./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 595c6555624af5bbcf79585a20acb2500e3eeee8 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 01:25:04,003 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 01:25:04,004 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 01:25:04,010 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 01:25:04,010 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 01:25:04,010 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 01:25:04,011 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 01:25:04,012 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 01:25:04,013 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 01:25:04,014 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 01:25:04,015 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 01:25:04,015 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 01:25:04,015 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 01:25:04,016 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 01:25:04,017 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 01:25:04,017 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 01:25:04,018 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 01:25:04,019 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 01:25:04,021 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 01:25:04,022 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 01:25:04,023 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 01:25:04,023 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 01:25:04,025 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 01:25:04,025 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 01:25:04,025 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 01:25:04,026 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 01:25:04,027 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 01:25:04,027 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 01:25:04,028 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 01:25:04,029 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 01:25:04,029 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 01:25:04,029 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 01:25:04,030 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 01:25:04,030 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 01:25:04,030 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 01:25:04,031 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 01:25:04,031 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 01:25:04,041 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 01:25:04,041 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 01:25:04,042 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 01:25:04,042 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 01:25:04,042 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 01:25:04,042 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 01:25:04,042 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 01:25:04,043 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 01:25:04,043 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 01:25:04,043 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 01:25:04,043 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 01:25:04,043 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 01:25:04,043 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 01:25:04,044 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 01:25:04,044 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 01:25:04,044 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 01:25:04,044 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 01:25:04,044 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 01:25:04,044 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 01:25:04,045 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 01:25:04,045 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 01:25:04,045 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 01:25:04,045 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 01:25:04,045 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 01:25:04,045 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 01:25:04,045 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 01:25:04,045 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 01:25:04,046 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 01:25:04,046 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 01:25:04,046 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 01:25:04,046 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 01:25:04,046 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 01:25:04,046 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 01:25:04,046 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 01:25:04,046 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 01:25:04,047 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 01:25:04,047 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 01:25:04,047 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan 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 -> Taipan 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 -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2018-11-23 01:25:04,070 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 01:25:04,079 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 01:25:04,081 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 01:25:04,083 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 01:25:04,083 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 01:25:04,083 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-23 01:25:04,127 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/data/9e14f56dd/dd6302b6ca2f414cba6d891cb7946eb5/FLAG5581374c1 [2018-11-23 01:25:04,459 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 01:25:04,459 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-23 01:25:04,465 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/data/9e14f56dd/dd6302b6ca2f414cba6d891cb7946eb5/FLAG5581374c1 [2018-11-23 01:25:04,884 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/data/9e14f56dd/dd6302b6ca2f414cba6d891cb7946eb5 [2018-11-23 01:25:04,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 01:25:04,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 01:25:04,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 01:25:04,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 01:25:04,890 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 01:25:04,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:25:04" (1/1) ... [2018-11-23 01:25:04,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2170f2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:04, skipping insertion in model container [2018-11-23 01:25:04,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:25:04" (1/1) ... [2018-11-23 01:25:04,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 01:25:04,910 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 01:25:05,029 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 01:25:05,031 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 01:25:05,041 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 01:25:05,049 INFO L195 MainTranslator]: Completed translation [2018-11-23 01:25:05,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05 WrapperNode [2018-11-23 01:25:05,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 01:25:05,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 01:25:05,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 01:25:05,050 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 01:25:05,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (1/1) ... [2018-11-23 01:25:05,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (1/1) ... [2018-11-23 01:25:05,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 01:25:05,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 01:25:05,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 01:25:05,061 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 01:25:05,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (1/1) ... [2018-11-23 01:25:05,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (1/1) ... [2018-11-23 01:25:05,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (1/1) ... [2018-11-23 01:25:05,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (1/1) ... [2018-11-23 01:25:05,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (1/1) ... [2018-11-23 01:25:05,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (1/1) ... [2018-11-23 01:25:05,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (1/1) ... [2018-11-23 01:25:05,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 01:25:05,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 01:25:05,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 01:25:05,072 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 01:25:05,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 01:25:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 01:25:05,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 01:25:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 01:25:05,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 01:25:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 01:25:05,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 01:25:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-23 01:25:05,140 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-23 01:25:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-23 01:25:05,141 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-23 01:25:05,244 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 01:25:05,245 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 01:25:05,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:25:05 BoogieIcfgContainer [2018-11-23 01:25:05,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 01:25:05,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 01:25:05,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 01:25:05,248 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 01:25:05,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:25:04" (1/3) ... [2018-11-23 01:25:05,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17eb6e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:25:05, skipping insertion in model container [2018-11-23 01:25:05,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:25:05" (2/3) ... [2018-11-23 01:25:05,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17eb6e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:25:05, skipping insertion in model container [2018-11-23 01:25:05,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:25:05" (3/3) ... [2018-11-23 01:25:05,251 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-23 01:25:05,258 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 01:25:05,264 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 01:25:05,275 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 01:25:05,299 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 01:25:05,299 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 01:25:05,299 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 01:25:05,299 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 01:25:05,299 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 01:25:05,299 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 01:25:05,300 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 01:25:05,300 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 01:25:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-23 01:25:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 01:25:05,316 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:05,317 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:05,318 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:05,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:05,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-23 01:25:05,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:05,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:05,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:05,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:05,364 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 01:25:05,443 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 01:25:05,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 01:25:05,444 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 01:25:05,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 01:25:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 01:25:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 01:25:05,456 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-23 01:25:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:05,515 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-23 01:25:05,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 01:25:05,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 01:25:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:05,521 INFO L225 Difference]: With dead ends: 44 [2018-11-23 01:25:05,522 INFO L226 Difference]: Without dead ends: 30 [2018-11-23 01:25:05,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 01:25:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-23 01:25:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-23 01:25:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 01:25:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-23 01:25:05,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-23 01:25:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:05,550 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-23 01:25:05,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 01:25:05,550 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-23 01:25:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 01:25:05,552 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:05,552 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:05,553 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:05,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-23 01:25:05,553 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:05,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:05,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:05,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:05,554 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 01:25:05,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 01:25:05,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 01:25:05,601 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 01:25:05,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 01:25:05,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 01:25:05,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 01:25:05,603 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-23 01:25:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:05,644 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-23 01:25:05,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 01:25:05,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 01:25:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:05,645 INFO L225 Difference]: With dead ends: 36 [2018-11-23 01:25:05,645 INFO L226 Difference]: Without dead ends: 32 [2018-11-23 01:25:05,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 01:25:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-23 01:25:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-23 01:25:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 01:25:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-23 01:25:05,650 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-23 01:25:05,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:05,650 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-23 01:25:05,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 01:25:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-23 01:25:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 01:25:05,651 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:05,651 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:05,651 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:05,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:05,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-23 01:25:05,652 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:05,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:05,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:05,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:05,653 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 01:25:05,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:05,721 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:05,722 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-23 01:25:05,723 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [31], [32], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [56], [57], [58], [59] [2018-11-23 01:25:05,745 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 01:25:05,745 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 01:25:05,814 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 01:25:05,815 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 3. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 5 variables. [2018-11-23 01:25:05,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:05,820 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 01:25:05,858 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-11-23 01:25:05,858 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 01:25:05,905 INFO L415 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-11-23 01:25:05,905 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 01:25:05,906 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 01:25:05,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-23 01:25:05,906 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 01:25:05,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 01:25:05,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 01:25:05,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 01:25:05,907 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2018-11-23 01:25:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:06,055 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2018-11-23 01:25:06,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 01:25:06,056 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-11-23 01:25:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:06,057 INFO L225 Difference]: With dead ends: 72 [2018-11-23 01:25:06,057 INFO L226 Difference]: Without dead ends: 48 [2018-11-23 01:25:06,057 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-23 01:25:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-23 01:25:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-11-23 01:25:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-23 01:25:06,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2018-11-23 01:25:06,063 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2018-11-23 01:25:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:06,063 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2018-11-23 01:25:06,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 01:25:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2018-11-23 01:25:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-23 01:25:06,064 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:06,065 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:06,065 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:06,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:06,065 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-23 01:25:06,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:06,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:06,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:06,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:06,066 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-23 01:25:06,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:06,117 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:06,117 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-11-23 01:25:06,117 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [35], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-23 01:25:06,119 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 01:25:06,119 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 01:25:06,206 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 01:25:06,206 INFO L272 AbstractInterpreter]: Visited 28 different actions 200 times. Never merged. Widened at 2 different actions 11 times. Performed 411 root evaluator evaluations with a maximum evaluation depth of 4. Performed 411 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 18 fixpoints after 6 different actions. Largest state had 5 variables. [2018-11-23 01:25:06,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:06,208 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 01:25:06,222 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 50% of their original sizes. [2018-11-23 01:25:06,222 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 01:25:06,240 INFO L415 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-11-23 01:25:06,240 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 01:25:06,240 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 01:25:06,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-11-23 01:25:06,240 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 01:25:06,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 01:25:06,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 01:25:06,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-23 01:25:06,241 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2018-11-23 01:25:06,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:06,455 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2018-11-23 01:25:06,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 01:25:06,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-11-23 01:25:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:06,457 INFO L225 Difference]: With dead ends: 87 [2018-11-23 01:25:06,457 INFO L226 Difference]: Without dead ends: 55 [2018-11-23 01:25:06,458 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-11-23 01:25:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-23 01:25:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-23 01:25:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-23 01:25:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2018-11-23 01:25:06,465 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2018-11-23 01:25:06,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:06,465 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2018-11-23 01:25:06,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 01:25:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2018-11-23 01:25:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-23 01:25:06,467 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:06,467 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:06,467 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:06,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:06,467 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2018-11-23 01:25:06,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:06,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:06,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:06,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:06,469 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-23 01:25:06,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:06,518 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:06,518 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 01:25:06,519 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 01:25:06,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:06,520 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:06,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 01:25:06,532 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 01:25:06,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 01:25:06,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:25:06,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-23 01:25:06,633 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-23 01:25:06,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:06,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2018-11-23 01:25:06,930 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:06,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 01:25:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 01:25:06,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-11-23 01:25:06,931 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 11 states. [2018-11-23 01:25:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:07,104 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2018-11-23 01:25:07,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 01:25:07,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2018-11-23 01:25:07,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:07,109 INFO L225 Difference]: With dead ends: 121 [2018-11-23 01:25:07,109 INFO L226 Difference]: Without dead ends: 76 [2018-11-23 01:25:07,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-11-23 01:25:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-23 01:25:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2018-11-23 01:25:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-23 01:25:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-11-23 01:25:07,120 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 52 [2018-11-23 01:25:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:07,120 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-11-23 01:25:07,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 01:25:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-11-23 01:25:07,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-23 01:25:07,122 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:07,122 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:07,122 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:07,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:07,122 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2018-11-23 01:25:07,122 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:07,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:07,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:25:07,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:07,126 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-23 01:25:07,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:07,174 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:07,174 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-11-23 01:25:07,174 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-23 01:25:07,176 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 01:25:07,176 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 01:25:08,076 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 01:25:08,076 INFO L272 AbstractInterpreter]: Visited 29 different actions 3929 times. Merged at 11 different actions 1050 times. Widened at 2 different actions 189 times. Performed 9241 root evaluator evaluations with a maximum evaluation depth of 4. Performed 9241 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 481 fixpoints after 9 different actions. Largest state had 5 variables. [2018-11-23 01:25:08,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:08,092 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 01:25:08,129 INFO L227 lantSequenceWeakener]: Weakened 16 states. On average, predicates are now at 56.25% of their original sizes. [2018-11-23 01:25:08,129 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 01:25:08,187 INFO L415 sIntCurrentIteration]: We unified 54 AI predicates to 54 [2018-11-23 01:25:08,187 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 01:25:08,187 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 01:25:08,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 18 [2018-11-23 01:25:08,187 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 01:25:08,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 01:25:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 01:25:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-23 01:25:08,188 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 13 states. [2018-11-23 01:25:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:08,508 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2018-11-23 01:25:08,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 01:25:08,508 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-11-23 01:25:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:08,509 INFO L225 Difference]: With dead ends: 118 [2018-11-23 01:25:08,509 INFO L226 Difference]: Without dead ends: 77 [2018-11-23 01:25:08,510 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-23 01:25:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-23 01:25:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-11-23 01:25:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-23 01:25:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2018-11-23 01:25:08,518 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2018-11-23 01:25:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:08,518 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2018-11-23 01:25:08,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 01:25:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2018-11-23 01:25:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-23 01:25:08,522 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:08,522 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:08,523 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:08,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1937391112, now seen corresponding path program 1 times [2018-11-23 01:25:08,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:08,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:08,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:08,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:08,525 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-11-23 01:25:08,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:08,626 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:08,626 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 81 with the following transitions: [2018-11-23 01:25:08,626 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-23 01:25:08,627 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 01:25:08,627 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 01:25:09,012 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 01:25:09,013 INFO L272 AbstractInterpreter]: Visited 29 different actions 2572 times. Merged at 11 different actions 587 times. Widened at 2 different actions 135 times. Performed 5789 root evaluator evaluations with a maximum evaluation depth of 4. Performed 5789 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 318 fixpoints after 9 different actions. Largest state had 5 variables. [2018-11-23 01:25:09,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:09,032 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 01:25:09,044 INFO L227 lantSequenceWeakener]: Weakened 13 states. On average, predicates are now at 50% of their original sizes. [2018-11-23 01:25:09,045 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 01:25:09,120 INFO L415 sIntCurrentIteration]: We unified 79 AI predicates to 79 [2018-11-23 01:25:09,120 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 01:25:09,120 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 01:25:09,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-11-23 01:25:09,121 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 01:25:09,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 01:25:09,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 01:25:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-23 01:25:09,122 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 13 states. [2018-11-23 01:25:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:09,552 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2018-11-23 01:25:09,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 01:25:09,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2018-11-23 01:25:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:09,553 INFO L225 Difference]: With dead ends: 141 [2018-11-23 01:25:09,553 INFO L226 Difference]: Without dead ends: 86 [2018-11-23 01:25:09,554 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-23 01:25:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-23 01:25:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-11-23 01:25:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-23 01:25:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2018-11-23 01:25:09,564 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 80 [2018-11-23 01:25:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:09,564 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2018-11-23 01:25:09,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 01:25:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2018-11-23 01:25:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-11-23 01:25:09,566 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:09,566 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:09,566 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:09,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:09,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1541382103, now seen corresponding path program 1 times [2018-11-23 01:25:09,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:09,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:09,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:09,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:09,569 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 55 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-11-23 01:25:09,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:09,631 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:09,631 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 95 with the following transitions: [2018-11-23 01:25:09,631 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-23 01:25:09,632 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 01:25:09,632 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 01:25:10,136 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 01:25:10,136 INFO L272 AbstractInterpreter]: Visited 34 different actions 4845 times. Merged at 16 different actions 1436 times. Widened at 2 different actions 189 times. Performed 11828 root evaluator evaluations with a maximum evaluation depth of 4. Performed 11828 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 615 fixpoints after 11 different actions. Largest state had 5 variables. [2018-11-23 01:25:10,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:10,138 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 01:25:10,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:10,138 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:10,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:10,151 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 01:25:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:10,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-23 01:25:10,238 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-23 01:25:10,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:10,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 13] total 17 [2018-11-23 01:25:10,815 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:10,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 01:25:10,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 01:25:10,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-11-23 01:25:10,816 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 12 states. [2018-11-23 01:25:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:10,978 INFO L93 Difference]: Finished difference Result 212 states and 335 transitions. [2018-11-23 01:25:10,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 01:25:10,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 94 [2018-11-23 01:25:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:10,979 INFO L225 Difference]: With dead ends: 212 [2018-11-23 01:25:10,979 INFO L226 Difference]: Without dead ends: 134 [2018-11-23 01:25:10,980 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 167 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2018-11-23 01:25:10,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-23 01:25:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-11-23 01:25:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-23 01:25:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-11-23 01:25:10,994 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 94 [2018-11-23 01:25:10,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:10,994 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-11-23 01:25:10,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 01:25:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-11-23 01:25:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-23 01:25:10,997 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:10,997 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:10,997 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:10,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:10,997 INFO L82 PathProgramCache]: Analyzing trace with hash 721741772, now seen corresponding path program 2 times [2018-11-23 01:25:10,997 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:10,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:10,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:10,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:10,998 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 72 proven. 54 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-11-23 01:25:11,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:11,108 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:11,108 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 01:25:11,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 01:25:11,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:11,109 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:11,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 01:25:11,115 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 01:25:11,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 01:25:11,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:25:11,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 78 proven. 17 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2018-11-23 01:25:11,162 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 78 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-23 01:25:11,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:11,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 18 [2018-11-23 01:25:11,410 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:11,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 01:25:11,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 01:25:11,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-11-23 01:25:11,411 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 15 states. [2018-11-23 01:25:11,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:11,706 INFO L93 Difference]: Finished difference Result 231 states and 386 transitions. [2018-11-23 01:25:11,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-23 01:25:11,707 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 110 [2018-11-23 01:25:11,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:11,709 INFO L225 Difference]: With dead ends: 231 [2018-11-23 01:25:11,709 INFO L226 Difference]: Without dead ends: 165 [2018-11-23 01:25:11,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 207 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2018-11-23 01:25:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-11-23 01:25:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 144. [2018-11-23 01:25:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-11-23 01:25:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 210 transitions. [2018-11-23 01:25:11,725 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 210 transitions. Word has length 110 [2018-11-23 01:25:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:11,725 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 210 transitions. [2018-11-23 01:25:11,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 01:25:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 210 transitions. [2018-11-23 01:25:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-23 01:25:11,729 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:11,729 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:11,729 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:11,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:11,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1115684886, now seen corresponding path program 3 times [2018-11-23 01:25:11,730 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:11,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:11,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:25:11,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:11,731 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 116 proven. 89 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2018-11-23 01:25:11,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:11,826 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:11,826 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 01:25:11,826 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 01:25:11,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:11,826 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:11,834 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 01:25:11,834 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 01:25:11,877 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 01:25:11,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:25:11,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 97 proven. 138 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-11-23 01:25:11,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 97 proven. 143 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2018-11-23 01:25:12,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:12,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 11] total 16 [2018-11-23 01:25:12,372 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:12,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 01:25:12,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 01:25:12,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-11-23 01:25:12,373 INFO L87 Difference]: Start difference. First operand 144 states and 210 transitions. Second operand 12 states. [2018-11-23 01:25:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:12,559 INFO L93 Difference]: Finished difference Result 302 states and 501 transitions. [2018-11-23 01:25:12,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 01:25:12,559 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 190 [2018-11-23 01:25:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:12,561 INFO L225 Difference]: With dead ends: 302 [2018-11-23 01:25:12,561 INFO L226 Difference]: Without dead ends: 178 [2018-11-23 01:25:12,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 363 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2018-11-23 01:25:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-11-23 01:25:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 151. [2018-11-23 01:25:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-23 01:25:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 212 transitions. [2018-11-23 01:25:12,573 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 212 transitions. Word has length 190 [2018-11-23 01:25:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:12,573 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 212 transitions. [2018-11-23 01:25:12,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 01:25:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 212 transitions. [2018-11-23 01:25:12,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-11-23 01:25:12,577 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:12,577 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 13, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:12,577 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:12,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:12,578 INFO L82 PathProgramCache]: Analyzing trace with hash -647256451, now seen corresponding path program 4 times [2018-11-23 01:25:12,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:12,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:12,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:25:12,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:12,579 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 213 proven. 42 refuted. 0 times theorem prover too weak. 1126 trivial. 0 not checked. [2018-11-23 01:25:12,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:12,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:12,715 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 01:25:12,715 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 01:25:12,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:12,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:12,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:12,722 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 01:25:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:12,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 173 proven. 217 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2018-11-23 01:25:12,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 171 proven. 227 refuted. 0 times theorem prover too weak. 983 trivial. 0 not checked. [2018-11-23 01:25:13,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:13,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 14] total 24 [2018-11-23 01:25:13,516 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:13,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 01:25:13,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 01:25:13,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2018-11-23 01:25:13,518 INFO L87 Difference]: Start difference. First operand 151 states and 212 transitions. Second operand 18 states. [2018-11-23 01:25:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:13,834 INFO L93 Difference]: Finished difference Result 327 states and 531 transitions. [2018-11-23 01:25:13,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-23 01:25:13,835 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 229 [2018-11-23 01:25:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:13,836 INFO L225 Difference]: With dead ends: 327 [2018-11-23 01:25:13,836 INFO L226 Difference]: Without dead ends: 173 [2018-11-23 01:25:13,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 433 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2018-11-23 01:25:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-11-23 01:25:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 163. [2018-11-23 01:25:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-23 01:25:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 233 transitions. [2018-11-23 01:25:13,846 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 233 transitions. Word has length 229 [2018-11-23 01:25:13,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:13,847 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 233 transitions. [2018-11-23 01:25:13,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 01:25:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 233 transitions. [2018-11-23 01:25:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-23 01:25:13,849 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:13,849 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:13,849 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:13,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:13,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1700665814, now seen corresponding path program 5 times [2018-11-23 01:25:13,849 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:13,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:13,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:13,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:13,850 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 182 proven. 18 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2018-11-23 01:25:13,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:13,959 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:13,959 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 01:25:13,959 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 01:25:13,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:13,959 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:13,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 01:25:13,968 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 01:25:13,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 01:25:13,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:25:14,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 214 proven. 21 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2018-11-23 01:25:14,049 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 214 proven. 21 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2018-11-23 01:25:14,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:14,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2018-11-23 01:25:14,402 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:14,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 01:25:14,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 01:25:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-11-23 01:25:14,403 INFO L87 Difference]: Start difference. First operand 163 states and 233 transitions. Second operand 14 states. [2018-11-23 01:25:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:14,624 INFO L93 Difference]: Finished difference Result 288 states and 437 transitions. [2018-11-23 01:25:14,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-23 01:25:14,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 163 [2018-11-23 01:25:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:14,627 INFO L225 Difference]: With dead ends: 288 [2018-11-23 01:25:14,627 INFO L226 Difference]: Without dead ends: 157 [2018-11-23 01:25:14,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 311 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2018-11-23 01:25:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-11-23 01:25:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2018-11-23 01:25:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-11-23 01:25:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 204 transitions. [2018-11-23 01:25:14,637 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 204 transitions. Word has length 163 [2018-11-23 01:25:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:14,637 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 204 transitions. [2018-11-23 01:25:14,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 01:25:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 204 transitions. [2018-11-23 01:25:14,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-23 01:25:14,638 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:14,639 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:14,639 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:14,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 6 times [2018-11-23 01:25:14,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:14,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:14,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:25:14,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:14,640 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-23 01:25:15,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:15,004 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:15,004 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 01:25:15,004 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 01:25:15,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:15,004 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:15,010 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 01:25:15,011 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 01:25:15,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 01:25:15,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:25:15,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-23 01:25:15,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-23 01:25:16,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:16,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2018-11-23 01:25:16,111 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:16,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-23 01:25:16,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-23 01:25:16,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 01:25:16,112 INFO L87 Difference]: Start difference. First operand 150 states and 204 transitions. Second operand 36 states. [2018-11-23 01:25:16,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:16,541 INFO L93 Difference]: Finished difference Result 249 states and 363 transitions. [2018-11-23 01:25:16,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-23 01:25:16,542 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2018-11-23 01:25:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:16,544 INFO L225 Difference]: With dead ends: 249 [2018-11-23 01:25:16,544 INFO L226 Difference]: Without dead ends: 242 [2018-11-23 01:25:16,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 344 SyntacticMatches, 28 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 01:25:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-11-23 01:25:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 176. [2018-11-23 01:25:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-11-23 01:25:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 250 transitions. [2018-11-23 01:25:16,561 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 250 transitions. Word has length 177 [2018-11-23 01:25:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:16,562 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 250 transitions. [2018-11-23 01:25:16,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-23 01:25:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 250 transitions. [2018-11-23 01:25:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-23 01:25:16,563 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:16,564 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:16,564 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:16,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:16,564 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 7 times [2018-11-23 01:25:16,564 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:16,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:16,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:25:16,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:16,565 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 267 proven. 35 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-11-23 01:25:16,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:16,686 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:16,686 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 01:25:16,686 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 01:25:16,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:16,686 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:16,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:16,699 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 01:25:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:16,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 211 proven. 47 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2018-11-23 01:25:16,858 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 210 proven. 52 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2018-11-23 01:25:17,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:17,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 12] total 23 [2018-11-23 01:25:17,363 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:17,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 01:25:17,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 01:25:17,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2018-11-23 01:25:17,364 INFO L87 Difference]: Start difference. First operand 176 states and 250 transitions. Second operand 18 states. [2018-11-23 01:25:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:17,638 INFO L93 Difference]: Finished difference Result 381 states and 599 transitions. [2018-11-23 01:25:17,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 01:25:17,638 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 191 [2018-11-23 01:25:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:17,641 INFO L225 Difference]: With dead ends: 381 [2018-11-23 01:25:17,641 INFO L226 Difference]: Without dead ends: 242 [2018-11-23 01:25:17,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 363 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2018-11-23 01:25:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-11-23 01:25:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 223. [2018-11-23 01:25:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-11-23 01:25:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 312 transitions. [2018-11-23 01:25:17,660 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 312 transitions. Word has length 191 [2018-11-23 01:25:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:17,661 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 312 transitions. [2018-11-23 01:25:17,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 01:25:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 312 transitions. [2018-11-23 01:25:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-23 01:25:17,663 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:17,663 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:17,663 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:17,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:17,664 INFO L82 PathProgramCache]: Analyzing trace with hash -712647889, now seen corresponding path program 8 times [2018-11-23 01:25:17,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:17,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:17,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:17,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:17,665 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 210 proven. 60 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2018-11-23 01:25:17,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:17,733 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:17,733 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 01:25:17,733 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 01:25:17,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:17,733 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:17,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 01:25:17,739 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 01:25:17,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-23 01:25:17,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:25:17,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 357 proven. 4 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2018-11-23 01:25:17,829 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 207 proven. 27 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2018-11-23 01:25:18,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:18,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2018-11-23 01:25:18,099 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:18,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 01:25:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 01:25:18,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-11-23 01:25:18,100 INFO L87 Difference]: Start difference. First operand 223 states and 312 transitions. Second operand 13 states. [2018-11-23 01:25:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:18,231 INFO L93 Difference]: Finished difference Result 433 states and 621 transitions. [2018-11-23 01:25:18,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 01:25:18,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 178 [2018-11-23 01:25:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:18,234 INFO L225 Difference]: With dead ends: 433 [2018-11-23 01:25:18,234 INFO L226 Difference]: Without dead ends: 249 [2018-11-23 01:25:18,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 347 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2018-11-23 01:25:18,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-11-23 01:25:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 216. [2018-11-23 01:25:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-11-23 01:25:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 303 transitions. [2018-11-23 01:25:18,252 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 303 transitions. Word has length 178 [2018-11-23 01:25:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:18,252 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 303 transitions. [2018-11-23 01:25:18,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 01:25:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 303 transitions. [2018-11-23 01:25:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-23 01:25:18,254 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:18,254 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:18,254 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:18,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:18,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1006786053, now seen corresponding path program 9 times [2018-11-23 01:25:18,255 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:18,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:18,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:25:18,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:18,256 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 90 proven. 118 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2018-11-23 01:25:18,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:18,318 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:18,319 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 01:25:18,319 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 01:25:18,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:18,319 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:18,325 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 01:25:18,325 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 01:25:18,346 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 01:25:18,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:25:18,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 88 proven. 182 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2018-11-23 01:25:18,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 92 proven. 186 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2018-11-23 01:25:18,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:18,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 13] total 18 [2018-11-23 01:25:18,971 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:18,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 01:25:18,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 01:25:18,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-11-23 01:25:18,972 INFO L87 Difference]: Start difference. First operand 216 states and 303 transitions. Second operand 13 states. [2018-11-23 01:25:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:19,184 INFO L93 Difference]: Finished difference Result 494 states and 764 transitions. [2018-11-23 01:25:19,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 01:25:19,184 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 178 [2018-11-23 01:25:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:19,185 INFO L225 Difference]: With dead ends: 494 [2018-11-23 01:25:19,185 INFO L226 Difference]: Without dead ends: 171 [2018-11-23 01:25:19,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 335 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2018-11-23 01:25:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-11-23 01:25:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2018-11-23 01:25:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-23 01:25:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 216 transitions. [2018-11-23 01:25:19,200 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 216 transitions. Word has length 178 [2018-11-23 01:25:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:19,201 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 216 transitions. [2018-11-23 01:25:19,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 01:25:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 216 transitions. [2018-11-23 01:25:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-23 01:25:19,202 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:25:19,203 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 12, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:25:19,203 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:25:19,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:25:19,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1673740410, now seen corresponding path program 10 times [2018-11-23 01:25:19,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 01:25:19,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:19,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:25:19,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:25:19,204 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 01:25:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 103 proven. 320 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2018-11-23 01:25:19,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:19,336 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 01:25:19,336 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 01:25:19,336 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 01:25:19,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:25:19,336 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:25:19,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:25:19,343 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 01:25:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:25:19,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:25:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 107 proven. 314 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2018-11-23 01:25:19,405 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 01:25:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 105 proven. 330 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2018-11-23 01:25:20,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 01:25:20,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 16] total 22 [2018-11-23 01:25:20,170 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 01:25:20,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 01:25:20,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 01:25:20,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-11-23 01:25:20,171 INFO L87 Difference]: Start difference. First operand 165 states and 216 transitions. Second operand 15 states. [2018-11-23 01:25:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:25:20,306 INFO L93 Difference]: Finished difference Result 196 states and 257 transitions. [2018-11-23 01:25:20,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 01:25:20,307 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 217 [2018-11-23 01:25:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:25:20,307 INFO L225 Difference]: With dead ends: 196 [2018-11-23 01:25:20,307 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 01:25:20,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 416 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2018-11-23 01:25:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 01:25:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 01:25:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 01:25:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 01:25:20,310 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 217 [2018-11-23 01:25:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:25:20,310 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 01:25:20,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 01:25:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 01:25:20,310 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 01:25:20,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 01:25:20,502 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,502 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,505 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,508 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,511 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,582 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,583 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,585 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,589 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,591 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,614 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,641 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,641 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,681 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,683 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,684 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,686 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,687 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,691 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,747 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,774 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,836 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,842 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,857 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,858 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,860 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,860 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,861 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,862 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,867 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,875 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,877 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,883 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,888 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,893 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,899 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,905 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,919 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,928 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,935 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,936 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,938 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,939 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,940 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,941 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,947 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,948 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,950 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,951 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,952 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,953 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,959 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,960 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,962 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,963 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,963 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,964 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,973 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,974 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,976 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,977 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,985 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,987 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:20,987 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,006 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,010 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,018 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,019 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,022 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,023 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,033 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,041 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,049 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,050 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,056 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,057 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,059 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,060 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,066 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,068 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,073 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,074 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,076 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,077 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,082 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,088 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,089 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,091 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,092 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,093 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,094 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,101 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,102 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,104 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,104 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,105 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,106 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,112 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,119 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,126 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,127 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,132 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,134 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,140 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,141 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,143 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,144 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,150 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,151 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,153 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,154 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,161 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,164 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,164 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,171 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,172 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,174 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,175 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,182 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,191 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,192 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,194 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,194 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,202 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,212 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,216 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,217 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,228 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,229 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,236 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,242 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,247 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,252 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,271 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,284 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,294 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,296 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,303 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,310 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,320 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 01:25:21,640 WARN L180 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 30 [2018-11-23 01:25:21,880 WARN L180 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 32 [2018-11-23 01:25:21,882 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 01:25:21,882 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 01:25:21,882 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 01:25:21,882 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 01:25:21,882 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 01:25:21,882 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 01:25:21,882 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-23 01:25:21,882 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-23 01:25:21,883 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-23 01:25:21,883 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-23 01:25:21,883 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-23 01:25:21,883 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-23 01:25:21,883 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2018-11-23 01:25:21,883 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-23 01:25:21,883 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-23 01:25:21,883 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-23 01:25:21,883 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (< 1 |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n)) [2018-11-23 01:25:21,883 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-23 01:25:21,883 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (or (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) (not (= |fibo2_#in~n| 5))) (<= fibo2_~n |fibo2_#in~n|) (or (<= 5 |fibo2_#in~n|) (<= fibo2_~n 3) (and (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|))) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n) (or (<= 4 fibo2_~n) (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)))) [2018-11-23 01:25:21,883 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-23 01:25:21,883 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-23 01:25:21,884 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-23 01:25:21,884 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-23 01:25:21,884 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-23 01:25:21,884 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-23 01:25:21,884 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-23 01:25:21,884 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-23 01:25:21,884 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (or (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|)) (not (= |fibo1_#in~n| 6))) (or (not (= |fibo1_#in~n| 4)) (<= 2 |fibo1_#t~ret0|)) (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 5 |fibo1_#in~n|)) (and .cse0 (<= |fibo1_#t~ret0| 2) (<= 4 fibo1_~n)) (and .cse0 (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1)))) (< 1 |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-23 01:25:21,884 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-23 01:25:21,884 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-23 01:25:21,884 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-23 01:25:21,884 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-23 01:25:21,884 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-23 01:25:21,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:25:21 BoogieIcfgContainer [2018-11-23 01:25:21,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 01:25:21,887 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 01:25:21,887 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 01:25:21,887 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 01:25:21,889 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:25:05" (3/4) ... [2018-11-23 01:25:21,892 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 01:25:21,896 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 01:25:21,896 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 01:25:21,897 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-23 01:25:21,897 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-23 01:25:21,900 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 01:25:21,900 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 01:25:21,900 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 01:25:21,927 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_526c379f-0dd4-4e8e-ac7c-3ef2621659a4/bin-2019/utaipan/witness.graphml [2018-11-23 01:25:21,927 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 01:25:21,928 INFO L168 Benchmark]: Toolchain (without parser) took 17041.53 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 738.2 MB). Free memory was 959.1 MB in the beginning and 1.2 GB in the end (delta: -252.2 MB). Peak memory consumption was 486.0 MB. Max. memory is 11.5 GB. [2018-11-23 01:25:21,929 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:25:21,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 161.71 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 01:25:21,929 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.56 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 01:25:21,929 INFO L168 Benchmark]: Boogie Preprocessor took 10.48 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:25:21,930 INFO L168 Benchmark]: RCFGBuilder took 173.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -167.5 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2018-11-23 01:25:21,930 INFO L168 Benchmark]: TraceAbstraction took 16640.80 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 610.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -115.6 MB). Peak memory consumption was 898.6 MB. Max. memory is 11.5 GB. [2018-11-23 01:25:21,930 INFO L168 Benchmark]: Witness Printer took 40.75 ms. Allocated memory is still 1.8 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. [2018-11-23 01:25:21,932 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 161.71 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.56 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.48 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 173.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -167.5 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 16640.80 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 610.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -115.6 MB). Peak memory consumption was 898.6 MB. Max. memory is 11.5 GB. * Witness Printer took 40.75 ms. Allocated memory is still 1.8 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 16.5s OverallTime, 17 OverallIterations, 17 TraceHistogramMax, 3.8s AutomataDifference, 0.0s DeadEndRemovalTime, 1.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 627 SDtfs, 645 SDslu, 5491 SDs, 0 SdLazy, 4039 SolverSat, 511 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 4022 GetRequests, 3547 SyntacticMatches, 125 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.0s AbstIntTime, 5 AbstIntIterations, 4 AbstIntStrong, 0.8596938775510204 AbsIntWeakeningRatio, 0.5714285714285714 AbsIntAvgWeakeningVarsNumRemoved, 0.20408163265306123 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 255 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 908 PreInvPairs, 2161 NumberOfFragments, 140 HoareAnnotationTreeSize, 908 FomulaSimplifications, 172908 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 11 FomulaSimplificationsInter, 5439 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 3785 NumberOfCodeBlocks, 3458 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 5525 ConstructedInterpolants, 0 QuantifiedInterpolants, 1659135 SizeOfPredicates, 55 NumberOfNonLiveVariables, 3197 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 39 InterpolantComputations, 2 PerfectInterpolantSequences, 20558/24259 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...