./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4907b122df98ddbbf9083d03257189b61cf26f41 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4907b122df98ddbbf9083d03257189b61cf26f41 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:22:10,883 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:22:10,885 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:22:10,897 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:22:10,898 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:22:10,900 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:22:10,902 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:22:10,904 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:22:10,907 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:22:10,909 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:22:10,912 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:22:10,912 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:22:10,913 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:22:10,914 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:22:10,915 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:22:10,915 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:22:10,916 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:22:10,918 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:22:10,920 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:22:10,921 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:22:10,922 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:22:10,923 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:22:10,926 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:22:10,926 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:22:10,926 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:22:10,927 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:22:10,928 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:22:10,928 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:22:10,929 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:22:10,931 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:22:10,931 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:22:10,931 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:22:10,932 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:22:10,932 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:22:10,933 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:22:10,933 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:22:10,934 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 21:22:10,947 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:22:10,947 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:22:10,948 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:22:10,948 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 21:22:10,948 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 21:22:10,948 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 21:22:10,948 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 21:22:10,949 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 21:22:10,949 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 21:22:10,949 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 21:22:10,949 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 21:22:10,951 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:22:10,951 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 21:22:10,951 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:22:10,951 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 21:22:10,952 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:22:10,952 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:22:10,952 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:22:10,952 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:22:10,952 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 21:22:10,952 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:22:10,952 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:22:10,953 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:22:10,953 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:22:10,953 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:22:10,953 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:22:10,953 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:22:10,953 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:22:10,954 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:22:10,954 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:22:10,954 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 21:22:10,954 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:22:10,954 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:22:10,954 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:22:10,955 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_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4907b122df98ddbbf9083d03257189b61cf26f41 [2018-10-26 21:22:10,987 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:22:10,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:22:11,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:22:11,004 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:22:11,004 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:22:11,005 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-10-26 21:22:11,071 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/data/b1355b1d5/ab77fb0bd74e47bca2dbead9657d4773/FLAG77d851b12 [2018-10-26 21:22:11,458 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:22:11,459 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-10-26 21:22:11,465 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/data/b1355b1d5/ab77fb0bd74e47bca2dbead9657d4773/FLAG77d851b12 [2018-10-26 21:22:11,478 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/data/b1355b1d5/ab77fb0bd74e47bca2dbead9657d4773 [2018-10-26 21:22:11,481 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:22:11,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 21:22:11,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:22:11,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:22:11,487 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:22:11,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1814e7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11, skipping insertion in model container [2018-10-26 21:22:11,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:22:11,518 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:22:11,640 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:22:11,644 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:22:11,657 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:22:11,670 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:22:11,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11 WrapperNode [2018-10-26 21:22:11,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:22:11,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:22:11,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:22:11,671 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:22:11,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:22:11,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:22:11,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:22:11,691 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:22:11,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (1/1) ... [2018-10-26 21:22:11,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:22:11,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:22:11,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:22:11,706 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:22:11,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/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 [2018-10-26 21:22:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 21:22:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 21:22:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:22:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:22:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 21:22:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 21:22:12,066 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:22:12,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:22:12 BoogieIcfgContainer [2018-10-26 21:22:12,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:22:12,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:22:12,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:22:12,072 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:22:12,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:22:11" (1/3) ... [2018-10-26 21:22:12,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65088a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:22:12, skipping insertion in model container [2018-10-26 21:22:12,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:11" (2/3) ... [2018-10-26 21:22:12,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65088a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:22:12, skipping insertion in model container [2018-10-26 21:22:12,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:22:12" (3/3) ... [2018-10-26 21:22:12,075 INFO L112 eAbstractionObserver]: Analyzing ICFG drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-10-26 21:22:12,085 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:22:12,092 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:22:12,113 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:22:12,158 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:22:12,158 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:22:12,158 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:22:12,158 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:22:12,158 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:22:12,158 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:22:12,159 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:22:12,159 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:22:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-26 21:22:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-26 21:22:12,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:12,183 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:12,184 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:12,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:12,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2018-10-26 21:22:12,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:12,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:12,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:22:12,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:12,244 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:12,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:22:12,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:22:12,399 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 21:22:12,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:22:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:22:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:22:12,418 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2018-10-26 21:22:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:12,456 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-10-26 21:22:12,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:22:12,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-26 21:22:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:12,467 INFO L225 Difference]: With dead ends: 22 [2018-10-26 21:22:12,467 INFO L226 Difference]: Without dead ends: 11 [2018-10-26 21:22:12,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:22:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-26 21:22:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-26 21:22:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-26 21:22:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-26 21:22:12,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-26 21:22:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:12,503 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-26 21:22:12,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:22:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-26 21:22:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 21:22:12,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:12,504 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:12,504 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:12,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:12,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1683383028, now seen corresponding path program 1 times [2018-10-26 21:22:12,505 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:12,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:12,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:22:12,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:12,506 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:12,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:12,584 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:22:12,585 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2018-10-26 21:22:12,586 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [14], [15], [19], [20], [21] [2018-10-26 21:22:12,633 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 21:22:12,633 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 21:22:12,866 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 21:22:12,867 INFO L272 AbstractInterpreter]: Visited 10 different actions 24 times. Merged at 1 different actions 7 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2018-10-26 21:22:12,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:12,911 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 21:22:12,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:12,912 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/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 [2018-10-26 21:22:12,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:22:12,926 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 21:22:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:12,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:12,989 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:13,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:22:13,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2018-10-26 21:22:13,086 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:22:13,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:22:13,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:22:13,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:22:13,088 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-10-26 21:22:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:13,106 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-26 21:22:13,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:22:13,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-26 21:22:13,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:13,108 INFO L225 Difference]: With dead ends: 15 [2018-10-26 21:22:13,108 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 21:22:13,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:22:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 21:22:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-26 21:22:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-26 21:22:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-26 21:22:13,112 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-26 21:22:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:13,113 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-26 21:22:13,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:22:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-26 21:22:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 21:22:13,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:13,114 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:13,115 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:13,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:13,115 INFO L82 PathProgramCache]: Analyzing trace with hash 645203835, now seen corresponding path program 2 times [2018-10-26 21:22:13,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:13,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:13,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:22:13,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:13,116 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:13,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:13,198 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:22:13,198 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:22:13,198 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:22:13,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:13,199 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/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 [2018-10-26 21:22:13,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:22:13,205 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 21:22:13,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-26 21:22:13,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:22:13,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:13,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:13,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:22:13,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-10-26 21:22:13,458 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:22:13,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:22:13,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:22:13,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 21:22:13,459 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-10-26 21:22:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:13,524 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-26 21:22:13,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:22:13,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-26 21:22:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:13,526 INFO L225 Difference]: With dead ends: 16 [2018-10-26 21:22:13,526 INFO L226 Difference]: Without dead ends: 13 [2018-10-26 21:22:13,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 21:22:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-26 21:22:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-26 21:22:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-26 21:22:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-26 21:22:13,528 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-26 21:22:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:13,529 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-26 21:22:13,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:22:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-26 21:22:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 21:22:13,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:13,529 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:13,529 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:13,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:13,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1473580076, now seen corresponding path program 3 times [2018-10-26 21:22:13,530 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:13,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:13,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:22:13,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:13,531 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:13,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:13,605 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:22:13,606 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:22:13,606 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:22:13,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:13,606 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/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 [2018-10-26 21:22:13,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:22:13,624 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-26 21:22:13,634 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:22:13,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:22:13,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:13,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:13,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:22:13,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2018-10-26 21:22:13,737 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:22:13,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 21:22:13,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 21:22:13,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 21:22:13,738 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2018-10-26 21:22:13,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:13,758 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-26 21:22:13,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 21:22:13,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-10-26 21:22:13,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:13,760 INFO L225 Difference]: With dead ends: 17 [2018-10-26 21:22:13,760 INFO L226 Difference]: Without dead ends: 14 [2018-10-26 21:22:13,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 21:22:13,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-26 21:22:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-26 21:22:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 21:22:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-26 21:22:13,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-26 21:22:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:13,763 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-26 21:22:13,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 21:22:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-26 21:22:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 21:22:13,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:13,764 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:13,764 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:13,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:13,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1563595419, now seen corresponding path program 4 times [2018-10-26 21:22:13,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:13,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:13,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:22:13,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:13,769 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:13,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:13,942 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:22:13,943 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:22:13,943 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:22:13,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:13,943 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/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 [2018-10-26 21:22:13,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:22:13,953 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 21:22:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:13,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:13,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:14,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:22:14,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2018-10-26 21:22:14,048 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:22:14,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 21:22:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 21:22:14,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:14,049 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2018-10-26 21:22:14,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:14,067 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-26 21:22:14,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 21:22:14,068 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-26 21:22:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:14,069 INFO L225 Difference]: With dead ends: 18 [2018-10-26 21:22:14,069 INFO L226 Difference]: Without dead ends: 15 [2018-10-26 21:22:14,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-26 21:22:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-26 21:22:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-26 21:22:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-26 21:22:14,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-26 21:22:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:14,073 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-26 21:22:14,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 21:22:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-26 21:22:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 21:22:14,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:14,076 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:14,076 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:14,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:14,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1226755252, now seen corresponding path program 5 times [2018-10-26 21:22:14,077 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:14,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:14,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:22:14,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:14,078 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:14,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:14,438 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:22:14,439 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:22:14,439 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:22:14,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:14,439 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/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 [2018-10-26 21:22:14,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:22:14,446 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 21:22:14,455 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 21:22:14,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:22:14,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:14,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:14,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:22:14,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2018-10-26 21:22:14,543 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:22:14,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 21:22:14,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 21:22:14,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:14,544 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-26 21:22:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:14,580 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-26 21:22:14,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 21:22:14,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-26 21:22:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:14,582 INFO L225 Difference]: With dead ends: 19 [2018-10-26 21:22:14,582 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 21:22:14,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:14,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 21:22:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 21:22:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 21:22:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-26 21:22:14,587 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-26 21:22:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:14,588 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-26 21:22:14,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 21:22:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-26 21:22:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 21:22:14,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:14,589 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:14,589 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:14,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:14,589 INFO L82 PathProgramCache]: Analyzing trace with hash -625355333, now seen corresponding path program 6 times [2018-10-26 21:22:14,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:14,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:14,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:22:14,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:14,591 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:14,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:14,709 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:22:14,710 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:22:14,710 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:22:14,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:14,710 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/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 [2018-10-26 21:22:14,718 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:22:14,719 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-26 21:22:14,737 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:22:14,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:22:14,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:14,746 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:14,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:22:14,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2018-10-26 21:22:14,840 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:22:14,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 21:22:14,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 21:22:14,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:14,841 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2018-10-26 21:22:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:14,864 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-26 21:22:14,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 21:22:14,865 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-26 21:22:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:14,865 INFO L225 Difference]: With dead ends: 20 [2018-10-26 21:22:14,866 INFO L226 Difference]: Without dead ends: 17 [2018-10-26 21:22:14,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-26 21:22:14,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-26 21:22:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-26 21:22:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-26 21:22:14,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-26 21:22:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:14,872 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-26 21:22:14,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 21:22:14,872 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-26 21:22:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-26 21:22:14,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:14,873 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:14,875 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:14,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:14,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2088758676, now seen corresponding path program 7 times [2018-10-26 21:22:14,876 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:14,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:14,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:22:14,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:14,877 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:14,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:14,969 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:22:14,970 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:22:14,970 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:22:14,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:14,970 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:22:14,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:22:14,979 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 21:22:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:15,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:15,007 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:15,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:22:15,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2018-10-26 21:22:15,204 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:22:15,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 21:22:15,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 21:22:15,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:15,205 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2018-10-26 21:22:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:15,226 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-26 21:22:15,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 21:22:15,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2018-10-26 21:22:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:15,228 INFO L225 Difference]: With dead ends: 21 [2018-10-26 21:22:15,228 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 21:22:15,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:15,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 21:22:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-26 21:22:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 21:22:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-26 21:22:15,231 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-26 21:22:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:15,231 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-26 21:22:15,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 21:22:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-26 21:22:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-26 21:22:15,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:15,232 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:15,233 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:15,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash 326947035, now seen corresponding path program 8 times [2018-10-26 21:22:15,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:15,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:15,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:22:15,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:15,234 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:15,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:15,357 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:22:15,358 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:22:15,358 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:22:15,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:15,358 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:22:15,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:22:15,366 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 21:22:15,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-26 21:22:15,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:22:15,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:15,387 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:15,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:22:15,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2018-10-26 21:22:15,512 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:22:15,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 21:22:15,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 21:22:15,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:15,513 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2018-10-26 21:22:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:15,537 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-26 21:22:15,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 21:22:15,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2018-10-26 21:22:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:15,539 INFO L225 Difference]: With dead ends: 22 [2018-10-26 21:22:15,539 INFO L226 Difference]: Without dead ends: 19 [2018-10-26 21:22:15,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-26 21:22:15,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-26 21:22:15,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-26 21:22:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-26 21:22:15,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-26 21:22:15,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:15,543 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-26 21:22:15,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 21:22:15,543 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-26 21:22:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-26 21:22:15,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:15,544 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:15,544 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:15,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:15,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1545361012, now seen corresponding path program 9 times [2018-10-26 21:22:15,544 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:15,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:15,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:22:15,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:15,545 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:15,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:15,838 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:22:15,838 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:22:15,839 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:22:15,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:15,839 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:22:15,856 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:22:15,856 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-26 21:22:15,866 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:22:15,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:22:15,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:15,875 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:16,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:22:16,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2018-10-26 21:22:16,007 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:22:16,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 21:22:16,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 21:22:16,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:16,008 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 12 states. [2018-10-26 21:22:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:16,030 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-26 21:22:16,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 21:22:16,032 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-10-26 21:22:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:16,032 INFO L225 Difference]: With dead ends: 23 [2018-10-26 21:22:16,033 INFO L226 Difference]: Without dead ends: 20 [2018-10-26 21:22:16,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-26 21:22:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-26 21:22:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-26 21:22:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-26 21:22:16,036 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-26 21:22:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:16,037 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-26 21:22:16,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 21:22:16,037 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-26 21:22:16,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 21:22:16,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:16,040 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:16,041 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:16,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash 661488635, now seen corresponding path program 10 times [2018-10-26 21:22:16,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:22:16,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:16,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:22:16,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:22:16,043 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:22:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 21:22:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 21:22:16,078 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 21:22:16,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:22:16 BoogieIcfgContainer [2018-10-26 21:22:16,104 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:22:16,104 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 21:22:16,104 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 21:22:16,105 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 21:22:16,105 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:22:12" (3/4) ... [2018-10-26 21:22:16,109 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-26 21:22:16,109 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 21:22:16,110 INFO L168 Benchmark]: Toolchain (without parser) took 4628.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 953.1 MB in the beginning and 881.1 MB in the end (delta: 72.0 MB). Peak memory consumption was 266.0 MB. Max. memory is 11.5 GB. [2018-10-26 21:22:16,111 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:22:16,111 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.22 ms. Allocated memory is still 1.0 GB. Free memory was 953.1 MB in the beginning and 942.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:22:16,112 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.05 ms. Allocated memory is still 1.0 GB. Free memory is still 942.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:22:16,112 INFO L168 Benchmark]: Boogie Preprocessor took 15.17 ms. Allocated memory is still 1.0 GB. Free memory was 942.3 MB in the beginning and 939.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:22:16,113 INFO L168 Benchmark]: RCFGBuilder took 360.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 939.7 MB in the beginning and 1.2 GB in the end (delta: -244.1 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. [2018-10-26 21:22:16,113 INFO L168 Benchmark]: TraceAbstraction took 4036.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 884.3 MB in the end (delta: 299.4 MB). Peak memory consumption was 299.4 MB. Max. memory is 11.5 GB. [2018-10-26 21:22:16,114 INFO L168 Benchmark]: Witness Printer took 4.90 ms. Allocated memory is still 1.2 GB. Free memory was 884.3 MB in the beginning and 881.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2018-10-26 21:22:16,116 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 187.22 ms. Allocated memory is still 1.0 GB. Free memory was 953.1 MB in the beginning and 942.3 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 19.05 ms. Allocated memory is still 1.0 GB. Free memory is still 942.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.17 ms. Allocated memory is still 1.0 GB. Free memory was 942.3 MB in the beginning and 939.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 360.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 939.7 MB in the beginning and 1.2 GB in the end (delta: -244.1 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4036.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 884.3 MB in the end (delta: 299.4 MB). Peak memory consumption was 299.4 MB. Max. memory is 11.5 GB. * Witness Printer took 4.90 ms. Allocated memory is still 1.2 GB. Free memory was 884.3 MB in the beginning and 881.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 27]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 14. Possible FailurePath: [L1] int __return_main; VAL [\old(__return_main)=2, __return_main=0] [L7] float main__tick = 0.10000000149011612; [L8] float main__time = 0.0; [L9] int main__i; [L10] main__i = 0 VAL [__return_main=0, main__i=0, main__tick=2500000037252903/25000000000000000, main__time=0] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=1, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=2, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=3, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=4, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=5, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=6, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=7, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=8, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=9, main__tick=2500000037252903/25000000000000000] [L12] COND TRUE main__i < 10 [L14] main__time = main__time + main__tick [L15] main__i = main__i + 1 VAL [__return_main=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L12] COND FALSE !(main__i < 10) [L21] int __tmp_1; [L22] __tmp_1 = main__time != 1.0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L25] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L27] __VERIFIER_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. UNSAFE Result, 3.9s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 94 SDtfs, 0 SDslu, 298 SDs, 0 SdLazy, 107 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 318 GetRequests, 209 SyntacticMatches, 30 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 280 NumberOfCodeBlocks, 280 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 359 ConstructedInterpolants, 0 QuantifiedInterpolants, 9395 SizeOfPredicates, 9 NumberOfNonLiveVariables, 387 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 28 InterpolantComputations, 1 PerfectInterpolantSequences, 0/495 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:22:18,201 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:22:18,202 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:22:18,216 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:22:18,217 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:22:18,218 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:22:18,221 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:22:18,223 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:22:18,225 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:22:18,227 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:22:18,229 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:22:18,229 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:22:18,230 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:22:18,231 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:22:18,232 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:22:18,232 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:22:18,233 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:22:18,239 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:22:18,250 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:22:18,253 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:22:18,254 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:22:18,254 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:22:18,256 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:22:18,256 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:22:18,256 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:22:18,257 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:22:18,262 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:22:18,263 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:22:18,263 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:22:18,264 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:22:18,264 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:22:18,265 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:22:18,265 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:22:18,265 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:22:18,268 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:22:18,270 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:22:18,271 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-10-26 21:22:18,290 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:22:18,291 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:22:18,292 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:22:18,293 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 21:22:18,293 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 21:22:18,293 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 21:22:18,293 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 21:22:18,293 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 21:22:18,294 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:22:18,294 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 21:22:18,294 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 21:22:18,295 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:22:18,295 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:22:18,295 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:22:18,295 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:22:18,295 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-10-26 21:22:18,295 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-10-26 21:22:18,295 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 21:22:18,296 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:22:18,296 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:22:18,296 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:22:18,296 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:22:18,296 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:22:18,296 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:22:18,297 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:22:18,297 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:22:18,297 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:22:18,297 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:22:18,300 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-10-26 21:22:18,300 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:22:18,300 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-10-26 21:22:18,301 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-10-26 21:22:18,301 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4907b122df98ddbbf9083d03257189b61cf26f41 [2018-10-26 21:22:18,337 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:22:18,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:22:18,351 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:22:18,352 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:22:18,353 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:22:18,353 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-10-26 21:22:18,400 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/data/c348cf972/e2c36db81c6f45ab8242839af5c892bd/FLAGdb444bccc [2018-10-26 21:22:18,801 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:22:18,803 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-10-26 21:22:18,811 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/data/c348cf972/e2c36db81c6f45ab8242839af5c892bd/FLAGdb444bccc [2018-10-26 21:22:18,826 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/data/c348cf972/e2c36db81c6f45ab8242839af5c892bd [2018-10-26 21:22:18,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:22:18,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 21:22:18,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:22:18,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:22:18,837 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:22:18,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:22:18" (1/1) ... [2018-10-26 21:22:18,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@470950e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:18, skipping insertion in model container [2018-10-26 21:22:18,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:22:18" (1/1) ... [2018-10-26 21:22:18,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:22:18,873 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:22:19,039 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:22:19,045 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:22:19,061 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:22:19,075 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:22:19,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19 WrapperNode [2018-10-26 21:22:19,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:22:19,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:22:19,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:22:19,077 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:22:19,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (1/1) ... [2018-10-26 21:22:19,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (1/1) ... [2018-10-26 21:22:19,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:22:19,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:22:19,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:22:19,099 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:22:19,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (1/1) ... [2018-10-26 21:22:19,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (1/1) ... [2018-10-26 21:22:19,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (1/1) ... [2018-10-26 21:22:19,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (1/1) ... [2018-10-26 21:22:19,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (1/1) ... [2018-10-26 21:22:19,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (1/1) ... [2018-10-26 21:22:19,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (1/1) ... [2018-10-26 21:22:19,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:22:19,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:22:19,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:22:19,120 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:22:19,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/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 [2018-10-26 21:22:19,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 21:22:19,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 21:22:19,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:22:19,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:22:19,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 21:22:19,170 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 21:22:19,646 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:22:19,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:22:19 BoogieIcfgContainer [2018-10-26 21:22:19,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:22:19,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:22:19,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:22:19,651 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:22:19,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:22:18" (1/3) ... [2018-10-26 21:22:19,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cd7533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:22:19, skipping insertion in model container [2018-10-26 21:22:19,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:22:19" (2/3) ... [2018-10-26 21:22:19,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cd7533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:22:19, skipping insertion in model container [2018-10-26 21:22:19,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:22:19" (3/3) ... [2018-10-26 21:22:19,660 INFO L112 eAbstractionObserver]: Analyzing ICFG drift_tenth_true-unreach-call.c.p+cfa-reducer.c [2018-10-26 21:22:19,669 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:22:19,676 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:22:19,688 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:22:19,717 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:22:19,718 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:22:19,718 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:22:19,718 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:22:19,718 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:22:19,718 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:22:19,719 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:22:19,719 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:22:19,719 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:22:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-26 21:22:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-26 21:22:19,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:19,740 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:19,742 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:19,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:19,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2018-10-26 21:22:19,751 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:22:19,752 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-10-26 21:22:19,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:22:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:19,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:19,851 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-26 21:22:19,865 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:22:19,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:22:19,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:22:19,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:22:19,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:22:19,881 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2018-10-26 21:22:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:20,019 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-10-26 21:22:20,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:22:20,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-26 21:22:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:20,036 INFO L225 Difference]: With dead ends: 22 [2018-10-26 21:22:20,036 INFO L226 Difference]: Without dead ends: 11 [2018-10-26 21:22:20,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:22:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-26 21:22:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-26 21:22:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-26 21:22:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-26 21:22:20,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-26 21:22:20,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:20,086 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-26 21:22:20,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:22:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-26 21:22:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 21:22:20,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:20,087 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:20,088 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:20,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:20,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1683383028, now seen corresponding path program 1 times [2018-10-26 21:22:20,089 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:22:20,089 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-26 21:22:20,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-10-26 21:22:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:20,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:20,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:20,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:20,251 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/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 [2018-10-26 21:22:20,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:22:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:22:20,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:20,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:20,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 21:22:20,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 6 [2018-10-26 21:22:20,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 21:22:20,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 21:22:20,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:22:20,323 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-26 21:22:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:20,492 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-26 21:22:20,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 21:22:20,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-26 21:22:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:20,497 INFO L225 Difference]: With dead ends: 17 [2018-10-26 21:22:20,497 INFO L226 Difference]: Without dead ends: 14 [2018-10-26 21:22:20,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:22:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-26 21:22:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-26 21:22:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 21:22:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-26 21:22:20,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-10-26 21:22:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:20,503 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-26 21:22:20,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 21:22:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-26 21:22:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 21:22:20,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:20,504 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:20,505 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:20,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1563595419, now seen corresponding path program 2 times [2018-10-26 21:22:20,507 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:22:20,507 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-26 21:22:20,521 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-10-26 21:22:20,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:22:20,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:22:20,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:20,920 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:21,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:22:21,090 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/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 [2018-10-26 21:22:21,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:22:21,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:22:21,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:22:21,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:21,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:22:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:22:21,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 21:22:21,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 12 [2018-10-26 21:22:21,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 21:22:21,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 21:22:21,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:22:21,240 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2018-10-26 21:22:21,691 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 7 [2018-10-26 21:22:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:22:22,109 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2018-10-26 21:22:22,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 21:22:22,113 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2018-10-26 21:22:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:22:22,114 INFO L225 Difference]: With dead ends: 23 [2018-10-26 21:22:22,114 INFO L226 Difference]: Without dead ends: 20 [2018-10-26 21:22:22,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2018-10-26 21:22:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-26 21:22:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-26 21:22:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-26 21:22:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-26 21:22:22,122 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2018-10-26 21:22:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:22:22,122 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-26 21:22:22,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 21:22:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-26 21:22:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 21:22:22,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:22:22,124 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:22:22,124 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:22:22,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:22:22,124 INFO L82 PathProgramCache]: Analyzing trace with hash 661488635, now seen corresponding path program 3 times [2018-10-26 21:22:22,125 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:22:22,125 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-10-26 21:22:22,130 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-10-26 21:22:22,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 21:22:22,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:22:22,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:22:22,796 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 21:22:23,587 WARN L179 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-26 21:22:26,397 WARN L179 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 21:22:27,487 WARN L179 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-26 21:22:40,306 WARN L179 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 17 [2018-10-26 21:22:45,537 WARN L179 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 21:23:09,501 WARN L179 SmtUtils]: Spent 4.45 s on a formula simplification that was a NOOP. DAG size: 19 [2018-10-26 21:23:19,606 WARN L179 SmtUtils]: Spent 4.11 s on a formula simplification that was a NOOP. DAG size: 20 [2018-10-26 21:23:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 46 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:23:25,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:23:35,916 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-10-26 21:23:49,332 WARN L179 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-26 21:24:23,934 WARN L179 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 10 [2018-10-26 21:24:27,282 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 21:24:29,311 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-10-26 21:24:31,342 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 21:24:34,518 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 21:24:38,460 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 21:24:40,968 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 21:24:43,020 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-10-26 21:24:45,069 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 21:24:47,124 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-10-26 21:24:49,176 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 21:24:52,069 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 21:24:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 52 not checked. [2018-10-26 21:24:52,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:52,095 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ac95021-d20c-4a40-8fea-4be37b88cb3c/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:24:52,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:24:58,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 21:24:58,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:24:58,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:24:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 46 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:24:58,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:24:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 52 not checked. [2018-10-26 21:24:58,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 21:24:58,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14] total 26 [2018-10-26 21:24:58,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 21:24:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 21:24:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=227, Unknown=30, NotChecked=312, Total=650 [2018-10-26 21:24:58,204 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 26 states. [2018-10-26 21:25:00,287 WARN L854 $PredicateComparison]: unable to prove that (and (= ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__time~0) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0))))) is different from true [2018-10-26 21:25:02,346 WARN L854 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (= c_main_~main__time~0 (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0))) is different from true [2018-10-26 21:25:04,396 WARN L832 $PredicateComparison]: unable to prove that (and (= c_main_~main__time~0 (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0)) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from false [2018-10-26 21:25:07,932 WARN L832 $PredicateComparison]: unable to prove that (and (= c_main_~main__time~0 (fp.add RNE (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from false [2018-10-26 21:25:09,974 WARN L854 $PredicateComparison]: unable to prove that (and (= c_main_~main__time~0 (fp.add RNE (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from true [2018-10-26 21:25:12,012 WARN L832 $PredicateComparison]: unable to prove that (and (= (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__time~0) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from false [2018-10-26 21:25:14,055 WARN L854 $PredicateComparison]: unable to prove that (and (= (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__time~0) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from true [2018-10-26 21:25:16,100 WARN L854 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~main__time~0 c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= c_main_~main__tick~0 ((_ to_fp 8 24) RNE ((_ to_fp 11 53) RNE (/ 2500000037252903.0 25000000000000000.0)))) (= c_main_~main__time~0 (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE ((_ to_fp 8 24) RNE (_ +zero 11 53)) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0) c_main_~main__tick~0))) is different from true [2018-10-26 21:25:37,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 21:25:37,117 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:150) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:354) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:382) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:673) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:602) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 49 more [2018-10-26 21:25:37,121 INFO L168 Benchmark]: Toolchain (without parser) took 198289.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 951.9 MB in the beginning and 913.1 MB in the end (delta: 38.8 MB). Peak memory consumption was 150.5 MB. Max. memory is 11.5 GB. [2018-10-26 21:25:37,130 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:25:37,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.57 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 MB in the beginning and 941.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:25:37,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.86 ms. Allocated memory is still 1.0 GB. Free memory is still 941.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:25:37,131 INFO L168 Benchmark]: Boogie Preprocessor took 20.99 ms. Allocated memory is still 1.0 GB. Free memory was 941.2 MB in the beginning and 935.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-26 21:25:37,132 INFO L168 Benchmark]: RCFGBuilder took 527.22 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 935.8 MB in the beginning and 1.1 GB in the end (delta: -154.5 MB). Peak memory consumption was 21.8 MB. Max. memory is 11.5 GB. [2018-10-26 21:25:37,133 INFO L168 Benchmark]: TraceAbstraction took 197472.65 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 913.1 MB in the end (delta: 177.2 MB). Peak memory consumption was 177.2 MB. Max. memory is 11.5 GB. [2018-10-26 21:25:37,138 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 242.57 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 MB in the beginning and 941.2 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 21.86 ms. Allocated memory is still 1.0 GB. Free memory is still 941.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.99 ms. Allocated memory is still 1.0 GB. Free memory was 941.2 MB in the beginning and 935.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 527.22 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 935.8 MB in the beginning and 1.1 GB in the end (delta: -154.5 MB). Peak memory consumption was 21.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 197472.65 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 913.1 MB in the end (delta: 177.2 MB). Peak memory consumption was 177.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...