./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/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 c7b71b458b3f08f188a62c7539b715f43fd7f97d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 03:17:53,462 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 03:17:53,464 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 03:17:53,472 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 03:17:53,472 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 03:17:53,472 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 03:17:53,473 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 03:17:53,474 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 03:17:53,475 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 03:17:53,476 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 03:17:53,477 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 03:17:53,477 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 03:17:53,477 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 03:17:53,478 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 03:17:53,479 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 03:17:53,479 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 03:17:53,479 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 03:17:53,480 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 03:17:53,482 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 03:17:53,482 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 03:17:53,483 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 03:17:53,484 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 03:17:53,485 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 03:17:53,485 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 03:17:53,486 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 03:17:53,486 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 03:17:53,487 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 03:17:53,487 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 03:17:53,487 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 03:17:53,488 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 03:17:53,488 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 03:17:53,488 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 03:17:53,488 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 03:17:53,489 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 03:17:53,489 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 03:17:53,489 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 03:17:53,489 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-03 03:17:53,497 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 03:17:53,498 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 03:17:53,498 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 03:17:53,498 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 03:17:53,499 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 03:17:53,499 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 03:17:53,499 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 03:17:53,499 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 03:17:53,499 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 03:17:53,499 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 03:17:53,500 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 03:17:53,500 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 03:17:53,500 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 03:17:53,500 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 03:17:53,501 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 03:17:53,501 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 03:17:53,501 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 03:17:53,501 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 03:17:53,501 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 03:17:53,501 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 03:17:53,502 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 03:17:53,502 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 03:17:53,502 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 03:17:53,502 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 03:17:53,502 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 03:17:53,502 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 03:17:53,502 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 03:17:53,503 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 03:17:53,503 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 03:17:53,503 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 03:17:53,503 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 03:17:53,503 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 03:17:53,503 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 03:17:53,503 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 03:17:53,504 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 03:17:53,504 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 03:17:53,504 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_c42f13d2-6987-4dcc-b474-489802a9fc9d/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 -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2018-12-03 03:17:53,521 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 03:17:53,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 03:17:53,530 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 03:17:53,531 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 03:17:53,531 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 03:17:53,532 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-12-03 03:17:53,570 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/data/ad9e6fba9/9eca4ffaf8664c6c806e63b5356ba04f/FLAG60dd6834a [2018-12-03 03:17:53,953 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 03:17:53,953 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-12-03 03:17:53,956 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/data/ad9e6fba9/9eca4ffaf8664c6c806e63b5356ba04f/FLAG60dd6834a [2018-12-03 03:17:53,965 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/data/ad9e6fba9/9eca4ffaf8664c6c806e63b5356ba04f [2018-12-03 03:17:53,967 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 03:17:53,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 03:17:53,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 03:17:53,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 03:17:53,971 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 03:17:53,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 03:17:53" (1/1) ... [2018-12-03 03:17:53,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d01f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:53, skipping insertion in model container [2018-12-03 03:17:53,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 03:17:53" (1/1) ... [2018-12-03 03:17:53,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 03:17:53,987 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 03:17:54,082 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 03:17:54,085 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 03:17:54,094 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 03:17:54,103 INFO L195 MainTranslator]: Completed translation [2018-12-03 03:17:54,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54 WrapperNode [2018-12-03 03:17:54,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 03:17:54,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 03:17:54,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 03:17:54,104 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 03:17:54,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (1/1) ... [2018-12-03 03:17:54,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (1/1) ... [2018-12-03 03:17:54,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 03:17:54,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 03:17:54,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 03:17:54,116 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 03:17:54,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (1/1) ... [2018-12-03 03:17:54,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (1/1) ... [2018-12-03 03:17:54,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (1/1) ... [2018-12-03 03:17:54,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (1/1) ... [2018-12-03 03:17:54,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (1/1) ... [2018-12-03 03:17:54,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (1/1) ... [2018-12-03 03:17:54,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (1/1) ... [2018-12-03 03:17:54,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 03:17:54,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 03:17:54,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 03:17:54,128 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 03:17:54,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/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 [2018-12-03 03:17:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 03:17:54,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 03:17:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 03:17:54,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 03:17:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 03:17:54,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 03:17:54,191 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-12-03 03:17:54,191 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-12-03 03:17:54,269 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 03:17:54,269 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 03:17:54,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:17:54 BoogieIcfgContainer [2018-12-03 03:17:54,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 03:17:54,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 03:17:54,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 03:17:54,271 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 03:17:54,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 03:17:53" (1/3) ... [2018-12-03 03:17:54,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a99159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:17:54, skipping insertion in model container [2018-12-03 03:17:54,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:17:54" (2/3) ... [2018-12-03 03:17:54,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a99159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:17:54, skipping insertion in model container [2018-12-03 03:17:54,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:17:54" (3/3) ... [2018-12-03 03:17:54,273 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5_true-unreach-call_true-termination.c [2018-12-03 03:17:54,279 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 03:17:54,283 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 03:17:54,292 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 03:17:54,310 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 03:17:54,310 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 03:17:54,310 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 03:17:54,310 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 03:17:54,310 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 03:17:54,310 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 03:17:54,310 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 03:17:54,310 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 03:17:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-03 03:17:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 03:17:54,323 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:17:54,324 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:17:54,325 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:17:54,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-12-03 03:17:54,329 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 03:17:54,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:54,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:17:54,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:54,357 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 03:17:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 03:17:54,420 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 03:17:54,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 03:17:54,420 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 03:17:54,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 03:17:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 03:17:54,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 03:17:54,432 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-12-03 03:17:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:17:54,490 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-12-03 03:17:54,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 03:17:54,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-03 03:17:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:17:54,498 INFO L225 Difference]: With dead ends: 35 [2018-12-03 03:17:54,498 INFO L226 Difference]: Without dead ends: 21 [2018-12-03 03:17:54,500 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 [2018-12-03 03:17:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-03 03:17:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-03 03:17:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-03 03:17:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-03 03:17:54,524 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-12-03 03:17:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:17:54,524 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-03 03:17:54,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 03:17:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-03 03:17:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-03 03:17:54,526 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:17:54,526 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:17:54,526 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:17:54,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:54,527 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-12-03 03:17:54,527 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 03:17:54,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:54,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:17:54,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:54,528 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 03:17:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 03:17:54,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 03:17:54,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 03:17:54,557 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 03:17:54,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 03:17:54,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 03:17:54,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 03:17:54,558 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-12-03 03:17:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:17:54,591 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-12-03 03:17:54,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 03:17:54,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-03 03:17:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:17:54,592 INFO L225 Difference]: With dead ends: 27 [2018-12-03 03:17:54,592 INFO L226 Difference]: Without dead ends: 23 [2018-12-03 03:17:54,593 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 [2018-12-03 03:17:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-03 03:17:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-12-03 03:17:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-03 03:17:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-03 03:17:54,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-12-03 03:17:54,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:17:54,599 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-03 03:17:54,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 03:17:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-03 03:17:54,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-03 03:17:54,600 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:17:54,600 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:17:54,601 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:17:54,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-12-03 03:17:54,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 03:17:54,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:54,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:17:54,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:54,602 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 03:17:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-03 03:17:54,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:54,660 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 03:17:54,660 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-03 03:17:54,661 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [33], [34], [36], [37], [38], [39], [40], [41] [2018-12-03 03:17:54,681 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 03:17:54,682 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 03:17:54,787 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 03:17:54,788 INFO L272 AbstractInterpreter]: Visited 17 different actions 92 times. Never merged. Widened at 1 different actions 4 times. Performed 188 root evaluator evaluations with a maximum evaluation depth of 3. Performed 188 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 6 fixpoints after 3 different actions. Largest state had 5 variables. [2018-12-03 03:17:54,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:54,792 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 03:17:54,816 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-12-03 03:17:54,816 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 03:17:54,829 INFO L418 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-12-03 03:17:54,829 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 03:17:54,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 03:17:54,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-12-03 03:17:54,830 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 03:17:54,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 03:17:54,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 03:17:54,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-03 03:17:54,830 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2018-12-03 03:17:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:17:54,949 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2018-12-03 03:17:54,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 03:17:54,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-12-03 03:17:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:17:54,950 INFO L225 Difference]: With dead ends: 54 [2018-12-03 03:17:54,950 INFO L226 Difference]: Without dead ends: 39 [2018-12-03 03:17:54,950 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 [2018-12-03 03:17:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-03 03:17:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-03 03:17:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-03 03:17:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2018-12-03 03:17:54,955 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2018-12-03 03:17:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:17:54,955 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2018-12-03 03:17:54,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 03:17:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2018-12-03 03:17:54,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-03 03:17:54,956 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:17:54,956 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:17:54,956 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:17:54,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:54,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2018-12-03 03:17:54,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 03:17:54,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:54,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:17:54,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:54,958 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 03:17:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-03 03:17:55,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:55,005 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 03:17:55,005 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 03:17:55,006 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 03:17:55,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:55,006 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/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 [2018-12-03 03:17:55,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 03:17:55,013 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 03:17:55,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-03 03:17:55,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 03:17:55,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:17:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-03 03:17:55,060 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 03:17:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-03 03:17:55,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 03:17:55,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2018-12-03 03:17:55,192 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 03:17:55,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 03:17:55,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 03:17:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-03 03:17:55,193 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2018-12-03 03:17:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:17:55,272 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2018-12-03 03:17:55,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 03:17:55,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2018-12-03 03:17:55,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:17:55,273 INFO L225 Difference]: With dead ends: 73 [2018-12-03 03:17:55,273 INFO L226 Difference]: Without dead ends: 47 [2018-12-03 03:17:55,274 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2018-12-03 03:17:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-03 03:17:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2018-12-03 03:17:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-03 03:17:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-12-03 03:17:55,279 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 39 [2018-12-03 03:17:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:17:55,279 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-12-03 03:17:55,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 03:17:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-12-03 03:17:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-03 03:17:55,280 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:17:55,281 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:17:55,281 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:17:55,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:55,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 1 times [2018-12-03 03:17:55,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 03:17:55,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:55,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 03:17:55,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:55,282 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 03:17:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 03:17:55,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:55,312 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 03:17:55,312 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2018-12-03 03:17:55,312 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [33], [34], [36], [37], [38], [39], [40], [41] [2018-12-03 03:17:55,313 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 03:17:55,314 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 03:17:55,500 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 03:17:55,500 INFO L272 AbstractInterpreter]: Visited 22 different actions 517 times. Merged at 10 different actions 108 times. Widened at 1 different actions 8 times. Performed 1268 root evaluator evaluations with a maximum evaluation depth of 3. Performed 1268 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 27 fixpoints after 6 different actions. Largest state had 5 variables. [2018-12-03 03:17:55,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:55,504 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 03:17:55,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:55,504 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/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 [2018-12-03 03:17:55,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:17:55,510 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 03:17:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:55,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:17:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-03 03:17:55,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 03:17:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-12-03 03:17:55,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 03:17:55,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 11 [2018-12-03 03:17:55,764 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 03:17:55,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 03:17:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 03:17:55,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-12-03 03:17:55,765 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2018-12-03 03:17:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:17:55,821 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2018-12-03 03:17:55,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 03:17:55,822 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-12-03 03:17:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:17:55,823 INFO L225 Difference]: With dead ends: 70 [2018-12-03 03:17:55,823 INFO L226 Difference]: Without dead ends: 56 [2018-12-03 03:17:55,823 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-03 03:17:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-03 03:17:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2018-12-03 03:17:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-03 03:17:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2018-12-03 03:17:55,830 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 41 [2018-12-03 03:17:55,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:17:55,830 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2018-12-03 03:17:55,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 03:17:55,830 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2018-12-03 03:17:55,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-03 03:17:55,831 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:17:55,831 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:17:55,831 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:17:55,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:55,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1437629917, now seen corresponding path program 2 times [2018-12-03 03:17:55,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 03:17:55,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:55,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:17:55,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:55,833 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 03:17:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 47 proven. 43 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-12-03 03:17:55,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:55,908 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 03:17:55,908 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 03:17:55,908 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 03:17:55,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:55,908 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/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 [2018-12-03 03:17:55,914 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 03:17:55,914 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 03:17:55,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-03 03:17:55,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 03:17:55,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:17:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-12-03 03:17:55,978 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 03:17:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-12-03 03:17:56,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 03:17:56,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 16 [2018-12-03 03:17:56,158 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 03:17:56,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 03:17:56,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 03:17:56,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-12-03 03:17:56,159 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 13 states. [2018-12-03 03:17:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:17:56,350 INFO L93 Difference]: Finished difference Result 98 states and 144 transitions. [2018-12-03 03:17:56,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 03:17:56,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2018-12-03 03:17:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:17:56,352 INFO L225 Difference]: With dead ends: 98 [2018-12-03 03:17:56,352 INFO L226 Difference]: Without dead ends: 68 [2018-12-03 03:17:56,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2018-12-03 03:17:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-03 03:17:56,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2018-12-03 03:17:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-03 03:17:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2018-12-03 03:17:56,359 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 67 [2018-12-03 03:17:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:17:56,359 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2018-12-03 03:17:56,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 03:17:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2018-12-03 03:17:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-12-03 03:17:56,361 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:17:56,361 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:17:56,361 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:17:56,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:56,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-12-03 03:17:56,361 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 03:17:56,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:56,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 03:17:56,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:56,362 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 03:17:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-12-03 03:17:56,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:56,435 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 03:17:56,435 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 03:17:56,435 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 03:17:56,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:56,435 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/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 [2018-12-03 03:17:56,441 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 03:17:56,441 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 03:17:56,454 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 03:17:56,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 03:17:56,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:17:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-12-03 03:17:56,512 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 03:17:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2018-12-03 03:17:56,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 03:17:56,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 11] total 19 [2018-12-03 03:17:56,844 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 03:17:56,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 03:17:56,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 03:17:56,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2018-12-03 03:17:56,845 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand 15 states. [2018-12-03 03:17:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:17:57,042 INFO L93 Difference]: Finished difference Result 132 states and 201 transitions. [2018-12-03 03:17:57,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 03:17:57,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2018-12-03 03:17:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:17:57,043 INFO L225 Difference]: With dead ends: 132 [2018-12-03 03:17:57,043 INFO L226 Difference]: Without dead ends: 76 [2018-12-03 03:17:57,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 176 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2018-12-03 03:17:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-03 03:17:57,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2018-12-03 03:17:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-03 03:17:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2018-12-03 03:17:57,049 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 96 [2018-12-03 03:17:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:17:57,050 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2018-12-03 03:17:57,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 03:17:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2018-12-03 03:17:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-12-03 03:17:57,051 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:17:57,051 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:17:57,051 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:17:57,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:57,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 4 times [2018-12-03 03:17:57,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 03:17:57,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:57,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 03:17:57,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:57,052 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 03:17:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-12-03 03:17:57,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:57,214 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 03:17:57,215 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 03:17:57,215 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 03:17:57,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:57,215 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/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 [2018-12-03 03:17:57,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:17:57,221 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 03:17:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:57,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:17:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-12-03 03:17:57,334 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 03:17:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-12-03 03:17:57,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 03:17:57,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 20 [2018-12-03 03:17:57,728 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 03:17:57,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-03 03:17:57,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-03 03:17:57,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-12-03 03:17:57,729 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 20 states. [2018-12-03 03:17:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:17:57,824 INFO L93 Difference]: Finished difference Result 95 states and 132 transitions. [2018-12-03 03:17:57,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 03:17:57,825 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2018-12-03 03:17:57,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:17:57,826 INFO L225 Difference]: With dead ends: 95 [2018-12-03 03:17:57,826 INFO L226 Difference]: Without dead ends: 88 [2018-12-03 03:17:57,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 214 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-12-03 03:17:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-03 03:17:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2018-12-03 03:17:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-12-03 03:17:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2018-12-03 03:17:57,836 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 109 [2018-12-03 03:17:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:17:57,836 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2018-12-03 03:17:57,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-03 03:17:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2018-12-03 03:17:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-12-03 03:17:57,838 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:17:57,838 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:17:57,839 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:17:57,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:57,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2018-12-03 03:17:57,839 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 03:17:57,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:57,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:17:57,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:57,840 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 03:17:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 241 proven. 102 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2018-12-03 03:17:57,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:57,937 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 03:17:57,937 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 03:17:57,938 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 03:17:57,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:57,938 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/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 [2018-12-03 03:17:57,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 03:17:57,943 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 03:17:57,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-03 03:17:57,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 03:17:57,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:17:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 259 proven. 59 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-12-03 03:17:57,978 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 03:17:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 259 proven. 73 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2018-12-03 03:17:58,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 03:17:58,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 11] total 16 [2018-12-03 03:17:58,277 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 03:17:58,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 03:17:58,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 03:17:58,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-12-03 03:17:58,277 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 12 states. [2018-12-03 03:17:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:17:58,377 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2018-12-03 03:17:58,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 03:17:58,377 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2018-12-03 03:17:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:17:58,378 INFO L225 Difference]: With dead ends: 95 [2018-12-03 03:17:58,378 INFO L226 Difference]: Without dead ends: 67 [2018-12-03 03:17:58,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 261 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2018-12-03 03:17:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-03 03:17:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-03 03:17:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-03 03:17:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2018-12-03 03:17:58,383 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 136 [2018-12-03 03:17:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:17:58,383 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2018-12-03 03:17:58,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 03:17:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2018-12-03 03:17:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-12-03 03:17:58,384 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:17:58,384 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:17:58,384 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:17:58,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:17:58,385 INFO L82 PathProgramCache]: Analyzing trace with hash -344605238, now seen corresponding path program 6 times [2018-12-03 03:17:58,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 03:17:58,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:58,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 03:17:58,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 03:17:58,385 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 03:17:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:17:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 127 proven. 275 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-12-03 03:17:58,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:58,451 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 03:17:58,451 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 03:17:58,451 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 03:17:58,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 03:17:58,451 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/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 [2018-12-03 03:17:58,457 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 03:17:58,457 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 03:17:58,470 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 03:17:58,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 03:17:58,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:17:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 135 proven. 263 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2018-12-03 03:17:58,494 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 03:17:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 289 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2018-12-03 03:17:58,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 03:17:58,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14] total 19 [2018-12-03 03:17:58,979 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 03:17:58,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 03:17:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 03:17:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2018-12-03 03:17:58,979 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 13 states. [2018-12-03 03:17:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:17:59,047 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2018-12-03 03:17:59,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 03:17:59,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2018-12-03 03:17:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:17:59,047 INFO L225 Difference]: With dead ends: 80 [2018-12-03 03:17:59,047 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 03:17:59,048 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 257 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2018-12-03 03:17:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 03:17:59,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 03:17:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 03:17:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 03:17:59,048 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2018-12-03 03:17:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:17:59,048 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 03:17:59,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 03:17:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 03:17:59,049 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 03:17:59,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 03:17:59,093 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 03:17:59,096 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 03:17:59,122 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 03:17:59,127 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 03:17:59,395 WARN L180 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2018-12-03 03:17:59,435 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-03 03:17:59,435 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-03 03:17:59,435 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-03 03:17:59,435 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-03 03:17:59,435 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-03 03:17:59,435 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-03 03:17:59,435 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-12-03 03:17:59,435 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-12-03 03:17:59,435 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-12-03 03:17:59,435 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= 5 main_~x~0) (<= main_~x~0 5)) [2018-12-03 03:17:59,435 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-12-03 03:17:59,435 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-12-03 03:17:59,435 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-12-03 03:17:59,435 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-12-03 03:17:59,436 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-12-03 03:17:59,436 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-12-03 03:17:59,436 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-12-03 03:17:59,436 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-12-03 03:17:59,436 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-03 03:17:59,436 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (and (let ((.cse0 (<= |fibo_#t~ret0| 1)) (.cse1 (<= 1 |fibo_#t~ret0|)) (.cse2 (<= |fibo_#in~n| fibo_~n))) (or (and (<= |fibo_#in~n| 2) .cse0 .cse1) (and (<= 5 |fibo_#in~n|) .cse2) (and .cse0 (<= |fibo_#in~n| 3) .cse1 (<= 3 fibo_~n)) (and (<= 4 |fibo_#in~n|) .cse2 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)))) (<= fibo_~n |fibo_#in~n|) (or (not (= |fibo_#in~n| 5)) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3))) (< 1 fibo_~n)) [2018-12-03 03:17:59,436 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-12-03 03:17:59,436 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-12-03 03:17:59,436 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-12-03 03:17:59,436 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-12-03 03:17:59,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 03:17:59 BoogieIcfgContainer [2018-12-03 03:17:59,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 03:17:59,438 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 03:17:59,438 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 03:17:59,438 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 03:17:59,438 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:17:54" (3/4) ... [2018-12-03 03:17:59,440 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 03:17:59,444 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 03:17:59,444 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 03:17:59,444 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-12-03 03:17:59,446 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-03 03:17:59,446 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-03 03:17:59,446 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 03:17:59,468 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c42f13d2-6987-4dcc-b474-489802a9fc9d/bin-2019/utaipan/witness.graphml [2018-12-03 03:17:59,468 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 03:17:59,469 INFO L168 Benchmark]: Toolchain (without parser) took 5500.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 186.6 MB). Free memory was 949.7 MB in the beginning and 1.1 GB in the end (delta: -198.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 03:17:59,469 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 03:17:59,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 134.62 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 03:17:59,469 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.35 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 03:17:59,470 INFO L168 Benchmark]: Boogie Preprocessor took 11.30 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 03:17:59,470 INFO L168 Benchmark]: RCFGBuilder took 141.46 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 939.0 MB in the beginning and 1.1 GB in the end (delta: -143.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2018-12-03 03:17:59,470 INFO L168 Benchmark]: TraceAbstraction took 5168.16 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 90.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -66.5 MB). Peak memory consumption was 363.3 MB. Max. memory is 11.5 GB. [2018-12-03 03:17:59,470 INFO L168 Benchmark]: Witness Printer took 30.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 442.4 kB). Peak memory consumption was 442.4 kB. Max. memory is 11.5 GB. [2018-12-03 03:17:59,471 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 134.62 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 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 12.35 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.30 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 141.46 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 939.0 MB in the beginning and 1.1 GB in the end (delta: -143.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5168.16 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 90.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -66.5 MB). Peak memory consumption was 363.3 MB. Max. memory is 11.5 GB. * Witness Printer took 30.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 442.4 kB). Peak memory consumption was 442.4 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 5.1s OverallTime, 10 OverallIterations, 19 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 236 SDtfs, 285 SDslu, 979 SDs, 0 SdLazy, 863 SolverSat, 268 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 1415 GetRequests, 1197 SyntacticMatches, 66 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 2 AbstIntIterations, 1 AbstIntStrong, 0.84 AbsIntWeakeningRatio, 0.56 AbsIntAvgWeakeningVarsNumRemoved, 0.16 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 125 PreInvPairs, 218 NumberOfFragments, 86 HoareAnnotationTreeSize, 125 FomulaSimplifications, 4817 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 980 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 1301 NumberOfCodeBlocks, 1182 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1901 ConstructedInterpolants, 0 QuantifiedInterpolants, 430912 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1100 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 24 InterpolantComputations, 2 PerfectInterpolantSequences, 7259/9435 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...