./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_0930.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_0930.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68ec6db07696364982a927374298598825d0f6ca ............................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_0930.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68ec6db07696364982a927374298598825d0f6ca ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:41:23,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:41:23,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:41:23,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:41:23,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:41:23,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:41:23,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:41:23,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:41:23,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:41:23,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:41:23,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:41:23,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:41:23,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:41:23,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:41:23,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:41:23,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:41:23,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:41:23,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:41:23,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:41:23,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:41:23,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:41:23,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:41:23,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:41:23,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:41:23,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:41:23,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:41:23,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:41:23,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:41:23,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:41:23,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:41:23,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:41:23,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:41:23,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:41:23,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:41:23,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:41:23,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:41:23,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:41:23,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:41:23,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:41:23,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:41:23,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:41:23,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 01:41:23,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:41:23,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:41:23,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:41:23,677 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:41:23,678 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:41:23,678 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:41:23,678 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:41:23,679 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:41:23,679 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:41:23,679 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:41:23,679 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:41:23,680 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:41:23,680 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:41:23,680 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:41:23,681 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:41:23,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:41:23,682 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:41:23,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:41:23,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:41:23,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:41:23,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:41:23,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:41:23,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:41:23,684 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:41:23,685 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:41:23,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:41:23,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:41:23,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:41:23,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:41:23,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:41:23,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:41:23,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:41:23,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:41:23,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:41:23,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:41:23,688 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:41:23,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:41:23,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:41:23,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:41:23,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:41:23,690 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68ec6db07696364982a927374298598825d0f6ca [2020-11-30 01:41:23,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:41:23,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:41:23,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:41:23,992 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:41:23,993 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:41:23,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_0930.c [2020-11-30 01:41:24,081 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/data/3f401e6d2/71119f85ddc0405681e20e1bc3c4b36b/FLAGc2515e451 [2020-11-30 01:41:24,684 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:41:24,685 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/sv-benchmarks/c/float-newlib/float_req_bl_0930.c [2020-11-30 01:41:24,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/data/3f401e6d2/71119f85ddc0405681e20e1bc3c4b36b/FLAGc2515e451 [2020-11-30 01:41:25,011 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/data/3f401e6d2/71119f85ddc0405681e20e1bc3c4b36b [2020-11-30 01:41:25,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:41:25,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:41:25,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:41:25,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:41:25,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:41:25,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e49e872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25, skipping insertion in model container [2020-11-30 01:41:25,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:41:25,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:41:25,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:41:25,328 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:41:25,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:41:25,398 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:41:25,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25 WrapperNode [2020-11-30 01:41:25,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:41:25,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:41:25,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:41:25,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:41:25,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:41:25,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:41:25,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:41:25,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:41:25,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (1/1) ... [2020-11-30 01:41:25,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:41:25,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:41:25,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:41:25,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:41:25,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:41:25,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:41:25,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:41:25,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-30 01:41:25,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:41:25,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-30 01:41:25,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:41:25,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:41:25,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:41:25,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:41:26,464 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:41:26,464 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-30 01:41:26,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:41:26 BoogieIcfgContainer [2020-11-30 01:41:26,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:41:26,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:41:26,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:41:26,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:41:26,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:41:25" (1/3) ... [2020-11-30 01:41:26,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276f0ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:41:26, skipping insertion in model container [2020-11-30 01:41:26,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:25" (2/3) ... [2020-11-30 01:41:26,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276f0ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:41:26, skipping insertion in model container [2020-11-30 01:41:26,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:41:26" (3/3) ... [2020-11-30 01:41:26,484 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0930.c [2020-11-30 01:41:26,499 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:41:26,505 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:41:26,519 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:41:26,560 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:41:26,561 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:41:26,561 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:41:26,561 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:41:26,561 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:41:26,561 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:41:26,562 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:41:26,562 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:41:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-30 01:41:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:41:26,586 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:41:26,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:41:26,588 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:41:26,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:41:26,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1454827617, now seen corresponding path program 1 times [2020-11-30 01:41:26,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:41:26,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921151771] [2020-11-30 01:41:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:41:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:41:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:41:26,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921151771] [2020-11-30 01:41:26,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:41:26,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:41:26,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080914746] [2020-11-30 01:41:26,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:41:26,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:41:26,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:41:26,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:41:26,822 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-11-30 01:41:26,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:41:26,843 INFO L93 Difference]: Finished difference Result 47 states and 73 transitions. [2020-11-30 01:41:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:41:26,845 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-30 01:41:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:41:26,870 INFO L225 Difference]: With dead ends: 47 [2020-11-30 01:41:26,872 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 01:41:26,875 INFO L677 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 [2020-11-30 01:41:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 01:41:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-30 01:41:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 01:41:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-30 01:41:26,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 8 [2020-11-30 01:41:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:41:26,924 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-30 01:41:26,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:41:26,924 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-30 01:41:26,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:41:26,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:41:26,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:41:26,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:41:26,927 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:41:26,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:41:26,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1763597920, now seen corresponding path program 1 times [2020-11-30 01:41:26,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:41:26,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794143763] [2020-11-30 01:41:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:41:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:41:27,019 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:41:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:41:27,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:41:27,122 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 01:41:27,122 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:41:27,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:41:27,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:41:27 BoogieIcfgContainer [2020-11-30 01:41:27,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:41:27,189 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:41:27,189 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:41:27,190 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:41:27,191 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:41:26" (3/4) ... [2020-11-30 01:41:27,194 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 01:41:27,195 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:41:27,200 INFO L168 Benchmark]: Toolchain (without parser) took 2179.09 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 65.1 MB in the beginning and 36.7 MB in the end (delta: 28.4 MB). Peak memory consumption was 51.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:41:27,201 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 55.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:41:27,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.59 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 64.8 MB in the beginning and 98.0 MB in the end (delta: -33.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:41:27,204 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.31 ms. Allocated memory is still 123.7 MB. Free memory was 98.0 MB in the beginning and 95.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:41:27,205 INFO L168 Benchmark]: Boogie Preprocessor took 41.58 ms. Allocated memory is still 123.7 MB. Free memory was 95.9 MB in the beginning and 94.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:41:27,206 INFO L168 Benchmark]: RCFGBuilder took 974.62 ms. Allocated memory is still 123.7 MB. Free memory was 94.3 MB in the beginning and 60.3 MB in the end (delta: 34.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:41:27,207 INFO L168 Benchmark]: TraceAbstraction took 715.62 ms. Allocated memory is still 123.7 MB. Free memory was 59.8 MB in the beginning and 37.2 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:41:27,208 INFO L168 Benchmark]: Witness Printer took 6.57 ms. Allocated memory is still 123.7 MB. Free memory was 37.2 MB in the beginning and 36.7 MB in the end (delta: 499.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:41:27,222 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 55.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 379.59 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 64.8 MB in the beginning and 98.0 MB in the end (delta: -33.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.31 ms. Allocated memory is still 123.7 MB. Free memory was 98.0 MB in the beginning and 95.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.58 ms. Allocated memory is still 123.7 MB. Free memory was 95.9 MB in the beginning and 94.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 974.62 ms. Allocated memory is still 123.7 MB. Free memory was 94.3 MB in the beginning and 60.3 MB in the end (delta: 34.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 715.62 ms. Allocated memory is still 123.7 MB. Free memory was 59.8 MB in the beginning and 37.2 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 6.57 ms. Allocated memory is still 123.7 MB. Free memory was 37.2 MB in the beginning and 36.7 MB in the end (delta: 499.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 122, overapproximation of someBinaryArithmeticFLOAToperation at line 34, overapproximation of bitwiseAnd at line 33. Possible FailurePath: [L14-L18] static const float ln2_hi_log = 6.9313812256e-01, ln2_lo_log = 9.0580006145e-06, two25_log = 3.355443200e+07, Lg1_log = 6.6666668653e-01, Lg2_log = 4.0000000596e-01, Lg3_log = 2.8571429849e-01, Lg4_log = 2.2222198546e-01, Lg5_log = 1.8183572590e-01, Lg6_log = 1.5313838422e-01, Lg7_log = 1.4798198640e-01; [L20] static const float zero_log = 0.0; [L118] float x = 1.0f; [L23] float hfsq, f, s, z, R, w, t1, t2, dk; [L24] __int32_t k, ix, i, j; VAL [Lg1_log=66666668653/100000000000, Lg2_log=10000000149/25000000000, Lg3_log=28571429849/100000000000, Lg4_log=11111099273/50000000000, Lg5_log=1818357259/10000000000, Lg6_log=7656919211/50000000000, Lg7_log=184977483/1250000000, ln2_hi_log=2166056633/3125000000, ln2_lo_log=18116001229/2000000000000000, two25_log=33554432, zero_log=0] [L27] ieee_float_shape_type gf_u; [L28] gf_u.value = (x) [L29] EXPR gf_u.word [L29] (ix) = gf_u.word [L32] k = 0 VAL [Lg1_log=66666668653/100000000000, Lg2_log=10000000149/25000000000, Lg3_log=28571429849/100000000000, Lg4_log=11111099273/50000000000, Lg5_log=1818357259/10000000000, Lg6_log=7656919211/50000000000, Lg7_log=184977483/1250000000, ln2_hi_log=2166056633/3125000000, ln2_lo_log=18116001229/2000000000000000, two25_log=33554432, zero_log=0] [L33] COND TRUE ((ix & 0x7fffffff) == 0) [L34] return -two25_log / zero_log; VAL [Lg1_log=66666668653/100000000000, Lg2_log=10000000149/25000000000, Lg3_log=28571429849/100000000000, Lg4_log=11111099273/50000000000, Lg5_log=1818357259/10000000000, Lg6_log=7656919211/50000000000, Lg7_log=184977483/1250000000, ln2_hi_log=2166056633/3125000000, ln2_lo_log=18116001229/2000000000000000, two25_log=33554432, zero_log=0] [L119] float res = __ieee754_logf(x); [L122] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [Lg1_log=66666668653/100000000000, Lg2_log=10000000149/25000000000, Lg3_log=28571429849/100000000000, Lg4_log=11111099273/50000000000, Lg5_log=1818357259/10000000000, Lg6_log=7656919211/50000000000, Lg7_log=184977483/1250000000, ln2_hi_log=2166056633/3125000000, ln2_lo_log=18116001229/2000000000000000, two25_log=33554432, zero_log=0] [L122] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L3] __assert_fail("0", "float_req_bl_0930.c", 3, "reach_error") VAL [Lg1_log=66666668653/100000000000, Lg2_log=10000000149/25000000000, Lg3_log=28571429849/100000000000, Lg4_log=11111099273/50000000000, Lg5_log=1818357259/10000000000, Lg6_log=7656919211/50000000000, Lg7_log=184977483/1250000000, ln2_hi_log=2166056633/3125000000, ln2_lo_log=18116001229/2000000000000000, two25_log=33554432, zero_log=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 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=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:41:29,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:41:29,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:41:29,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:41:29,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:41:29,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:41:29,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:41:30,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:41:30,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:41:30,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:41:30,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:41:30,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:41:30,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:41:30,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:41:30,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:41:30,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:41:30,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:41:30,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:41:30,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:41:30,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:41:30,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:41:30,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:41:30,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:41:30,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:41:30,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:41:30,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:41:30,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:41:30,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:41:30,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:41:30,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:41:30,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:41:30,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:41:30,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:41:30,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:41:30,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:41:30,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:41:30,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:41:30,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:41:30,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:41:30,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:41:30,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:41:30,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-30 01:41:30,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:41:30,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:41:30,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:41:30,115 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:41:30,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:41:30,116 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:41:30,116 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:41:30,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:41:30,116 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:41:30,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:41:30,119 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:41:30,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:41:30,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:41:30,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:41:30,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:41:30,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:41:30,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:41:30,121 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 01:41:30,122 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 01:41:30,122 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:41:30,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:41:30,122 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:41:30,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:41:30,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:41:30,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:41:30,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:41:30,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:41:30,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:41:30,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:41:30,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:41:30,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:41:30,125 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 01:41:30,125 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 01:41:30,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:41:30,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:41:30,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:41:30,145 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68ec6db07696364982a927374298598825d0f6ca [2020-11-30 01:41:30,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:41:30,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:41:30,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:41:30,638 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:41:30,639 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:41:30,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/../../sv-benchmarks/c/float-newlib/float_req_bl_0930.c [2020-11-30 01:41:30,712 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/data/bbd36d82f/9b44b2a9184c4abda09432405792e882/FLAG701751171 [2020-11-30 01:41:31,309 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:41:31,318 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/sv-benchmarks/c/float-newlib/float_req_bl_0930.c [2020-11-30 01:41:31,327 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/data/bbd36d82f/9b44b2a9184c4abda09432405792e882/FLAG701751171 [2020-11-30 01:41:31,621 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/data/bbd36d82f/9b44b2a9184c4abda09432405792e882 [2020-11-30 01:41:31,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:41:31,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:41:31,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:41:31,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:41:31,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:41:31,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:41:31" (1/1) ... [2020-11-30 01:41:31,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea5fb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:31, skipping insertion in model container [2020-11-30 01:41:31,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:41:31" (1/1) ... [2020-11-30 01:41:31,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:41:31,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:41:31,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:41:31,913 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:41:32,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:41:32,034 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:41:32,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32 WrapperNode [2020-11-30 01:41:32,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:41:32,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:41:32,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:41:32,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:41:32,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (1/1) ... [2020-11-30 01:41:32,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (1/1) ... [2020-11-30 01:41:32,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:41:32,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:41:32,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:41:32,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:41:32,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (1/1) ... [2020-11-30 01:41:32,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (1/1) ... [2020-11-30 01:41:32,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (1/1) ... [2020-11-30 01:41:32,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (1/1) ... [2020-11-30 01:41:32,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (1/1) ... [2020-11-30 01:41:32,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (1/1) ... [2020-11-30 01:41:32,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (1/1) ... [2020-11-30 01:41:32,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:41:32,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:41:32,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:41:32,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:41:32,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:41:32,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 01:41:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:41:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2020-11-30 01:41:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-30 01:41:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:41:32,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:41:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-11-30 01:41:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-30 01:41:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:41:47,059 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:41:47,059 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-30 01:41:47,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:41:47 BoogieIcfgContainer [2020-11-30 01:41:47,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:41:47,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:41:47,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:41:47,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:41:47,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:41:31" (1/3) ... [2020-11-30 01:41:47,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6def415a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:41:47, skipping insertion in model container [2020-11-30 01:41:47,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:41:32" (2/3) ... [2020-11-30 01:41:47,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6def415a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:41:47, skipping insertion in model container [2020-11-30 01:41:47,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:41:47" (3/3) ... [2020-11-30 01:41:47,070 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0930.c [2020-11-30 01:41:47,084 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:41:47,089 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:41:47,102 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:41:47,145 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:41:47,147 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:41:47,147 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:41:47,147 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:41:47,148 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:41:47,148 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:41:47,148 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:41:47,148 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:41:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-11-30 01:41:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:41:47,173 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:41:47,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:41:47,174 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:41:47,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:41:47,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1904085918, now seen corresponding path program 1 times [2020-11-30 01:41:47,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:41:47,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601009375] [2020-11-30 01:41:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 01:41:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:41:47,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 01:41:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:41:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:41:47,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:41:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:41:47,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601009375] [2020-11-30 01:41:47,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:41:47,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 01:41:47,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066065355] [2020-11-30 01:41:47,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:41:47,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:41:47,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:41:47,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:41:47,976 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-11-30 01:41:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:41:47,996 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2020-11-30 01:41:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:41:48,001 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-30 01:41:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:41:48,013 INFO L225 Difference]: With dead ends: 67 [2020-11-30 01:41:48,015 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 01:41:48,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:41:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 01:41:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-30 01:41:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 01:41:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-30 01:41:48,073 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 9 [2020-11-30 01:41:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:41:48,073 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-30 01:41:48,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:41:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-30 01:41:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:41:48,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:41:48,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:41:48,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 01:41:48,286 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:41:48,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:41:48,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1484264895, now seen corresponding path program 1 times [2020-11-30 01:41:48,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:41:48,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894887964] [2020-11-30 01:41:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 01:41:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:41:48,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 01:41:48,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:41:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:41:49,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:41:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:41:49,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894887964] [2020-11-30 01:41:49,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:41:49,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 01:41:49,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413709250] [2020-11-30 01:41:49,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:41:49,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:41:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:41:49,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:41:49,135 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 6 states. [2020-11-30 01:41:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:41:52,016 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2020-11-30 01:41:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:41:52,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 01:41:52,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:41:52,185 INFO L225 Difference]: With dead ends: 60 [2020-11-30 01:41:52,186 INFO L226 Difference]: Without dead ends: 38 [2020-11-30 01:41:52,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:41:52,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-30 01:41:52,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-11-30 01:41:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 01:41:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-11-30 01:41:52,194 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 10 [2020-11-30 01:41:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:41:52,195 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-11-30 01:41:52,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:41:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-11-30 01:41:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 01:41:52,196 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:41:52,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:41:52,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 01:41:52,402 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:41:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:41:52,404 INFO L82 PathProgramCache]: Analyzing trace with hash 933425138, now seen corresponding path program 1 times [2020-11-30 01:41:52,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:41:52,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993755154] [2020-11-30 01:41:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-30 01:41:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:41:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:41:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:41:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:41:53,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:41:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:41:53,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993755154] [2020-11-30 01:41:53,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:41:53,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 01:41:53,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346779203] [2020-11-30 01:41:53,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 01:41:53,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:41:53,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 01:41:53,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:41:53,275 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 7 states. [2020-11-30 01:42:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:05,336 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-11-30 01:42:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:42:05,337 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-11-30 01:42:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:05,338 INFO L225 Difference]: With dead ends: 41 [2020-11-30 01:42:05,338 INFO L226 Difference]: Without dead ends: 38 [2020-11-30 01:42:05,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:42:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-30 01:42:05,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-11-30 01:42:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 01:42:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-11-30 01:42:05,353 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2020-11-30 01:42:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:05,353 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-11-30 01:42:05,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 01:42:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-11-30 01:42:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 01:42:05,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:05,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:42:05,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 01:42:05,558 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:42:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:05,559 INFO L82 PathProgramCache]: Analyzing trace with hash 935272180, now seen corresponding path program 1 times [2020-11-30 01:42:05,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:42:05,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883550557] [2020-11-30 01:42:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-30 01:42:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:06,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:42:06,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:06,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:06,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883550557] [2020-11-30 01:42:06,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:42:06,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2020-11-30 01:42:06,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288709884] [2020-11-30 01:42:06,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:42:06,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 01:42:06,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:42:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:42:06,892 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 12 states. [2020-11-30 01:42:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:25,277 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-11-30 01:42:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:42:25,307 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-11-30 01:42:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:25,308 INFO L225 Difference]: With dead ends: 58 [2020-11-30 01:42:25,308 INFO L226 Difference]: Without dead ends: 49 [2020-11-30 01:42:25,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:42:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-30 01:42:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-11-30 01:42:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 01:42:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-11-30 01:42:25,316 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-11-30 01:42:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:25,317 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-11-30 01:42:25,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:42:25,317 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-11-30 01:42:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 01:42:25,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:25,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:42:25,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-30 01:42:25,526 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:42:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:25,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1140293842, now seen corresponding path program 1 times [2020-11-30 01:42:25,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 01:42:25,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445330627] [2020-11-30 01:42:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-30 01:42:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:26,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 01:42:26,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:26,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:28,295 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-11-30 01:42:29,251 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-11-30 01:43:01,123 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-11-30 01:43:01,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445330627] [2020-11-30 01:43:01,125 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-11-30 01:43:01,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2106232778] [2020-11-30 01:43:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 01:43:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:43:03,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 01:43:03,521 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@c456fd4 [2020-11-30 01:43:03,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289696758] [2020-11-30 01:43:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fef7004b-42c6-43a4-850f-0d45d6cf2917/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:43:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:43:03,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:43:03,739 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@c456fd4 [2020-11-30 01:43:03,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:43:03,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-11-30 01:43:03,740 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-11-30 01:43:03,740 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:43:04,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:43:04,365 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-30 01:43:04,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:43:04 BoogieIcfgContainer [2020-11-30 01:43:04,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:43:04,366 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:43:04,366 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:43:04,366 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:43:04,367 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:41:47" (3/4) ... [2020-11-30 01:43:04,370 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 01:43:04,370 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:43:04,372 INFO L168 Benchmark]: Toolchain (without parser) took 92743.93 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 52.5 MB in the beginning and 42.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:04,373 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 69.2 MB. Free memory is still 52.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:43:04,373 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.43 ms. Allocated memory is still 69.2 MB. Free memory was 52.3 MB in the beginning and 51.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:04,374 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.06 ms. Allocated memory is still 69.2 MB. Free memory was 51.0 MB in the beginning and 49.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:04,375 INFO L168 Benchmark]: Boogie Preprocessor took 43.04 ms. Allocated memory is still 69.2 MB. Free memory was 49.1 MB in the beginning and 47.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:04,376 INFO L168 Benchmark]: RCFGBuilder took 14922.29 ms. Allocated memory is still 69.2 MB. Free memory was 47.1 MB in the beginning and 46.2 MB in the end (delta: 877.3 kB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:04,376 INFO L168 Benchmark]: TraceAbstraction took 77302.98 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 45.6 MB in the beginning and 43.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2020-11-30 01:43:04,377 INFO L168 Benchmark]: Witness Printer took 4.61 ms. Allocated memory is still 83.9 MB. Free memory was 43.3 MB in the beginning and 42.8 MB in the end (delta: 448.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:43:04,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 69.2 MB. Free memory is still 52.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 405.43 ms. Allocated memory is still 69.2 MB. Free memory was 52.3 MB in the beginning and 51.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.06 ms. Allocated memory is still 69.2 MB. Free memory was 51.0 MB in the beginning and 49.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.04 ms. Allocated memory is still 69.2 MB. Free memory was 49.1 MB in the beginning and 47.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 14922.29 ms. Allocated memory is still 69.2 MB. Free memory was 47.1 MB in the beginning and 46.2 MB in the end (delta: 877.3 kB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 77302.98 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 45.6 MB in the beginning and 43.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.61 ms. Allocated memory is still 83.9 MB. Free memory was 43.3 MB in the beginning and 42.8 MB in the end (delta: 448.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L14-L18] static const float ln2_hi_log = 6.9313812256e-01, ln2_lo_log = 9.0580006145e-06, two25_log = 3.355443200e+07, Lg1_log = 6.6666668653e-01, Lg2_log = 4.0000000596e-01, Lg3_log = 2.8571429849e-01, Lg4_log = 2.2222198546e-01, Lg5_log = 1.8183572590e-01, Lg6_log = 1.5313838422e-01, Lg7_log = 1.4798198640e-01; [L20] static const float zero_log = 0.0; [L118] float x = 1.0f; [L23] float hfsq, f, s, z, R, w, t1, t2, dk; [L24] __int32_t k, ix, i, j; [L27] ieee_float_shape_type gf_u; [L28] gf_u.value = (x) [L29] EXPR gf_u.word [L29] (ix) = gf_u.word [L32] k = 0 [L33] COND FALSE !(((ix & 0x7fffffff) == 0)) [L35] COND FALSE !(ix < 0) [L37] COND FALSE !(!((ix) < 0x7f800000L)) [L39] COND FALSE !(((ix) < 0x00800000L)) [L48] k += (ix >> 23) - 127 [L49] ix &= 0x007fffff [L50] i = (ix + (0x95f64 << 3)) & 0x800000 [L52] ieee_float_shape_type sf_u; [L53] sf_u.word = (ix | (i ^ 0x3f800000)) [L54] EXPR sf_u.value [L54] (x) = sf_u.value [L56] k += (i >> 23) [L57] f = x - (float)1.0 [L58] COND TRUE (0x007fffff & (15 + ix)) < 16 [L59] COND FALSE !(f == zero_log) [L67] R = f * f * ((float)0.5 - (float)0.33333333333333333 * f) [L68] COND TRUE k == 0 [L69] return f - R; [L119] float res = __ieee754_logf(x); [L122] EXPR res == 0.0f && __signbit_float(res) == 0 [L122] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L3] __assert_fail("0", "float_req_bl_0930.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 77.2s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 33.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 169 SDslu, 286 SDs, 0 SdLazy, 93 SolverSat, 15 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 32.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 34 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 110 ConstructedInterpolants, 36 QuantifiedInterpolants, 12586 SizeOfPredicates, 20 NumberOfNonLiveVariables, 249 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...