./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer --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 c7b71b458b3f08f188a62c7539b715f43fd7f97d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:45:17,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:45:17,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:45:17,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:45:17,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:45:17,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:45:17,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:45:17,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:45:17,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:45:17,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:45:17,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:45:17,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:45:17,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:45:17,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:45:17,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:45:17,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:45:17,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:45:17,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:45:17,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:45:17,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:45:17,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:45:17,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:45:17,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:45:17,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:45:17,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:45:17,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:45:17,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:45:17,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:45:17,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:45:17,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:45:17,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:45:17,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:45:17,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:45:17,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:45:17,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:45:17,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:45:17,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:45:17,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:45:17,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:45:17,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:45:17,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:45:17,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:45:17,915 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:45:17,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:45:17,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:45:17,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:45:17,917 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:45:17,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:45:17,917 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:45:17,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:45:17,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:45:17,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:45:17,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:45:17,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:45:17,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:45:17,919 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:45:17,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:45:17,920 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:45:17,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:45:17,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:45:17,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:45:17,921 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:45:17,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:45:17,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:45:17,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:45:17,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:45:17,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:45:17,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:45:17,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:45:17,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:45:17,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer 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 -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2019-11-15 23:45:17,952 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:45:17,963 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:45:17,967 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:45:17,968 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:45:17,969 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:45:17,969 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-15 23:45:18,028 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/data/eef7efd0d/a295e5c74b374a8ebf0e2e665f4efb37/FLAG5802f4e6e [2019-11-15 23:45:18,379 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:45:18,379 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-15 23:45:18,385 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/data/eef7efd0d/a295e5c74b374a8ebf0e2e665f4efb37/FLAG5802f4e6e [2019-11-15 23:45:18,778 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/data/eef7efd0d/a295e5c74b374a8ebf0e2e665f4efb37 [2019-11-15 23:45:18,781 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:45:18,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:45:18,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:45:18,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:45:18,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:45:18,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:45:18" (1/1) ... [2019-11-15 23:45:18,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4821e24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:18, skipping insertion in model container [2019-11-15 23:45:18,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:45:18" (1/1) ... [2019-11-15 23:45:18,796 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:45:18,808 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:45:19,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:45:19,023 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:45:19,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:45:19,128 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:45:19,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19 WrapperNode [2019-11-15 23:45:19,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:45:19,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:45:19,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:45:19,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:45:19,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (1/1) ... [2019-11-15 23:45:19,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (1/1) ... [2019-11-15 23:45:19,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:45:19,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:45:19,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:45:19,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:45:19,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (1/1) ... [2019-11-15 23:45:19,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (1/1) ... [2019-11-15 23:45:19,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (1/1) ... [2019-11-15 23:45:19,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (1/1) ... [2019-11-15 23:45:19,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (1/1) ... [2019-11-15 23:45:19,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (1/1) ... [2019-11-15 23:45:19,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (1/1) ... [2019-11-15 23:45:19,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:45:19,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:45:19,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:45:19,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:45:19,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/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 [2019-11-15 23:45:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:45:19,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:45:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-15 23:45:19,247 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-15 23:45:19,449 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:45:19,450 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 23:45:19,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:45:19 BoogieIcfgContainer [2019-11-15 23:45:19,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:45:19,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:45:19,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:45:19,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:45:19,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:45:18" (1/3) ... [2019-11-15 23:45:19,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d311809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:45:19, skipping insertion in model container [2019-11-15 23:45:19,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:45:19" (2/3) ... [2019-11-15 23:45:19,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d311809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:45:19, skipping insertion in model container [2019-11-15 23:45:19,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:45:19" (3/3) ... [2019-11-15 23:45:19,457 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2019-11-15 23:45:19,467 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:45:19,474 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:45:19,484 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:45:19,507 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:45:19,507 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:45:19,507 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:45:19,508 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:45:19,508 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:45:19,508 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:45:19,508 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:45:19,508 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:45:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-15 23:45:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 23:45:19,531 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:45:19,532 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:45:19,534 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:45:19,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:45:19,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-11-15 23:45:19,548 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:45:19,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648951124] [2019-11-15 23:45:19,549 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:19,549 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:19,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:45:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:45:19,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648951124] [2019-11-15 23:45:19,727 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:45:19,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:45:19,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608844878] [2019-11-15 23:45:19,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:45:19,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:45:19,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:45:19,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:45:19,746 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2019-11-15 23:45:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:45:19,857 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-11-15 23:45:19,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:45:19,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-15 23:45:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:45:19,868 INFO L225 Difference]: With dead ends: 29 [2019-11-15 23:45:19,869 INFO L226 Difference]: Without dead ends: 17 [2019-11-15 23:45:19,872 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:45:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-15 23:45:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-15 23:45:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 23:45:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-15 23:45:19,915 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-11-15 23:45:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:45:19,915 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-15 23:45:19,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:45:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-15 23:45:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 23:45:19,917 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:45:19,917 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:45:19,918 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:45:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:45:19,918 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-11-15 23:45:19,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:45:19,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300279802] [2019-11-15 23:45:19,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:19,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:19,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:45:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:45:19,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300279802] [2019-11-15 23:45:19,988 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:45:19,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 23:45:19,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318573330] [2019-11-15 23:45:19,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:45:19,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:45:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:45:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:45:19,991 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2019-11-15 23:45:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:45:20,051 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-11-15 23:45:20,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:45:20,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-15 23:45:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:45:20,053 INFO L225 Difference]: With dead ends: 23 [2019-11-15 23:45:20,053 INFO L226 Difference]: Without dead ends: 19 [2019-11-15 23:45:20,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:45:20,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-15 23:45:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-15 23:45:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 23:45:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-15 23:45:20,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-15 23:45:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:45:20,061 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-15 23:45:20,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:45:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-15 23:45:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 23:45:20,062 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:45:20,063 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:45:20,063 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:45:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:45:20,063 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-11-15 23:45:20,063 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:45:20,064 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110467781] [2019-11-15 23:45:20,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:20,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:20,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:45:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:45:20,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110467781] [2019-11-15 23:45:20,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710963449] [2019-11-15 23:45:20,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:20,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:45:20,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:45:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:45:20,388 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:45:20,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-15 23:45:20,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774319589] [2019-11-15 23:45:20,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 23:45:20,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:45:20,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 23:45:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:45:20,391 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 8 states. [2019-11-15 23:45:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:45:20,492 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-11-15 23:45:20,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:45:20,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-15 23:45:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:45:20,494 INFO L225 Difference]: With dead ends: 41 [2019-11-15 23:45:20,494 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 23:45:20,495 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:45:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 23:45:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-15 23:45:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-15 23:45:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-15 23:45:20,504 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 22 [2019-11-15 23:45:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:45:20,504 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-15 23:45:20,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 23:45:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-15 23:45:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 23:45:20,506 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:45:20,506 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:45:20,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:20,710 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:45:20,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:45:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash 178931364, now seen corresponding path program 1 times [2019-11-15 23:45:20,710 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:45:20,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514249062] [2019-11-15 23:45:20,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:20,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:20,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:45:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 23:45:20,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514249062] [2019-11-15 23:45:20,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180563229] [2019-11-15 23:45:20,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:20,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:45:20,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:45:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 23:45:20,943 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:45:20,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-15 23:45:20,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730084796] [2019-11-15 23:45:20,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 23:45:20,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:45:20,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 23:45:20,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:45:20,945 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 8 states. [2019-11-15 23:45:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:45:21,067 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-11-15 23:45:21,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:45:21,068 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-15 23:45:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:45:21,070 INFO L225 Difference]: With dead ends: 47 [2019-11-15 23:45:21,070 INFO L226 Difference]: Without dead ends: 43 [2019-11-15 23:45:21,071 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:45:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-15 23:45:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-15 23:45:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-15 23:45:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2019-11-15 23:45:21,087 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 23 [2019-11-15 23:45:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:45:21,087 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2019-11-15 23:45:21,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 23:45:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2019-11-15 23:45:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-15 23:45:21,090 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:45:21,090 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 23:45:21,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:21,297 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:45:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:45:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1840059703, now seen corresponding path program 2 times [2019-11-15 23:45:21,297 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:45:21,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485766432] [2019-11-15 23:45:21,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:21,298 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:21,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:45:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-15 23:45:21,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485766432] [2019-11-15 23:45:21,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227013771] [2019-11-15 23:45:21,482 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:21,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:45:21,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:45:21,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:45:21,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:45:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-15 23:45:21,565 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:45:21,565 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-15 23:45:21,565 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271632719] [2019-11-15 23:45:21,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:45:21,566 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:45:21,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:45:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:45:21,567 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 10 states. [2019-11-15 23:45:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:45:21,749 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2019-11-15 23:45:21,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 23:45:21,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-11-15 23:45:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:45:21,752 INFO L225 Difference]: With dead ends: 67 [2019-11-15 23:45:21,752 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 23:45:21,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:45:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 23:45:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-15 23:45:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:45:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-15 23:45:21,771 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 35 [2019-11-15 23:45:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:45:21,772 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-15 23:45:21,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:45:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-15 23:45:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-15 23:45:21,777 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:45:21,778 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:45:21,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:21,989 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:45:21,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:45:21,989 INFO L82 PathProgramCache]: Analyzing trace with hash 624826665, now seen corresponding path program 2 times [2019-11-15 23:45:21,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:45:21,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965237343] [2019-11-15 23:45:21,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:21,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:21,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:45:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-15 23:45:22,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965237343] [2019-11-15 23:45:22,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987725894] [2019-11-15 23:45:22,135 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:22,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:45:22,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:45:22,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:45:22,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:45:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-15 23:45:22,201 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:45:22,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-15 23:45:22,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499548491] [2019-11-15 23:45:22,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:45:22,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:45:22,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:45:22,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:45:22,203 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2019-11-15 23:45:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:45:22,313 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-15 23:45:22,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:45:22,313 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-11-15 23:45:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:45:22,315 INFO L225 Difference]: With dead ends: 52 [2019-11-15 23:45:22,315 INFO L226 Difference]: Without dead ends: 48 [2019-11-15 23:45:22,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:45:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-15 23:45:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-11-15 23:45:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-15 23:45:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2019-11-15 23:45:22,326 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 37 [2019-11-15 23:45:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:45:22,327 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2019-11-15 23:45:22,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:45:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2019-11-15 23:45:22,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-15 23:45:22,330 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:45:22,330 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 23:45:22,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:22,543 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:45:22,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:45:22,543 INFO L82 PathProgramCache]: Analyzing trace with hash -99212631, now seen corresponding path program 3 times [2019-11-15 23:45:22,543 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:45:22,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958769058] [2019-11-15 23:45:22,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:22,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:22,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:45:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-15 23:45:22,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958769058] [2019-11-15 23:45:22,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086081444] [2019-11-15 23:45:22,812 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:22,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-15 23:45:22,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:45:22,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:45:22,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:45:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-15 23:45:22,936 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:45:22,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2019-11-15 23:45:22,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274519547] [2019-11-15 23:45:22,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 23:45:22,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:45:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 23:45:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:45:22,939 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 15 states. [2019-11-15 23:45:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:45:23,410 INFO L93 Difference]: Finished difference Result 89 states and 139 transitions. [2019-11-15 23:45:23,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 23:45:23,412 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-15 23:45:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:45:23,414 INFO L225 Difference]: With dead ends: 89 [2019-11-15 23:45:23,414 INFO L226 Difference]: Without dead ends: 49 [2019-11-15 23:45:23,416 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2019-11-15 23:45:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-15 23:45:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-11-15 23:45:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-15 23:45:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2019-11-15 23:45:23,438 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 63 [2019-11-15 23:45:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:45:23,438 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2019-11-15 23:45:23,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 23:45:23,439 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2019-11-15 23:45:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-15 23:45:23,441 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:45:23,441 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-11-15 23:45:23,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:23,650 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:45:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:45:23,650 INFO L82 PathProgramCache]: Analyzing trace with hash 548614988, now seen corresponding path program 4 times [2019-11-15 23:45:23,650 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:45:23,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830539694] [2019-11-15 23:45:23,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:23,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:23,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:45:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-15 23:45:24,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830539694] [2019-11-15 23:45:24,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16800297] [2019-11-15 23:45:24,234 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:24,307 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:45:24,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:45:24,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-15 23:45:24,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:45:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-15 23:45:24,602 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:45:24,602 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2019-11-15 23:45:24,603 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496436055] [2019-11-15 23:45:24,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-15 23:45:24,604 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:45:24,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-15 23:45:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:45:24,604 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 20 states. [2019-11-15 23:45:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:45:24,838 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2019-11-15 23:45:24,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-15 23:45:24,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2019-11-15 23:45:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:45:24,840 INFO L225 Difference]: With dead ends: 71 [2019-11-15 23:45:24,840 INFO L226 Difference]: Without dead ends: 67 [2019-11-15 23:45:24,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:45:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-15 23:45:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2019-11-15 23:45:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-15 23:45:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 81 transitions. [2019-11-15 23:45:24,855 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 81 transitions. Word has length 105 [2019-11-15 23:45:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:45:24,858 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 81 transitions. [2019-11-15 23:45:24,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-15 23:45:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 81 transitions. [2019-11-15 23:45:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-15 23:45:24,864 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:45:24,865 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1] [2019-11-15 23:45:25,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:25,068 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:45:25,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:45:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1256539154, now seen corresponding path program 5 times [2019-11-15 23:45:25,069 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:45:25,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519731746] [2019-11-15 23:45:25,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:25,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:25,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:45:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 309 proven. 340 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-11-15 23:45:25,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519731746] [2019-11-15 23:45:25,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493844526] [2019-11-15 23:45:25,627 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:25,716 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-15 23:45:25,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:45:25,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-15 23:45:25,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:45:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 353 proven. 303 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2019-11-15 23:45:25,854 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:45:25,855 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 24 [2019-11-15 23:45:25,855 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453164144] [2019-11-15 23:45:25,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-15 23:45:25,859 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:45:25,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-15 23:45:25,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2019-11-15 23:45:25,860 INFO L87 Difference]: Start difference. First operand 56 states and 81 transitions. Second operand 24 states. [2019-11-15 23:45:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:45:26,458 INFO L93 Difference]: Finished difference Result 123 states and 212 transitions. [2019-11-15 23:45:26,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-15 23:45:26,458 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2019-11-15 23:45:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:45:26,460 INFO L225 Difference]: With dead ends: 123 [2019-11-15 23:45:26,460 INFO L226 Difference]: Without dead ends: 72 [2019-11-15 23:45:26,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2019-11-15 23:45:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-15 23:45:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2019-11-15 23:45:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-15 23:45:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-11-15 23:45:26,479 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 146 [2019-11-15 23:45:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:45:26,479 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-11-15 23:45:26,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-15 23:45:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-11-15 23:45:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-15 23:45:26,484 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:45:26,484 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1] [2019-11-15 23:45:26,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:26,688 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:45:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:45:26,688 INFO L82 PathProgramCache]: Analyzing trace with hash 938070515, now seen corresponding path program 6 times [2019-11-15 23:45:26,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:45:26,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736227842] [2019-11-15 23:45:26,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:26,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:45:26,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:45:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:45:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 401 proven. 810 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-15 23:45:27,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736227842] [2019-11-15 23:45:27,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610344110] [2019-11-15 23:45:27,382 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:27,461 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-15 23:45:27,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:45:27,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 23:45:27,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:45:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 246 proven. 374 refuted. 0 times theorem prover too weak. 1960 trivial. 0 not checked. [2019-11-15 23:45:27,614 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:45:27,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 27 [2019-11-15 23:45:27,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935211168] [2019-11-15 23:45:27,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-15 23:45:27,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:45:27,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-15 23:45:27,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2019-11-15 23:45:27,617 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 27 states. [2019-11-15 23:45:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:45:28,184 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-11-15 23:45:28,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-15 23:45:28,187 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 214 [2019-11-15 23:45:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:45:28,188 INFO L225 Difference]: With dead ends: 115 [2019-11-15 23:45:28,188 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 23:45:28,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2019-11-15 23:45:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 23:45:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 23:45:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 23:45:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 23:45:28,191 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2019-11-15 23:45:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:45:28,191 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 23:45:28,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-15 23:45:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 23:45:28,191 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 23:45:28,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:45:28,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-15 23:45:28,660 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2019-11-15 23:45:28,734 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2019-11-15 23:45:28,734 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-15 23:45:28,734 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-15 23:45:28,735 INFO L439 ceAbstractionStarter]: At program point L29(lines 23 30) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2019-11-15 23:45:28,735 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-15 23:45:28,735 INFO L443 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2019-11-15 23:45:28,735 INFO L443 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2019-11-15 23:45:28,735 INFO L439 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2019-11-15 23:45:28,735 INFO L443 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2019-11-15 23:45:28,735 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-11-15 23:45:28,735 INFO L443 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2019-11-15 23:45:28,735 INFO L443 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2019-11-15 23:45:28,736 INFO L439 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (or (not (<= |fibo_#in~n| 5)) (= fibo_~n |fibo_#in~n|)) (or (not (<= |fibo_#in~n| 4)) (< 1 fibo_~n))) [2019-11-15 23:45:28,736 INFO L443 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-15 23:45:28,736 INFO L439 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse2 (= fibo_~n |fibo_#in~n|)) (.cse4 (<= |fibo_#t~ret0| 1)) (.cse5 (<= 1 |fibo_#t~ret0|)) (.cse3 (<= 3 fibo_~n))) (let ((.cse1 (<= |fibo_#in~n| 4)) (.cse0 (and .cse2 (<= fibo_~n 3) .cse4 .cse5 .cse3))) (and (or (not (<= 3 |fibo_#in~n|)) .cse0 (not (<= |fibo_#in~n| 3))) (or (not (<= |fibo_#in~n| 5)) .cse1 (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= fibo_~n 5) (<= 5 fibo_~n))) (or (not .cse1) (and .cse2 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse3) .cse0 (and .cse2 .cse4 .cse5 (<= fibo_~n 2) (< 1 fibo_~n)))))) [2019-11-15 23:45:28,736 INFO L443 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2019-11-15 23:45:28,736 INFO L443 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2019-11-15 23:45:28,736 INFO L443 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2019-11-15 23:45:28,736 INFO L446 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2019-11-15 23:45:28,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:45:28 BoogieIcfgContainer [2019-11-15 23:45:28,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:45:28,756 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:45:28,757 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:45:28,757 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:45:28,757 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:45:19" (3/4) ... [2019-11-15 23:45:28,763 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 23:45:28,769 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2019-11-15 23:45:28,779 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-15 23:45:28,779 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-15 23:45:28,826 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7b9807fd-a812-4943-bc52-b9c45f006af1/bin/uautomizer/witness.graphml [2019-11-15 23:45:28,826 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:45:28,828 INFO L168 Benchmark]: Toolchain (without parser) took 10045.53 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 281.0 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -254.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. [2019-11-15 23:45:28,828 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:45:28,829 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.09 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 110.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -154.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-15 23:45:28,829 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.32 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:45:28,829 INFO L168 Benchmark]: Boogie Preprocessor took 16.97 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:45:28,830 INFO L168 Benchmark]: RCFGBuilder took 271.48 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:45:28,830 INFO L168 Benchmark]: TraceAbstraction took 9304.44 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 170.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -132.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:45:28,831 INFO L168 Benchmark]: Witness Printer took 70.06 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2019-11-15 23:45:28,833 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 346.09 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 110.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -154.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.32 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.97 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 271.48 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9304.44 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 170.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -132.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 11.5 GB. * Witness Printer took 70.06 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 9.2s, OverallIterations: 10, TraceHistogramMax: 31, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, HoareTripleCheckerStatistics: 183 SDtfs, 419 SDslu, 822 SDs, 0 SdLazy, 1386 SolverSat, 417 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 992 GetRequests, 827 SyntacticMatches, 9 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 134 PreInvPairs, 157 NumberOfFragments, 125 HoareAnnotationTreeSize, 134 FomulaSimplifications, 185 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 312 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 1309 NumberOfCodeBlocks, 1157 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 1291 ConstructedInterpolants, 0 QuantifiedInterpolants, 365059 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1110 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 6820/9218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...