./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 aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/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_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/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-aa41828 [2018-11-23 10:03:42,888 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 10:03:42,889 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 10:03:42,898 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 10:03:42,898 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 10:03:42,899 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 10:03:42,900 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 10:03:42,901 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 10:03:42,902 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 10:03:42,903 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 10:03:42,903 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 10:03:42,904 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 10:03:42,904 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 10:03:42,905 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 10:03:42,906 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 10:03:42,907 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 10:03:42,907 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 10:03:42,909 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 10:03:42,910 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 10:03:42,911 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 10:03:42,912 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 10:03:42,913 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 10:03:42,914 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 10:03:42,914 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 10:03:42,915 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 10:03:42,915 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 10:03:42,916 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 10:03:42,916 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 10:03:42,917 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 10:03:42,918 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 10:03:42,918 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 10:03:42,918 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 10:03:42,918 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 10:03:42,919 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 10:03:42,919 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 10:03:42,920 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 10:03:42,920 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-11-23 10:03:42,930 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 10:03:42,930 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 10:03:42,931 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 10:03:42,931 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 10:03:42,931 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 10:03:42,931 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 10:03:42,931 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 10:03:42,931 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 10:03:42,932 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 10:03:42,932 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 10:03:42,932 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 10:03:42,932 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 10:03:42,932 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 10:03:42,933 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 10:03:42,933 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 10:03:42,933 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 10:03:42,933 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 10:03:42,933 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 10:03:42,933 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 10:03:42,933 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 10:03:42,934 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 10:03:42,934 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 10:03:42,934 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-23 10:03:42,934 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 10:03:42,934 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 10:03:42,934 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 10:03:42,935 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 10:03:42,935 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 10:03:42,935 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 10:03:42,935 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 10:03:42,935 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 10:03:42,935 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 10:03:42,935 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 10:03:42,936 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 10:03:42,936 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 10:03:42,936 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 10:03:42,936 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 10:03:42,936 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 10:03:42,936 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 10:03:42,936 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_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9918b49e0d76e4ce36b6a6760021b33460a8ae9b [2018-11-23 10:03:42,959 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 10:03:42,967 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 10:03:42,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 10:03:42,971 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 10:03:42,972 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 10:03:42,972 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-23 10:03:43,009 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/data/1928970ad/a2a6a1722db34232a9163597971f387f/FLAG2f3a9f816 [2018-11-23 10:03:43,350 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 10:03:43,350 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-23 10:03:43,355 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/data/1928970ad/a2a6a1722db34232a9163597971f387f/FLAG2f3a9f816 [2018-11-23 10:03:43,773 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/data/1928970ad/a2a6a1722db34232a9163597971f387f [2018-11-23 10:03:43,775 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 10:03:43,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 10:03:43,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 10:03:43,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 10:03:43,778 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 10:03:43,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eac3ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43, skipping insertion in model container [2018-11-23 10:03:43,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 10:03:43,800 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 10:03:43,901 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 10:03:43,904 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 10:03:43,914 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 10:03:43,922 INFO L195 MainTranslator]: Completed translation [2018-11-23 10:03:43,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43 WrapperNode [2018-11-23 10:03:43,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 10:03:43,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 10:03:43,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 10:03:43,923 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 10:03:43,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 10:03:43,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 10:03:43,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 10:03:43,935 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 10:03:43,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (1/1) ... [2018-11-23 10:03:43,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 10:03:43,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 10:03:43,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 10:03:43,948 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 10:03:43,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 10:03:44,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 10:03:44,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 10:03:44,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 10:03:44,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 10:03:44,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 10:03:44,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 10:03:44,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-23 10:03:44,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-23 10:03:44,018 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2018-11-23 10:03:44,018 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2018-11-23 10:03:44,149 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 10:03:44,149 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-23 10:03:44,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:03:44 BoogieIcfgContainer [2018-11-23 10:03:44,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 10:03:44,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 10:03:44,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 10:03:44,152 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 10:03:44,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:03:43" (1/3) ... [2018-11-23 10:03:44,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1b98e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:03:44, skipping insertion in model container [2018-11-23 10:03:44,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:03:43" (2/3) ... [2018-11-23 10:03:44,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1b98e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:03:44, skipping insertion in model container [2018-11-23 10:03:44,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:03:44" (3/3) ... [2018-11-23 10:03:44,155 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-11-23 10:03:44,161 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 10:03:44,165 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-11-23 10:03:44,174 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-11-23 10:03:44,192 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 10:03:44,192 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 10:03:44,192 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 10:03:44,192 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 10:03:44,193 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 10:03:44,193 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 10:03:44,193 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 10:03:44,193 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 10:03:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2018-11-23 10:03:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-23 10:03:44,207 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:44,208 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:44,209 INFO L423 AbstractCegarLoop]: === Iteration 1 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:44,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:44,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1670294891, now seen corresponding path program 1 times [2018-11-23 10:03:44,214 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:44,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:44,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:44,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:44,244 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:44,322 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 10:03:44,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 10:03:44,322 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 10:03:44,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 10:03:44,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 10:03:44,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 10:03:44,334 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2018-11-23 10:03:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:44,438 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2018-11-23 10:03:44,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 10:03:44,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-11-23 10:03:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:44,445 INFO L225 Difference]: With dead ends: 91 [2018-11-23 10:03:44,445 INFO L226 Difference]: Without dead ends: 34 [2018-11-23 10:03:44,448 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 [2018-11-23 10:03:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-23 10:03:44,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2018-11-23 10:03:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-23 10:03:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-11-23 10:03:44,473 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 9 [2018-11-23 10:03:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:44,473 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-11-23 10:03:44,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 10:03:44,473 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-11-23 10:03:44,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-23 10:03:44,474 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:44,474 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:44,474 INFO L423 AbstractCegarLoop]: === Iteration 2 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:44,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:44,475 INFO L82 PathProgramCache]: Analyzing trace with hash -239527988, now seen corresponding path program 1 times [2018-11-23 10:03:44,475 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:44,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:44,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:44,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:44,476 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:44,509 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 10:03:44,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 10:03:44,509 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 10:03:44,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 10:03:44,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 10:03:44,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 10:03:44,511 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2018-11-23 10:03:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:44,581 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-11-23 10:03:44,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 10:03:44,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-23 10:03:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:44,582 INFO L225 Difference]: With dead ends: 45 [2018-11-23 10:03:44,582 INFO L226 Difference]: Without dead ends: 30 [2018-11-23 10:03:44,583 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 [2018-11-23 10:03:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-23 10:03:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2018-11-23 10:03:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-23 10:03:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-11-23 10:03:44,588 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2018-11-23 10:03:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:44,588 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-11-23 10:03:44,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 10:03:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-11-23 10:03:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 10:03:44,589 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:44,589 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:44,590 INFO L423 AbstractCegarLoop]: === Iteration 3 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:44,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:44,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1831717912, now seen corresponding path program 1 times [2018-11-23 10:03:44,591 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:44,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:44,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:44,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:44,593 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:44,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 10:03:44,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 10:03:44,664 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 10:03:44,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 10:03:44,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 10:03:44,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 10:03:44,665 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2018-11-23 10:03:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:44,730 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2018-11-23 10:03:44,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 10:03:44,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-23 10:03:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:44,731 INFO L225 Difference]: With dead ends: 34 [2018-11-23 10:03:44,731 INFO L226 Difference]: Without dead ends: 32 [2018-11-23 10:03:44,732 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 [2018-11-23 10:03:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-23 10:03:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2018-11-23 10:03:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-23 10:03:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-11-23 10:03:44,736 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-11-23 10:03:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:44,736 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-11-23 10:03:44,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 10:03:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-11-23 10:03:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 10:03:44,736 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:44,737 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:44,737 INFO L423 AbstractCegarLoop]: === Iteration 4 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:44,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1831718104, now seen corresponding path program 1 times [2018-11-23 10:03:44,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:44,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:44,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:44,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:44,738 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:44,776 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 10:03:44,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 10:03:44,776 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 10:03:44,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 10:03:44,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 10:03:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 10:03:44,777 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2018-11-23 10:03:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:44,846 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-11-23 10:03:44,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 10:03:44,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-23 10:03:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:44,847 INFO L225 Difference]: With dead ends: 33 [2018-11-23 10:03:44,847 INFO L226 Difference]: Without dead ends: 31 [2018-11-23 10:03:44,848 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 [2018-11-23 10:03:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-23 10:03:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-11-23 10:03:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-23 10:03:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-11-23 10:03:44,853 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-11-23 10:03:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:44,853 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-11-23 10:03:44,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 10:03:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-11-23 10:03:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-23 10:03:44,854 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:44,854 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:44,854 INFO L423 AbstractCegarLoop]: === Iteration 5 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:44,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:44,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1250699491, now seen corresponding path program 1 times [2018-11-23 10:03:44,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:44,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:44,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:44,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:44,856 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:44,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:44,903 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 10:03:44,904 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-11-23 10:03:44,905 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [55], [64], [65], [66], [68], [75], [76], [77], [79] [2018-11-23 10:03:44,930 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 10:03:44,930 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 10:03:45,012 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 10:03:45,013 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. [2018-11-23 10:03:45,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:45,018 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 10:03:45,058 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 50% of their original sizes. [2018-11-23 10:03:45,058 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 10:03:45,087 INFO L415 sIntCurrentIteration]: We unified 16 AI predicates to 16 [2018-11-23 10:03:45,087 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 10:03:45,088 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 10:03:45,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2018-11-23 10:03:45,088 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 10:03:45,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 10:03:45,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 10:03:45,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 10:03:45,088 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-11-23 10:03:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:45,174 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-23 10:03:45,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 10:03:45,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-23 10:03:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:45,175 INFO L225 Difference]: With dead ends: 31 [2018-11-23 10:03:45,175 INFO L226 Difference]: Without dead ends: 22 [2018-11-23 10:03:45,175 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 [2018-11-23 10:03:45,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-23 10:03:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-11-23 10:03:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 10:03:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-23 10:03:45,178 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2018-11-23 10:03:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:45,178 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-23 10:03:45,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 10:03:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-23 10:03:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-23 10:03:45,179 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:45,179 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:45,179 INFO L423 AbstractCegarLoop]: === Iteration 6 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:45,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1428194269, now seen corresponding path program 1 times [2018-11-23 10:03:45,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:45,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:45,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:45,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:45,181 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:45,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:45,218 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 10:03:45,218 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-11-23 10:03:45,218 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [55], [58], [60], [62], [64], [65], [75], [76], [77], [79] [2018-11-23 10:03:45,219 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 10:03:45,219 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 10:03:45,252 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 10:03:45,252 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. [2018-11-23 10:03:45,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:45,255 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 10:03:45,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:45,255 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 10:03:45,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:45,262 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 10:03:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:45,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 10:03:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:45,319 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 10:03:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:45,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 10:03:45,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2018-11-23 10:03:45,402 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 10:03:45,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 10:03:45,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 10:03:45,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-11-23 10:03:45,403 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-11-23 10:03:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:45,572 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2018-11-23 10:03:45,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 10:03:45,572 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2018-11-23 10:03:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:45,573 INFO L225 Difference]: With dead ends: 51 [2018-11-23 10:03:45,573 INFO L226 Difference]: Without dead ends: 43 [2018-11-23 10:03:45,574 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 [2018-11-23 10:03:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-23 10:03:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-11-23 10:03:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-23 10:03:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-11-23 10:03:45,580 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 17 [2018-11-23 10:03:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:45,580 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-11-23 10:03:45,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 10:03:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-11-23 10:03:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-23 10:03:45,581 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:45,581 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:45,582 INFO L423 AbstractCegarLoop]: === Iteration 7 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:45,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1428194461, now seen corresponding path program 1 times [2018-11-23 10:03:45,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:45,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:45,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:45,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:45,584 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:45,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:45,623 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 10:03:45,623 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-11-23 10:03:45,623 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [55], [58], [59], [60], [62], [75], [76], [77], [79] [2018-11-23 10:03:45,624 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 10:03:45,624 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 10:03:45,645 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 10:03:45,645 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. [2018-11-23 10:03:45,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:45,647 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 10:03:45,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:45,647 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 10:03:45,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:45,653 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 10:03:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:45,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 10:03:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:45,705 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 10:03:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:45,769 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-23 10:03:45,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 10 [2018-11-23 10:03:45,769 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 10:03:45,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 10:03:45,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 10:03:45,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-23 10:03:45,770 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2018-11-23 10:03:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:45,813 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-11-23 10:03:45,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 10:03:45,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-11-23 10:03:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:45,814 INFO L225 Difference]: With dead ends: 39 [2018-11-23 10:03:45,814 INFO L226 Difference]: Without dead ends: 38 [2018-11-23 10:03:45,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-23 10:03:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-23 10:03:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-11-23 10:03:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-23 10:03:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2018-11-23 10:03:45,822 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 17 [2018-11-23 10:03:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:45,823 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2018-11-23 10:03:45,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 10:03:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2018-11-23 10:03:45,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-23 10:03:45,825 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:45,825 INFO L402 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:45,825 INFO L423 AbstractCegarLoop]: === Iteration 8 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:45,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash 518481683, now seen corresponding path program 1 times [2018-11-23 10:03:45,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:45,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:45,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:45,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:45,827 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 10:03:45,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:45,879 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 10:03:45,879 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-11-23 10:03:45,880 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [55], [58], [60], [62], [64], [65], [66], [68], [75], [76], [77], [79] [2018-11-23 10:03:45,880 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 10:03:45,881 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 10:03:45,928 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 10:03:45,929 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. [2018-11-23 10:03:45,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:45,938 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 10:03:45,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:45,938 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 10:03:45,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:45,945 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 10:03:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:45,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 10:03:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 10:03:46,023 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 10:03:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 10:03:46,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 10:03:46,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2018-11-23 10:03:46,094 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 10:03:46,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 10:03:46,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 10:03:46,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-11-23 10:03:46,095 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 13 states. [2018-11-23 10:03:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:46,318 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2018-11-23 10:03:46,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 10:03:46,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-11-23 10:03:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:46,319 INFO L225 Difference]: With dead ends: 83 [2018-11-23 10:03:46,319 INFO L226 Difference]: Without dead ends: 67 [2018-11-23 10:03:46,319 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 [2018-11-23 10:03:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-23 10:03:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2018-11-23 10:03:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-23 10:03:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2018-11-23 10:03:46,324 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2018-11-23 10:03:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:46,324 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2018-11-23 10:03:46,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 10:03:46,324 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2018-11-23 10:03:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-23 10:03:46,325 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:46,325 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:46,325 INFO L423 AbstractCegarLoop]: === Iteration 9 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:46,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:46,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1568353806, now seen corresponding path program 1 times [2018-11-23 10:03:46,325 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:46,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:46,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:46,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:46,326 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:46,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:46,390 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 10:03:46,390 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 30 with the following transitions: [2018-11-23 10:03:46,390 INFO L202 CegarAbsIntRunner]: [0], [4], [22], [31], [41], [46], [55], [58], [59], [60], [62], [64], [66], [68], [75], [76], [77], [79] [2018-11-23 10:03:46,390 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 10:03:46,391 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 10:03:46,421 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 10:03:46,421 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. [2018-11-23 10:03:46,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:46,426 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 10:03:46,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:46,426 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 10:03:46,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:46,438 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 10:03:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:46,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 10:03:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:46,579 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 10:03:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 10:03:46,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 10:03:46,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2018-11-23 10:03:46,724 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 10:03:46,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 10:03:46,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 10:03:46,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2018-11-23 10:03:46,725 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 16 states. [2018-11-23 10:03:46,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:46,844 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2018-11-23 10:03:46,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 10:03:46,845 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2018-11-23 10:03:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:46,846 INFO L225 Difference]: With dead ends: 74 [2018-11-23 10:03:46,846 INFO L226 Difference]: Without dead ends: 50 [2018-11-23 10:03:46,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2018-11-23 10:03:46,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-23 10:03:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2018-11-23 10:03:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-23 10:03:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2018-11-23 10:03:46,851 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 29 [2018-11-23 10:03:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:46,852 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2018-11-23 10:03:46,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 10:03:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2018-11-23 10:03:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-23 10:03:46,852 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:46,853 INFO L402 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:46,853 INFO L423 AbstractCegarLoop]: === Iteration 10 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:46,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:46,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1145508093, now seen corresponding path program 2 times [2018-11-23 10:03:46,853 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:46,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:46,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 10:03:46,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:46,854 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 10:03:46,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:46,882 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 10:03:46,882 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 10:03:46,882 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 10:03:46,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:46,882 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 10:03:46,889 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 10:03:46,889 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 10:03:46,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-23 10:03:46,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 10:03:46,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 10:03:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 10:03:46,932 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 10:03:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 10:03:46,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-23 10:03:46,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2018-11-23 10:03:46,971 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 10:03:46,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 10:03:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 10:03:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-11-23 10:03:46,972 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 6 states. [2018-11-23 10:03:47,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:47,010 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2018-11-23 10:03:47,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 10:03:47,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2018-11-23 10:03:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:47,011 INFO L225 Difference]: With dead ends: 48 [2018-11-23 10:03:47,011 INFO L226 Difference]: Without dead ends: 47 [2018-11-23 10:03:47,012 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 [2018-11-23 10:03:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-23 10:03:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2018-11-23 10:03:47,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-23 10:03:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-11-23 10:03:47,019 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2018-11-23 10:03:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:47,019 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-11-23 10:03:47,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 10:03:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-11-23 10:03:47,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-23 10:03:47,020 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 10:03:47,020 INFO L402 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 10:03:47,020 INFO L423 AbstractCegarLoop]: === Iteration 11 === [gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 10:03:47,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 10:03:47,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1145508285, now seen corresponding path program 2 times [2018-11-23 10:03:47,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 10:03:47,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:47,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 10:03:47,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 10:03:47,021 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 10:03:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 10:03:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-23 10:03:47,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:47,050 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 10:03:47,050 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 10:03:47,051 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 10:03:47,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 10:03:47,051 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 10:03:47,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 10:03:47,058 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 10:03:47,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 10:03:47,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 10:03:47,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 10:03:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-23 10:03:47,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 10:03:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-23 10:03:47,123 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-23 10:03:47,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 6 [2018-11-23 10:03:47,123 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 10:03:47,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 10:03:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 10:03:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-23 10:03:47,124 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 6 states. [2018-11-23 10:03:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 10:03:47,166 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-11-23 10:03:47,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 10:03:47,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2018-11-23 10:03:47,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 10:03:47,167 INFO L225 Difference]: With dead ends: 35 [2018-11-23 10:03:47,167 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 10:03:47,168 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 [2018-11-23 10:03:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 10:03:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 10:03:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 10:03:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 10:03:47,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-11-23 10:03:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 10:03:47,168 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 10:03:47,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 10:03:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 10:03:47,169 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 10:03:47,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 10:03:47,215 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 10:03:47,303 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 10:03:47,304 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 10:03:47,304 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 10:03:47,304 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 30 46) the Hoare annotation is: true [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 30 46) no Hoare annotation was computed. [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-11-23 10:03:47,304 INFO L444 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (<= 63 main_~x~0) [2018-11-23 10:03:47,304 INFO L444 ceAbstractionStarter]: At program point L41(line 41) the Hoare annotation is: (<= 63 main_~x~0) [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 30 46) no Hoare annotation was computed. [2018-11-23 10:03:47,304 INFO L444 ceAbstractionStarter]: At program point L41-1(line 41) the Hoare annotation is: (<= 63 main_~x~0) [2018-11-23 10:03:47,304 INFO L444 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: (and (= main_~y~0 18) (= main_~x~0 63)) [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2018-11-23 10:03:47,304 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2018-11-23 10:03:47,304 INFO L448 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point gcd_testErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point gcd_testErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point gcd_testErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 12) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point gcd_testEXIT(lines 10 27) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point L19-2(lines 19 25) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point L13-3(lines 11 27) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point gcd_testErr7ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L451 ceAbstractionStarter]: At program point gcd_testENTRY(lines 10 27) the Hoare annotation is: true [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point gcd_testErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point gcd_testErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point gcd_testErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 12) no Hoare annotation was computed. [2018-11-23 10:03:47,305 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-23 10:03:47,306 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))) [2018-11-23 10:03:47,306 INFO L448 ceAbstractionStarter]: For program point L12(line 12) no Hoare annotation was computed. [2018-11-23 10:03:47,306 INFO L448 ceAbstractionStarter]: For program point L12-1(line 12) no Hoare annotation was computed. [2018-11-23 10:03:47,306 INFO L448 ceAbstractionStarter]: For program point L12-2(line 12) no Hoare annotation was computed. [2018-11-23 10:03:47,306 INFO L448 ceAbstractionStarter]: For program point gcd_testErr6ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2018-11-23 10:03:47,306 INFO L448 ceAbstractionStarter]: For program point L12-4(lines 11 27) no Hoare annotation was computed. [2018-11-23 10:03:47,306 INFO L448 ceAbstractionStarter]: For program point gcd_testFINAL(lines 10 27) no Hoare annotation was computed. [2018-11-23 10:03:47,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 10:03:47 BoogieIcfgContainer [2018-11-23 10:03:47,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 10:03:47,313 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 10:03:47,313 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 10:03:47,314 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 10:03:47,314 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:03:44" (3/4) ... [2018-11-23 10:03:47,316 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 10:03:47,320 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 10:03:47,320 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 10:03:47,320 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-23 10:03:47,320 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd_test [2018-11-23 10:03:47,323 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-23 10:03:47,323 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-23 10:03:47,323 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 10:03:47,342 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!(\old(a) == 63) || !(\old(b) == 18)) || (((0 <= b && 1 <= a) && a <= 2147483647) && b <= 2147483647) [2018-11-23 10:03:47,355 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b0a70bb6-d609-4794-898e-31507f58007c/bin-2019/utaipan/witness.graphml [2018-11-23 10:03:47,356 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 10:03:47,356 INFO L168 Benchmark]: Toolchain (without parser) took 3581.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.6 MB). Free memory was 958.0 MB in the beginning and 962.8 MB in the end (delta: -4.8 MB). Peak memory consumption was 191.8 MB. Max. memory is 11.5 GB. [2018-11-23 10:03:47,357 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 10:03:47,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.33 ms. Allocated memory is still 1.0 GB. Free memory was 958.0 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 10:03:47,358 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.66 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 10:03:47,358 INFO L168 Benchmark]: Boogie Preprocessor took 13.17 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 10:03:47,358 INFO L168 Benchmark]: RCFGBuilder took 201.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -158.8 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2018-11-23 10:03:47,359 INFO L168 Benchmark]: TraceAbstraction took 3163.27 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 967.9 MB in the end (delta: 135.4 MB). Peak memory consumption was 206.2 MB. Max. memory is 11.5 GB. [2018-11-23 10:03:47,359 INFO L168 Benchmark]: Witness Printer took 42.34 ms. Allocated memory is still 1.2 GB. Free memory was 967.9 MB in the beginning and 962.8 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 11.5 GB. [2018-11-23 10:03:47,360 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 146.33 ms. Allocated memory is still 1.0 GB. Free memory was 958.0 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.66 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.17 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 201.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -158.8 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3163.27 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 967.9 MB in the end (delta: 135.4 MB). Peak memory consumption was 206.2 MB. Max. memory is 11.5 GB. * Witness Printer took 42.34 ms. Allocated memory is still 1.2 GB. Free memory was 967.9 MB in the beginning and 962.8 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 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: 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: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 12]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - 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, 3.1s OverallTime, 11 OverallIterations, 6 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 505 SDslu, 337 SDs, 0 SdLazy, 642 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 411 GetRequests, 276 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.2s 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, 1.1s 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...