./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/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 cd0c8f7b91fa815011541d5ffb41102d34132ba8 ........................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/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 cd0c8f7b91fa815011541d5ffb41102d34132ba8 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 19:59:02,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:59:02,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:59:02,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:59:02,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:59:02,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:59:02,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:59:02,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:59:02,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:59:02,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:59:02,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:59:02,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:59:02,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:59:02,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:59:02,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:59:02,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:59:02,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:59:02,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:59:02,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:59:02,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:59:02,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:59:02,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:59:02,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:59:02,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:59:02,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:59:02,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:59:02,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:59:02,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:59:02,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:59:02,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:59:02,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:59:02,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:59:02,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:59:02,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:59:02,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:59:02,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:59:02,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:59:02,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:59:02,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:59:02,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:59:02,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:59:02,041 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 19:59:02,051 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:59:02,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:59:02,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:59:02,051 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:59:02,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:59:02,052 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:59:02,052 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 19:59:02,052 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:59:02,052 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:59:02,052 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 19:59:02,052 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 19:59:02,052 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:59:02,052 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 19:59:02,053 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 19:59:02,053 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 19:59:02,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:59:02,053 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 19:59:02,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 19:59:02,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 19:59:02,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:59:02,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:59:02,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:59:02,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:59:02,054 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 19:59:02,054 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 19:59:02,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:59:02,055 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:59:02,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:59:02,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:59:02,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:59:02,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:59:02,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:59:02,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:59:02,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:59:02,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:59:02,056 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 19:59:02,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 19:59:02,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:59:02,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:59:02,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:59:02,057 INFO L138 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/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/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 -> cd0c8f7b91fa815011541d5ffb41102d34132ba8 [2019-12-07 19:59:02,164 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:59:02,172 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:59:02,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:59:02,175 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:59:02,175 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:59:02,175 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2019-12-07 19:59:02,215 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/data/e9b546ef8/715051b2ffcb4e988818f93d155d6091/FLAG8249e33bd [2019-12-07 19:59:02,568 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:59:02,568 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2019-12-07 19:59:02,572 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/data/e9b546ef8/715051b2ffcb4e988818f93d155d6091/FLAG8249e33bd [2019-12-07 19:59:02,581 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/data/e9b546ef8/715051b2ffcb4e988818f93d155d6091 [2019-12-07 19:59:02,583 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:59:02,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:59:02,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:59:02,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:59:02,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:59:02,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6998ea75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02, skipping insertion in model container [2019-12-07 19:59:02,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:59:02,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:59:02,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:59:02,763 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:59:02,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:59:02,797 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:59:02,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02 WrapperNode [2019-12-07 19:59:02,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:59:02,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:59:02,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:59:02,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:59:02,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:59:02,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:59:02,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:59:02,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:59:02,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (1/1) ... [2019-12-07 19:59:02,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:59:02,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:59:02,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:59:02,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:59:02,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/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 [2019-12-07 19:59:02,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 19:59:02,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-12-07 19:59:02,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:59:02,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:59:02,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 19:59:02,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 19:59:03,242 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:59:03,242 INFO L287 CfgBuilder]: Removed 18 assume(true) statements. [2019-12-07 19:59:03,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:59:03 BoogieIcfgContainer [2019-12-07 19:59:03,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:59:03,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:59:03,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:59:03,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:59:03,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:59:02" (1/3) ... [2019-12-07 19:59:03,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1029f6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:59:03, skipping insertion in model container [2019-12-07 19:59:03,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:02" (2/3) ... [2019-12-07 19:59:03,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1029f6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:59:03, skipping insertion in model container [2019-12-07 19:59:03,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:59:03" (3/3) ... [2019-12-07 19:59:03,248 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2019-12-07 19:59:03,254 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:59:03,259 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:59:03,266 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:59:03,281 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:59:03,281 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:59:03,281 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:59:03,281 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:59:03,281 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:59:03,281 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:59:03,282 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:59:03,282 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:59:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-12-07 19:59:03,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 19:59:03,295 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:03,295 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:03,295 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:59:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1118298700, now seen corresponding path program 1 times [2019-12-07 19:59:03,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:59:03,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517909088] [2019-12-07 19:59:03,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:59:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:03,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517909088] [2019-12-07 19:59:03,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:03,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 19:59:03,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461360791] [2019-12-07 19:59:03,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 19:59:03,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 19:59:03,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 19:59:03,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 19:59:03,393 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-12-07 19:59:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:03,404 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2019-12-07 19:59:03,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 19:59:03,405 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-12-07 19:59:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:03,411 INFO L225 Difference]: With dead ends: 35 [2019-12-07 19:59:03,411 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 19:59:03,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 19:59:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 19:59:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 19:59:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 19:59:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-12-07 19:59:03,434 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2019-12-07 19:59:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:03,434 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-12-07 19:59:03,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 19:59:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-12-07 19:59:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 19:59:03,435 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:03,435 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:03,435 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:59:03,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:03,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1848345075, now seen corresponding path program 1 times [2019-12-07 19:59:03,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 19:59:03,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605395799] [2019-12-07 19:59:03,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 19:59:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:59:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 19:59:03,489 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 19:59:03,489 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 19:59:03,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:59:03 BoogieIcfgContainer [2019-12-07 19:59:03,505 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:59:03,505 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:59:03,505 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:59:03,505 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:59:03,506 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:59:03" (3/4) ... [2019-12-07 19:59:03,508 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 19:59:03,508 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:59:03,510 INFO L168 Benchmark]: Toolchain (without parser) took 924.99 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 940.7 MB in the beginning and 1.0 GB in the end (delta: -81.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:03,510 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 959.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:59:03,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.25 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -154.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:03,511 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.70 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:03,511 INFO L168 Benchmark]: Boogie Preprocessor took 24.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:03,512 INFO L168 Benchmark]: RCFGBuilder took 386.17 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:03,512 INFO L168 Benchmark]: TraceAbstraction took 261.16 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:03,512 INFO L168 Benchmark]: Witness Printer took 2.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:03,515 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 959.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 213.25 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -154.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.70 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 386.17 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 261.16 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Witness Printer took 2.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 69, overapproximation of someUnaryFLOAToperation at line 65. Possible FailurePath: [L64] float x = 0.0f; [L65] float y = -0.0f; [L13] __uint32_t w; [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L23-L24] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L26-L27] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L29] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L32] return 0; [L36] COND TRUE __fpclassify_float(x) == 0 [L37] return y; [L66] float res = fmin_float(x, y); [L69] EXPR res == -0.0f && __signbit_float(res) == 1 [L69] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L70] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: 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 0.1.25-f470102 [2019-12-07 19:59:04,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 19:59:04,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 19:59:04,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 19:59:04,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 19:59:04,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 19:59:04,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 19:59:04,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 19:59:04,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 19:59:04,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 19:59:04,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 19:59:04,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 19:59:04,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 19:59:04,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 19:59:04,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 19:59:04,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 19:59:04,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 19:59:04,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 19:59:04,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 19:59:04,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 19:59:04,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 19:59:04,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 19:59:04,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 19:59:04,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 19:59:04,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 19:59:04,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 19:59:04,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 19:59:04,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 19:59:04,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 19:59:04,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 19:59:04,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 19:59:04,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 19:59:04,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 19:59:04,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 19:59:04,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 19:59:04,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 19:59:04,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 19:59:04,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 19:59:04,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 19:59:04,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 19:59:04,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 19:59:04,928 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 19:59:04,938 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 19:59:04,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 19:59:04,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 19:59:04,939 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 19:59:04,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 19:59:04,939 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 19:59:04,939 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 19:59:04,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 19:59:04,940 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 19:59:04,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 19:59:04,940 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 19:59:04,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 19:59:04,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 19:59:04,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 19:59:04,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 19:59:04,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 19:59:04,941 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 19:59:04,941 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 19:59:04,941 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 19:59:04,941 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 19:59:04,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 19:59:04,942 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 19:59:04,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 19:59:04,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 19:59:04,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 19:59:04,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 19:59:04,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 19:59:04,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 19:59:04,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 19:59:04,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 19:59:04,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 19:59:04,943 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 19:59:04,943 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 19:59:04,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 19:59:04,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 19:59:04,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 19:59:04,943 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/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 -> cd0c8f7b91fa815011541d5ffb41102d34132ba8 [2019-12-07 19:59:05,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 19:59:05,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 19:59:05,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 19:59:05,117 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 19:59:05,118 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 19:59:05,118 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2019-12-07 19:59:05,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/data/b21ba8bdb/840bb9095ec34e0e879ccff441deccf7/FLAGc2d9a0ab6 [2019-12-07 19:59:05,599 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 19:59:05,599 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/sv-benchmarks/c/float-newlib/float_req_bl_1232a.c [2019-12-07 19:59:05,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/data/b21ba8bdb/840bb9095ec34e0e879ccff441deccf7/FLAGc2d9a0ab6 [2019-12-07 19:59:05,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/data/b21ba8bdb/840bb9095ec34e0e879ccff441deccf7 [2019-12-07 19:59:05,613 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 19:59:05,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 19:59:05,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 19:59:05,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 19:59:05,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 19:59:05,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41944eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05, skipping insertion in model container [2019-12-07 19:59:05,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 19:59:05,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 19:59:05,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:59:05,749 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 19:59:05,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 19:59:05,782 INFO L208 MainTranslator]: Completed translation [2019-12-07 19:59:05,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05 WrapperNode [2019-12-07 19:59:05,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 19:59:05,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 19:59:05,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 19:59:05,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 19:59:05,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 19:59:05,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 19:59:05,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 19:59:05,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 19:59:05,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (1/1) ... [2019-12-07 19:59:05,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 19:59:05,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 19:59:05,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 19:59:05,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 19:59:05,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/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 [2019-12-07 19:59:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 19:59:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 19:59:05,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 19:59:05,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 19:59:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2019-12-07 19:59:05,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 19:59:06,132 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 19:59:06,132 INFO L287 CfgBuilder]: Removed 18 assume(true) statements. [2019-12-07 19:59:06,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:59:06 BoogieIcfgContainer [2019-12-07 19:59:06,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 19:59:06,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 19:59:06,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 19:59:06,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 19:59:06,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 07:59:05" (1/3) ... [2019-12-07 19:59:06,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f27a7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:59:06, skipping insertion in model container [2019-12-07 19:59:06,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 07:59:05" (2/3) ... [2019-12-07 19:59:06,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f27a7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 07:59:06, skipping insertion in model container [2019-12-07 19:59:06,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:59:06" (3/3) ... [2019-12-07 19:59:06,137 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2019-12-07 19:59:06,145 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 19:59:06,149 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 19:59:06,156 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 19:59:06,170 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 19:59:06,171 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 19:59:06,171 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 19:59:06,171 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 19:59:06,171 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 19:59:06,171 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 19:59:06,171 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 19:59:06,171 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 19:59:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-12-07 19:59:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 19:59:06,185 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:06,185 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:06,186 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:59:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-12-07 19:59:06,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:59:06,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969341782] [2019-12-07 19:59:06,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/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 [2019-12-07 19:59:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:06,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2019-12-07 19:59:06,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:59:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:06,257 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:59:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:06,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969341782] [2019-12-07 19:59:06,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:06,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-12-07 19:59:06,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330753485] [2019-12-07 19:59:06,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 19:59:06,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:59:06,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 19:59:06,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 19:59:06,277 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-12-07 19:59:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:06,290 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-12-07 19:59:06,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 19:59:06,291 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-12-07 19:59:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:06,297 INFO L225 Difference]: With dead ends: 62 [2019-12-07 19:59:06,298 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 19:59:06,300 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 19:59:06,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 19:59:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 19:59:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 19:59:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-12-07 19:59:06,323 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-12-07 19:59:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:06,323 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-12-07 19:59:06,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 19:59:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-12-07 19:59:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 19:59:06,324 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:06,324 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:06,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 19:59:06,525 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:59:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-12-07 19:59:06,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:59:06,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535794981] [2019-12-07 19:59:06,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 19:59:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:06,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 19:59:06,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:59:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:06,693 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:59:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:06,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535794981] [2019-12-07 19:59:06,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:06,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-12-07 19:59:06,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806819216] [2019-12-07 19:59:06,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 19:59:06,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:59:06,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 19:59:06,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 19:59:06,710 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2019-12-07 19:59:06,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:06,789 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-12-07 19:59:06,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 19:59:06,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-12-07 19:59:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:06,791 INFO L225 Difference]: With dead ends: 68 [2019-12-07 19:59:06,791 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 19:59:06,792 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-07 19:59:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 19:59:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2019-12-07 19:59:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 19:59:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-12-07 19:59:06,798 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-12-07 19:59:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:06,798 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-12-07 19:59:06,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 19:59:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-12-07 19:59:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 19:59:06,799 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:06,799 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:07,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 19:59:07,001 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:59:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:07,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-12-07 19:59:07,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:59:07,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470269645] [2019-12-07 19:59:07,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 19:59:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:07,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 19:59:07,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:59:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:07,110 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:59:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:07,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470269645] [2019-12-07 19:59:07,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:07,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-12-07 19:59:07,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677509514] [2019-12-07 19:59:07,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 19:59:07,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:59:07,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 19:59:07,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:59:07,132 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-12-07 19:59:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:07,175 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2019-12-07 19:59:07,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 19:59:07,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-12-07 19:59:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:07,176 INFO L225 Difference]: With dead ends: 52 [2019-12-07 19:59:07,176 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 19:59:07,177 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:59:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 19:59:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 19:59:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 19:59:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-12-07 19:59:07,180 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-12-07 19:59:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:07,181 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-12-07 19:59:07,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 19:59:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-12-07 19:59:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 19:59:07,181 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:07,181 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:07,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 19:59:07,383 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:59:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:07,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2019-12-07 19:59:07,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:59:07,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527423683] [2019-12-07 19:59:07,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 19:59:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:07,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 19:59:07,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:59:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:07,503 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:59:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:07,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527423683] [2019-12-07 19:59:07,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:07,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-12-07 19:59:07,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906724956] [2019-12-07 19:59:07,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 19:59:07,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:59:07,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 19:59:07,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 19:59:07,518 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2019-12-07 19:59:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:07,571 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-12-07 19:59:07,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 19:59:07,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-12-07 19:59:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:07,572 INFO L225 Difference]: With dead ends: 61 [2019-12-07 19:59:07,572 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 19:59:07,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-07 19:59:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 19:59:07,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2019-12-07 19:59:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 19:59:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-12-07 19:59:07,576 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-12-07 19:59:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:07,577 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-12-07 19:59:07,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 19:59:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-12-07 19:59:07,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 19:59:07,577 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:07,577 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:07,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-12-07 19:59:07,778 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:59:07,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:07,778 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2019-12-07 19:59:07,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:59:07,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887353029] [2019-12-07 19:59:07,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 19:59:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:07,825 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 19:59:07,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:59:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:07,839 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:59:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:07,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887353029] [2019-12-07 19:59:07,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:07,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 19:59:07,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96827888] [2019-12-07 19:59:07,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 19:59:07,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:59:07,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 19:59:07,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:59:07,854 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-12-07 19:59:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:07,862 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-12-07 19:59:07,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 19:59:07,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-12-07 19:59:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:07,863 INFO L225 Difference]: With dead ends: 38 [2019-12-07 19:59:07,863 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 19:59:07,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 19:59:07,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 19:59:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-07 19:59:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 19:59:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-12-07 19:59:07,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-12-07 19:59:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:07,867 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-12-07 19:59:07,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 19:59:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-12-07 19:59:07,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 19:59:07,868 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:07,868 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:08,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-12-07 19:59:08,069 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:59:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:08,071 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2019-12-07 19:59:08,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:59:08,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221528324] [2019-12-07 19:59:08,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/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 [2019-12-07 19:59:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:08,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 19:59:08,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:59:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:08,195 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:59:08,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:59:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:08,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221528324] [2019-12-07 19:59:08,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:08,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-12-07 19:59:08,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881334376] [2019-12-07 19:59:08,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 19:59:08,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:59:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 19:59:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-12-07 19:59:08,228 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2019-12-07 19:59:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:08,297 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-12-07 19:59:08,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 19:59:08,297 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-12-07 19:59:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:08,298 INFO L225 Difference]: With dead ends: 40 [2019-12-07 19:59:08,298 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 19:59:08,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-12-07 19:59:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 19:59:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-12-07 19:59:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 19:59:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-12-07 19:59:08,302 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2019-12-07 19:59:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:08,302 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-12-07 19:59:08,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 19:59:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-12-07 19:59:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 19:59:08,303 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:08,303 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:08,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-12-07 19:59:08,505 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:59:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:08,506 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2019-12-07 19:59:08,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:59:08,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664160122] [2019-12-07 19:59:08,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2019-12-07 19:59:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:08,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 19:59:08,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:59:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:08,607 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:59:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:08,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664160122] [2019-12-07 19:59:08,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:08,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-12-07 19:59:08,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386325304] [2019-12-07 19:59:08,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 19:59:08,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:59:08,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 19:59:08,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 19:59:08,622 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-12-07 19:59:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:08,658 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-12-07 19:59:08,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 19:59:08,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-12-07 19:59:08,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:08,659 INFO L225 Difference]: With dead ends: 43 [2019-12-07 19:59:08,659 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 19:59:08,659 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 19:59:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 19:59:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 19:59:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 19:59:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2019-12-07 19:59:08,662 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2019-12-07 19:59:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:08,662 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2019-12-07 19:59:08,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 19:59:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2019-12-07 19:59:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 19:59:08,662 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 19:59:08,662 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 19:59:08,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-12-07 19:59:08,864 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 19:59:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 19:59:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2019-12-07 19:59:08,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 19:59:08,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92480204] [2019-12-07 19:59:08,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-12-07 19:59:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 19:59:08,978 INFO L264 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 19:59:08,980 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 19:59:09,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:59:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:09,043 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 19:59:09,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 19:59:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 19:59:09,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92480204] [2019-12-07 19:59:09,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 19:59:09,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2019-12-07 19:59:09,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024562844] [2019-12-07 19:59:09,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 19:59:09,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 19:59:09,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 19:59:09,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2019-12-07 19:59:09,235 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand 16 states. [2019-12-07 19:59:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 19:59:09,384 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2019-12-07 19:59:09,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 19:59:09,385 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2019-12-07 19:59:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 19:59:09,385 INFO L225 Difference]: With dead ends: 23 [2019-12-07 19:59:09,385 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 19:59:09,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2019-12-07 19:59:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 19:59:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 19:59:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 19:59:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 19:59:09,386 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2019-12-07 19:59:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 19:59:09,387 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 19:59:09,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 19:59:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 19:59:09,387 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 19:59:09,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-12-07 19:59:09,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 19:59:09,788 INFO L246 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2019-12-07 19:59:09,788 INFO L246 CegarLoopResult]: For program point L36(lines 36 37) no Hoare annotation was computed. [2019-12-07 19:59:09,788 INFO L246 CegarLoopResult]: For program point L69-2(lines 69 72) no Hoare annotation was computed. [2019-12-07 19:59:09,788 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 19:59:09,788 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 19:59:09,789 INFO L242 CegarLoopResult]: At program point L53(lines 44 54) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= .cse0 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0))) (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= .cse0 ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_main_~res~0 .cse0) |ULTIMATE.start_main_#t~short9| (= |ULTIMATE.start_fmin_float_#res| .cse0) (= (_ bv0 32) (bvadd |ULTIMATE.start___signbit_float_#res| (_ bv4294967295 32))) (= (fp ((_ extract 31 31) ULTIMATE.start___signbit_float_~w~1) ((_ extract 30 23) ULTIMATE.start___signbit_float_~w~1) ((_ extract 22 0) ULTIMATE.start___signbit_float_~w~1)) .cse0) (= ULTIMATE.start___signbit_float_~x .cse0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2019-12-07 19:59:09,789 INFO L246 CegarLoopResult]: For program point L70(line 70) no Hoare annotation was computed. [2019-12-07 19:59:09,789 INFO L246 CegarLoopResult]: For program point L29(lines 29 32) no Hoare annotation was computed. [2019-12-07 19:59:09,789 INFO L246 CegarLoopResult]: For program point L29-1(lines 29 32) no Hoare annotation was computed. [2019-12-07 19:59:09,789 INFO L246 CegarLoopResult]: For program point L38(lines 38 39) no Hoare annotation was computed. [2019-12-07 19:59:09,789 INFO L246 CegarLoopResult]: For program point L47-1(lines 47 51) no Hoare annotation was computed. [2019-12-07 19:59:09,789 INFO L242 CegarLoopResult]: At program point L47-2(lines 47 51) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= .cse0 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0))) (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= .cse0 ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_main_~res~0 .cse0) |ULTIMATE.start_main_#t~short9| (= |ULTIMATE.start_fmin_float_#res| .cse0) (= ULTIMATE.start___signbit_float_~x .cse0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2019-12-07 19:59:09,789 INFO L246 CegarLoopResult]: For program point L47-3(lines 47 51) no Hoare annotation was computed. [2019-12-07 19:59:09,789 INFO L246 CegarLoopResult]: For program point L23(lines 23 32) no Hoare annotation was computed. [2019-12-07 19:59:09,789 INFO L246 CegarLoopResult]: For program point L23-1(lines 23 32) no Hoare annotation was computed. [2019-12-07 19:59:09,790 INFO L246 CegarLoopResult]: For program point L15-1(lines 15 19) no Hoare annotation was computed. [2019-12-07 19:59:09,790 INFO L242 CegarLoopResult]: At program point L15-2(lines 15 19) the Hoare annotation is: (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmin_float_~y (fp.neg (_ +zero 8 24)))) [2019-12-07 19:59:09,790 INFO L246 CegarLoopResult]: For program point L15-3(lines 12 33) no Hoare annotation was computed. [2019-12-07 19:59:09,790 INFO L246 CegarLoopResult]: For program point L15-5(lines 15 19) no Hoare annotation was computed. [2019-12-07 19:59:09,790 INFO L242 CegarLoopResult]: At program point L15-6(lines 15 19) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= .cse0 ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmin_float_~y .cse0))) [2019-12-07 19:59:09,790 INFO L246 CegarLoopResult]: For program point L15-7(lines 12 33) no Hoare annotation was computed. [2019-12-07 19:59:09,790 INFO L242 CegarLoopResult]: At program point L32(lines 12 33) the Hoare annotation is: (and (= (_ +zero 8 24) (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0))) (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= (_ bv2 32) |ULTIMATE.start___fpclassify_float_#res|) (= ULTIMATE.start_fmin_float_~y (fp.neg (_ +zero 8 24)))) [2019-12-07 19:59:09,790 INFO L246 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2019-12-07 19:59:09,790 INFO L242 CegarLoopResult]: At program point L32-1(lines 12 33) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= .cse0 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0))) (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) (= .cse0 ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmin_float_~y .cse0))) [2019-12-07 19:59:09,791 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 70) no Hoare annotation was computed. [2019-12-07 19:59:09,791 INFO L249 CegarLoopResult]: At program point L74(lines 56 75) the Hoare annotation is: true [2019-12-07 19:59:09,791 INFO L246 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2019-12-07 19:59:09,791 INFO L246 CegarLoopResult]: For program point L41-2(line 41) no Hoare annotation was computed. [2019-12-07 19:59:09,791 INFO L242 CegarLoopResult]: At program point L41-3(lines 35 42) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= .cse0 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0))) (= ULTIMATE.start_fmin_float_~x (_ +zero 8 24)) (= .cse0 ULTIMATE.start___fpclassify_float_~x) (= |ULTIMATE.start_fmin_float_#res| .cse0) (= ULTIMATE.start_fmin_float_~y .cse0))) [2019-12-07 19:59:09,791 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 19:59:09,791 INFO L246 CegarLoopResult]: For program point L26(lines 26 32) no Hoare annotation was computed. [2019-12-07 19:59:09,791 INFO L246 CegarLoopResult]: For program point L26-1(lines 26 32) no Hoare annotation was computed. [2019-12-07 19:59:09,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 07:59:09 BoogieIcfgContainer [2019-12-07 19:59:09,805 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 19:59:09,805 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 19:59:09,805 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 19:59:09,805 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 19:59:09,805 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 07:59:06" (3/4) ... [2019-12-07 19:59:09,808 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 19:59:09,816 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2019-12-07 19:59:09,816 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-12-07 19:59:09,816 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 19:59:09,834 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && x == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && 2bv32 == \result) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2019-12-07 19:59:09,834 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && x == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2019-12-07 19:59:09,835 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && x == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && res == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && aux-res == -0.0f && __signbit_float(res) == 1-aux) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2019-12-07 19:59:09,835 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && x == ~Pluszero~LONGDOUBLE()) && !(0bv32 == \result)) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2019-12-07 19:59:09,835 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && x == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && res == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && aux-res == -0.0f && __signbit_float(res) == 1-aux) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 0bv32 == ~bvadd64(\result, 4294967295bv32)) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) [2019-12-07 19:59:09,855 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f41ae5ef-6f65-429a-9ba5-b62818022533/bin/utaipan/witness.graphml [2019-12-07 19:59:09,855 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 19:59:09,856 INFO L168 Benchmark]: Toolchain (without parser) took 4242.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 952.4 MB in the beginning and 821.2 MB in the end (delta: 131.2 MB). Peak memory consumption was 268.0 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:09,857 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:59:09,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.22 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:09,857 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -184.1 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:09,857 INFO L168 Benchmark]: Boogie Preprocessor took 24.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 19:59:09,858 INFO L168 Benchmark]: RCFGBuilder took 262.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:09,858 INFO L168 Benchmark]: TraceAbstraction took 3671.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 828.1 MB in the end (delta: 272.7 MB). Peak memory consumption was 272.7 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:09,858 INFO L168 Benchmark]: Witness Printer took 50.23 ms. Allocated memory is still 1.2 GB. Free memory was 828.1 MB in the beginning and 821.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-07 19:59:09,859 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 168.22 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 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 61.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -184.1 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 262.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3671.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 828.1 MB in the end (delta: 272.7 MB). Peak memory consumption was 272.7 MB. Max. memory is 11.5 GB. * Witness Printer took 50.23 ms. Allocated memory is still 1.2 GB. Free memory was 828.1 MB in the beginning and 821.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 70]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: (((~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && x == ~Pluszero~LONGDOUBLE()) && !(0bv32 == \result)) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: ((((((((~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && x == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && res == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && aux-res == -0.0f && __signbit_float(res) == 1-aux) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 0bv32 == ~bvadd64(\result, 4294967295bv32)) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: (((~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && x == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && 2bv32 == \result) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && x == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (x == ~Pluszero~LONGDOUBLE() && ~Pluszero~LONGDOUBLE() == x) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: ((((((~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) && x == ~Pluszero~LONGDOUBLE()) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && res == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && aux-res == -0.0f && __signbit_float(res) == 1-aux) && \result == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (x == ~Pluszero~LONGDOUBLE() && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && y == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: SAFE, OverallTime: 3.4s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 234 SDtfs, 215 SDslu, 432 SDs, 0 SdLazy, 153 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 16 NumberOfFragments, 184 HoareAnnotationTreeSize, 8 FomulaSimplifications, 48 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 240 ConstructedInterpolants, 15 QuantifiedInterpolants, 16152 SizeOfPredicates, 38 NumberOfNonLiveVariables, 399 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...