./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.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 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/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_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/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 0.1.23-635dfa2 [2018-12-09 19:22:31,868 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 19:22:31,869 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 19:22:31,877 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 19:22:31,877 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 19:22:31,877 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 19:22:31,878 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 19:22:31,879 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 19:22:31,879 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 19:22:31,880 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 19:22:31,880 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 19:22:31,880 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 19:22:31,881 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 19:22:31,881 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 19:22:31,882 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 19:22:31,882 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 19:22:31,883 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 19:22:31,883 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 19:22:31,884 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 19:22:31,885 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 19:22:31,885 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 19:22:31,886 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 19:22:31,888 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 19:22:31,888 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 19:22:31,888 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 19:22:31,889 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 19:22:31,889 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 19:22:31,890 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 19:22:31,890 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 19:22:31,890 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 19:22:31,891 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 19:22:31,891 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 19:22:31,891 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 19:22:31,891 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 19:22:31,892 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 19:22:31,892 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 19:22:31,892 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-12-09 19:22:31,900 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 19:22:31,901 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 19:22:31,901 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 19:22:31,901 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 19:22:31,902 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 19:22:31,902 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 19:22:31,902 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 19:22:31,902 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 19:22:31,902 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 19:22:31,902 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 19:22:31,902 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 19:22:31,903 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 19:22:31,903 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 19:22:31,903 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 19:22:31,903 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 19:22:31,904 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 19:22:31,904 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 19:22:31,904 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 19:22:31,904 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 19:22:31,904 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 19:22:31,904 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 19:22:31,905 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 19:22:31,905 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-09 19:22:31,905 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 19:22:31,905 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 19:22:31,905 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 19:22:31,905 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 19:22:31,905 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 19:22:31,906 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 19:22:31,906 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 19:22:31,906 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:22:31,906 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 19:22:31,906 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 19:22:31,906 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 19:22:31,907 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 19:22:31,907 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 19:22:31,907 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 19:22:31,907 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 19:22:31,907 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_f2cd13b4-2704-495d-a42e-3492b9b0dd25/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 [2018-12-09 19:22:31,929 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 19:22:31,936 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 19:22:31,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 19:22:31,939 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 19:22:31,939 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 19:22:31,940 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-12-09 19:22:31,976 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/data/55d4d97eb/12e0dbf313774408829f41fa9c051bc2/FLAG947f7a8b1 [2018-12-09 19:22:32,430 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 19:22:32,431 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-12-09 19:22:32,435 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/data/55d4d97eb/12e0dbf313774408829f41fa9c051bc2/FLAG947f7a8b1 [2018-12-09 19:22:32,444 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/data/55d4d97eb/12e0dbf313774408829f41fa9c051bc2 [2018-12-09 19:22:32,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 19:22:32,448 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 19:22:32,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 19:22:32,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 19:22:32,450 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 19:22:32,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59facd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32, skipping insertion in model container [2018-12-09 19:22:32,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 19:22:32,470 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 19:22:32,554 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:22:32,557 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 19:22:32,567 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:22:32,575 INFO L195 MainTranslator]: Completed translation [2018-12-09 19:22:32,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32 WrapperNode [2018-12-09 19:22:32,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 19:22:32,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 19:22:32,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 19:22:32,576 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 19:22:32,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 19:22:32,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 19:22:32,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 19:22:32,589 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 19:22:32,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (1/1) ... [2018-12-09 19:22:32,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 19:22:32,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 19:22:32,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 19:22:32,603 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 19:22:32,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:22:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 19:22:32,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 19:22:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 19:22:32,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 19:22:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 19:22:32,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 19:22:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 19:22:32,675 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 19:22:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2018-12-09 19:22:32,675 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2018-12-09 19:22:32,793 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 19:22:32,793 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 19:22:32,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:22:32 BoogieIcfgContainer [2018-12-09 19:22:32,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 19:22:32,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 19:22:32,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 19:22:32,797 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 19:22:32,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:22:32" (1/3) ... [2018-12-09 19:22:32,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31cc4a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:22:32, skipping insertion in model container [2018-12-09 19:22:32,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:22:32" (2/3) ... [2018-12-09 19:22:32,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31cc4a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:22:32, skipping insertion in model container [2018-12-09 19:22:32,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:22:32" (3/3) ... [2018-12-09 19:22:32,799 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-12-09 19:22:32,805 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 19:22:32,809 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-12-09 19:22:32,818 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-12-09 19:22:32,838 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 19:22:32,838 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 19:22:32,838 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 19:22:32,838 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 19:22:32,838 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 19:22:32,838 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 19:22:32,838 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 19:22:32,838 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 19:22:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-12-09 19:22:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-09 19:22:32,853 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:32,853 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:32,855 INFO L423 AbstractCegarLoop]: === Iteration 1 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:32,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1670294891, now seen corresponding path program 1 times [2018-12-09 19:22:32,859 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:32,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:32,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:32,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:32,887 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:32,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:22:32,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:22:32,958 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:22:32,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:22:32,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:22:32,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:22:32,969 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2018-12-09 19:22:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:33,052 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2018-12-09 19:22:33,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:22:33,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-09 19:22:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:33,060 INFO L225 Difference]: With dead ends: 91 [2018-12-09 19:22:33,060 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 19:22:33,063 INFO L631 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 [2018-12-09 19:22:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 19:22:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2018-12-09 19:22:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-09 19:22:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-12-09 19:22:33,085 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 9 [2018-12-09 19:22:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:33,085 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-12-09 19:22:33,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:22:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-12-09 19:22:33,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 19:22:33,086 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:33,086 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:33,086 INFO L423 AbstractCegarLoop]: === Iteration 2 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:33,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:33,087 INFO L82 PathProgramCache]: Analyzing trace with hash -239527988, now seen corresponding path program 1 times [2018-12-09 19:22:33,087 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:33,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:33,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,088 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:33,114 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:22:33,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 19:22:33,115 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:22:33,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:22:33,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:22:33,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:22:33,116 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2018-12-09 19:22:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:33,148 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-12-09 19:22:33,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:22:33,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-12-09 19:22:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:33,149 INFO L225 Difference]: With dead ends: 45 [2018-12-09 19:22:33,150 INFO L226 Difference]: Without dead ends: 30 [2018-12-09 19:22:33,150 INFO L631 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 [2018-12-09 19:22:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-09 19:22:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2018-12-09 19:22:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-09 19:22:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-09 19:22:33,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2018-12-09 19:22:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:33,155 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-09 19:22:33,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:22:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-09 19:22:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 19:22:33,155 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:33,155 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:33,156 INFO L423 AbstractCegarLoop]: === Iteration 3 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:33,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:33,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1831717912, now seen corresponding path program 1 times [2018-12-09 19:22:33,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:33,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:33,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,157 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:33,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:22:33,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 19:22:33,184 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:22:33,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 19:22:33,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 19:22:33,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-09 19:22:33,185 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2018-12-09 19:22:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:33,241 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-12-09 19:22:33,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 19:22:33,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-12-09 19:22:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:33,241 INFO L225 Difference]: With dead ends: 34 [2018-12-09 19:22:33,241 INFO L226 Difference]: Without dead ends: 32 [2018-12-09 19:22:33,242 INFO L631 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 [2018-12-09 19:22:33,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-09 19:22:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2018-12-09 19:22:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-09 19:22:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-12-09 19:22:33,245 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-12-09 19:22:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:33,245 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-12-09 19:22:33,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 19:22:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-12-09 19:22:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 19:22:33,246 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:33,246 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:33,246 INFO L423 AbstractCegarLoop]: === Iteration 4 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:33,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:33,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1831718104, now seen corresponding path program 1 times [2018-12-09 19:22:33,246 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:33,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:33,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,247 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:33,272 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:22:33,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 19:22:33,272 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:22:33,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 19:22:33,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 19:22:33,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-09 19:22:33,273 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2018-12-09 19:22:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:33,331 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-12-09 19:22:33,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 19:22:33,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-12-09 19:22:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:33,332 INFO L225 Difference]: With dead ends: 33 [2018-12-09 19:22:33,332 INFO L226 Difference]: Without dead ends: 31 [2018-12-09 19:22:33,332 INFO L631 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 [2018-12-09 19:22:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-09 19:22:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-12-09 19:22:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-09 19:22:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-12-09 19:22:33,335 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-12-09 19:22:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:33,335 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-12-09 19:22:33,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 19:22:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-12-09 19:22:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 19:22:33,336 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:33,336 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:33,336 INFO L423 AbstractCegarLoop]: === Iteration 5 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:33,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:33,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1250699491, now seen corresponding path program 1 times [2018-12-09 19:22:33,337 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:33,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:33,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,337 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:33,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:33,370 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:22:33,370 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-09 19:22:33,371 INFO L205 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [55], [64], [65], [66], [68], [75], [76], [77], [79] [2018-12-09 19:22:33,391 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:22:33,391 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:22:33,459 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 19:22:33,460 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 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. [2018-12-09 19:22:33,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:33,464 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 19:22:33,500 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 50% of their original sizes. [2018-12-09 19:22:33,500 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 19:22:33,511 INFO L418 sIntCurrentIteration]: We unified 16 AI predicates to 16 [2018-12-09 19:22:33,511 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 19:22:33,512 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-09 19:22:33,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2018-12-09 19:22:33,512 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:22:33,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:22:33,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:22:33,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:22:33,512 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-12-09 19:22:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:33,565 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-12-09 19:22:33,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:22:33,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-09 19:22:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:33,566 INFO L225 Difference]: With dead ends: 31 [2018-12-09 19:22:33,566 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 19:22:33,566 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 19:22:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 19:22:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-09 19:22:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 19:22:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-09 19:22:33,568 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2018-12-09 19:22:33,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:33,569 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-09 19:22:33,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:22:33,569 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-09 19:22:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 19:22:33,569 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:33,569 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:33,569 INFO L423 AbstractCegarLoop]: === Iteration 6 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:33,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:33,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1428194269, now seen corresponding path program 1 times [2018-12-09 19:22:33,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:33,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:33,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,570 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:33,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:33,598 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:22:33,598 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-09 19:22:33,598 INFO L205 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [55], [58], [60], [62], [64], [65], [75], [76], [77], [79] [2018-12-09 19:22:33,599 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:22:33,599 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:22:33,629 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:22:33,629 INFO L272 AbstractInterpreter]: Visited 16 different actions 32 times. Merged at 6 different actions 14 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. [2018-12-09 19:22:33,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:33,631 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:22:33,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:33,632 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:22:33,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:33,637 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:22:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:33,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:22:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:33,698 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:22:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:33,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:22:33,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2018-12-09 19:22:33,769 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:22:33,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 19:22:33,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 19:22:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-12-09 19:22:33,770 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-12-09 19:22:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:33,907 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2018-12-09 19:22:33,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 19:22:33,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2018-12-09 19:22:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:33,908 INFO L225 Difference]: With dead ends: 51 [2018-12-09 19:22:33,908 INFO L226 Difference]: Without dead ends: 43 [2018-12-09 19:22:33,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2018-12-09 19:22:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-09 19:22:33,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-12-09 19:22:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-09 19:22:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-12-09 19:22:33,912 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 17 [2018-12-09 19:22:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:33,912 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-12-09 19:22:33,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 19:22:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-12-09 19:22:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 19:22:33,913 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:33,913 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:33,913 INFO L423 AbstractCegarLoop]: === Iteration 7 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:33,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:33,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1428194461, now seen corresponding path program 1 times [2018-12-09 19:22:33,913 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:33,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:33,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:33,914 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:33,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:33,937 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:22:33,938 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-09 19:22:33,938 INFO L205 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [55], [58], [59], [60], [62], [75], [76], [77], [79] [2018-12-09 19:22:33,938 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:22:33,938 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:22:33,955 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:22:33,956 INFO L272 AbstractInterpreter]: Visited 15 different actions 30 times. Merged at 5 different actions 13 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. [2018-12-09 19:22:33,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:33,957 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:22:33,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:33,957 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:22:33,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:33,963 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:22:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:33,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:22:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:34,005 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:22:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:34,047 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:22:34,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 10 [2018-12-09 19:22:34,048 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:22:34,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 19:22:34,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 19:22:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-09 19:22:34,048 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2018-12-09 19:22:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:34,092 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-12-09 19:22:34,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 19:22:34,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-12-09 19:22:34,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:34,093 INFO L225 Difference]: With dead ends: 39 [2018-12-09 19:22:34,093 INFO L226 Difference]: Without dead ends: 38 [2018-12-09 19:22:34,093 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-12-09 19:22:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-09 19:22:34,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-12-09 19:22:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-09 19:22:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2018-12-09 19:22:34,098 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 17 [2018-12-09 19:22:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:34,099 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2018-12-09 19:22:34,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 19:22:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2018-12-09 19:22:34,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 19:22:34,099 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:34,099 INFO L402 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:34,100 INFO L423 AbstractCegarLoop]: === Iteration 8 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:34,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:34,100 INFO L82 PathProgramCache]: Analyzing trace with hash 518481683, now seen corresponding path program 1 times [2018-12-09 19:22:34,100 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:34,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:34,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:34,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:34,101 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 19:22:34,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:34,158 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:22:34,158 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-12-09 19:22:34,159 INFO L205 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [55], [58], [60], [62], [64], [65], [66], [68], [75], [76], [77], [79] [2018-12-09 19:22:34,159 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:22:34,160 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:22:34,192 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:22:34,192 INFO L272 AbstractInterpreter]: Visited 18 different actions 52 times. Merged at 8 different actions 29 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. [2018-12-09 19:22:34,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:34,194 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:22:34,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:34,194 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:22:34,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:34,203 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:22:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:34,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:22:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 19:22:34,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:22:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 19:22:34,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:22:34,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2018-12-09 19:22:34,352 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:22:34,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 19:22:34,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 19:22:34,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-12-09 19:22:34,352 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 13 states. [2018-12-09 19:22:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:34,528 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2018-12-09 19:22:34,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 19:22:34,529 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-12-09 19:22:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:34,529 INFO L225 Difference]: With dead ends: 83 [2018-12-09 19:22:34,529 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 19:22:34,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2018-12-09 19:22:34,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 19:22:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2018-12-09 19:22:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-09 19:22:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2018-12-09 19:22:34,534 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2018-12-09 19:22:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:34,534 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2018-12-09 19:22:34,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 19:22:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2018-12-09 19:22:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-09 19:22:34,534 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:34,534 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:34,535 INFO L423 AbstractCegarLoop]: === Iteration 9 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:34,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:34,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1568353806, now seen corresponding path program 1 times [2018-12-09 19:22:34,535 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:34,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:34,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:34,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:34,536 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:34,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:34,585 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:22:34,585 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 30 with the following transitions: [2018-12-09 19:22:34,585 INFO L205 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [55], [58], [59], [60], [62], [64], [66], [68], [75], [76], [77], [79] [2018-12-09 19:22:34,586 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:22:34,586 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:22:34,608 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:22:34,608 INFO L272 AbstractInterpreter]: Visited 18 different actions 54 times. Merged at 8 different actions 29 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. [2018-12-09 19:22:34,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:34,609 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:22:34,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:34,609 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:22:34,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:34,615 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:22:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:34,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:22:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:34,714 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:22:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:22:34,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:22:34,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-12-09 19:22:34,854 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:22:34,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 19:22:34,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 19:22:34,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2018-12-09 19:22:34,855 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 16 states. [2018-12-09 19:22:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:34,964 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2018-12-09 19:22:34,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 19:22:34,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2018-12-09 19:22:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:34,965 INFO L225 Difference]: With dead ends: 74 [2018-12-09 19:22:34,965 INFO L226 Difference]: Without dead ends: 50 [2018-12-09 19:22:34,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2018-12-09 19:22:34,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-09 19:22:34,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2018-12-09 19:22:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-09 19:22:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2018-12-09 19:22:34,972 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 29 [2018-12-09 19:22:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:34,973 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2018-12-09 19:22:34,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 19:22:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2018-12-09 19:22:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-09 19:22:34,973 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:34,973 INFO L402 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:34,974 INFO L423 AbstractCegarLoop]: === Iteration 10 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:34,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:34,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1145508093, now seen corresponding path program 2 times [2018-12-09 19:22:34,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:34,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:34,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:22:34,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:34,975 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-09 19:22:35,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:35,003 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:22:35,003 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:22:35,003 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:22:35,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:35,003 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:22:35,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 19:22:35,011 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 19:22:35,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-09 19:22:35,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 19:22:35,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:22:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-09 19:22:35,034 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:22:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-09 19:22:35,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:22:35,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2018-12-09 19:22:35,072 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:22:35,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 19:22:35,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 19:22:35,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-12-09 19:22:35,073 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 6 states. [2018-12-09 19:22:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:35,111 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2018-12-09 19:22:35,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 19:22:35,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2018-12-09 19:22:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:35,111 INFO L225 Difference]: With dead ends: 48 [2018-12-09 19:22:35,112 INFO L226 Difference]: Without dead ends: 47 [2018-12-09 19:22:35,112 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-09 19:22:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-09 19:22:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2018-12-09 19:22:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-09 19:22:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-09 19:22:35,115 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2018-12-09 19:22:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:35,116 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-09 19:22:35,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 19:22:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-09 19:22:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-09 19:22:35,116 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:22:35,116 INFO L402 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:22:35,116 INFO L423 AbstractCegarLoop]: === Iteration 11 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 19:22:35,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:22:35,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1145508285, now seen corresponding path program 2 times [2018-12-09 19:22:35,117 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:22:35,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:35,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:22:35,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:22:35,117 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:22:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:22:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 19:22:35,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:35,137 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:22:35,137 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:22:35,137 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:22:35,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:22:35,137 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:22:35,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 19:22:35,144 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 19:22:35,148 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 19:22:35,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 19:22:35,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:22:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 19:22:35,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:22:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 19:22:35,186 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 19:22:35,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 6 [2018-12-09 19:22:35,186 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:22:35,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 19:22:35,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 19:22:35,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-12-09 19:22:35,187 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 6 states. [2018-12-09 19:22:35,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:22:35,234 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-12-09 19:22:35,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 19:22:35,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2018-12-09 19:22:35,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:22:35,234 INFO L225 Difference]: With dead ends: 35 [2018-12-09 19:22:35,234 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 19:22:35,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-12-09 19:22:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 19:22:35,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 19:22:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 19:22:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 19:22:35,235 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-12-09 19:22:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:22:35,235 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 19:22:35,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 19:22:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 19:22:35,235 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 19:22:35,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 19:22:35,275 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 19:22:35,349 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 19:22:35,349 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 19:22:35,349 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 19:22:35,349 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 19:22:35,349 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 30 46) the Hoare annotation is: true [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 30 46) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L444 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (<= 63 main_~x~0) [2018-12-09 19:22:35,350 INFO L444 ceAbstractionStarter]: At program point L41(line 41) the Hoare annotation is: (<= 63 main_~x~0) [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 30 46) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L444 ceAbstractionStarter]: At program point L41-1(line 41) the Hoare annotation is: (<= 63 main_~x~0) [2018-12-09 19:22:35,350 INFO L444 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: (and (= main_~y~0 18) (= main_~x~0 63)) [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 12) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-09 19:22:35,350 INFO L448 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point gcd_testEXIT(lines 10 27) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point L19-2(lines 19 25) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point L13-3(lines 11 27) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L451 ceAbstractionStarter]: At program point gcd_testENTRY(lines 10 27) the Hoare annotation is: true [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 12) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L444 ceAbstractionStarter]: At program point L20-2(lines 19 25) the Hoare annotation is: (or (not (= |gcd_test_#in~a| 63)) (not (= |gcd_test_#in~b| 18)) (and (<= 0 gcd_test_~b) (<= 1 gcd_test_~a) (<= gcd_test_~a 2147483647) (<= gcd_test_~b 2147483647))) [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point L12(line 12) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point L12-1(line 12) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point L12-2(line 12) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point L12-4(lines 11 27) no Hoare annotation was computed. [2018-12-09 19:22:35,351 INFO L448 ceAbstractionStarter]: For program point gcd_testFINAL(lines 10 27) no Hoare annotation was computed. [2018-12-09 19:22:35,352 INFO L448 ceAbstractionStarter]: For program point gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-12-09 19:22:35,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:22:35 BoogieIcfgContainer [2018-12-09 19:22:35,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 19:22:35,358 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 19:22:35,359 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 19:22:35,359 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 19:22:35,359 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:22:32" (3/4) ... [2018-12-09 19:22:35,362 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 19:22:35,366 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 19:22:35,367 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 19:22:35,367 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-09 19:22:35,367 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd_test [2018-12-09 19:22:35,370 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-12-09 19:22:35,370 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-09 19:22:35,370 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 19:22:35,389 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!(\old(a) == 63) || !(\old(b) == 18)) || (((0 <= b && 1 <= a) && a <= 2147483647) && b <= 2147483647) [2018-12-09 19:22:35,404 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f2cd13b4-2704-495d-a42e-3492b9b0dd25/bin-2019/utaipan/witness.graphml [2018-12-09 19:22:35,404 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 19:22:35,404 INFO L168 Benchmark]: Toolchain (without parser) took 2957.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 950.8 MB in the beginning and 1.2 GB in the end (delta: -207.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:22:35,405 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:22:35,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 127.79 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 940.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-12-09 19:22:35,406 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.27 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:22:35,406 INFO L168 Benchmark]: Boogie Preprocessor took 14.16 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:22:35,406 INFO L168 Benchmark]: RCFGBuilder took 191.11 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 940.0 MB in the beginning and 1.1 GB in the end (delta: -162.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2018-12-09 19:22:35,406 INFO L168 Benchmark]: TraceAbstraction took 2563.59 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 44.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -56.8 MB). Peak memory consumption was 254.7 MB. Max. memory is 11.5 GB. [2018-12-09 19:22:35,407 INFO L168 Benchmark]: Witness Printer took 45.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2018-12-09 19:22:35,408 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 127.79 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 940.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.27 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.16 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 191.11 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 940.0 MB in the beginning and 1.1 GB in the end (delta: -162.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2563.59 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 44.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -56.8 MB). Peak memory consumption was 254.7 MB. Max. memory is 11.5 GB. * Witness Printer took 45.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 13]: 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 - PositiveResult [Line: 12]: 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: 21]: 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) || !(\old(b) == 18)) || (((0 <= b && 1 <= a) && a <= 2147483647) && b <= 2147483647) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 8 error locations. SAFE Result, 2.5s OverallTime, 11 OverallIterations, 6 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 505 SDslu, 337 SDs, 0 SdLazy, 642 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 411 GetRequests, 276 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 5 AbstIntIterations, 1 AbstIntStrong, 0.875 AbsIntWeakeningRatio, 0.4375 AbsIntAvgWeakeningVarsNumRemoved, 0.875 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 90 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 16 PreInvPairs, 25 NumberOfFragments, 44 HoareAnnotationTreeSize, 16 FomulaSimplifications, 2728 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 372 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 370 NumberOfCodeBlocks, 354 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 501 ConstructedInterpolants, 26 QuantifiedInterpolants, 52247 SizeOfPredicates, 16 NumberOfNonLiveVariables, 270 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 23 InterpolantComputations, 7 PerfectInterpolantSequences, 254/393 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...