./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:41:34,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:41:34,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:41:34,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:41:34,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:41:34,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:41:34,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:41:34,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:41:34,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:41:34,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:41:34,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:41:34,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:41:34,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:41:34,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:41:34,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:41:34,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:41:34,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:41:34,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:41:34,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:41:34,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:41:34,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:41:34,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:41:34,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:41:34,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:41:34,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:41:34,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:41:34,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:41:34,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:41:34,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:41:34,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:41:34,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:41:34,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:41:34,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:41:34,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:41:34,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:41:34,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:41:34,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:41:34,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:41:34,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:41:34,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:41:34,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:41:34,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:41:34,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:41:34,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:41:34,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:41:34,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:41:34,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:41:34,398 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:41:34,398 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:41:34,398 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:41:34,399 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:41:34,399 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:41:34,399 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:41:34,399 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:41:34,400 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:41:34,400 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:41:34,400 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:41:34,401 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:41:34,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:41:34,402 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:41:34,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:41:34,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:41:34,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:41:34,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:41:34,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:41:34,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:41:34,404 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:41:34,404 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:41:34,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:41:34,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:41:34,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:41:34,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:41:34,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:41:34,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:41:34,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:41:34,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:41:34,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:41:34,407 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:41:34,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:41:34,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:41:34,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:41:34,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:41:34,409 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 [2021-11-19 14:41:34,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:41:34,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:41:34,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:41:34,843 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:41:34,844 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:41:34,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-11-19 14:41:34,944 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/data/1938d310b/da0eee88ef2c4b16ac23331a26844db5/FLAG20a8e80ea [2021-11-19 14:41:35,590 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:41:35,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-11-19 14:41:35,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/data/1938d310b/da0eee88ef2c4b16ac23331a26844db5/FLAG20a8e80ea [2021-11-19 14:41:35,915 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/data/1938d310b/da0eee88ef2c4b16ac23331a26844db5 [2021-11-19 14:41:35,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:41:35,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:41:35,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:41:35,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:41:35,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:41:35,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:41:35" (1/1) ... [2021-11-19 14:41:35,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b012300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:35, skipping insertion in model container [2021-11-19 14:41:35,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:41:35" (1/1) ... [2021-11-19 14:41:35,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:41:35,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:41:36,298 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-11-19 14:41:36,303 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:41:36,316 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:41:36,361 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-11-19 14:41:36,363 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:41:36,381 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:41:36,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36 WrapperNode [2021-11-19 14:41:36,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:41:36,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:41:36,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:41:36,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:41:36,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (1/1) ... [2021-11-19 14:41:36,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (1/1) ... [2021-11-19 14:41:36,448 INFO L137 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2021-11-19 14:41:36,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:41:36,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:41:36,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:41:36,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:41:36,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (1/1) ... [2021-11-19 14:41:36,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (1/1) ... [2021-11-19 14:41:36,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (1/1) ... [2021-11-19 14:41:36,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (1/1) ... [2021-11-19 14:41:36,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (1/1) ... [2021-11-19 14:41:36,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (1/1) ... [2021-11-19 14:41:36,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (1/1) ... [2021-11-19 14:41:36,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:41:36,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:41:36,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:41:36,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:41:36,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (1/1) ... [2021-11-19 14:41:36,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:41:36,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:41:36,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:41:36,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:41:36,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:41:36,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:41:36,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:41:36,620 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-19 14:41:36,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-19 14:41:36,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-19 14:41:36,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:41:36,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:41:36,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 14:41:36,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:41:36,740 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:41:36,742 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:41:36,970 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:41:37,085 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:41:37,086 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 14:41:37,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:41:37 BoogieIcfgContainer [2021-11-19 14:41:37,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:41:37,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:41:37,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:41:37,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:41:37,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:41:35" (1/3) ... [2021-11-19 14:41:37,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b2b2296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:41:37, skipping insertion in model container [2021-11-19 14:41:37,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:36" (2/3) ... [2021-11-19 14:41:37,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b2b2296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:41:37, skipping insertion in model container [2021-11-19 14:41:37,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:41:37" (3/3) ... [2021-11-19 14:41:37,105 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-11-19 14:41:37,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:41:37,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:41:37,182 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:41:37,193 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:41:37,193 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:41:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:41:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 14:41:37,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:37,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:37,235 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1025925299, now seen corresponding path program 1 times [2021-11-19 14:41:37,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:41:37,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881048373] [2021-11-19 14:41:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:37,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:41:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:37,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:41:37,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881048373] [2021-11-19 14:41:37,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881048373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:37,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:37,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:41:37,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416086955] [2021-11-19 14:41:37,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:37,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:41:37,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:41:37,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:41:37,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:41:37,494 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:41:37,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:37,547 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-11-19 14:41:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:41:37,550 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-19 14:41:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:37,557 INFO L225 Difference]: With dead ends: 40 [2021-11-19 14:41:37,558 INFO L226 Difference]: Without dead ends: 19 [2021-11-19 14:41:37,561 INFO L932 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 [2021-11-19 14:41:37,566 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:37,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:41:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-19 14:41:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-19 14:41:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:41:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-19 14:41:37,608 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-11-19 14:41:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:37,609 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-19 14:41:37,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:41:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-19 14:41:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 14:41:37,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:37,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:37,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:41:37,613 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:37,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2077844235, now seen corresponding path program 1 times [2021-11-19 14:41:37,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:41:37,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307020421] [2021-11-19 14:41:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:37,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:41:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:41:37,659 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:41:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:41:37,741 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 14:41:37,742 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:41:37,744 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:41:37,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:41:37,753 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-19 14:41:37,756 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:41:37,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:41:37 BoogieIcfgContainer [2021-11-19 14:41:37,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:41:37,795 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:41:37,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:41:37,796 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:41:37,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:41:37" (3/4) ... [2021-11-19 14:41:37,800 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 14:41:37,800 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:41:37,801 INFO L158 Benchmark]: Toolchain (without parser) took 1881.69ms. Allocated memory is still 123.7MB. Free memory was 95.9MB in the beginning and 53.8MB in the end (delta: 42.1MB). Peak memory consumption was 39.9MB. Max. memory is 16.1GB. [2021-11-19 14:41:37,802 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 83.9MB. Free memory was 38.3MB in the beginning and 38.3MB in the end (delta: 71.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:41:37,803 INFO L158 Benchmark]: CACSL2BoogieTranslator took 461.48ms. Allocated memory is still 123.7MB. Free memory was 95.6MB in the beginning and 97.4MB in the end (delta: -1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:41:37,806 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.85ms. Allocated memory is still 123.7MB. Free memory was 97.4MB in the beginning and 95.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:41:37,808 INFO L158 Benchmark]: Boogie Preprocessor took 57.91ms. Allocated memory is still 123.7MB. Free memory was 95.9MB in the beginning and 94.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:41:37,812 INFO L158 Benchmark]: RCFGBuilder took 580.11ms. Allocated memory is still 123.7MB. Free memory was 94.4MB in the beginning and 80.0MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:41:37,813 INFO L158 Benchmark]: TraceAbstraction took 703.91ms. Allocated memory is still 123.7MB. Free memory was 79.7MB in the beginning and 54.1MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-19 14:41:37,816 INFO L158 Benchmark]: Witness Printer took 4.81ms. Allocated memory is still 123.7MB. Free memory was 54.1MB in the beginning and 53.8MB in the end (delta: 273.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:41:37,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 83.9MB. Free memory was 38.3MB in the beginning and 38.3MB in the end (delta: 71.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 461.48ms. Allocated memory is still 123.7MB. Free memory was 95.6MB in the beginning and 97.4MB in the end (delta: -1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.85ms. Allocated memory is still 123.7MB. Free memory was 97.4MB in the beginning and 95.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 57.91ms. Allocated memory is still 123.7MB. Free memory was 95.9MB in the beginning and 94.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 580.11ms. Allocated memory is still 123.7MB. Free memory was 94.4MB in the beginning and 80.0MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 703.91ms. Allocated memory is still 123.7MB. Free memory was 79.7MB in the beginning and 54.1MB in the end (delta: 25.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 4.81ms. Allocated memory is still 123.7MB. Free memory was 54.1MB in the beginning and 53.8MB in the end (delta: 273.5kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 81]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L77] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=0] [L23] __uint32_t w; VAL [\old(x)=0, x=0] [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] RET, EXPR __fpclassify_float(x) VAL [\old(x)=0, \old(y)=4286578690, __fpclassify_float(x)=0, x=0, y=4286578690] [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; VAL [\old(x)=0, \old(y)=4286578690, \result=4286578690, x=0, y=4286578690] [L77] RET, EXPR fmax_float(x, y) [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=4286578690, res == 0.0f && __signbit_float(res) == 0=0, x=0, y=4286578690] [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() VAL [res=4286578690, x=0, y=4286578690] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 18 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 18 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-19 14:41:37,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:41:40,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:41:40,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:41:40,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:41:40,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:41:40,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:41:40,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:41:40,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:41:40,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:41:40,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:41:40,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:41:40,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:41:40,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:41:40,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:41:40,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:41:40,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:41:40,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:41:40,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:41:40,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:41:40,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:41:40,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:41:40,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:41:40,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:41:40,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:41:40,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:41:40,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:41:40,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:41:40,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:41:40,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:41:40,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:41:40,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:41:40,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:41:40,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:41:40,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:41:40,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:41:40,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:41:40,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:41:40,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:41:40,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:41:40,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:41:40,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:41:40,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:41:41,010 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:41:41,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:41:41,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:41:41,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:41:41,013 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:41:41,013 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:41:41,013 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:41:41,014 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:41:41,014 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:41:41,014 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:41:41,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:41:41,017 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:41:41,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:41:41,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:41:41,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:41:41,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:41:41,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:41:41,019 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:41:41,019 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:41:41,019 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:41:41,019 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:41:41,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:41:41,020 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:41:41,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:41:41,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:41:41,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:41:41,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:41:41,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:41:41,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:41:41,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:41:41,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:41:41,022 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:41:41,022 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:41:41,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:41:41,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:41:41,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:41:41,023 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_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 [2021-11-19 14:41:41,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:41:41,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:41:41,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:41:41,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:41:41,531 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:41:41,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-11-19 14:41:41,631 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/data/0631769bf/7312ba806ddd46bca72f7739415d5208/FLAG4c0eb269c [2021-11-19 14:41:42,291 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:41:42,292 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-11-19 14:41:42,302 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/data/0631769bf/7312ba806ddd46bca72f7739415d5208/FLAG4c0eb269c [2021-11-19 14:41:42,608 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/data/0631769bf/7312ba806ddd46bca72f7739415d5208 [2021-11-19 14:41:42,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:41:42,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:41:42,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:41:42,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:41:42,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:41:42,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:42,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a9b567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42, skipping insertion in model container [2021-11-19 14:41:42,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:42,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:41:42,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:41:42,830 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-11-19 14:41:42,832 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:41:42,845 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:41:42,867 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-11-19 14:41:42,868 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:41:42,894 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:41:42,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42 WrapperNode [2021-11-19 14:41:42,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:41:42,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:41:42,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:41:42,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:41:42,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:42,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:42,973 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2021-11-19 14:41:42,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:41:42,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:41:42,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:41:42,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:41:42,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:42,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:42,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:42,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:42,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:43,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:43,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:43,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:41:43,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:41:43,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:41:43,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:41:43,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (1/1) ... [2021-11-19 14:41:43,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:41:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:41:43,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:41:43,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:41:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:41:43,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:41:43,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:41:43,099 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-19 14:41:43,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-19 14:41:43,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:41:43,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:41:43,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:41:43,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-11-19 14:41:43,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:41:43,229 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:41:43,231 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:41:43,500 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:41:43,507 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:41:43,507 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 14:41:43,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:41:43 BoogieIcfgContainer [2021-11-19 14:41:43,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:41:43,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:41:43,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:41:43,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:41:43,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:41:42" (1/3) ... [2021-11-19 14:41:43,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457d7214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:41:43, skipping insertion in model container [2021-11-19 14:41:43,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:41:42" (2/3) ... [2021-11-19 14:41:43,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457d7214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:41:43, skipping insertion in model container [2021-11-19 14:41:43,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:41:43" (3/3) ... [2021-11-19 14:41:43,536 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-11-19 14:41:43,542 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:41:43,543 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:41:43,670 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:41:43,693 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:41:43,693 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:41:43,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:41:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 14:41:43,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:43,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:43,745 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:43,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1826258672, now seen corresponding path program 1 times [2021-11-19 14:41:43,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:43,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122443361] [2021-11-19 14:41:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:43,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:43,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:43,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:43,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:41:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:43,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:41:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:43,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:44,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:44,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122443361] [2021-11-19 14:41:44,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122443361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:44,062 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:44,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:41:44,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567674027] [2021-11-19 14:41:44,066 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:44,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:41:44,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:44,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:41:44,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:41:44,122 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:41:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:44,157 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2021-11-19 14:41:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:41:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-19 14:41:44,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:44,180 INFO L225 Difference]: With dead ends: 55 [2021-11-19 14:41:44,181 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 14:41:44,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:41:44,194 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:44,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:41:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 14:41:44,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-19 14:41:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:41:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-19 14:41:44,268 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 13 [2021-11-19 14:41:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:44,269 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-19 14:41:44,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:41:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-19 14:41:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 14:41:44,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:44,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:44,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:44,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:44,495 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:44,520 INFO L85 PathProgramCache]: Analyzing trace with hash -503165124, now seen corresponding path program 1 times [2021-11-19 14:41:44,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:44,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60774926] [2021-11-19 14:41:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:44,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:44,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:44,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:44,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:41:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:41:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:44,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:44,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:44,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60774926] [2021-11-19 14:41:44,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60774926] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:44,849 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:44,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:41:44,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253803804] [2021-11-19 14:41:44,850 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:44,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:41:44,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:41:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:41:44,854 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:41:44,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:44,901 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-11-19 14:41:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:41:44,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-19 14:41:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:44,905 INFO L225 Difference]: With dead ends: 41 [2021-11-19 14:41:44,905 INFO L226 Difference]: Without dead ends: 32 [2021-11-19 14:41:44,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:41:44,908 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:44,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:41:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-19 14:41:44,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-11-19 14:41:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:41:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-11-19 14:41:44,932 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2021-11-19 14:41:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:44,933 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-11-19 14:41:44,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:41:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-11-19 14:41:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 14:41:44,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:44,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:44,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:45,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:45,152 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash -69350008, now seen corresponding path program 1 times [2021-11-19 14:41:45,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:45,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121651354] [2021-11-19 14:41:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:45,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:45,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:45,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:45,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:41:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:41:45,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:45,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:41:46,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:46,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121651354] [2021-11-19 14:41:46,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121651354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:46,080 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:46,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 14:41:46,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193239516] [2021-11-19 14:41:46,081 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:46,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:41:46,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:46,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:41:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:41:46,084 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:41:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:46,301 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-11-19 14:41:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:41:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-19 14:41:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:46,304 INFO L225 Difference]: With dead ends: 58 [2021-11-19 14:41:46,305 INFO L226 Difference]: Without dead ends: 32 [2021-11-19 14:41:46,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:41:46,307 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:46,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 119 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2021-11-19 14:41:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-19 14:41:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-11-19 14:41:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 14:41:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-19 14:41:46,318 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2021-11-19 14:41:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:46,319 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-19 14:41:46,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 14:41:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-19 14:41:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 14:41:46,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:46,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:46,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:46,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:46,536 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:46,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:46,537 INFO L85 PathProgramCache]: Analyzing trace with hash -538621340, now seen corresponding path program 1 times [2021-11-19 14:41:46,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:46,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887426953] [2021-11-19 14:41:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:46,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:46,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:46,540 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:46,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:41:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:46,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:41:46,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:41:46,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:41:46,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:46,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887426953] [2021-11-19 14:41:46,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887426953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:46,798 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:46,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:41:46,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348734811] [2021-11-19 14:41:46,798 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:46,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:41:46,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:46,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:41:46,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:41:46,801 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:41:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:46,830 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-11-19 14:41:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:41:46,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-11-19 14:41:46,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:46,832 INFO L225 Difference]: With dead ends: 43 [2021-11-19 14:41:46,833 INFO L226 Difference]: Without dead ends: 34 [2021-11-19 14:41:46,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:41:46,835 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:46,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:41:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-19 14:41:46,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-11-19 14:41:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:41:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-19 14:41:46,844 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 22 [2021-11-19 14:41:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:46,845 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-19 14:41:46,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:41:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-19 14:41:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:41:46,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:46,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:46,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:47,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:47,068 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:47,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash -636835510, now seen corresponding path program 1 times [2021-11-19 14:41:47,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:47,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019856116] [2021-11-19 14:41:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:47,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:47,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:47,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:47,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:41:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:47,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:41:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:41:47,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:41:47,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:47,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019856116] [2021-11-19 14:41:47,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019856116] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:47,416 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:47,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:41:47,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920085681] [2021-11-19 14:41:47,416 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:47,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:41:47,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:41:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:41:47,418 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:41:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:47,430 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-19 14:41:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:41:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2021-11-19 14:41:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:47,432 INFO L225 Difference]: With dead ends: 41 [2021-11-19 14:41:47,433 INFO L226 Difference]: Without dead ends: 31 [2021-11-19 14:41:47,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:41:47,435 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:47,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:41:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-19 14:41:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-19 14:41:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:41:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-19 14:41:47,443 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 24 [2021-11-19 14:41:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:47,443 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-19 14:41:47,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:41:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-19 14:41:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 14:41:47,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:47,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:47,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:47,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:47,662 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:47,663 INFO L85 PathProgramCache]: Analyzing trace with hash -579577208, now seen corresponding path program 1 times [2021-11-19 14:41:47,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:47,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645450095] [2021-11-19 14:41:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:47,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:47,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:47,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:47,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:41:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:47,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:41:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:41:47,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:41:47,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:47,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645450095] [2021-11-19 14:41:47,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645450095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:47,988 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:47,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 14:41:47,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832633802] [2021-11-19 14:41:47,989 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:47,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:41:47,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:41:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:41:47,991 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:41:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:48,103 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-19 14:41:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:41:48,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2021-11-19 14:41:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:48,105 INFO L225 Difference]: With dead ends: 43 [2021-11-19 14:41:48,106 INFO L226 Difference]: Without dead ends: 40 [2021-11-19 14:41:48,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:41:48,107 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:48,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 118 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:41:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-19 14:41:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-11-19 14:41:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:41:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-11-19 14:41:48,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2021-11-19 14:41:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:48,116 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-11-19 14:41:48,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:41:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-11-19 14:41:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 14:41:48,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:48,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:48,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:48,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:48,335 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2027254888, now seen corresponding path program 1 times [2021-11-19 14:41:48,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:48,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979887850] [2021-11-19 14:41:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:48,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:48,337 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:48,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:41:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:48,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:41:48,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:41:48,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:41:48,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:48,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979887850] [2021-11-19 14:41:48,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979887850] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:48,955 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:48,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 14:41:48,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410279570] [2021-11-19 14:41:48,956 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:48,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:41:48,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:41:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:41:48,958 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:41:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:49,535 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-11-19 14:41:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:41:49,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-11-19 14:41:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:49,541 INFO L225 Difference]: With dead ends: 47 [2021-11-19 14:41:49,541 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 14:41:49,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:41:49,542 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:49,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 80 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2021-11-19 14:41:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 14:41:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-19 14:41:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 14:41:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-19 14:41:49,552 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2021-11-19 14:41:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:49,553 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-19 14:41:49,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:41:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-19 14:41:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 14:41:49,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:49,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:49,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 14:41:49,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:49,772 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:49,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1580504541, now seen corresponding path program 1 times [2021-11-19 14:41:49,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:49,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758104397] [2021-11-19 14:41:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:49,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:49,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:49,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:49,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:41:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:41:49,871 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:41:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:41:49,961 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-19 14:41:49,961 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:41:49,963 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:41:49,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:50,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:50,186 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:50,188 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:41:50,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:41:50 BoogieIcfgContainer [2021-11-19 14:41:50,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:41:50,239 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:41:50,239 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:41:50,239 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:41:50,240 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:41:43" (3/4) ... [2021-11-19 14:41:50,242 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 14:41:50,319 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/witness.graphml [2021-11-19 14:41:50,319 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:41:50,320 INFO L158 Benchmark]: Toolchain (without parser) took 7706.35ms. Allocated memory was 62.9MB in the beginning and 86.0MB in the end (delta: 23.1MB). Free memory was 42.0MB in the beginning and 36.4MB in the end (delta: 5.6MB). Peak memory consumption was 28.9MB. Max. memory is 16.1GB. [2021-11-19 14:41:50,320 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 62.9MB. Free memory is still 42.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:41:50,321 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.49ms. Allocated memory is still 62.9MB. Free memory was 41.7MB in the beginning and 45.7MB in the end (delta: -4.0MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2021-11-19 14:41:50,321 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.15ms. Allocated memory is still 62.9MB. Free memory was 45.7MB in the beginning and 44.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:41:50,322 INFO L158 Benchmark]: Boogie Preprocessor took 38.83ms. Allocated memory is still 62.9MB. Free memory was 44.2MB in the beginning and 42.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:41:50,322 INFO L158 Benchmark]: RCFGBuilder took 495.69ms. Allocated memory is still 62.9MB. Free memory was 42.6MB in the beginning and 31.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:41:50,323 INFO L158 Benchmark]: TraceAbstraction took 6710.20ms. Allocated memory was 62.9MB in the beginning and 86.0MB in the end (delta: 23.1MB). Free memory was 30.7MB in the beginning and 39.2MB in the end (delta: -8.5MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2021-11-19 14:41:50,324 INFO L158 Benchmark]: Witness Printer took 80.25ms. Allocated memory is still 86.0MB. Free memory was 39.2MB in the beginning and 36.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:41:50,331 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 62.9MB. Free memory is still 42.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.49ms. Allocated memory is still 62.9MB. Free memory was 41.7MB in the beginning and 45.7MB in the end (delta: -4.0MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 78.15ms. Allocated memory is still 62.9MB. Free memory was 45.7MB in the beginning and 44.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.83ms. Allocated memory is still 62.9MB. Free memory was 44.2MB in the beginning and 42.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 495.69ms. Allocated memory is still 62.9MB. Free memory was 42.6MB in the beginning and 31.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6710.20ms. Allocated memory was 62.9MB in the beginning and 86.0MB in the end (delta: 23.1MB). Free memory was 30.7MB in the beginning and 39.2MB in the end (delta: -8.5MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. * Witness Printer took 80.25ms. Allocated memory is still 86.0MB. Free memory was 39.2MB in the beginning and 36.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 81]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L77] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=0.0] [L23] __uint32_t w; VAL [\old(x)=0.0, x=0.0] [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; VAL [\old(x)=0.0, \result=2, w=0, x=0.0] [L46] RET, EXPR __fpclassify_float(x) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_float(x)=2, x=0.0, y=0.0] [L46] COND FALSE !(__fpclassify_float(x) == 0) [L50] CALL, EXPR __fpclassify_float(y) VAL [\old(x)=0.0] [L23] __uint32_t w; VAL [\old(x)=0.0, x=0.0] [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; VAL [\old(x)=0.0, \result=2, w=2147483648, x=0.0] [L50] RET, EXPR __fpclassify_float(y) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_float(y)=2, x=0.0, y=0.0] [L50] COND FALSE !(__fpclassify_float(y) == 0) [L53] EXPR x > y ? x : y VAL [\old(x)=0.0, \old(y)=0.0, x=0.0, x > y ? x : y=0.0, y=0.0] [L53] return x > y ? x : y; [L77] RET, EXPR fmax_float(x, y) [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] CALL, EXPR __signbit_float(res) [L57] __uint32_t w; VAL [\old(x)=0.0, x=0.0] [L60] ieee_float_shape_type gf_u; [L61] gf_u.value = (x) [L62] EXPR gf_u.word [L62] (w) = gf_u.word [L65] return (w & 0x80000000) != 0; VAL [\old(x)=0.0, \result=1, w=2147483648, x=0.0] [L80] RET, EXPR __signbit_float(res) [L80] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [__signbit_float(res)=1, res=0.0, res == 0.0f && __signbit_float(res) == 0=0, x=0.0, y=0.0] [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() VAL [res=0.0, x=0.0, y=0.0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.5s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 155 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 150 mSDsluCounter, 612 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 18 IncrementalHoareTripleChecker+Unchecked, 409 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 139 IncrementalHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 203 mSDtfsCounter, 139 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 275 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=6, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 17 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 167 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 12 QuantifiedInterpolants, 681 SizeOfPredicates, 23 NumberOfNonLiveVariables, 441 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 48/48 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 incorrect! [2021-11-19 14:41:50,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72da3bc5-3d44-4da1-9569-61caf05decf4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE