./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.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_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f8d72d06ca136037e1a4f2d3dda81b71758b03c ................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f8d72d06ca136037e1a4f2d3dda81b71758b03c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:26:33,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:26:33,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:26:33,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:26:33,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:26:33,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:26:33,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:26:33,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:26:33,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:26:33,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:26:33,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:26:33,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:26:33,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:26:33,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:26:33,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:26:33,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:26:33,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:26:33,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:26:33,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:26:33,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:26:33,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:26:33,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:26:33,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:26:33,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:26:33,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:26:33,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:26:33,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:26:33,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:26:33,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:26:33,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:26:33,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:26:33,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:26:33,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:26:33,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:26:33,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:26:33,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:26:33,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:26:33,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:26:33,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:26:33,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:26:33,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:26:33,369 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 20:26:33,422 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:26:33,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:26:33,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:26:33,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:26:33,425 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:26:33,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:26:33,426 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:26:33,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:26:33,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:26:33,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:26:33,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:26:33,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:26:33,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:26:33,428 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:26:33,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:26:33,429 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:26:33,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:26:33,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:26:33,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:26:33,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:26:33,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:26:33,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:26:33,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:26:33,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:26:33,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:26:33,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:26:33,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:26:33,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:26:33,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:26:33,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2020-11-29 20:26:33,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:26:33,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:26:33,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:26:33,842 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:26:33,844 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:26:33,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-11-29 20:26:33,933 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/data/bfd3f5dbe/c751177100e1495dafdd37e42b017e6b/FLAG4c9f484c7 [2020-11-29 20:26:34,653 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:26:34,656 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-11-29 20:26:34,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/data/bfd3f5dbe/c751177100e1495dafdd37e42b017e6b/FLAG4c9f484c7 [2020-11-29 20:26:34,993 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/data/bfd3f5dbe/c751177100e1495dafdd37e42b017e6b [2020-11-29 20:26:35,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:26:35,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:26:35,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:26:35,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:26:35,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:26:35,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697116e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35, skipping insertion in model container [2020-11-29 20:26:35,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:26:35,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:26:35,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:26:35,401 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:26:35,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:26:35,469 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:26:35,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35 WrapperNode [2020-11-29 20:26:35,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:26:35,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:26:35,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:26:35,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:26:35,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:26:35,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:26:35,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:26:35,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:26:35,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (1/1) ... [2020-11-29 20:26:35,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:26:35,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:26:35,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:26:35,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:26:35,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/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 [2020-11-29 20:26:35,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:26:35,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:26:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-29 20:26:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:26:35,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:26:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 20:26:35,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:26:36,318 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:26:36,319 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-29 20:26:36,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:26:36 BoogieIcfgContainer [2020-11-29 20:26:36,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:26:36,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:26:36,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:26:36,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:26:36,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:26:35" (1/3) ... [2020-11-29 20:26:36,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2752b311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:26:36, skipping insertion in model container [2020-11-29 20:26:36,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:35" (2/3) ... [2020-11-29 20:26:36,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2752b311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:26:36, skipping insertion in model container [2020-11-29 20:26:36,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:26:36" (3/3) ... [2020-11-29 20:26:36,337 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-11-29 20:26:36,352 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:26:36,357 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:26:36,377 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 20:26:36,425 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:26:36,426 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:26:36,426 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:26:36,427 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:26:36,427 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:26:36,427 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:26:36,428 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:26:36,428 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:26:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-29 20:26:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:26:36,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:36,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:36,462 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:36,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:36,470 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-11-29 20:26:36,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:36,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766072460] [2020-11-29 20:26:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:36,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766072460] [2020-11-29 20:26:36,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:36,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:26:36,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538021373] [2020-11-29 20:26:36,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:26:36,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:26:36,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:26:36,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:26:36,722 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-29 20:26:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:36,750 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-11-29 20:26:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:26:36,752 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 20:26:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:36,775 INFO L225 Difference]: With dead ends: 63 [2020-11-29 20:26:36,782 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 20:26:36,785 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 [2020-11-29 20:26:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 20:26:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 20:26:36,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 20:26:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-11-29 20:26:36,839 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-11-29 20:26:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:36,840 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-11-29 20:26:36,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:26:36,841 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-11-29 20:26:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 20:26:36,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:36,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:36,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:26:36,843 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-11-29 20:26:36,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:36,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709583993] [2020-11-29 20:26:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:36,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709583993] [2020-11-29 20:26:36,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:36,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:26:36,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661672330] [2020-11-29 20:26:36,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:26:36,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:26:36,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:26:36,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:26:36,969 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-11-29 20:26:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:37,104 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-11-29 20:26:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:26:37,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 20:26:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:37,108 INFO L225 Difference]: With dead ends: 53 [2020-11-29 20:26:37,109 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 20:26:37,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:26:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 20:26:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-11-29 20:26:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 20:26:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 20:26:37,128 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-11-29 20:26:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:37,129 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 20:26:37,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:26:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 20:26:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 20:26:37,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:37,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:37,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:26:37,135 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:37,136 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-11-29 20:26:37,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:37,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681820225] [2020-11-29 20:26:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:37,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681820225] [2020-11-29 20:26:37,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:37,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:26:37,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466904807] [2020-11-29 20:26:37,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:26:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:26:37,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:26:37,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:26:37,249 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 20:26:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:37,372 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-11-29 20:26:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:26:37,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-29 20:26:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:37,401 INFO L225 Difference]: With dead ends: 55 [2020-11-29 20:26:37,403 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 20:26:37,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:26:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 20:26:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-11-29 20:26:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 20:26:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 20:26:37,421 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-11-29 20:26:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:37,423 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 20:26:37,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:26:37,423 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 20:26:37,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 20:26:37,427 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:37,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:37,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 20:26:37,428 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:37,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:37,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-11-29 20:26:37,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:37,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602679693] [2020-11-29 20:26:37,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:37,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602679693] [2020-11-29 20:26:37,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:37,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:26:37,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901796271] [2020-11-29 20:26:37,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:26:37,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:26:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:26:37,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:26:37,582 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 20:26:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:37,709 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-11-29 20:26:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:26:37,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-29 20:26:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:37,716 INFO L225 Difference]: With dead ends: 57 [2020-11-29 20:26:37,716 INFO L226 Difference]: Without dead ends: 48 [2020-11-29 20:26:37,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:26:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-29 20:26:37,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-11-29 20:26:37,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 20:26:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 20:26:37,726 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-11-29 20:26:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:37,727 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 20:26:37,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:26:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 20:26:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:26:37,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:37,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:37,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 20:26:37,729 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:37,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:37,730 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-11-29 20:26:37,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:37,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738526900] [2020-11-29 20:26:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:37,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738526900] [2020-11-29 20:26:37,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:37,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:26:37,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295119585] [2020-11-29 20:26:37,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:26:37,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:26:37,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:26:37,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:26:37,833 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 20:26:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:37,946 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-11-29 20:26:37,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:26:37,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 20:26:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:37,951 INFO L225 Difference]: With dead ends: 55 [2020-11-29 20:26:37,951 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 20:26:37,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:26:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 20:26:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-11-29 20:26:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 20:26:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 20:26:37,960 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-11-29 20:26:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:37,961 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 20:26:37,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:26:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 20:26:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:26:37,962 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:37,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:37,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 20:26:37,963 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-11-29 20:26:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:37,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945684717] [2020-11-29 20:26:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:26:38,002 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:26:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:26:38,041 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:26:38,071 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:26:38,072 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:26:38,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 20:26:38,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:26:38 BoogieIcfgContainer [2020-11-29 20:26:38,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:26:38,108 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:26:38,109 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:26:38,109 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:26:38,109 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:26:36" (3/4) ... [2020-11-29 20:26:38,113 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 20:26:38,114 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:26:38,116 INFO L168 Benchmark]: Toolchain (without parser) took 3099.88 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 59.3 MB in the beginning and 80.0 MB in the end (delta: -20.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:38,117 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory was 46.3 MB in the beginning and 46.2 MB in the end (delta: 35.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:26:38,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 453.10 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 59.0 MB in the beginning and 107.3 MB in the end (delta: -48.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:38,119 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.51 ms. Allocated memory is still 130.0 MB. Free memory was 107.3 MB in the beginning and 105.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:38,120 INFO L168 Benchmark]: Boogie Preprocessor took 37.62 ms. Allocated memory is still 130.0 MB. Free memory was 105.9 MB in the beginning and 104.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:38,121 INFO L168 Benchmark]: RCFGBuilder took 762.09 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 84.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:38,121 INFO L168 Benchmark]: TraceAbstraction took 1780.71 ms. Allocated memory is still 130.0 MB. Free memory was 84.2 MB in the beginning and 80.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:38,122 INFO L168 Benchmark]: Witness Printer took 5.36 ms. Allocated memory is still 130.0 MB. Free memory was 80.9 MB in the beginning and 80.0 MB in the end (delta: 888.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:26:38,131 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory was 46.3 MB in the beginning and 46.2 MB in the end (delta: 35.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 453.10 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 59.0 MB in the beginning and 107.3 MB in the end (delta: -48.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.51 ms. Allocated memory is still 130.0 MB. Free memory was 107.3 MB in the beginning and 105.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.62 ms. Allocated memory is still 130.0 MB. Free memory was 105.9 MB in the beginning and 104.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 762.09 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 84.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1780.71 ms. Allocated memory is still 130.0 MB. Free memory was 84.2 MB in the beginning and 80.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Witness Printer took 5.36 ms. Allocated memory is still 130.0 MB. Free memory was 80.9 MB in the beginning and 80.0 MB in the end (delta: 888.0 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 80, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L74] float x = -0.0f; [L75] float y = 0.0f; [L22] __uint32_t w; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L3] __assert_fail("0", "float_req_bl_1252a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 [2020-11-29 20:26:41,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:26:41,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:26:41,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:26:41,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:26:41,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:26:41,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:26:41,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:26:41,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:26:41,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:26:41,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:26:41,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:26:41,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:26:41,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:26:41,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:26:41,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:26:41,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:26:41,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:26:41,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:26:41,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:26:41,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:26:41,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:26:41,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:26:41,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:26:41,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:26:41,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:26:41,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:26:41,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:26:41,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:26:41,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:26:41,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:26:41,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:26:41,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:26:41,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:26:41,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:26:41,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:26:41,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:26:41,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:26:41,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:26:41,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:26:41,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:26:41,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 20:26:41,353 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:26:41,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:26:41,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:26:41,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:26:41,356 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:26:41,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:26:41,356 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:26:41,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:26:41,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:26:41,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:26:41,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:26:41,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:26:41,358 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 20:26:41,358 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 20:26:41,358 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:26:41,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:26:41,359 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:26:41,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:26:41,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:26:41,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:26:41,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:26:41,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:26:41,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:26:41,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:26:41,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:26:41,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:26:41,361 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 20:26:41,361 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 20:26:41,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:26:41,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:26:41,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 20:26:41,362 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_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f8d72d06ca136037e1a4f2d3dda81b71758b03c [2020-11-29 20:26:41,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:26:41,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:26:41,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:26:41,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:26:41,892 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:26:41,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-11-29 20:26:41,976 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/data/a3a2f18b9/00de76b73f374e04bc3f9796c03c0a80/FLAG477ddd0aa [2020-11-29 20:26:42,644 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:26:42,644 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2020-11-29 20:26:42,661 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/data/a3a2f18b9/00de76b73f374e04bc3f9796c03c0a80/FLAG477ddd0aa [2020-11-29 20:26:42,992 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/data/a3a2f18b9/00de76b73f374e04bc3f9796c03c0a80 [2020-11-29 20:26:42,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:26:42,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:26:42,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:26:43,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:26:43,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:26:43,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:26:42" (1/1) ... [2020-11-29 20:26:43,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a87abd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43, skipping insertion in model container [2020-11-29 20:26:43,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:26:42" (1/1) ... [2020-11-29 20:26:43,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:26:43,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:26:43,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:26:43,255 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:26:43,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:26:43,316 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:26:43,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43 WrapperNode [2020-11-29 20:26:43,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:26:43,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:26:43,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:26:43,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:26:43,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (1/1) ... [2020-11-29 20:26:43,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (1/1) ... [2020-11-29 20:26:43,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:26:43,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:26:43,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:26:43,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:26:43,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (1/1) ... [2020-11-29 20:26:43,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (1/1) ... [2020-11-29 20:26:43,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (1/1) ... [2020-11-29 20:26:43,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (1/1) ... [2020-11-29 20:26:43,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (1/1) ... [2020-11-29 20:26:43,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (1/1) ... [2020-11-29 20:26:43,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (1/1) ... [2020-11-29 20:26:43,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:26:43,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:26:43,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:26:43,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:26:43,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/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 [2020-11-29 20:26:43,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 20:26:43,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:26:43,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-29 20:26:43,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:26:43,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:26:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-11-29 20:26:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:26:44,319 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:26:44,319 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-29 20:26:44,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:26:44 BoogieIcfgContainer [2020-11-29 20:26:44,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:26:44,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:26:44,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:26:44,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:26:44,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:26:42" (1/3) ... [2020-11-29 20:26:44,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65da8030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:26:44, skipping insertion in model container [2020-11-29 20:26:44,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:26:43" (2/3) ... [2020-11-29 20:26:44,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65da8030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:26:44, skipping insertion in model container [2020-11-29 20:26:44,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:26:44" (3/3) ... [2020-11-29 20:26:44,341 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-11-29 20:26:44,370 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:26:44,375 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:26:44,400 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 20:26:44,429 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:26:44,429 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:26:44,429 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:26:44,429 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:26:44,429 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:26:44,430 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:26:44,430 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:26:44,430 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:26:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-29 20:26:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:26:44,457 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:44,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:44,459 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-11-29 20:26:44,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:26:44,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696758110] [2020-11-29 20:26:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/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 [2020-11-29 20:26:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 20:26:44,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:44,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:26:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:44,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696758110] [2020-11-29 20:26:44,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:44,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 20:26:44,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463412697] [2020-11-29 20:26:44,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 20:26:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:26:44,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 20:26:44,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:26:44,690 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-29 20:26:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:44,713 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-11-29 20:26:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 20:26:44,715 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 20:26:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:44,727 INFO L225 Difference]: With dead ends: 63 [2020-11-29 20:26:44,728 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 20:26:44,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 20:26:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 20:26:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 20:26:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 20:26:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-11-29 20:26:44,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-11-29 20:26:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:44,775 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-11-29 20:26:44,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 20:26:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-11-29 20:26:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 20:26:44,777 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:44,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:44,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 20:26:44,992 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-11-29 20:26:45,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:26:45,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206426704] [2020-11-29 20:26:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/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 [2020-11-29 20:26:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:45,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 20:26:45,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:45,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:26:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:45,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206426704] [2020-11-29 20:26:45,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:45,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 20:26:45,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110034330] [2020-11-29 20:26:45,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:26:45,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:26:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:26:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:26:45,241 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-11-29 20:26:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:45,435 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-11-29 20:26:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:26:45,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-29 20:26:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:45,439 INFO L225 Difference]: With dead ends: 68 [2020-11-29 20:26:45,441 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 20:26:45,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:26:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 20:26:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-11-29 20:26:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 20:26:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 20:26:45,461 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-11-29 20:26:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:45,462 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 20:26:45,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:26:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 20:26:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:26:45,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:45,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:45,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 20:26:45,683 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-11-29 20:26:45,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:26:45,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852014628] [2020-11-29 20:26:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/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 [2020-11-29 20:26:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 20:26:45,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:45,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:26:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:45,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852014628] [2020-11-29 20:26:45,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:45,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-29 20:26:45,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017937262] [2020-11-29 20:26:45,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:26:45,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:26:45,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:26:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:26:45,951 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 20:26:46,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:46,060 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-11-29 20:26:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:26:46,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 20:26:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:46,063 INFO L225 Difference]: With dead ends: 52 [2020-11-29 20:26:46,063 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 20:26:46,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:26:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 20:26:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 20:26:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 20:26:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-11-29 20:26:46,070 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-11-29 20:26:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:46,070 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-11-29 20:26:46,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:26:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-11-29 20:26:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 20:26:46,074 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:46,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:46,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 20:26:46,275 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:46,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-11-29 20:26:46,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:26:46,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940955956] [2020-11-29 20:26:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/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 [2020-11-29 20:26:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:46,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 20:26:46,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:46,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:26:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:46,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940955956] [2020-11-29 20:26:46,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:46,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 20:26:46,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211683361] [2020-11-29 20:26:46,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:26:46,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:26:46,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:26:46,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:26:46,476 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-11-29 20:26:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:46,619 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-11-29 20:26:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:26:46,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-29 20:26:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:46,627 INFO L225 Difference]: With dead ends: 61 [2020-11-29 20:26:46,629 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 20:26:46,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:26:46,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 20:26:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-11-29 20:26:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:26:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-11-29 20:26:46,642 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-11-29 20:26:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:46,643 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-29 20:26:46,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:26:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-11-29 20:26:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 20:26:46,647 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:46,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:46,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 20:26:46,863 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:46,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-11-29 20:26:46,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:26:46,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069545416] [2020-11-29 20:26:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/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 [2020-11-29 20:26:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:46,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:26:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:46,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:26:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:47,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069545416] [2020-11-29 20:26:47,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:47,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-29 20:26:47,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941659337] [2020-11-29 20:26:47,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:26:47,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:26:47,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:26:47,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:26:47,034 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-11-29 20:26:47,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:47,051 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-11-29 20:26:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:26:47,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-29 20:26:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:47,053 INFO L225 Difference]: With dead ends: 38 [2020-11-29 20:26:47,053 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 20:26:47,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:26:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 20:26:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 20:26:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 20:26:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-29 20:26:47,060 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-11-29 20:26:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:47,060 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-29 20:26:47,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:26:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-29 20:26:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 20:26:47,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:47,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:47,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-29 20:26:47,262 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:47,263 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-11-29 20:26:47,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:26:47,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810878497] [2020-11-29 20:26:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-29 20:26:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:47,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:26:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:47,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:26:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:47,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810878497] [2020-11-29 20:26:47,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:47,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-11-29 20:26:47,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509225195] [2020-11-29 20:26:47,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:26:47,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:26:47,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:26:47,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:26:47,506 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-11-29 20:26:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:47,682 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-29 20:26:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:26:47,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-11-29 20:26:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:47,684 INFO L225 Difference]: With dead ends: 40 [2020-11-29 20:26:47,684 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 20:26:47,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:26:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 20:26:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-11-29 20:26:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 20:26:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-11-29 20:26:47,694 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-11-29 20:26:47,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:47,695 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-11-29 20:26:47,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:26:47,695 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-29 20:26:47,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 20:26:47,696 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:47,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:47,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-29 20:26:47,910 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:47,910 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-11-29 20:26:47,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:26:47,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001581470] [2020-11-29 20:26:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-29 20:26:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:48,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 20:26:48,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:48,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:26:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:48,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001581470] [2020-11-29 20:26:48,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:48,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-29 20:26:48,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551392285] [2020-11-29 20:26:48,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:26:48,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:26:48,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:26:48,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:26:48,126 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-11-29 20:26:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:48,210 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-11-29 20:26:48,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:26:48,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-29 20:26:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:48,219 INFO L225 Difference]: With dead ends: 43 [2020-11-29 20:26:48,219 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 20:26:48,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:26:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 20:26:48,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-29 20:26:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 20:26:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-11-29 20:26:48,224 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-11-29 20:26:48,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:48,224 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-11-29 20:26:48,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:26:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-11-29 20:26:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 20:26:48,225 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:48,225 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, 1, 1] [2020-11-29 20:26:48,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-29 20:26:48,440 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:26:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-11-29 20:26:48,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 20:26:48,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315794111] [2020-11-29 20:26:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-29 20:26:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:48,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 20:26:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:48,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:26:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:48,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 20:26:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:49,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315794111] [2020-11-29 20:26:49,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:26:49,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2020-11-29 20:26:49,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297711654] [2020-11-29 20:26:49,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 20:26:49,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 20:26:49,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 20:26:49,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:26:49,166 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand 16 states. [2020-11-29 20:26:49,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:49,529 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2020-11-29 20:26:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:26:49,531 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-11-29 20:26:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:49,531 INFO L225 Difference]: With dead ends: 23 [2020-11-29 20:26:49,531 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 20:26:49,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:26:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 20:26:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 20:26:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 20:26:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 20:26:49,533 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-11-29 20:26:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:49,533 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:26:49,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 20:26:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 20:26:49,534 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 20:26:49,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-29 20:26:49,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 20:26:50,082 INFO L277 CegarLoopResult]: At program point L85(lines 67 86) the Hoare annotation is: true [2020-11-29 20:26:50,082 INFO L274 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-11-29 20:26:50,082 INFO L274 CegarLoopResult]: For program point L52-2(line 52) no Hoare annotation was computed. [2020-11-29 20:26:50,083 INFO L270 CegarLoopResult]: At program point L52-3(lines 44 53) the Hoare annotation is: (and (= (_ +zero 8 24) |ULTIMATE.start_fmax_float_#res|) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-11-29 20:26:50,083 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 20:26:50,083 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-11-29 20:26:50,083 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 20:26:50,083 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 20:26:50,083 INFO L274 CegarLoopResult]: For program point L45(lines 45 47) no Hoare annotation was computed. [2020-11-29 20:26:50,084 INFO L274 CegarLoopResult]: For program point L38(lines 38 41) no Hoare annotation was computed. [2020-11-29 20:26:50,084 INFO L274 CegarLoopResult]: For program point L38-1(lines 38 41) no Hoare annotation was computed. [2020-11-29 20:26:50,084 INFO L274 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-11-29 20:26:50,084 INFO L274 CegarLoopResult]: For program point L80-2(lines 80 83) no Hoare annotation was computed. [2020-11-29 20:26:50,084 INFO L270 CegarLoopResult]: At program point L64(lines 55 65) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short16| (= (_ +zero 8 24) ULTIMATE.start_main_~res~0) (= (_ +zero 8 24) |ULTIMATE.start_fmax_float_#res|) (= (_ +zero 8 24) (fp ((_ extract 31 31) ULTIMATE.start___signbit_float_~w~1) ((_ extract 30 23) ULTIMATE.start___signbit_float_~w~1) ((_ extract 22 0) ULTIMATE.start___signbit_float_~w~1))) (= (_ +zero 8 24) ULTIMATE.start___signbit_float_~x) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= |ULTIMATE.start___signbit_float_#res| (_ bv0 32)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-11-29 20:26:50,084 INFO L274 CegarLoopResult]: For program point L32(lines 32 41) no Hoare annotation was computed. [2020-11-29 20:26:50,084 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 20:26:50,084 INFO L274 CegarLoopResult]: For program point L32-1(lines 32 41) no Hoare annotation was computed. [2020-11-29 20:26:50,085 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 20:26:50,085 INFO L274 CegarLoopResult]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2020-11-29 20:26:50,085 INFO L270 CegarLoopResult]: At program point L24-2(lines 24 28) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= ULTIMATE.start___fpclassify_float_~x .cse0) (= ULTIMATE.start_fmax_float_~x .cse0) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)))) [2020-11-29 20:26:50,085 INFO L274 CegarLoopResult]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2020-11-29 20:26:50,085 INFO L274 CegarLoopResult]: For program point L24-5(lines 24 28) no Hoare annotation was computed. [2020-11-29 20:26:50,085 INFO L270 CegarLoopResult]: At program point L24-6(lines 24 28) the Hoare annotation is: (and (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-11-29 20:26:50,085 INFO L274 CegarLoopResult]: For program point L24-7(lines 21 42) no Hoare annotation was computed. [2020-11-29 20:26:50,085 INFO L274 CegarLoopResult]: For program point L49(lines 49 51) no Hoare annotation was computed. [2020-11-29 20:26:50,086 INFO L270 CegarLoopResult]: At program point L41(lines 21 42) the Hoare annotation is: (let ((.cse0 (fp.neg (_ +zero 8 24)))) (and (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) .cse0) (= ULTIMATE.start___fpclassify_float_~x .cse0) (= (_ bv2 32) |ULTIMATE.start___fpclassify_float_#res|) (= ULTIMATE.start_fmax_float_~x .cse0) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24)))) [2020-11-29 20:26:50,086 INFO L270 CegarLoopResult]: At program point L41-1(lines 21 42) the Hoare annotation is: (and (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-11-29 20:26:50,086 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 20:26:50,086 INFO L274 CegarLoopResult]: For program point L58-1(lines 58 62) no Hoare annotation was computed. [2020-11-29 20:26:50,086 INFO L270 CegarLoopResult]: At program point L58-2(lines 58 62) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short16| (= (_ +zero 8 24) ULTIMATE.start_main_~res~0) (= (_ +zero 8 24) |ULTIMATE.start_fmax_float_#res|) (= (_ +zero 8 24) ULTIMATE.start___signbit_float_~x) (= (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)) (_ +zero 8 24)) (= (_ +zero 8 24) ULTIMATE.start___fpclassify_float_~x) (= ULTIMATE.start_fmax_float_~x (fp.neg (_ +zero 8 24))) (= ULTIMATE.start_fmax_float_~y (_ +zero 8 24))) [2020-11-29 20:26:50,086 INFO L274 CegarLoopResult]: For program point L58-3(lines 58 62) no Hoare annotation was computed. [2020-11-29 20:26:50,086 INFO L274 CegarLoopResult]: For program point L35(lines 35 41) no Hoare annotation was computed. [2020-11-29 20:26:50,087 INFO L274 CegarLoopResult]: For program point L35-1(lines 35 41) no Hoare annotation was computed. [2020-11-29 20:26:50,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:26:50 BoogieIcfgContainer [2020-11-29 20:26:50,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:26:50,112 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:26:50,113 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:26:50,113 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:26:50,114 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:26:44" (3/4) ... [2020-11-29 20:26:50,117 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 20:26:50,131 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-29 20:26:50,132 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-29 20:26:50,132 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-29 20:26:50,132 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 20:26:50,163 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 2bv32 == \result) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-11-29 20:26:50,164 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~Pluszero~LONGDOUBLE() == \result && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-11-29 20:26:50,164 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-11-29 20:26:50,165 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((!(0bv32 == \result) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-11-29 20:26:50,166 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && \result == 0bv32) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() [2020-11-29 20:26:50,201 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_37331e41-4394-429f-8602-d743fcc32f8c/bin/uautomizer/witness.graphml [2020-11-29 20:26:50,201 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:26:50,206 INFO L168 Benchmark]: Toolchain (without parser) took 7205.04 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 37.3 MB in the beginning and 40.4 MB in the end (delta: -3.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:50,207 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 58.7 MB. Free memory is still 41.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:26:50,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.08 ms. Allocated memory is still 58.7 MB. Free memory was 37.2 MB in the beginning and 41.1 MB in the end (delta: -3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:50,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 113.66 ms. Allocated memory is still 58.7 MB. Free memory was 41.1 MB in the beginning and 39.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:50,211 INFO L168 Benchmark]: Boogie Preprocessor took 73.51 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 37.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:26:50,212 INFO L168 Benchmark]: RCFGBuilder took 814.34 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.7 MB in the beginning and 46.0 MB in the end (delta: -8.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:50,212 INFO L168 Benchmark]: TraceAbstraction took 5788.36 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 45.5 MB in the beginning and 43.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:50,213 INFO L168 Benchmark]: Witness Printer took 88.75 ms. Allocated memory is still 86.0 MB. Free memory was 43.8 MB in the beginning and 40.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:26:50,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 58.7 MB. Free memory is still 41.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 318.08 ms. Allocated memory is still 58.7 MB. Free memory was 37.2 MB in the beginning and 41.1 MB in the end (delta: -3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 113.66 ms. Allocated memory is still 58.7 MB. Free memory was 41.1 MB in the beginning and 39.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.51 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 37.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 814.34 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.7 MB in the beginning and 46.0 MB in the end (delta: -8.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5788.36 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 45.5 MB in the beginning and 43.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * Witness Printer took 88.75 ms. Allocated memory is still 86.0 MB. Free memory was 43.8 MB in the beginning and 40.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: ((((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && \result == 0bv32) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (((~Pluszero~LONGDOUBLE() == \result && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (~Pluszero~LONGDOUBLE() == x && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((!(0bv32 == \result) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: ((((((aux-res == 0.0f && __signbit_float(res) == 0-aux && ~Pluszero~LONGDOUBLE() == res) && ~Pluszero~LONGDOUBLE() == \result) && ~Pluszero~LONGDOUBLE() == x) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && ~Pluszero~LONGDOUBLE() == x) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && 2bv32 == \result) && x == ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE())) && y == ~Pluszero~LONGDOUBLE() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 204 SDslu, 399 SDs, 0 SdLazy, 150 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 16 NumberOfFragments, 168 HoareAnnotationTreeSize, 8 FomulaSimplifications, 44 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 240 ConstructedInterpolants, 15 QuantifiedInterpolants, 14682 SizeOfPredicates, 38 NumberOfNonLiveVariables, 519 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...