO L82 PathProgramCache]: Analyzing trace with hash -516480259, now seen corresponding path program 5 times [2018-11-28 18:49:59,363 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:49:59,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:49:59,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:59,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:49:59,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:49:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:49:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 137 proven. 567 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2018-11-28 18:49:59,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:49:59,817 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 18:49:59,828 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:50:00,098 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-28 18:50:00,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:50:00,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 630 proven. 586 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2018-11-28 18:50:00,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:00,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 17 [2018-11-28 18:50:00,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 18:50:00,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 18:50:00,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-11-28 18:50:00,358 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand 17 states. [2018-11-28 18:50:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:01,612 INFO L93 Difference]: Finished difference Result 153 states and 239 transitions. [2018-11-28 18:50:01,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-28 18:50:01,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 219 [2018-11-28 18:50:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:01,616 INFO L225 Difference]: With dead ends: 153 [2018-11-28 18:50:01,617 INFO L226 Difference]: Without dead ends: 93 [2018-11-28 18:50:01,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=1085, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 18:50:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-28 18:50:01,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2018-11-28 18:50:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-28 18:50:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2018-11-28 18:50:01,633 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 219 [2018-11-28 18:50:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:01,634 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2018-11-28 18:50:01,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 18:50:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2018-11-28 18:50:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2018-11-28 18:50:01,642 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:01,643 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 46, 28, 28, 28, 28, 28, 28, 28, 18, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:01,643 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:01,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:01,643 INFO L82 PathProgramCache]: Analyzing trace with hash 165459912, now seen corresponding path program 6 times [2018-11-28 18:50:01,644 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:01,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:01,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:01,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:50:01,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8931 backedges. 263 proven. 1415 refuted. 0 times theorem prover too weak. 7253 trivial. 0 not checked. [2018-11-28 18:50:01,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:01,981 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 18:50:01,990 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:50:02,098 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-11-28 18:50:02,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:50:02,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8931 backedges. 371 proven. 1307 refuted. 0 times theorem prover too weak. 7253 trivial. 0 not checked. [2018-11-28 18:50:02,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:02,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 18:50:02,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 18:50:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 18:50:02,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-28 18:50:02,234 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 11 states. [2018-11-28 18:50:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:02,456 INFO L93 Difference]: Finished difference Result 91 states and 125 transitions. [2018-11-28 18:50:02,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:50:02,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 396 [2018-11-28 18:50:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:02,461 INFO L225 Difference]: With dead ends: 91 [2018-11-28 18:50:02,461 INFO L226 Difference]: Without dead ends: 87 [2018-11-28 18:50:02,462 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-28 18:50:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-28 18:50:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-28 18:50:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-28 18:50:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 121 transitions. [2018-11-28 18:50:02,477 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 121 transitions. Word has length 396 [2018-11-28 18:50:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:02,479 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 121 transitions. [2018-11-28 18:50:02,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 18:50:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 121 transitions. [2018-11-28 18:50:02,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2018-11-28 18:50:02,491 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:02,492 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:02,492 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:02,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash 826091136, now seen corresponding path program 7 times [2018-11-28 18:50:02,493 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:02,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:02,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:02,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:50:02,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 425 proven. 2285 refuted. 0 times theorem prover too weak. 13697 trivial. 0 not checked. [2018-11-28 18:50:02,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:02,931 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 18:50:02,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:50:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:03,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 386 proven. 2689 refuted. 0 times theorem prover too weak. 13332 trivial. 0 not checked. [2018-11-28 18:50:03,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:03,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2018-11-28 18:50:03,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 18:50:03,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 18:50:03,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:50:03,349 INFO L87 Difference]: Start difference. First operand 87 states and 121 transitions. Second operand 12 states. [2018-11-28 18:50:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:03,791 INFO L93 Difference]: Finished difference Result 96 states and 140 transitions. [2018-11-28 18:50:03,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 18:50:03,792 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 532 [2018-11-28 18:50:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:03,796 INFO L225 Difference]: With dead ends: 96 [2018-11-28 18:50:03,796 INFO L226 Difference]: Without dead ends: 92 [2018-11-28 18:50:03,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-28 18:50:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-28 18:50:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-11-28 18:50:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-28 18:50:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 136 transitions. [2018-11-28 18:50:03,811 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 136 transitions. Word has length 532 [2018-11-28 18:50:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:03,813 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 136 transitions. [2018-11-28 18:50:03,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 18:50:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 136 transitions. [2018-11-28 18:50:03,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1201 [2018-11-28 18:50:03,824 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:03,825 INFO L402 BasicCegarLoop]: trace histogram [175, 175, 142, 87, 87, 87, 87, 87, 87, 87, 55, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:03,825 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:03,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:03,825 INFO L82 PathProgramCache]: Analyzing trace with hash -497666383, now seen corresponding path program 8 times [2018-11-28 18:50:03,826 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:03,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:03,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:03,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:50:03,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 85875 backedges. 2520 proven. 6657 refuted. 0 times theorem prover too weak. 76698 trivial. 0 not checked. [2018-11-28 18:50:04,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:04,965 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 18:50:04,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:50:05,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:50:05,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:50:05,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 85875 backedges. 39097 proven. 2092 refuted. 0 times theorem prover too weak. 44686 trivial. 0 not checked. [2018-11-28 18:50:06,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:06,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 21 [2018-11-28 18:50:06,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 18:50:06,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 18:50:06,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2018-11-28 18:50:06,205 INFO L87 Difference]: Start difference. First operand 92 states and 136 transitions. Second operand 21 states. [2018-11-28 18:50:07,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:07,184 INFO L93 Difference]: Finished difference Result 198 states and 359 transitions. [2018-11-28 18:50:07,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-28 18:50:07,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1200 [2018-11-28 18:50:07,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:07,188 INFO L225 Difference]: With dead ends: 198 [2018-11-28 18:50:07,188 INFO L226 Difference]: Without dead ends: 115 [2018-11-28 18:50:07,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1243 GetRequests, 1198 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=451, Invalid=1619, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 18:50:07,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-28 18:50:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2018-11-28 18:50:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-11-28 18:50:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 150 transitions. [2018-11-28 18:50:07,213 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 150 transitions. Word has length 1200 [2018-11-28 18:50:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:07,214 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 150 transitions. [2018-11-28 18:50:07,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 18:50:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 150 transitions. [2018-11-28 18:50:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1173 [2018-11-28 18:50:07,228 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:07,229 INFO L402 BasicCegarLoop]: trace histogram [171, 171, 138, 85, 85, 85, 85, 85, 85, 85, 53, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:07,229 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:07,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:07,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1984589965, now seen corresponding path program 9 times [2018-11-28 18:50:07,230 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:07,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:07,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:07,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:50:07,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:08,030 WARN L180 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-11-28 18:50:08,336 WARN L180 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-11-28 18:50:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 81873 backedges. 4013 proven. 5837 refuted. 0 times theorem prover too weak. 72023 trivial. 0 not checked. [2018-11-28 18:50:08,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:08,963 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 18:50:08,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:50:09,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-11-28 18:50:09,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:50:09,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 81873 backedges. 29640 proven. 296 refuted. 0 times theorem prover too weak. 51937 trivial. 0 not checked. [2018-11-28 18:50:10,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:10,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2018-11-28 18:50:10,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 18:50:11,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 18:50:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2018-11-28 18:50:11,001 INFO L87 Difference]: Start difference. First operand 104 states and 150 transitions. Second operand 18 states. [2018-11-28 18:50:11,600 WARN L180 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-11-28 18:50:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:12,157 INFO L93 Difference]: Finished difference Result 210 states and 336 transitions. [2018-11-28 18:50:12,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 18:50:12,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1172 [2018-11-28 18:50:12,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:12,161 INFO L225 Difference]: With dead ends: 210 [2018-11-28 18:50:12,162 INFO L226 Difference]: Without dead ends: 115 [2018-11-28 18:50:12,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1207 GetRequests, 1176 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2018-11-28 18:50:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-28 18:50:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2018-11-28 18:50:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-28 18:50:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 140 transitions. [2018-11-28 18:50:12,193 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 140 transitions. Word has length 1172 [2018-11-28 18:50:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:12,194 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 140 transitions. [2018-11-28 18:50:12,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 18:50:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 140 transitions. [2018-11-28 18:50:12,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2018-11-28 18:50:12,202 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:12,202 INFO L402 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:12,203 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:12,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:12,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 10 times [2018-11-28 18:50:12,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:12,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:12,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:12,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:50:12,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-28 18:50:13,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:13,200 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:50:13,211 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:50:13,430 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:50:13,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:50:13,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-28 18:50:14,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:50:14,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-11-28 18:50:14,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-28 18:50:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-28 18:50:14,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 18:50:14,757 INFO L87 Difference]: Start difference. First operand 97 states and 140 transitions. Second operand 36 states. [2018-11-28 18:50:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:15,217 INFO L93 Difference]: Finished difference Result 108 states and 168 transitions. [2018-11-28 18:50:15,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-28 18:50:15,218 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2018-11-28 18:50:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:15,220 INFO L225 Difference]: With dead ends: 108 [2018-11-28 18:50:15,220 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 18:50:15,221 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=344, Invalid=1216, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 18:50:15,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 18:50:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 18:50:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 18:50:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 18:50:15,222 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2018-11-28 18:50:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:15,222 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 18:50:15,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-28 18:50:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 18:50:15,223 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 18:50:15,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 18:50:15,246 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:50:15,261 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 18:50:16,068 WARN L180 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 8 [2018-11-28 18:50:16,606 WARN L180 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2018-11-28 18:50:16,609 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-28 18:50:16,609 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-28 18:50:16,610 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (< 1 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-11-28 18:50:16,610 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-28 18:50:16,610 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse1 (<= 1 |fibonacci_#t~ret0|)) (.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse3 (<= 7 fibonacci_~n)) (.cse4 (<= 6 fibonacci_~n)) (.cse2 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| 3) .cse0 .cse1 (<= 3 |fibonacci_#in~n|) .cse2) (and (<= 21 |fibonacci_#t~ret0|) .cse0 .cse3 .cse2) (and (<= 13 |fibonacci_#t~ret0|) .cse0 (<= |fibonacci_#in~n| 8) .cse4 .cse2) (and .cse1 (<= |fibonacci_#in~n| 2) (<= 2 fibonacci_~n) .cse2) (and (<= 5 |fibonacci_#in~n|) .cse0 (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 5) .cse2) (and (<= 4 |fibonacci_#in~n|) .cse0 (<= fibonacci_~n 4) (<= 2 |fibonacci_#t~ret0|)) (and (<= 8 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 7) .cse3 .cse2) (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6) .cse4 .cse2))) [2018-11-28 18:50:16,610 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-28 18:50:16,610 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-28 18:50:16,610 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-28 18:50:16,610 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-28 18:50:16,610 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 18:50:16,611 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:50:16,611 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 18:50:16,611 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 18:50:16,611 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 18:50:16,611 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 18:50:16,611 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-11-28 18:50:16,611 INFO L451 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-11-28 18:50:16,611 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-11-28 18:50:16,611 INFO L448 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-11-28 18:50:16,611 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-11-28 18:50:16,611 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-11-28 18:50:16,612 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-11-28 18:50:16,612 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-11-28 18:50:16,612 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-11-28 18:50:16,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:50:16 BoogieIcfgContainer [2018-11-28 18:50:16,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:50:16,616 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:50:16,616 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:50:16,616 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:50:16,616 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:49:53" (3/4) ... [2018-11-28 18:50:16,620 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 18:50:16,628 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-28 18:50:16,628 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 18:50:16,629 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 18:50:16,634 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 18:50:16,634 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 18:50:16,634 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 18:50:16,682 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:50:16,682 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:50:16,683 INFO L168 Benchmark]: Toolchain (without parser) took 23862.31 ms. Allocated memory was 1.0 GB in the beginning and 2.4 GB in the end (delta: 1.4 GB). Free memory was 952.7 MB in the beginning and 1.7 GB in the end (delta: -755.8 MB). Peak memory consumption was 661.3 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:16,685 INFO L168 Benchmark]: CDTParser took 0.15 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 18:50:16,685 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.38 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:16,686 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.79 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:50:16,686 INFO L168 Benchmark]: Boogie Preprocessor took 30.27 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:50:16,686 INFO L168 Benchmark]: RCFGBuilder took 432.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 941.9 MB in the beginning and 1.1 GB in the end (delta: -168.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:16,689 INFO L168 Benchmark]: TraceAbstraction took 22972.49 ms. Allocated memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: 1.3 GB). Free memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: -598.2 MB). Peak memory consumption was 682.1 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:16,689 INFO L168 Benchmark]: Witness Printer took 66.51 ms. Allocated memory is still 2.4 GB. Free memory is still 1.7 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:50:16,694 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 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 327.38 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 941.9 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 27.79 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.27 ms. Allocated memory is still 1.0 GB. Free memory is still 941.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 432.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 941.9 MB in the beginning and 1.1 GB in the end (delta: -168.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 22972.49 ms. Allocated memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: 1.3 GB). Free memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: -598.2 MB). Peak memory consumption was 682.1 MB. Max. memory is 11.5 GB. * Witness Printer took 66.51 ms. Allocated memory is still 2.4 GB. Free memory is still 1.7 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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, 22.8s OverallTime, 13 OverallIterations, 175 TraceHistogramMax, 7.7s AutomataDifference, 0.0s DeadEndRemovalTime, 1.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 329 SDtfs, 572 SDslu, 1497 SDs, 0 SdLazy, 2119 SolverSat, 669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5029 GetRequests, 4762 SyntacticMatches, 2 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=11, 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, 13 MinimizatonAttempts, 51 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 212 PreInvPairs, 298 NumberOfFragments, 131 HoareAnnotationTreeSize, 212 FomulaSimplifications, 1498 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2427 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 9149 NumberOfCodeBlocks, 8193 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 9125 ConstructedInterpolants, 0 QuantifiedInterpolants, 10071505 SizeOfPredicates, 66 NumberOfNonLiveVariables, 8016 ConjunctsInSsa, 354 ConjunctsInUnsatCore, 24 InterpolantComputations, 2 PerfectInterpolantSequences, 425430/459398 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...