./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9918b49e0d76e4ce36b6a6760021b33460a8ae9b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 12:02:18,702 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:02:18,703 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:02:18,711 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:02:18,712 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:02:18,712 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:02:18,713 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:02:18,714 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:02:18,716 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:02:18,716 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:02:18,717 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:02:18,717 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:02:18,718 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:02:18,718 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:02:18,719 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:02:18,720 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:02:18,720 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:02:18,721 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:02:18,723 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:02:18,724 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:02:18,725 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:02:18,725 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:02:18,727 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:02:18,727 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:02:18,727 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:02:18,728 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:02:18,729 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:02:18,729 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:02:18,730 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:02:18,731 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:02:18,731 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:02:18,731 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:02:18,731 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:02:18,732 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:02:18,732 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:02:18,733 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:02:18,733 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-11-18 12:02:18,743 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:02:18,743 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:02:18,744 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:02:18,744 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 12:02:18,744 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 12:02:18,744 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 12:02:18,744 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 12:02:18,745 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 12:02:18,745 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 12:02:18,745 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 12:02:18,745 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 12:02:18,745 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 12:02:18,745 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 12:02:18,746 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:02:18,746 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:02:18,746 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 12:02:18,746 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:02:18,746 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:02:18,746 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:02:18,747 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:02:18,747 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:02:18,747 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:02:18,747 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 12:02:18,747 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:02:18,747 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:02:18,747 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:02:18,748 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:02:18,748 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:02:18,748 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:02:18,748 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:02:18,748 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:02:18,748 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:02:18,749 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:02:18,749 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:02:18,749 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:02:18,749 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 12:02:18,749 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:02:18,749 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:02:18,749 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 12:02:18,749 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_99ffbeb2-07be-4505-9f31-bc5c8b021964/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 ! overflow) ) 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 -> 9918b49e0d76e4ce36b6a6760021b33460a8ae9b [2018-11-18 12:02:18,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:02:18,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:02:18,784 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:02:18,785 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:02:18,786 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:02:18,786 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-18 12:02:18,827 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/data/c6e03bb08/a4fa00d56e9c49898744a2125465c452/FLAGedab5bef9 [2018-11-18 12:02:19,228 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:02:19,229 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-18 12:02:19,232 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/data/c6e03bb08/a4fa00d56e9c49898744a2125465c452/FLAGedab5bef9 [2018-11-18 12:02:19,242 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/data/c6e03bb08/a4fa00d56e9c49898744a2125465c452 [2018-11-18 12:02:19,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:02:19,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 12:02:19,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:02:19,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:02:19,248 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:02:19,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20946227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19, skipping insertion in model container [2018-11-18 12:02:19,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:02:19,268 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:02:19,372 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:02:19,374 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:02:19,385 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:02:19,394 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:02:19,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19 WrapperNode [2018-11-18 12:02:19,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:02:19,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 12:02:19,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 12:02:19,395 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 12:02:19,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,403 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 12:02:19,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:02:19,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:02:19,408 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:02:19,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (1/1) ... [2018-11-18 12:02:19,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:02:19,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:02:19,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:02:19,422 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:02:19,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:02:19,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:02:19,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:02:19,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:02:19,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:02:19,502 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:02:19,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:02:19,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 12:02:19,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 12:02:19,503 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2018-11-18 12:02:19,503 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2018-11-18 12:02:19,673 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:02:19,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:02:19 BoogieIcfgContainer [2018-11-18 12:02:19,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:02:19,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:02:19,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:02:19,677 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:02:19,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:02:19" (1/3) ... [2018-11-18 12:02:19,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212a7110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:02:19, skipping insertion in model container [2018-11-18 12:02:19,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:02:19" (2/3) ... [2018-11-18 12:02:19,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212a7110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:02:19, skipping insertion in model container [2018-11-18 12:02:19,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:02:19" (3/3) ... [2018-11-18 12:02:19,681 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-18 12:02:19,688 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:02:19,693 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-11-18 12:02:19,705 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-11-18 12:02:19,732 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:02:19,732 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:02:19,732 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:02:19,732 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:02:19,732 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:02:19,732 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:02:19,733 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:02:19,733 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:02:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2018-11-18 12:02:19,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 12:02:19,753 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:19,753 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:19,755 INFO L423 AbstractCegarLoop]: === Iteration 1 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:19,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:19,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1733380565, now seen corresponding path program 1 times [2018-11-18 12:02:19,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:19,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:19,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:19,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:19,803 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:19,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:02:19,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 12:02:19,886 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:02:19,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:02:19,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:02:19,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:02:19,898 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 5 states. [2018-11-18 12:02:20,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:20,000 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2018-11-18 12:02:20,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:02:20,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-11-18 12:02:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:20,008 INFO L225 Difference]: With dead ends: 94 [2018-11-18 12:02:20,009 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 12:02:20,012 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:02:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 12:02:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2018-11-18 12:02:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 12:02:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-11-18 12:02:20,038 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 9 [2018-11-18 12:02:20,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:20,039 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-11-18 12:02:20,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:02:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-11-18 12:02:20,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 12:02:20,039 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:20,039 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:20,039 INFO L423 AbstractCegarLoop]: === Iteration 2 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:20,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:20,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2099771252, now seen corresponding path program 1 times [2018-11-18 12:02:20,040 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:20,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:20,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:20,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:20,041 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:20,079 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:02:20,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 12:02:20,079 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:02:20,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:02:20,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:02:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:02:20,081 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2018-11-18 12:02:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:20,155 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2018-11-18 12:02:20,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:02:20,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-18 12:02:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:20,156 INFO L225 Difference]: With dead ends: 48 [2018-11-18 12:02:20,156 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 12:02:20,157 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:02:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 12:02:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2018-11-18 12:02:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 12:02:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 12:02:20,161 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 10 [2018-11-18 12:02:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:20,161 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 12:02:20,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:02:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 12:02:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 12:02:20,162 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:20,162 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:20,163 INFO L423 AbstractCegarLoop]: === Iteration 3 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:20,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:20,163 INFO L82 PathProgramCache]: Analyzing trace with hash -634751433, now seen corresponding path program 1 times [2018-11-18 12:02:20,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:20,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:20,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:20,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:20,164 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:20,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:02:20,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 12:02:20,197 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:02:20,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:02:20,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:02:20,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:02:20,198 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2018-11-18 12:02:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:20,278 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2018-11-18 12:02:20,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:02:20,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-11-18 12:02:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:20,279 INFO L225 Difference]: With dead ends: 37 [2018-11-18 12:02:20,279 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 12:02:20,280 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:02:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 12:02:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-11-18 12:02:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 12:02:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-11-18 12:02:20,283 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2018-11-18 12:02:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:20,283 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-11-18 12:02:20,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:02:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-11-18 12:02:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 12:02:20,284 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:20,284 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:20,284 INFO L423 AbstractCegarLoop]: === Iteration 4 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:20,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:20,284 INFO L82 PathProgramCache]: Analyzing trace with hash -634751625, now seen corresponding path program 1 times [2018-11-18 12:02:20,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:20,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:20,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:20,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:20,285 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:20,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:02:20,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 12:02:20,314 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:02:20,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:02:20,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:02:20,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:02:20,314 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2018-11-18 12:02:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:20,358 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-11-18 12:02:20,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:02:20,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-11-18 12:02:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:20,359 INFO L225 Difference]: With dead ends: 36 [2018-11-18 12:02:20,359 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 12:02:20,360 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:02:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 12:02:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2018-11-18 12:02:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 12:02:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-11-18 12:02:20,363 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2018-11-18 12:02:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:20,363 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-11-18 12:02:20,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:02:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-11-18 12:02:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 12:02:20,364 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:20,364 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:20,364 INFO L423 AbstractCegarLoop]: === Iteration 5 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:20,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:20,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1352493196, now seen corresponding path program 1 times [2018-11-18 12:02:20,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:20,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:20,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:20,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:20,365 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:20,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:20,418 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:02:20,418 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-18 12:02:20,420 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [50], [56], [65], [66], [67], [69], [76], [77], [78], [80] [2018-11-18 12:02:20,444 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:02:20,444 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:02:20,524 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 12:02:20,525 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 3. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 4 variables. [2018-11-18 12:02:20,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:20,529 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 12:02:20,566 INFO L227 lantSequenceWeakener]: Weakened 9 states. On average, predicates are now at 50% of their original sizes. [2018-11-18 12:02:20,566 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 12:02:20,584 INFO L415 sIntCurrentIteration]: We unified 18 AI predicates to 18 [2018-11-18 12:02:20,584 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 12:02:20,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 12:02:20,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2018-11-18 12:02:20,585 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:02:20,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:02:20,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:02:20,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:02:20,585 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2018-11-18 12:02:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:20,663 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-11-18 12:02:20,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:02:20,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-18 12:02:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:20,664 INFO L225 Difference]: With dead ends: 34 [2018-11-18 12:02:20,664 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 12:02:20,665 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:02:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 12:02:20,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-11-18 12:02:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 12:02:20,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-11-18 12:02:20,668 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2018-11-18 12:02:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:20,669 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-11-18 12:02:20,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:02:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-11-18 12:02:20,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 12:02:20,669 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:20,669 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:20,670 INFO L423 AbstractCegarLoop]: === Iteration 6 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:20,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1735103278, now seen corresponding path program 1 times [2018-11-18 12:02:20,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:20,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:20,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:20,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:20,671 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:20,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:20,712 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:02:20,712 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-18 12:02:20,712 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [50], [56], [59], [61], [63], [65], [66], [76], [77], [78], [80] [2018-11-18 12:02:20,714 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:02:20,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:02:20,759 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:02:20,759 INFO L272 AbstractInterpreter]: Visited 17 different actions 36 times. Merged at 7 different actions 17 times. Never widened. Performed 93 root evaluator evaluations with a maximum evaluation depth of 3. Performed 93 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 12:02:20,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:20,768 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:02:20,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:20,769 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:02:20,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:20,782 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:02:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:20,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:20,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:20,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:02:20,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2018-11-18 12:02:20,961 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:02:20,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 12:02:20,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 12:02:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-11-18 12:02:20,962 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2018-11-18 12:02:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:21,090 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2018-11-18 12:02:21,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 12:02:21,090 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-11-18 12:02:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:21,091 INFO L225 Difference]: With dead ends: 58 [2018-11-18 12:02:21,091 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 12:02:21,092 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2018-11-18 12:02:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 12:02:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2018-11-18 12:02:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 12:02:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2018-11-18 12:02:21,098 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2018-11-18 12:02:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:21,098 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2018-11-18 12:02:21,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 12:02:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2018-11-18 12:02:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 12:02:21,099 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:21,099 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:21,099 INFO L423 AbstractCegarLoop]: === Iteration 7 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:21,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:21,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1735103086, now seen corresponding path program 1 times [2018-11-18 12:02:21,099 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:21,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:21,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:21,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:21,100 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:21,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:21,124 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:02:21,124 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-18 12:02:21,124 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [50], [56], [59], [60], [61], [63], [76], [77], [78], [80] [2018-11-18 12:02:21,125 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:02:21,125 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:02:21,150 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:02:21,150 INFO L272 AbstractInterpreter]: Visited 16 different actions 34 times. Merged at 6 different actions 16 times. Never widened. Performed 87 root evaluator evaluations with a maximum evaluation depth of 3. Performed 87 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 12:02:21,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:21,171 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:02:21,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:21,172 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:02:21,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:21,177 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:02:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:21,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:21,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:21,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:02:21,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 10 [2018-11-18 12:02:21,273 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:02:21,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:02:21,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:02:21,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-18 12:02:21,274 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 6 states. [2018-11-18 12:02:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:21,316 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-11-18 12:02:21,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:02:21,317 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 12:02:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:21,317 INFO L225 Difference]: With dead ends: 45 [2018-11-18 12:02:21,317 INFO L226 Difference]: Without dead ends: 44 [2018-11-18 12:02:21,317 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:02:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-18 12:02:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2018-11-18 12:02:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 12:02:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-11-18 12:02:21,323 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 19 [2018-11-18 12:02:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:21,323 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-11-18 12:02:21,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:02:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-11-18 12:02:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 12:02:21,324 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:21,324 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:21,325 INFO L423 AbstractCegarLoop]: === Iteration 8 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:21,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:21,325 INFO L82 PathProgramCache]: Analyzing trace with hash 203854100, now seen corresponding path program 1 times [2018-11-18 12:02:21,325 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:21,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:21,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:21,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:21,326 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 12:02:21,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:21,385 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:02:21,387 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 30 with the following transitions: [2018-11-18 12:02:21,388 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [50], [56], [59], [61], [63], [65], [66], [67], [69], [76], [77], [78], [80] [2018-11-18 12:02:21,389 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:02:21,389 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:02:21,433 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:02:21,433 INFO L272 AbstractInterpreter]: Visited 19 different actions 58 times. Merged at 9 different actions 34 times. Widened at 1 different actions 1 times. Performed 171 root evaluator evaluations with a maximum evaluation depth of 4. Performed 171 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 5 fixpoints after 2 different actions. Largest state had 4 variables. [2018-11-18 12:02:21,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:21,440 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:02:21,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:21,441 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:02:21,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:21,447 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:02:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:21,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:02:21,548 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:02:21,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:02:21,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2018-11-18 12:02:21,614 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:02:21,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:02:21,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:02:21,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:02:21,615 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 13 states. [2018-11-18 12:02:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:21,818 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2018-11-18 12:02:21,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 12:02:21,818 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2018-11-18 12:02:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:21,819 INFO L225 Difference]: With dead ends: 97 [2018-11-18 12:02:21,819 INFO L226 Difference]: Without dead ends: 78 [2018-11-18 12:02:21,819 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2018-11-18 12:02:21,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-18 12:02:21,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 52. [2018-11-18 12:02:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-18 12:02:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2018-11-18 12:02:21,825 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 29 [2018-11-18 12:02:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:21,825 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2018-11-18 12:02:21,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:02:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2018-11-18 12:02:21,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-18 12:02:21,825 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:21,826 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:21,826 INFO L423 AbstractCegarLoop]: === Iteration 9 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:21,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:21,826 INFO L82 PathProgramCache]: Analyzing trace with hash -859371907, now seen corresponding path program 1 times [2018-11-18 12:02:21,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:21,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:21,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:21,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:21,827 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:21,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:21,885 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:02:21,885 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2018-11-18 12:02:21,885 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [50], [56], [59], [60], [61], [63], [65], [67], [69], [76], [77], [78], [80] [2018-11-18 12:02:21,886 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:02:21,887 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:02:21,918 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:02:21,918 INFO L272 AbstractInterpreter]: Visited 19 different actions 60 times. Merged at 9 different actions 34 times. Widened at 1 different actions 1 times. Performed 174 root evaluator evaluations with a maximum evaluation depth of 4. Performed 174 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 5 fixpoints after 2 different actions. Largest state had 4 variables. [2018-11-18 12:02:21,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:21,920 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:02:21,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:21,920 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:02:21,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:21,926 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:02:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:21,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:22,045 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:02:22,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:02:22,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-11-18 12:02:22,208 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:02:22,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 12:02:22,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 12:02:22,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2018-11-18 12:02:22,209 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 16 states. [2018-11-18 12:02:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:22,342 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2018-11-18 12:02:22,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 12:02:22,343 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2018-11-18 12:02:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:22,343 INFO L225 Difference]: With dead ends: 88 [2018-11-18 12:02:22,343 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 12:02:22,344 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2018-11-18 12:02:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 12:02:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2018-11-18 12:02:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 12:02:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-11-18 12:02:22,350 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 34 [2018-11-18 12:02:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:22,350 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-11-18 12:02:22,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 12:02:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-11-18 12:02:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-18 12:02:22,351 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:22,351 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:22,352 INFO L423 AbstractCegarLoop]: === Iteration 10 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:22,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2000009774, now seen corresponding path program 2 times [2018-11-18 12:02:22,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:22,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:22,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:02:22,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:22,353 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 12:02:22,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:22,401 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:02:22,401 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:02:22,401 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:02:22,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:22,401 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:02:22,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:02:22,406 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:02:22,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-18 12:02:22,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:02:22,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-18 12:02:22,458 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-18 12:02:22,560 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:02:22,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 19 [2018-11-18 12:02:22,560 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:02:22,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:02:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:02:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:02:22,561 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 9 states. [2018-11-18 12:02:22,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:22,675 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2018-11-18 12:02:22,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 12:02:22,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-11-18 12:02:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:22,675 INFO L225 Difference]: With dead ends: 77 [2018-11-18 12:02:22,676 INFO L226 Difference]: Without dead ends: 76 [2018-11-18 12:02:22,676 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2018-11-18 12:02:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-18 12:02:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2018-11-18 12:02:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-18 12:02:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-11-18 12:02:22,686 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2018-11-18 12:02:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:22,687 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-11-18 12:02:22,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:02:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-11-18 12:02:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-18 12:02:22,687 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:02:22,687 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:02:22,688 INFO L423 AbstractCegarLoop]: === Iteration 11 === [gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 12:02:22,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:02:22,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2000009582, now seen corresponding path program 2 times [2018-11-18 12:02:22,688 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:02:22,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:22,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:02:22,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:02:22,688 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:02:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:02:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 12:02:22,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:22,718 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:02:22,718 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:02:22,718 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:02:22,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:02:22,718 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:02:22,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:02:22,724 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:02:22,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 12:02:22,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:02:22,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:02:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 12:02:22,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:02:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 12:02:22,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:02:22,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 7] total 14 [2018-11-18 12:02:22,830 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:02:22,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 12:02:22,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 12:02:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-11-18 12:02:22,830 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 12 states. [2018-11-18 12:02:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:02:22,951 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2018-11-18 12:02:22,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 12:02:22,952 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2018-11-18 12:02:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:02:22,952 INFO L225 Difference]: With dead ends: 46 [2018-11-18 12:02:22,952 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 12:02:22,953 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-11-18 12:02:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 12:02:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 12:02:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 12:02:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 12:02:22,953 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-11-18 12:02:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:02:22,953 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 12:02:22,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 12:02:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 12:02:22,953 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 12:02:22,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 12:02:22,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:02:23,132 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2018-11-18 12:02:23,133 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 12:02:23,134 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 30 46) the Hoare annotation is: true [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 30 46) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L421 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (<= 63 main_~x~0) [2018-11-18 12:02:23,134 INFO L421 ceAbstractionStarter]: At program point L41(line 41) the Hoare annotation is: (<= 63 main_~x~0) [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 30 46) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L421 ceAbstractionStarter]: At program point L41-1(line 41) the Hoare annotation is: (<= 63 main_~x~0) [2018-11-18 12:02:23,134 INFO L421 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: (and (= main_~y~0 18) (= main_~x~0 63)) [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-11-18 12:02:23,134 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-18 12:02:23,135 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 25) no Hoare annotation was computed. [2018-11-18 12:02:23,135 INFO L425 ceAbstractionStarter]: For program point gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-11-18 12:02:23,135 INFO L425 ceAbstractionStarter]: For program point L19-3(lines 19 25) no Hoare annotation was computed. [2018-11-18 12:02:23,135 INFO L425 ceAbstractionStarter]: For program point gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-11-18 12:02:23,135 INFO L425 ceAbstractionStarter]: For program point gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2018-11-18 12:02:23,135 INFO L425 ceAbstractionStarter]: For program point gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 12) no Hoare annotation was computed. [2018-11-18 12:02:23,135 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-18 12:02:23,135 INFO L421 ceAbstractionStarter]: At program point L20-2(lines 19 25) the Hoare annotation is: (let ((.cse0 (<= 18 gcd_test_~b)) (.cse2 (<= gcd_test_~b 18))) (or (not (= |gcd_test_#in~a| 63)) (let ((.cse1 (+ (* 2 gcd_test_~b) gcd_test_~a))) (and .cse0 (<= .cse1 63) (<= 63 .cse1) .cse2)) (let ((.cse3 (+ gcd_test_~b gcd_test_~a))) (and (<= .cse3 63) .cse0 (<= 63 .cse3) .cse2)) (and (= gcd_test_~a 63) (= gcd_test_~b 18)) (and (<= 0 gcd_test_~b) (<= gcd_test_~a 18) (and (<= 1 gcd_test_~a) .cse2)) (not (= |gcd_test_#in~b| 18)))) [2018-11-18 12:02:23,135 INFO L425 ceAbstractionStarter]: For program point gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-11-18 12:02:23,135 INFO L425 ceAbstractionStarter]: For program point L12(line 12) no Hoare annotation was computed. [2018-11-18 12:02:23,139 INFO L425 ceAbstractionStarter]: For program point L12-1(line 12) no Hoare annotation was computed. [2018-11-18 12:02:23,139 INFO L425 ceAbstractionStarter]: For program point L12-2(line 12) no Hoare annotation was computed. [2018-11-18 12:02:23,139 INFO L425 ceAbstractionStarter]: For program point L12-4(lines 11 27) no Hoare annotation was computed. [2018-11-18 12:02:23,140 INFO L425 ceAbstractionStarter]: For program point gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-11-18 12:02:23,140 INFO L425 ceAbstractionStarter]: For program point gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 12) no Hoare annotation was computed. [2018-11-18 12:02:23,140 INFO L425 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-11-18 12:02:23,140 INFO L425 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-11-18 12:02:23,140 INFO L425 ceAbstractionStarter]: For program point gcd_testEXIT(lines 10 27) no Hoare annotation was computed. [2018-11-18 12:02:23,140 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-18 12:02:23,140 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-18 12:02:23,140 INFO L425 ceAbstractionStarter]: For program point L13-3(lines 11 27) no Hoare annotation was computed. [2018-11-18 12:02:23,140 INFO L428 ceAbstractionStarter]: At program point gcd_testENTRY(lines 10 27) the Hoare annotation is: true [2018-11-18 12:02:23,140 INFO L425 ceAbstractionStarter]: For program point gcd_testFINAL(lines 10 27) no Hoare annotation was computed. [2018-11-18 12:02:23,140 INFO L425 ceAbstractionStarter]: For program point gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2018-11-18 12:02:23,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:02:23 BoogieIcfgContainer [2018-11-18 12:02:23,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:02:23,150 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:02:23,150 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:02:23,150 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:02:23,152 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:02:19" (3/4) ... [2018-11-18 12:02:23,154 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 12:02:23,158 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 12:02:23,158 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 12:02:23,158 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 12:02:23,159 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd_test [2018-11-18 12:02:23,161 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-18 12:02:23,162 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 12:02:23,162 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 12:02:23,178 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(\old(a) == 63) || (((18 <= b && 2 * b + a <= 63) && 63 <= 2 * b + a) && b <= 18)) || (((b + a <= 63 && 18 <= b) && 63 <= b + a) && b <= 18)) || (a == 63 && b == 18)) || ((0 <= b && a <= 18) && 1 <= a && b <= 18)) || !(\old(b) == 18) [2018-11-18 12:02:23,194 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_99ffbeb2-07be-4505-9f31-bc5c8b021964/bin-2019/utaipan/witness.graphml [2018-11-18 12:02:23,194 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:02:23,195 INFO L168 Benchmark]: Toolchain (without parser) took 3950.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 959.2 MB in the beginning and 1.0 GB in the end (delta: -76.7 MB). Peak memory consumption was 90.1 MB. Max. memory is 11.5 GB. [2018-11-18 12:02:23,195 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:02:23,196 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.36 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:02:23,196 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.17 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:02:23,196 INFO L168 Benchmark]: Boogie Preprocessor took 14.74 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:02:23,196 INFO L168 Benchmark]: RCFGBuilder took 251.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -165.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 12:02:23,196 INFO L168 Benchmark]: TraceAbstraction took 3475.87 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 38.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 70.5 MB). Peak memory consumption was 109.3 MB. Max. memory is 11.5 GB. [2018-11-18 12:02:23,197 INFO L168 Benchmark]: Witness Printer took 43.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. [2018-11-18 12:02:23,199 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 149.36 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.17 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.74 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 251.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -165.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3475.87 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 38.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 70.5 MB). Peak memory consumption was 109.3 MB. Max. memory is 11.5 GB. * Witness Printer took 43.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 12]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 12]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((((!(\old(a) == 63) || (((18 <= b && 2 * b + a <= 63) && 63 <= 2 * b + a) && b <= 18)) || (((b + a <= 63 && 18 <= b) && 63 <= b + a) && b <= 18)) || (a == 63 && b == 18)) || ((0 <= b && a <= 18) && 1 <= a && b <= 18)) || !(\old(b) == 18) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 locations, 8 error locations. SAFE Result, 3.4s OverallTime, 11 OverallIterations, 6 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 128 SDtfs, 618 SDslu, 453 SDs, 0 SdLazy, 769 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 477 GetRequests, 313 SyntacticMatches, 4 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 5 AbstIntIterations, 1 AbstIntStrong, 0.8888888888888888 AbsIntWeakeningRatio, 0.3888888888888889 AbsIntAvgWeakeningVarsNumRemoved, 1.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 121 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 16 PreInvPairs, 26 NumberOfFragments, 90 HoareAnnotationTreeSize, 16 FomulaSimplifications, 4604 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 518 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 424 NumberOfCodeBlocks, 404 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 580 ConstructedInterpolants, 50 QuantifiedInterpolants, 88054 SizeOfPredicates, 16 NumberOfNonLiveVariables, 291 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 23 InterpolantComputations, 6 PerfectInterpolantSequences, 267/538 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...