./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 595c6555624af5bbcf79585a20acb2500e3eeee8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 16:25:55,970 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 16:25:55,971 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 16:25:55,977 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 16:25:55,977 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 16:25:55,978 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 16:25:55,979 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 16:25:55,979 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 16:25:55,980 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 16:25:55,981 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 16:25:55,981 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 16:25:55,981 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 16:25:55,982 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 16:25:55,982 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 16:25:55,983 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 16:25:55,983 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 16:25:55,984 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 16:25:55,985 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 16:25:55,986 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 16:25:55,986 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 16:25:55,987 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 16:25:55,988 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 16:25:55,989 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 16:25:55,989 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 16:25:55,989 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 16:25:55,989 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 16:25:55,990 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 16:25:55,990 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 16:25:55,991 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 16:25:55,991 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 16:25:55,991 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 16:25:55,992 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 16:25:55,992 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 16:25:55,992 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 16:25:55,992 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 16:25:55,993 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 16:25:55,993 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 16:25:56,000 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 16:25:56,000 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 16:25:56,001 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 16:25:56,001 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 16:25:56,001 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 16:25:56,001 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 16:25:56,001 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 16:25:56,001 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 16:25:56,002 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 16:25:56,002 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 16:25:56,002 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 16:25:56,002 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 16:25:56,002 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 16:25:56,003 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 16:25:56,003 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 16:25:56,003 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 16:25:56,003 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 16:25:56,003 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 16:25:56,003 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 16:25:56,003 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 16:25:56,003 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 16:25:56,004 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 16:25:56,004 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 16:25:56,004 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 16:25:56,004 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 16:25:56,004 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 16:25:56,004 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 16:25:56,004 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 16:25:56,004 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 16:25:56,005 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 16:25:56,005 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 16:25:56,005 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 16:25:56,005 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 16:25:56,005 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 16:25:56,005 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 16:25:56,005 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 16:25:56,005 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_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2018-12-08 16:25:56,023 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 16:25:56,030 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 16:25:56,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 16:25:56,033 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 16:25:56,033 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 16:25:56,034 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-12-08 16:25:56,070 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/data/f95afe8d6/2e6e708c42944b36b58b3f4ad918ef8d/FLAG170c07ba0 [2018-12-08 16:25:56,492 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 16:25:56,492 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-12-08 16:25:56,496 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/data/f95afe8d6/2e6e708c42944b36b58b3f4ad918ef8d/FLAG170c07ba0 [2018-12-08 16:25:56,504 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/data/f95afe8d6/2e6e708c42944b36b58b3f4ad918ef8d [2018-12-08 16:25:56,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 16:25:56,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 16:25:56,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 16:25:56,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 16:25:56,509 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 16:25:56,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3163dfbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56, skipping insertion in model container [2018-12-08 16:25:56,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 16:25:56,524 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 16:25:56,607 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:25:56,609 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 16:25:56,618 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:25:56,626 INFO L195 MainTranslator]: Completed translation [2018-12-08 16:25:56,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56 WrapperNode [2018-12-08 16:25:56,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 16:25:56,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 16:25:56,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 16:25:56,627 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 16:25:56,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 16:25:56,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 16:25:56,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 16:25:56,638 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 16:25:56,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (1/1) ... [2018-12-08 16:25:56,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 16:25:56,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 16:25:56,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 16:25:56,648 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 16:25:56,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/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 [2018-12-08 16:25:56,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 16:25:56,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 16:25:56,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 16:25:56,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 16:25:56,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 16:25:56,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 16:25:56,707 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-08 16:25:56,707 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-08 16:25:56,707 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-08 16:25:56,707 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-08 16:25:56,797 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 16:25:56,797 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 16:25:56,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:25:56 BoogieIcfgContainer [2018-12-08 16:25:56,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 16:25:56,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 16:25:56,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 16:25:56,800 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 16:25:56,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 04:25:56" (1/3) ... [2018-12-08 16:25:56,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb89205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:25:56, skipping insertion in model container [2018-12-08 16:25:56,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:25:56" (2/3) ... [2018-12-08 16:25:56,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb89205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:25:56, skipping insertion in model container [2018-12-08 16:25:56,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:25:56" (3/3) ... [2018-12-08 16:25:56,802 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6_true-unreach-call_true-termination.c [2018-12-08 16:25:56,807 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 16:25:56,811 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 16:25:56,820 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 16:25:56,838 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 16:25:56,838 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 16:25:56,838 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 16:25:56,838 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 16:25:56,838 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 16:25:56,838 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 16:25:56,838 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 16:25:56,838 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 16:25:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-08 16:25:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 16:25:56,852 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:25:56,852 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:25:56,853 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:25:56,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-08 16:25:56,858 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:25:56,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:56,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:25:56,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:56,885 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:25:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:25:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:25:56,951 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:25:56,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 16:25:56,951 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:25:56,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 16:25:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 16:25:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 16:25:56,968 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-08 16:25:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:25:57,025 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-08 16:25:57,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 16:25:57,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-08 16:25:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:25:57,034 INFO L225 Difference]: With dead ends: 44 [2018-12-08 16:25:57,034 INFO L226 Difference]: Without dead ends: 30 [2018-12-08 16:25:57,035 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 [2018-12-08 16:25:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-08 16:25:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-08 16:25:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-08 16:25:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-08 16:25:57,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-08 16:25:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:25:57,061 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-08 16:25:57,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 16:25:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-08 16:25:57,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-08 16:25:57,062 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:25:57,062 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:25:57,062 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:25:57,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:57,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-08 16:25:57,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:25:57,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:57,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:25:57,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:57,063 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:25:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:25:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:25:57,091 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:25:57,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 16:25:57,091 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:25:57,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 16:25:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 16:25:57,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 16:25:57,093 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-08 16:25:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:25:57,126 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-08 16:25:57,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 16:25:57,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-08 16:25:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:25:57,127 INFO L225 Difference]: With dead ends: 36 [2018-12-08 16:25:57,127 INFO L226 Difference]: Without dead ends: 32 [2018-12-08 16:25:57,128 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 [2018-12-08 16:25:57,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-08 16:25:57,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-08 16:25:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-08 16:25:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-08 16:25:57,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-08 16:25:57,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:25:57,132 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-08 16:25:57,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 16:25:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-08 16:25:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-08 16:25:57,133 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:25:57,133 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:25:57,133 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:25:57,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-08 16:25:57,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:25:57,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:57,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:25:57,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:57,134 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:25:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:25:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 16:25:57,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:25:57,173 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:25:57,174 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-08 16:25:57,175 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [31], [32], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [56], [57], [58], [59] [2018-12-08 16:25:57,196 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:25:57,196 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:25:57,256 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-08 16:25:57,256 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 3. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 5 variables. [2018-12-08 16:25:57,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:57,263 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-08 16:25:57,289 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-12-08 16:25:57,289 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-08 16:25:57,301 INFO L418 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-12-08 16:25:57,301 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-08 16:25:57,302 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 16:25:57,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-12-08 16:25:57,302 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:25:57,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 16:25:57,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 16:25:57,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-08 16:25:57,302 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2018-12-08 16:25:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:25:57,416 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2018-12-08 16:25:57,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 16:25:57,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-12-08 16:25:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:25:57,418 INFO L225 Difference]: With dead ends: 72 [2018-12-08 16:25:57,418 INFO L226 Difference]: Without dead ends: 48 [2018-12-08 16:25:57,419 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 [2018-12-08 16:25:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-08 16:25:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-12-08 16:25:57,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-08 16:25:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2018-12-08 16:25:57,426 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2018-12-08 16:25:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:25:57,427 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2018-12-08 16:25:57,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 16:25:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2018-12-08 16:25:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-08 16:25:57,428 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:25:57,429 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:25:57,429 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:25:57,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:57,429 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-08 16:25:57,429 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:25:57,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:57,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:25:57,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:57,430 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:25:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:25:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-08 16:25:57,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:25:57,468 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:25:57,468 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-12-08 16:25:57,468 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [35], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-08 16:25:57,469 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:25:57,469 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:25:57,532 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-08 16:25:57,532 INFO L272 AbstractInterpreter]: Visited 28 different actions 200 times. Never merged. Widened at 2 different actions 11 times. Performed 411 root evaluator evaluations with a maximum evaluation depth of 4. Performed 411 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 18 fixpoints after 6 different actions. Largest state had 5 variables. [2018-12-08 16:25:57,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:57,535 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-08 16:25:57,545 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 50% of their original sizes. [2018-12-08 16:25:57,545 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-08 16:25:57,578 INFO L418 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-12-08 16:25:57,578 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-08 16:25:57,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 16:25:57,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-12-08 16:25:57,578 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:25:57,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 16:25:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 16:25:57,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-08 16:25:57,579 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2018-12-08 16:25:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:25:57,728 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2018-12-08 16:25:57,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 16:25:57,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-12-08 16:25:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:25:57,729 INFO L225 Difference]: With dead ends: 87 [2018-12-08 16:25:57,729 INFO L226 Difference]: Without dead ends: 55 [2018-12-08 16:25:57,729 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-12-08 16:25:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-08 16:25:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-08 16:25:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-08 16:25:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2018-12-08 16:25:57,734 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2018-12-08 16:25:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:25:57,735 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2018-12-08 16:25:57,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 16:25:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2018-12-08 16:25:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-08 16:25:57,736 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:25:57,736 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:25:57,736 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:25:57,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:57,736 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2018-12-08 16:25:57,736 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:25:57,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:57,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:25:57,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:57,737 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:25:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:25:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-08 16:25:57,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:25:57,784 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:25:57,784 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:25:57,785 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:25:57,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:25:57,785 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/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 [2018-12-08 16:25:57,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 16:25:57,794 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 16:25:57,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 16:25:57,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:25:57,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:25:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-08 16:25:57,872 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:25:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-08 16:25:58,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:25:58,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2018-12-08 16:25:58,097 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:25:58,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 16:25:58,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 16:25:58,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-12-08 16:25:58,098 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 11 states. [2018-12-08 16:25:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:25:58,234 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2018-12-08 16:25:58,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 16:25:58,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2018-12-08 16:25:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:25:58,236 INFO L225 Difference]: With dead ends: 121 [2018-12-08 16:25:58,236 INFO L226 Difference]: Without dead ends: 76 [2018-12-08 16:25:58,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-12-08 16:25:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-08 16:25:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2018-12-08 16:25:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-08 16:25:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-12-08 16:25:58,247 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 52 [2018-12-08 16:25:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:25:58,248 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-12-08 16:25:58,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 16:25:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-12-08 16:25:58,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-08 16:25:58,249 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:25:58,249 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:25:58,249 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:25:58,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:58,250 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2018-12-08 16:25:58,250 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:25:58,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:58,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:25:58,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:58,251 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:25:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:25:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-08 16:25:58,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:25:58,299 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:25:58,300 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-12-08 16:25:58,300 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-08 16:25:58,301 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:25:58,301 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:25:58,943 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-08 16:25:58,944 INFO L272 AbstractInterpreter]: Visited 29 different actions 3929 times. Merged at 11 different actions 1050 times. Widened at 2 different actions 189 times. Performed 9241 root evaluator evaluations with a maximum evaluation depth of 4. Performed 9241 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 481 fixpoints after 9 different actions. Largest state had 5 variables. [2018-12-08 16:25:58,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:58,947 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-08 16:25:58,957 INFO L227 lantSequenceWeakener]: Weakened 16 states. On average, predicates are now at 56.25% of their original sizes. [2018-12-08 16:25:58,957 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-08 16:25:59,019 INFO L418 sIntCurrentIteration]: We unified 54 AI predicates to 54 [2018-12-08 16:25:59,019 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-08 16:25:59,019 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 16:25:59,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 18 [2018-12-08 16:25:59,020 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:25:59,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 16:25:59,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 16:25:59,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-12-08 16:25:59,020 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 13 states. [2018-12-08 16:25:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:25:59,331 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2018-12-08 16:25:59,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 16:25:59,331 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-12-08 16:25:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:25:59,333 INFO L225 Difference]: With dead ends: 118 [2018-12-08 16:25:59,333 INFO L226 Difference]: Without dead ends: 77 [2018-12-08 16:25:59,333 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-12-08 16:25:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-08 16:25:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-12-08 16:25:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-08 16:25:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2018-12-08 16:25:59,341 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2018-12-08 16:25:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:25:59,342 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2018-12-08 16:25:59,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 16:25:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2018-12-08 16:25:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-08 16:25:59,344 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:25:59,344 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:25:59,344 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:25:59,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:59,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1937391112, now seen corresponding path program 1 times [2018-12-08 16:25:59,344 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:25:59,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:59,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:25:59,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:25:59,345 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:25:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:25:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-12-08 16:25:59,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:25:59,392 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:25:59,392 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 81 with the following transitions: [2018-12-08 16:25:59,392 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-08 16:25:59,393 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:25:59,393 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:25:59,709 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-08 16:25:59,709 INFO L272 AbstractInterpreter]: Visited 29 different actions 2572 times. Merged at 11 different actions 587 times. Widened at 2 different actions 135 times. Performed 5789 root evaluator evaluations with a maximum evaluation depth of 4. Performed 5789 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 318 fixpoints after 9 different actions. Largest state had 5 variables. [2018-12-08 16:25:59,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:25:59,710 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-08 16:25:59,720 INFO L227 lantSequenceWeakener]: Weakened 13 states. On average, predicates are now at 50% of their original sizes. [2018-12-08 16:25:59,721 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-08 16:25:59,776 INFO L418 sIntCurrentIteration]: We unified 79 AI predicates to 79 [2018-12-08 16:25:59,776 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-08 16:25:59,776 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 16:25:59,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-12-08 16:25:59,776 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:25:59,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 16:25:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 16:25:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-12-08 16:25:59,777 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 13 states. [2018-12-08 16:26:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:00,047 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2018-12-08 16:26:00,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 16:26:00,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2018-12-08 16:26:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:00,048 INFO L225 Difference]: With dead ends: 141 [2018-12-08 16:26:00,048 INFO L226 Difference]: Without dead ends: 86 [2018-12-08 16:26:00,049 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-12-08 16:26:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-08 16:26:00,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-12-08 16:26:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-12-08 16:26:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2018-12-08 16:26:00,054 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 80 [2018-12-08 16:26:00,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:00,054 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2018-12-08 16:26:00,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 16:26:00,054 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2018-12-08 16:26:00,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-12-08 16:26:00,055 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:26:00,055 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:26:00,056 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:26:00,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:00,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1541382103, now seen corresponding path program 1 times [2018-12-08 16:26:00,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:26:00,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:00,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:26:00,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:00,057 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:26:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 55 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-12-08 16:26:00,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:00,096 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:26:00,096 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 95 with the following transitions: [2018-12-08 16:26:00,096 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-08 16:26:00,097 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:26:00,097 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:26:00,535 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 16:26:00,535 INFO L272 AbstractInterpreter]: Visited 34 different actions 4845 times. Merged at 16 different actions 1436 times. Widened at 2 different actions 189 times. Performed 11828 root evaluator evaluations with a maximum evaluation depth of 4. Performed 11828 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 615 fixpoints after 11 different actions. Largest state had 5 variables. [2018-12-08 16:26:00,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:00,536 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 16:26:00,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:00,536 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/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 [2018-12-08 16:26:00,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:26:00,543 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:26:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:00,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:26:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-12-08 16:26:00,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:26:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-12-08 16:26:01,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:26:01,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 13] total 17 [2018-12-08 16:26:01,148 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:26:01,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 16:26:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 16:26:01,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-12-08 16:26:01,148 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 12 states. [2018-12-08 16:26:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:01,310 INFO L93 Difference]: Finished difference Result 212 states and 335 transitions. [2018-12-08 16:26:01,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 16:26:01,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 94 [2018-12-08 16:26:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:01,311 INFO L225 Difference]: With dead ends: 212 [2018-12-08 16:26:01,311 INFO L226 Difference]: Without dead ends: 134 [2018-12-08 16:26:01,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 167 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2018-12-08 16:26:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-12-08 16:26:01,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-12-08 16:26:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-08 16:26:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-12-08 16:26:01,322 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 94 [2018-12-08 16:26:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:01,322 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-12-08 16:26:01,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 16:26:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-12-08 16:26:01,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-12-08 16:26:01,323 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:26:01,323 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:26:01,323 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:26:01,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:01,323 INFO L82 PathProgramCache]: Analyzing trace with hash 721741772, now seen corresponding path program 2 times [2018-12-08 16:26:01,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:26:01,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:01,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:26:01,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:01,324 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:26:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 72 proven. 54 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-12-08 16:26:01,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:01,402 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:26:01,402 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:26:01,402 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:26:01,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:01,402 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/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 [2018-12-08 16:26:01,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 16:26:01,408 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 16:26:01,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 16:26:01,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:26:01,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:26:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 78 proven. 17 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2018-12-08 16:26:01,474 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:26:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 78 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-12-08 16:26:01,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:26:01,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 18 [2018-12-08 16:26:01,684 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:26:01,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 16:26:01,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 16:26:01,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-12-08 16:26:01,684 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 15 states. [2018-12-08 16:26:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:01,963 INFO L93 Difference]: Finished difference Result 231 states and 386 transitions. [2018-12-08 16:26:01,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-08 16:26:01,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 110 [2018-12-08 16:26:01,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:01,965 INFO L225 Difference]: With dead ends: 231 [2018-12-08 16:26:01,965 INFO L226 Difference]: Without dead ends: 165 [2018-12-08 16:26:01,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 207 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2018-12-08 16:26:01,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-12-08 16:26:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 144. [2018-12-08 16:26:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-08 16:26:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 210 transitions. [2018-12-08 16:26:01,976 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 210 transitions. Word has length 110 [2018-12-08 16:26:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:01,976 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 210 transitions. [2018-12-08 16:26:01,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 16:26:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 210 transitions. [2018-12-08 16:26:01,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-12-08 16:26:01,978 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:26:01,978 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:26:01,978 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:26:01,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash 332840963, now seen corresponding path program 3 times [2018-12-08 16:26:01,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:26:01,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:01,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:26:01,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:01,979 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:26:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 220 proven. 18 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-12-08 16:26:02,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:02,089 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:26:02,089 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:26:02,089 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:26:02,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:02,089 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/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 [2018-12-08 16:26:02,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 16:26:02,095 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 16:26:02,120 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 16:26:02,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:26:02,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:26:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 88 proven. 127 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2018-12-08 16:26:02,193 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:26:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 88 proven. 132 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2018-12-08 16:26:02,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:26:02,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 20 [2018-12-08 16:26:02,548 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:26:02,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-08 16:26:02,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-08 16:26:02,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-12-08 16:26:02,549 INFO L87 Difference]: Start difference. First operand 144 states and 210 transitions. Second operand 16 states. [2018-12-08 16:26:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:02,861 INFO L93 Difference]: Finished difference Result 363 states and 612 transitions. [2018-12-08 16:26:02,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-08 16:26:02,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 176 [2018-12-08 16:26:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:02,864 INFO L225 Difference]: With dead ends: 363 [2018-12-08 16:26:02,865 INFO L226 Difference]: Without dead ends: 250 [2018-12-08 16:26:02,866 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 335 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2018-12-08 16:26:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-12-08 16:26:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 213. [2018-12-08 16:26:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-12-08 16:26:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 330 transitions. [2018-12-08 16:26:02,884 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 330 transitions. Word has length 176 [2018-12-08 16:26:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:02,884 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 330 transitions. [2018-12-08 16:26:02,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-08 16:26:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 330 transitions. [2018-12-08 16:26:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-12-08 16:26:02,888 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:26:02,888 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 11, 11, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:26:02,888 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:26:02,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash 295496342, now seen corresponding path program 4 times [2018-12-08 16:26:02,889 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:26:02,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:02,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:26:02,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:02,889 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:26:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 159 proven. 112 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-12-08 16:26:02,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:02,989 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:26:02,989 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:26:02,989 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:26:02,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:02,989 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/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 [2018-12-08 16:26:02,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:26:02,995 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:26:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:03,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:26:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 168 proven. 190 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2018-12-08 16:26:03,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:26:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 166 proven. 200 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2018-12-08 16:26:03,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:26:03,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 14] total 23 [2018-12-08 16:26:03,771 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:26:03,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 16:26:03,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 16:26:03,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2018-12-08 16:26:03,772 INFO L87 Difference]: Start difference. First operand 213 states and 330 transitions. Second operand 17 states. [2018-12-08 16:26:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:04,007 INFO L93 Difference]: Finished difference Result 469 states and 840 transitions. [2018-12-08 16:26:04,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 16:26:04,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 215 [2018-12-08 16:26:04,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:04,008 INFO L225 Difference]: With dead ends: 469 [2018-12-08 16:26:04,009 INFO L226 Difference]: Without dead ends: 213 [2018-12-08 16:26:04,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 405 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2018-12-08 16:26:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-12-08 16:26:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2018-12-08 16:26:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-12-08 16:26:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 309 transitions. [2018-12-08 16:26:04,019 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 309 transitions. Word has length 215 [2018-12-08 16:26:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:04,020 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 309 transitions. [2018-12-08 16:26:04,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 16:26:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 309 transitions. [2018-12-08 16:26:04,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-12-08 16:26:04,021 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:26:04,021 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:26:04,022 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:26:04,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:04,022 INFO L82 PathProgramCache]: Analyzing trace with hash -667219450, now seen corresponding path program 5 times [2018-12-08 16:26:04,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:26:04,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:04,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:26:04,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:04,022 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:26:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 104 proven. 65 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2018-12-08 16:26:04,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:04,073 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:26:04,073 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:26:04,074 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:26:04,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:04,074 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/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 [2018-12-08 16:26:04,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 16:26:04,080 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 16:26:04,094 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 16:26:04,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:26:04,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:26:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 212 proven. 21 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2018-12-08 16:26:04,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:26:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 212 proven. 21 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2018-12-08 16:26:04,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:26:04,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 21 [2018-12-08 16:26:04,524 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:26:04,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 16:26:04,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 16:26:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2018-12-08 16:26:04,525 INFO L87 Difference]: Start difference. First operand 205 states and 309 transitions. Second operand 17 states. [2018-12-08 16:26:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:04,781 INFO L93 Difference]: Finished difference Result 396 states and 656 transitions. [2018-12-08 16:26:04,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-08 16:26:04,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 162 [2018-12-08 16:26:04,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:04,782 INFO L225 Difference]: With dead ends: 396 [2018-12-08 16:26:04,782 INFO L226 Difference]: Without dead ends: 200 [2018-12-08 16:26:04,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 304 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2018-12-08 16:26:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-12-08 16:26:04,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 187. [2018-12-08 16:26:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-12-08 16:26:04,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 259 transitions. [2018-12-08 16:26:04,791 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 259 transitions. Word has length 162 [2018-12-08 16:26:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:04,791 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 259 transitions. [2018-12-08 16:26:04,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 16:26:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 259 transitions. [2018-12-08 16:26:04,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-12-08 16:26:04,793 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:26:04,793 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 13, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:26:04,793 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:26:04,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:04,793 INFO L82 PathProgramCache]: Analyzing trace with hash -698015069, now seen corresponding path program 6 times [2018-12-08 16:26:04,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:26:04,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:04,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:26:04,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:04,794 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:26:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 245 proven. 97 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-12-08 16:26:04,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:04,904 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:26:04,904 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:26:04,904 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:26:04,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:04,905 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/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 [2018-12-08 16:26:04,911 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 16:26:04,911 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 16:26:04,932 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 16:26:04,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:26:04,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:26:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 245 proven. 95 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2018-12-08 16:26:04,966 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:26:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 243 proven. 105 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-12-08 16:26:05,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:26:05,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 14] total 20 [2018-12-08 16:26:05,538 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:26:05,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 16:26:05,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 16:26:05,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2018-12-08 16:26:05,539 INFO L87 Difference]: Start difference. First operand 187 states and 259 transitions. Second operand 14 states. [2018-12-08 16:26:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:05,644 INFO L93 Difference]: Finished difference Result 226 states and 310 transitions. [2018-12-08 16:26:05,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 16:26:05,644 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 205 [2018-12-08 16:26:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:05,646 INFO L225 Difference]: With dead ends: 226 [2018-12-08 16:26:05,646 INFO L226 Difference]: Without dead ends: 219 [2018-12-08 16:26:05,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 394 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2018-12-08 16:26:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-12-08 16:26:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 192. [2018-12-08 16:26:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-12-08 16:26:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 269 transitions. [2018-12-08 16:26:05,660 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 269 transitions. Word has length 205 [2018-12-08 16:26:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:05,660 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 269 transitions. [2018-12-08 16:26:05,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 16:26:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 269 transitions. [2018-12-08 16:26:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-12-08 16:26:05,662 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:26:05,662 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:26:05,662 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:26:05,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:05,663 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 7 times [2018-12-08 16:26:05,663 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:26:05,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:05,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:26:05,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:05,663 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:26:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-12-08 16:26:06,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:06,015 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:26:06,015 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:26:06,015 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:26:06,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:06,015 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:26:06,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:26:06,021 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:26:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:06,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:26:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-12-08 16:26:06,318 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:26:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-12-08 16:26:07,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:26:07,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2018-12-08 16:26:07,107 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:26:07,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-08 16:26:07,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-08 16:26:07,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 16:26:07,108 INFO L87 Difference]: Start difference. First operand 192 states and 269 transitions. Second operand 36 states. [2018-12-08 16:26:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:07,371 INFO L93 Difference]: Finished difference Result 292 states and 420 transitions. [2018-12-08 16:26:07,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-08 16:26:07,372 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2018-12-08 16:26:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:07,373 INFO L225 Difference]: With dead ends: 292 [2018-12-08 16:26:07,373 INFO L226 Difference]: Without dead ends: 285 [2018-12-08 16:26:07,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 344 SyntacticMatches, 28 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 16:26:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-12-08 16:26:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 208. [2018-12-08 16:26:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-12-08 16:26:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 292 transitions. [2018-12-08 16:26:07,385 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 292 transitions. Word has length 177 [2018-12-08 16:26:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:07,385 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 292 transitions. [2018-12-08 16:26:07,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-08 16:26:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 292 transitions. [2018-12-08 16:26:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-12-08 16:26:07,386 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:26:07,386 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:26:07,386 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:26:07,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 8 times [2018-12-08 16:26:07,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:26:07,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:07,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:26:07,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:07,387 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:26:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 267 proven. 35 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-12-08 16:26:07,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:07,479 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:26:07,479 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:26:07,479 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:26:07,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:07,479 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:26:07,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 16:26:07,486 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 16:26:07,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-08 16:26:07,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:26:07,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:26:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 306 proven. 36 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2018-12-08 16:26:07,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:26:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 306 proven. 38 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2018-12-08 16:26:08,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:26:08,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 20 [2018-12-08 16:26:08,001 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:26:08,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 16:26:08,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 16:26:08,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2018-12-08 16:26:08,001 INFO L87 Difference]: Start difference. First operand 208 states and 292 transitions. Second operand 15 states. [2018-12-08 16:26:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:08,207 INFO L93 Difference]: Finished difference Result 374 states and 537 transitions. [2018-12-08 16:26:08,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-08 16:26:08,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 191 [2018-12-08 16:26:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:08,208 INFO L225 Difference]: With dead ends: 374 [2018-12-08 16:26:08,208 INFO L226 Difference]: Without dead ends: 200 [2018-12-08 16:26:08,209 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 365 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2018-12-08 16:26:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-12-08 16:26:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 187. [2018-12-08 16:26:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-12-08 16:26:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 256 transitions. [2018-12-08 16:26:08,217 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 256 transitions. Word has length 191 [2018-12-08 16:26:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:08,217 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 256 transitions. [2018-12-08 16:26:08,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 16:26:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 256 transitions. [2018-12-08 16:26:08,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-08 16:26:08,218 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:26:08,218 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:26:08,218 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:26:08,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1006786053, now seen corresponding path program 9 times [2018-12-08 16:26:08,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:26:08,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:08,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:26:08,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:08,219 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:26:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 90 proven. 118 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2018-12-08 16:26:08,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:08,261 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:26:08,261 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:26:08,262 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:26:08,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:08,262 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:26:08,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 16:26:08,267 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 16:26:08,287 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 16:26:08,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:26:08,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:26:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 88 proven. 182 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2018-12-08 16:26:08,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:26:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 92 proven. 186 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2018-12-08 16:26:08,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:26:08,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 13] total 18 [2018-12-08 16:26:08,779 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:26:08,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 16:26:08,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 16:26:08,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-12-08 16:26:08,779 INFO L87 Difference]: Start difference. First operand 187 states and 256 transitions. Second operand 13 states. [2018-12-08 16:26:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:08,960 INFO L93 Difference]: Finished difference Result 426 states and 631 transitions. [2018-12-08 16:26:08,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 16:26:08,961 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 178 [2018-12-08 16:26:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:08,962 INFO L225 Difference]: With dead ends: 426 [2018-12-08 16:26:08,962 INFO L226 Difference]: Without dead ends: 158 [2018-12-08 16:26:08,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 335 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2018-12-08 16:26:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-08 16:26:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2018-12-08 16:26:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-12-08 16:26:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 193 transitions. [2018-12-08 16:26:08,969 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 193 transitions. Word has length 178 [2018-12-08 16:26:08,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:08,970 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 193 transitions. [2018-12-08 16:26:08,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 16:26:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 193 transitions. [2018-12-08 16:26:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-12-08 16:26:08,971 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:26:08,971 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:26:08,971 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:26:08,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:26:08,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1318513955, now seen corresponding path program 10 times [2018-12-08 16:26:08,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:26:08,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:08,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:26:08,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:26:08,972 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:26:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 99 proven. 291 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2018-12-08 16:26:09,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:09,066 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:26:09,066 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:26:09,067 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:26:09,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:26:09,067 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:26:09,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:26:09,073 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:26:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:26:09,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:26:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 103 proven. 285 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-12-08 16:26:09,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:26:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 101 proven. 301 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2018-12-08 16:26:09,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:26:09,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 16] total 22 [2018-12-08 16:26:09,921 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:26:09,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 16:26:09,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 16:26:09,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-12-08 16:26:09,922 INFO L87 Difference]: Start difference. First operand 157 states and 193 transitions. Second operand 15 states. [2018-12-08 16:26:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:26:10,068 INFO L93 Difference]: Finished difference Result 204 states and 252 transitions. [2018-12-08 16:26:10,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 16:26:10,069 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 204 [2018-12-08 16:26:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:26:10,069 INFO L225 Difference]: With dead ends: 204 [2018-12-08 16:26:10,069 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 16:26:10,070 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 390 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2018-12-08 16:26:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 16:26:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 16:26:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 16:26:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 16:26:10,071 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2018-12-08 16:26:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:26:10,071 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 16:26:10,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 16:26:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 16:26:10,071 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 16:26:10,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 16:26:10,178 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,186 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,188 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,188 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,189 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,189 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,197 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,198 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,199 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,199 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,200 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,263 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,265 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,268 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,270 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,277 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,279 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,280 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,280 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,281 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,287 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,289 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,289 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,290 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,290 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,301 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,309 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,315 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,319 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,324 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,325 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,326 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,332 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,333 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,334 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,340 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,341 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,342 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,354 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,362 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,363 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,364 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,381 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,383 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,386 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,388 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,391 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,400 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,465 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,466 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,479 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,480 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,481 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,490 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,503 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,518 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,519 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,525 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,526 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,533 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,534 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,540 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,544 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,553 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,576 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,587 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,597 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,598 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,599 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,606 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,607 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,609 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,617 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,617 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,618 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,628 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,629 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,629 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,640 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,642 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,659 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,660 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,660 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,677 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,678 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,688 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,689 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,759 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,760 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,761 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,791 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,792 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,792 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,794 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:10,810 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 16:26:11,185 WARN L180 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 33 [2018-12-08 16:26:11,404 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 31 [2018-12-08 16:26:11,405 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 16:26:11,405 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 16:26:11,406 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-12-08 16:26:11,406 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (< 2 |fibo2_#in~n|) (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n)) [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (let ((.cse0 (<= fibo2_~n |fibo2_#in~n|)) (.cse1 (<= |fibo2_#in~n| fibo2_~n))) (or (and .cse0 (<= 5 |fibo2_#in~n|) .cse1) (and .cse0 (<= |fibo2_#in~n| 3) .cse1) (and (<= fibo2_~n 4) .cse1 (<= 4 |fibo2_#in~n|) (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|)))) (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1) (<= 3 |fibo2_#in~n|)) (<= 4 fibo2_~n)) (or (not (= |fibo2_#in~n| 5)) (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)))) [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-12-08 16:26:11,406 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-12-08 16:26:11,407 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-12-08 16:26:11,407 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-12-08 16:26:11,407 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-12-08 16:26:11,407 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-12-08 16:26:11,407 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (< 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-12-08 16:26:11,407 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-08 16:26:11,407 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (<= |fibo1_#in~n| fibo1_~n))) (let ((.cse1 (and (<= fibo1_~n 3) (<= 1 |fibo1_#t~ret0|) (<= 3 |fibo1_#in~n|) (<= |fibo1_#t~ret0| 1) .cse0))) (and (or (not (= |fibo1_#in~n| 6)) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|))) (or (and (<= fibo1_~n |fibo1_#in~n|) (<= 4 |fibo1_#in~n|) .cse0) .cse1) (or (<= 5 |fibo1_#in~n|) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2)) .cse1)))) [2018-12-08 16:26:11,407 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-12-08 16:26:11,407 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-12-08 16:26:11,407 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-12-08 16:26:11,407 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-12-08 16:26:11,407 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-12-08 16:26:11,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 04:26:11 BoogieIcfgContainer [2018-12-08 16:26:11,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 16:26:11,409 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 16:26:11,409 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 16:26:11,409 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 16:26:11,409 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:25:56" (3/4) ... [2018-12-08 16:26:11,411 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 16:26:11,414 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 16:26:11,415 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 16:26:11,415 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-12-08 16:26:11,415 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-12-08 16:26:11,417 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 16:26:11,417 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-08 16:26:11,417 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 16:26:11,441 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d02380fe-a46a-4468-b7c1-9da553caca21/bin-2019/utaipan/witness.graphml [2018-12-08 16:26:11,442 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 16:26:11,442 INFO L168 Benchmark]: Toolchain (without parser) took 14935.93 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 647.0 MB). Free memory was 957.1 MB in the beginning and 965.7 MB in the end (delta: -8.7 MB). Peak memory consumption was 638.3 MB. Max. memory is 11.5 GB. [2018-12-08 16:26:11,443 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:26:11,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 119.11 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 16:26:11,443 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.32 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:26:11,443 INFO L168 Benchmark]: Boogie Preprocessor took 10.01 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:26:11,443 INFO L168 Benchmark]: RCFGBuilder took 149.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -150.2 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2018-12-08 16:26:11,443 INFO L168 Benchmark]: TraceAbstraction took 14610.33 ms. Allocated memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: 530.1 MB). Free memory was 1.1 GB in the beginning and 965.7 MB in the end (delta: 130.8 MB). Peak memory consumption was 660.9 MB. Max. memory is 11.5 GB. [2018-12-08 16:26:11,444 INFO L168 Benchmark]: Witness Printer took 32.88 ms. Allocated memory is still 1.7 GB. Free memory is still 965.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:26:11,445 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 119.11 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.32 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.01 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 149.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -150.2 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14610.33 ms. Allocated memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: 530.1 MB). Free memory was 1.1 GB in the beginning and 965.7 MB in the end (delta: 130.8 MB). Peak memory consumption was 660.9 MB. Max. memory is 11.5 GB. * Witness Printer took 32.88 ms. Allocated memory is still 1.7 GB. Free memory is still 965.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 14.5s OverallTime, 17 OverallIterations, 16 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 1.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 626 SDtfs, 681 SDslu, 5361 SDs, 0 SdLazy, 4010 SolverSat, 542 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 3995 GetRequests, 3507 SyntacticMatches, 132 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=213occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.5s AbstIntTime, 5 AbstIntIterations, 4 AbstIntStrong, 0.8596938775510204 AbsIntWeakeningRatio, 0.5714285714285714 AbsIntAvgWeakeningVarsNumRemoved, 0.20408163265306123 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 263 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 929 PreInvPairs, 1973 NumberOfFragments, 167 HoareAnnotationTreeSize, 929 FomulaSimplifications, 126722 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 11 FomulaSimplificationsInter, 6141 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 3755 NumberOfCodeBlocks, 3403 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 5480 ConstructedInterpolants, 0 QuantifiedInterpolants, 1668373 SizeOfPredicates, 58 NumberOfNonLiveVariables, 3084 ConjunctsInSsa, 216 ConjunctsInUnsatCore, 39 InterpolantComputations, 2 PerfectInterpolantSequences, 19870/23635 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...