./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1032b_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1032b_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7fdec7243d1dcfe44b7db1591097bb1f5b9c1d53 ......................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1032b_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7fdec7243d1dcfe44b7db1591097bb1f5b9c1d53 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 12:17:24,402 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 12:17:24,403 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 12:17:24,409 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 12:17:24,409 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 12:17:24,409 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 12:17:24,410 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 12:17:24,411 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 12:17:24,411 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 12:17:24,412 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 12:17:24,412 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 12:17:24,412 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 12:17:24,413 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 12:17:24,413 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 12:17:24,414 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 12:17:24,414 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 12:17:24,415 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 12:17:24,415 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 12:17:24,416 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 12:17:24,417 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 12:17:24,417 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 12:17:24,418 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 12:17:24,419 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 12:17:24,419 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 12:17:24,419 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 12:17:24,420 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 12:17:24,420 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 12:17:24,421 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 12:17:24,421 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 12:17:24,421 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 12:17:24,422 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 12:17:24,422 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 12:17:24,422 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 12:17:24,422 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 12:17:24,423 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 12:17:24,423 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 12:17:24,423 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 12:17:24,430 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 12:17:24,430 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 12:17:24,431 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 12:17:24,431 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 12:17:24,431 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 12:17:24,431 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 12:17:24,431 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 12:17:24,431 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 12:17:24,431 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 12:17:24,431 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 12:17:24,431 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 12:17:24,432 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 12:17:24,432 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 12:17:24,432 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 12:17:24,432 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 12:17:24,432 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 12:17:24,432 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 12:17:24,432 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 12:17:24,432 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 12:17:24,433 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 12:17:24,433 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 12:17:24,433 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 12:17:24,433 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 12:17:24,433 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 12:17:24,433 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 12:17:24,433 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 12:17:24,433 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 12:17:24,433 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 12:17:24,433 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 12:17:24,434 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 12:17:24,434 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 12:17:24,434 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 12:17:24,434 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 12:17:24,434 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 12:17:24,434 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 12:17:24,434 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 12:17:24,434 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7fdec7243d1dcfe44b7db1591097bb1f5b9c1d53 [2018-12-02 12:17:24,451 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 12:17:24,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 12:17:24,460 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 12:17:24,461 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 12:17:24,461 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 12:17:24,461 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1032b_true-unreach-call.c [2018-12-02 12:17:24,497 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/data/8e986526f/93cb650c910c497fa61b56114a5adbee/FLAGb2299284f [2018-12-02 12:17:24,931 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 12:17:24,932 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/sv-benchmarks/c/float-newlib/float_req_bl_1032b_true-unreach-call.c [2018-12-02 12:17:24,935 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/data/8e986526f/93cb650c910c497fa61b56114a5adbee/FLAGb2299284f [2018-12-02 12:17:24,943 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/data/8e986526f/93cb650c910c497fa61b56114a5adbee [2018-12-02 12:17:24,945 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 12:17:24,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 12:17:24,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 12:17:24,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 12:17:24,948 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 12:17:24,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:17:24" (1/1) ... [2018-12-02 12:17:24,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97cb65a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:24, skipping insertion in model container [2018-12-02 12:17:24,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:17:24" (1/1) ... [2018-12-02 12:17:24,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 12:17:24,970 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 12:17:25,068 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 12:17:25,070 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 12:17:25,085 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 12:17:25,097 INFO L195 MainTranslator]: Completed translation [2018-12-02 12:17:25,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25 WrapperNode [2018-12-02 12:17:25,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 12:17:25,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 12:17:25,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 12:17:25,098 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 12:17:25,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (1/1) ... [2018-12-02 12:17:25,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (1/1) ... [2018-12-02 12:17:25,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 12:17:25,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 12:17:25,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 12:17:25,112 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 12:17:25,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (1/1) ... [2018-12-02 12:17:25,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (1/1) ... [2018-12-02 12:17:25,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (1/1) ... [2018-12-02 12:17:25,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (1/1) ... [2018-12-02 12:17:25,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (1/1) ... [2018-12-02 12:17:25,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (1/1) ... [2018-12-02 12:17:25,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (1/1) ... [2018-12-02 12:17:25,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 12:17:25,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 12:17:25,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 12:17:25,161 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 12:17:25,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 12:17:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 12:17:25,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 12:17:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2018-12-02 12:17:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 12:17:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 12:17:25,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 12:17:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-12-02 12:17:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 12:17:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2018-12-02 12:17:25,195 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2018-12-02 12:17:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 12:17:25,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 12:17:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-02 12:17:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2018-12-02 12:17:25,195 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2018-12-02 12:17:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 12:17:25,324 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 12:17:25,325 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-02 12:17:25,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:17:25 BoogieIcfgContainer [2018-12-02 12:17:25,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 12:17:25,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 12:17:25,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 12:17:25,327 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 12:17:25,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:17:24" (1/3) ... [2018-12-02 12:17:25,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a2389b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:17:25, skipping insertion in model container [2018-12-02 12:17:25,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:25" (2/3) ... [2018-12-02 12:17:25,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a2389b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:17:25, skipping insertion in model container [2018-12-02 12:17:25,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:17:25" (3/3) ... [2018-12-02 12:17:25,330 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032b_true-unreach-call.c [2018-12-02 12:17:25,336 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 12:17:25,341 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 12:17:25,350 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 12:17:25,368 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 12:17:25,368 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 12:17:25,368 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 12:17:25,368 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 12:17:25,369 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 12:17:25,369 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 12:17:25,369 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 12:17:25,369 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 12:17:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2018-12-02 12:17:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-02 12:17:25,384 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 12:17:25,385 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:17:25,386 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 12:17:25,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:17:25,391 INFO L82 PathProgramCache]: Analyzing trace with hash 564888569, now seen corresponding path program 1 times [2018-12-02 12:17:25,393 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 12:17:25,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:17:25,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:17:25,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:17:25,423 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 12:17:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:17:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 12:17:25,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 12:17:25,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 12:17:25,466 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 12:17:25,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 12:17:25,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 12:17:25,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 12:17:25,477 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2018-12-02 12:17:25,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:17:25,490 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2018-12-02 12:17:25,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 12:17:25,491 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-12-02 12:17:25,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 12:17:25,496 INFO L225 Difference]: With dead ends: 68 [2018-12-02 12:17:25,496 INFO L226 Difference]: Without dead ends: 34 [2018-12-02 12:17:25,498 INFO L631 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 [2018-12-02 12:17:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-02 12:17:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-12-02 12:17:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-02 12:17:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2018-12-02 12:17:25,520 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2018-12-02 12:17:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 12:17:25,521 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2018-12-02 12:17:25,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 12:17:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2018-12-02 12:17:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 12:17:25,521 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 12:17:25,521 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:17:25,521 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 12:17:25,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:17:25,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1333163618, now seen corresponding path program 1 times [2018-12-02 12:17:25,522 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 12:17:25,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:17:25,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:17:25,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 12:17:25,523 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 12:17:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:17:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 12:17:25,575 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 12:17:25,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:17:25 BoogieIcfgContainer [2018-12-02 12:17:25,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 12:17:25,592 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 12:17:25,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 12:17:25,592 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 12:17:25,592 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:17:25" (3/4) ... [2018-12-02 12:17:25,594 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 12:17:25,594 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 12:17:25,595 INFO L168 Benchmark]: Toolchain (without parser) took 649.72 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 950.8 MB in the beginning and 1.0 GB in the end (delta: -90.6 MB). Peak memory consumption was 4.8 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:25,596 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 12:17:25,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.97 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 938.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:25,596 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.56 ms. Allocated memory is still 1.0 GB. Free memory was 938.9 MB in the beginning and 936.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:25,597 INFO L168 Benchmark]: Boogie Preprocessor took 48.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 936.2 MB in the beginning and 1.1 GB in the end (delta: -157.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:25,597 INFO L168 Benchmark]: RCFGBuilder took 164.23 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:25,597 INFO L168 Benchmark]: TraceAbstraction took 266.01 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: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:25,598 INFO L168 Benchmark]: Witness Printer took 2.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 12:17:25,600 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.97 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 938.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.56 ms. Allocated memory is still 1.0 GB. Free memory was 938.9 MB in the beginning and 936.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 48.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 936.2 MB in the beginning and 1.1 GB in the end (delta: -157.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 164.23 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 266.01 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: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. * Witness Printer took 2.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 79, overapproximation of bitwiseAnd at line 23, overapproximation of someUnaryFLOAToperation at line 75, overapproximation of someBinaryArithmeticFLOAToperation at line 43. Possible FailurePath: [L75] float x = -0.0f; [L76] CALL, EXPR round_float(x) VAL [\old(x)=11] [L13] __uint32_t w; [L15] int exponent_less_127; VAL [\old(x)=11, x=11] [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=11, exponent_less_127=128, w=9, x=11] [L25] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=11, exponent_less_127=128, w=9, x=11] [L41] COND TRUE exponent_less_127 == 128 [L43] return x + x; VAL [\old(x)=11, exponent_less_127=128, w=9, x=11] [L76] RET, EXPR round_float(x) VAL [round_float(x)=7, x=11] [L76] float res = round_float(x); [L79] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [res=7, res == -0.0f && __signbit_float(res) == 1=0, x=11] [L79] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L80] __VERIFIER_error() VAL [res=7, x=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. UNSAFE Result, 0.2s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 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=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-02 12:17:26,940 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 12:17:26,941 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 12:17:26,949 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 12:17:26,949 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 12:17:26,949 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 12:17:26,950 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 12:17:26,951 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 12:17:26,952 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 12:17:26,952 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 12:17:26,952 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 12:17:26,952 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 12:17:26,953 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 12:17:26,953 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 12:17:26,954 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 12:17:26,954 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 12:17:26,955 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 12:17:26,956 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 12:17:26,957 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 12:17:26,958 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 12:17:26,958 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 12:17:26,959 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 12:17:26,961 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 12:17:26,961 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 12:17:26,961 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 12:17:26,962 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 12:17:26,962 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 12:17:26,963 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 12:17:26,963 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 12:17:26,963 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 12:17:26,964 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 12:17:26,964 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 12:17:26,964 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 12:17:26,964 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 12:17:26,965 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 12:17:26,965 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 12:17:26,965 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-02 12:17:26,974 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 12:17:26,975 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 12:17:26,975 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 12:17:26,975 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 12:17:26,976 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 12:17:26,976 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 12:17:26,976 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 12:17:26,976 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 12:17:26,976 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 12:17:26,976 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 12:17:26,977 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 12:17:26,977 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 12:17:26,977 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 12:17:26,977 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 12:17:26,978 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 12:17:26,978 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 12:17:26,978 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 12:17:26,978 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-02 12:17:26,978 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-02 12:17:26,978 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 12:17:26,979 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 12:17:26,979 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 12:17:26,979 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 12:17:26,979 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 12:17:26,979 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 12:17:26,979 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 12:17:26,980 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 12:17:26,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 12:17:26,980 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 12:17:26,980 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 12:17:26,980 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 12:17:26,980 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-02 12:17:26,980 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 12:17:26,981 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-02 12:17:26,981 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-02 12:17:26,981 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7fdec7243d1dcfe44b7db1591097bb1f5b9c1d53 [2018-12-02 12:17:27,004 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 12:17:27,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 12:17:27,013 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 12:17:27,014 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 12:17:27,015 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 12:17:27,015 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_1032b_true-unreach-call.c [2018-12-02 12:17:27,049 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/data/55efdff20/cd8b8aecfb60459899ad7585078c1c26/FLAG81759f0da [2018-12-02 12:17:27,380 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 12:17:27,381 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/sv-benchmarks/c/float-newlib/float_req_bl_1032b_true-unreach-call.c [2018-12-02 12:17:27,386 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/data/55efdff20/cd8b8aecfb60459899ad7585078c1c26/FLAG81759f0da [2018-12-02 12:17:27,788 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/data/55efdff20/cd8b8aecfb60459899ad7585078c1c26 [2018-12-02 12:17:27,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 12:17:27,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 12:17:27,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 12:17:27,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 12:17:27,794 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 12:17:27,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1e8136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27, skipping insertion in model container [2018-12-02 12:17:27,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 12:17:27,811 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 12:17:27,904 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 12:17:27,907 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 12:17:27,923 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 12:17:27,937 INFO L195 MainTranslator]: Completed translation [2018-12-02 12:17:27,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27 WrapperNode [2018-12-02 12:17:27,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 12:17:27,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 12:17:27,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 12:17:27,938 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 12:17:27,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 12:17:27,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 12:17:27,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 12:17:27,954 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 12:17:27,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (1/1) ... [2018-12-02 12:17:27,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 12:17:27,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 12:17:27,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 12:17:27,974 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 12:17:27,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 12:17:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 12:17:28,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 12:17:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2018-12-02 12:17:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 12:17:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 12:17:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 12:17:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-12-02 12:17:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2018-12-02 12:17:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2018-12-02 12:17:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 12:17:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 12:17:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2018-12-02 12:17:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2018-12-02 12:17:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2018-12-02 12:17:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-02 12:17:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 12:17:28,144 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 12:17:28,208 WARN L317 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 12:17:28,210 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 12:17:28,210 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-02 12:17:28,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:17:28 BoogieIcfgContainer [2018-12-02 12:17:28,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 12:17:28,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 12:17:28,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 12:17:28,213 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 12:17:28,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:17:27" (1/3) ... [2018-12-02 12:17:28,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc0725e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:17:28, skipping insertion in model container [2018-12-02 12:17:28,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:17:27" (2/3) ... [2018-12-02 12:17:28,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc0725e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:17:28, skipping insertion in model container [2018-12-02 12:17:28,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:17:28" (3/3) ... [2018-12-02 12:17:28,215 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032b_true-unreach-call.c [2018-12-02 12:17:28,221 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 12:17:28,226 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 12:17:28,235 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 12:17:28,251 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 12:17:28,252 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 12:17:28,252 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 12:17:28,252 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 12:17:28,252 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 12:17:28,252 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 12:17:28,252 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 12:17:28,252 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 12:17:28,252 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 12:17:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2018-12-02 12:17:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-02 12:17:28,265 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 12:17:28,265 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:17:28,267 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 12:17:28,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:17:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash 564888569, now seen corresponding path program 1 times [2018-12-02 12:17:28,272 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-02 12:17:28,272 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-12-02 12:17:28,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:17:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:17:28,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:17:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 12:17:28,336 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 12:17:28,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 12:17:28,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 12:17:28,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 12:17:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 12:17:28,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 12:17:28,359 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2018-12-02 12:17:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:17:28,371 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2018-12-02 12:17:28,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 12:17:28,372 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-12-02 12:17:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 12:17:28,377 INFO L225 Difference]: With dead ends: 68 [2018-12-02 12:17:28,378 INFO L226 Difference]: Without dead ends: 34 [2018-12-02 12:17:28,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 12:17:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-02 12:17:28,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-12-02 12:17:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-02 12:17:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2018-12-02 12:17:28,402 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2018-12-02 12:17:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 12:17:28,402 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2018-12-02 12:17:28,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 12:17:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2018-12-02 12:17:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 12:17:28,403 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 12:17:28,403 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:17:28,403 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 12:17:28,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:17:28,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1333163618, now seen corresponding path program 1 times [2018-12-02 12:17:28,404 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-02 12:17:28,404 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/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 [2018-12-02 12:17:28,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:17:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:17:28,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:17:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 12:17:28,538 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 12:17:28,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 12:17:28,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-02 12:17:28,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 12:17:28,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 12:17:28,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 12:17:28,547 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2018-12-02 12:17:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:17:28,864 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2018-12-02 12:17:28,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 12:17:28,864 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-12-02 12:17:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 12:17:28,866 INFO L225 Difference]: With dead ends: 51 [2018-12-02 12:17:28,866 INFO L226 Difference]: Without dead ends: 35 [2018-12-02 12:17:28,867 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-12-02 12:17:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-02 12:17:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-12-02 12:17:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-02 12:17:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2018-12-02 12:17:28,870 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2018-12-02 12:17:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 12:17:28,870 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2018-12-02 12:17:28,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 12:17:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2018-12-02 12:17:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-02 12:17:28,871 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 12:17:28,871 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:17:28,871 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 12:17:28,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:17:28,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1215677854, now seen corresponding path program 1 times [2018-12-02 12:17:28,872 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-02 12:17:28,872 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/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 [2018-12-02 12:17:28,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:17:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:17:28,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:17:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 12:17:28,960 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 12:17:28,966 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 12:17:28,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-02 12:17:28,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 12:17:28,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 12:17:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 12:17:28,967 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2018-12-02 12:17:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:17:29,268 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2018-12-02 12:17:29,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 12:17:29,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-12-02 12:17:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 12:17:29,270 INFO L225 Difference]: With dead ends: 53 [2018-12-02 12:17:29,270 INFO L226 Difference]: Without dead ends: 32 [2018-12-02 12:17:29,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-12-02 12:17:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-02 12:17:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-02 12:17:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-02 12:17:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-12-02 12:17:29,273 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 20 [2018-12-02 12:17:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 12:17:29,273 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-12-02 12:17:29,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 12:17:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-12-02 12:17:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-02 12:17:29,274 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 12:17:29,274 INFO L402 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, 1] [2018-12-02 12:17:29,274 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 12:17:29,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:17:29,274 INFO L82 PathProgramCache]: Analyzing trace with hash 734742422, now seen corresponding path program 1 times [2018-12-02 12:17:29,275 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-02 12:17:29,275 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/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 [2018-12-02 12:17:29,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:17:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:17:29,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:17:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 12:17:29,359 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 12:17:29,366 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 12:17:29,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-02 12:17:29,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 12:17:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 12:17:29,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 12:17:29,367 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 7 states. [2018-12-02 12:17:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:17:29,560 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2018-12-02 12:17:29,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 12:17:29,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-12-02 12:17:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 12:17:29,561 INFO L225 Difference]: With dead ends: 50 [2018-12-02 12:17:29,561 INFO L226 Difference]: Without dead ends: 32 [2018-12-02 12:17:29,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-12-02 12:17:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-02 12:17:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-02 12:17:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-02 12:17:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-12-02 12:17:29,564 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 23 [2018-12-02 12:17:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 12:17:29,564 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-12-02 12:17:29,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 12:17:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-12-02 12:17:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-02 12:17:29,565 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 12:17:29,565 INFO L402 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, 1] [2018-12-02 12:17:29,565 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 12:17:29,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:17:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash 341715412, now seen corresponding path program 1 times [2018-12-02 12:17:29,565 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-02 12:17:29,565 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/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 [2018-12-02 12:17:29,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:17:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:17:29,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:17:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 12:17:29,647 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 12:17:29,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 12:17:29,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-02 12:17:29,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 12:17:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 12:17:29,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 12:17:29,654 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 7 states. [2018-12-02 12:17:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:17:29,733 INFO L93 Difference]: Finished difference Result 35 states and 34 transitions. [2018-12-02 12:17:29,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 12:17:29,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-12-02 12:17:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 12:17:29,734 INFO L225 Difference]: With dead ends: 35 [2018-12-02 12:17:29,734 INFO L226 Difference]: Without dead ends: 32 [2018-12-02 12:17:29,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-12-02 12:17:29,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-02 12:17:29,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-02 12:17:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-02 12:17:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 31 transitions. [2018-12-02 12:17:29,738 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 31 transitions. Word has length 23 [2018-12-02 12:17:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 12:17:29,738 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 31 transitions. [2018-12-02 12:17:29,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 12:17:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 31 transitions. [2018-12-02 12:17:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-02 12:17:29,739 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 12:17:29,739 INFO L402 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 12:17:29,739 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 12:17:29,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 12:17:29,739 INFO L82 PathProgramCache]: Analyzing trace with hash 841303647, now seen corresponding path program 1 times [2018-12-02 12:17:29,740 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-02 12:17:29,740 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-12-02 12:17:29,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 12:17:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 12:17:29,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 12:17:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 12:17:30,061 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 12:17:30,068 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 12:17:30,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-12-02 12:17:30,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 12:17:30,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 12:17:30,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-12-02 12:17:30,069 INFO L87 Difference]: Start difference. First operand 32 states and 31 transitions. Second operand 15 states. [2018-12-02 12:17:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 12:17:30,701 INFO L93 Difference]: Finished difference Result 32 states and 31 transitions. [2018-12-02 12:17:30,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 12:17:30,702 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2018-12-02 12:17:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 12:17:30,702 INFO L225 Difference]: With dead ends: 32 [2018-12-02 12:17:30,702 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 12:17:30,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2018-12-02 12:17:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 12:17:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 12:17:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 12:17:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 12:17:30,703 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2018-12-02 12:17:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 12:17:30,703 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 12:17:30,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 12:17:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 12:17:30,703 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 12:17:30,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-02 12:17:30,752 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-12-02 12:17:30,752 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-12-02 12:17:30,753 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-02 12:17:30,753 INFO L451 ceAbstractionStarter]: At program point round_floatENTRY(lines 12 53) the Hoare annotation is: true [2018-12-02 12:17:30,753 INFO L448 ceAbstractionStarter]: For program point L33(lines 33 35) no Hoare annotation was computed. [2018-12-02 12:17:30,753 INFO L448 ceAbstractionStarter]: For program point L25(lines 25 46) no Hoare annotation was computed. [2018-12-02 12:17:30,753 INFO L448 ceAbstractionStarter]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2018-12-02 12:17:30,753 INFO L444 ceAbstractionStarter]: At program point L17-2(lines 17 21) the Hoare annotation is: (= round_float_~x |round_float_#in~x|) [2018-12-02 12:17:30,753 INFO L448 ceAbstractionStarter]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2018-12-02 12:17:30,753 INFO L448 ceAbstractionStarter]: For program point round_floatFINAL(lines 12 53) no Hoare annotation was computed. [2018-12-02 12:17:30,753 INFO L448 ceAbstractionStarter]: For program point round_floatEXIT(lines 12 53) no Hoare annotation was computed. [2018-12-02 12:17:30,753 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 30) no Hoare annotation was computed. [2018-12-02 12:17:30,753 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 39) no Hoare annotation was computed. [2018-12-02 12:17:30,754 INFO L448 ceAbstractionStarter]: For program point L47(lines 47 51) no Hoare annotation was computed. [2018-12-02 12:17:30,754 INFO L448 ceAbstractionStarter]: For program point L47-1(lines 12 53) no Hoare annotation was computed. [2018-12-02 12:17:30,754 INFO L448 ceAbstractionStarter]: For program point L47-2(lines 47 51) no Hoare annotation was computed. [2018-12-02 12:17:30,754 INFO L448 ceAbstractionStarter]: For program point L41(lines 41 45) no Hoare annotation was computed. [2018-12-02 12:17:30,754 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-02 12:17:30,754 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-02 12:17:30,754 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-02 12:17:30,754 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-02 12:17:30,754 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 67 85) the Hoare annotation is: true [2018-12-02 12:17:30,754 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 80) no Hoare annotation was computed. [2018-12-02 12:17:30,755 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 67 85) no Hoare annotation was computed. [2018-12-02 12:17:30,755 INFO L448 ceAbstractionStarter]: For program point L80(line 80) no Hoare annotation was computed. [2018-12-02 12:17:30,755 INFO L448 ceAbstractionStarter]: For program point L79(line 79) no Hoare annotation was computed. [2018-12-02 12:17:30,755 INFO L444 ceAbstractionStarter]: At program point L79-1(line 79) the Hoare annotation is: (and |main_#t~short8| (exists ((v_round_float_~w~0_14 (_ BitVec 32))) (and (= (fp ((_ extract 31 31) v_round_float_~w~0_14) ((_ extract 30 23) v_round_float_~w~0_14) ((_ extract 22 0) v_round_float_~w~0_14)) (fp.neg (_ +zero 8 24))) (= main_~res~0 (let ((.cse0 (bvand (_ bv2147483648 32) v_round_float_~w~0_14))) (fp ((_ extract 31 31) .cse0) ((_ extract 30 23) .cse0) ((_ extract 22 0) .cse0)))))) (= main_~x~0 (fp.neg (_ +zero 8 24)))) [2018-12-02 12:17:30,755 INFO L448 ceAbstractionStarter]: For program point L79-2(line 79) no Hoare annotation was computed. [2018-12-02 12:17:30,755 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 67 85) no Hoare annotation was computed. [2018-12-02 12:17:30,755 INFO L444 ceAbstractionStarter]: At program point L76(line 76) the Hoare annotation is: (= main_~x~0 (fp.neg (_ +zero 8 24))) [2018-12-02 12:17:30,755 INFO L448 ceAbstractionStarter]: For program point L76-1(line 76) no Hoare annotation was computed. [2018-12-02 12:17:30,755 INFO L448 ceAbstractionStarter]: For program point L79-4(lines 79 82) no Hoare annotation was computed. [2018-12-02 12:17:30,756 INFO L448 ceAbstractionStarter]: For program point L58-1(lines 58 62) no Hoare annotation was computed. [2018-12-02 12:17:30,756 INFO L444 ceAbstractionStarter]: At program point L58-2(lines 58 62) the Hoare annotation is: (= |__signbit_float_#in~x| __signbit_float_~x) [2018-12-02 12:17:30,756 INFO L448 ceAbstractionStarter]: For program point __signbit_floatFINAL(lines 55 65) no Hoare annotation was computed. [2018-12-02 12:17:30,756 INFO L448 ceAbstractionStarter]: For program point L58-3(lines 58 62) no Hoare annotation was computed. [2018-12-02 12:17:30,756 INFO L451 ceAbstractionStarter]: At program point __signbit_floatENTRY(lines 55 65) the Hoare annotation is: true [2018-12-02 12:17:30,756 INFO L448 ceAbstractionStarter]: For program point __signbit_floatEXIT(lines 55 65) no Hoare annotation was computed. [2018-12-02 12:17:30,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:17:30 BoogieIcfgContainer [2018-12-02 12:17:30,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 12:17:30,765 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 12:17:30,765 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 12:17:30,765 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 12:17:30,765 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:17:28" (3/4) ... [2018-12-02 12:17:30,768 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 12:17:30,772 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 12:17:30,772 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure round_float [2018-12-02 12:17:30,772 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 12:17:30,772 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __signbit_float [2018-12-02 12:17:30,775 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2018-12-02 12:17:30,775 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-02 12:17:30,775 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 12:17:30,792 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: x == \old(x) [2018-12-02 12:17:30,792 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \old(x) == x [2018-12-02 12:17:30,804 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_81d1ee58-b49f-41b7-a098-2a234e0807d0/bin-2019/utaipan/witness.graphml [2018-12-02 12:17:30,804 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 12:17:30,805 INFO L168 Benchmark]: Toolchain (without parser) took 3014.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 943.4 MB in the beginning and 829.2 MB in the end (delta: 114.2 MB). Peak memory consumption was 229.0 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:30,806 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 12:17:30,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.08 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:30,806 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.10 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:30,807 INFO L168 Benchmark]: Boogie Preprocessor took 20.22 ms. Allocated memory is still 1.0 GB. Free memory is still 927.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 12:17:30,807 INFO L168 Benchmark]: RCFGBuilder took 236.95 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -155.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:30,807 INFO L168 Benchmark]: TraceAbstraction took 2553.16 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 829.2 MB in the end (delta: 254.0 MB). Peak memory consumption was 254.0 MB. Max. memory is 11.5 GB. [2018-12-02 12:17:30,807 INFO L168 Benchmark]: Witness Printer took 39.61 ms. Allocated memory is still 1.1 GB. Free memory is still 829.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 12:17:30,809 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 146.08 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 932.6 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 15.10 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.22 ms. Allocated memory is still 1.0 GB. Free memory is still 927.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 236.95 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -155.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2553.16 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 829.2 MB in the end (delta: 254.0 MB). Peak memory consumption was 254.0 MB. Max. memory is 11.5 GB. * Witness Printer took 39.61 ms. Allocated memory is still 1.1 GB. Free memory is still 829.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 80]: 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: 58]: Loop Invariant Derived loop invariant: \old(x) == x - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: x == \old(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. SAFE Result, 2.5s OverallTime, 6 OverallIterations, 1 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 168 SDtfs, 124 SDslu, 630 SDs, 0 SdLazy, 310 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 18 PreInvPairs, 21 NumberOfFragments, 49 HoareAnnotationTreeSize, 18 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 128 ConstructedInterpolants, 35 QuantifiedInterpolants, 22889 SizeOfPredicates, 23 NumberOfNonLiveVariables, 349 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...