./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur --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 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:04:12,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:04:12,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:04:12,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:04:12,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:04:12,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:04:12,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:04:12,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:04:12,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:04:12,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:04:12,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:04:12,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:04:12,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:04:12,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:04:12,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:04:12,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:04:12,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:04:12,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:04:12,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:04:12,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:04:12,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:04:12,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:04:12,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:04:12,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:04:12,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:04:12,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:04:12,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:04:12,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:04:12,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:04:12,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:04:12,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:04:12,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:04:12,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:04:12,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:04:12,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:04:12,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:04:12,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:04:12,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:04:12,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:04:12,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:04:12,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:04:12,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:04:12,453 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:04:12,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:04:12,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:04:12,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:04:12,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:04:12,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:04:12,456 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:04:12,456 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:04:12,457 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:04:12,457 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:04:12,458 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:04:12,458 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:04:12,458 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:04:12,459 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:04:12,459 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:04:12,459 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:04:12,459 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:04:12,460 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:04:12,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:04:12,461 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:04:12,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:04:12,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:04:12,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:04:12,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:04:12,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:04:12,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:04:12,463 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:04:12,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:04:12,463 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:04:12,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:04:12,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:04:12,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:04:12,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:04:12,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:04:12,465 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:04:12,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:04:12,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:04:12,466 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:04:12,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:04:12,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:04:12,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:04:12,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2022-11-26 00:04:12,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:04:12,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:04:12,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:04:12,760 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:04:12,761 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:04:12,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2022-11-26 00:04:15,865 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:04:16,099 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:04:16,100 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2022-11-26 00:04:16,109 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/data/f7f25d675/cc46707fe2d0463db485c726cc7857be/FLAG6aef5bb76 [2022-11-26 00:04:16,124 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/data/f7f25d675/cc46707fe2d0463db485c726cc7857be [2022-11-26 00:04:16,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:04:16,133 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:04:16,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:04:16,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:04:16,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:04:16,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@274485d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16, skipping insertion in model container [2022-11-26 00:04:16,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:04:16,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:04:16,341 WARN L237 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_27413c8f-efc1-4473-9155-ee37d77193aa/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2022-11-26 00:04:16,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:04:16,370 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:04:16,384 WARN L237 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_27413c8f-efc1-4473-9155-ee37d77193aa/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2022-11-26 00:04:16,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:04:16,401 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:04:16,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16 WrapperNode [2022-11-26 00:04:16,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:04:16,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:04:16,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:04:16,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:04:16,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,437 INFO L138 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2022-11-26 00:04:16,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:04:16,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:04:16,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:04:16,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:04:16,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,470 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:04:16,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:04:16,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:04:16,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:04:16,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (1/1) ... [2022-11-26 00:04:16,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:04:16,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:16,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:04:16,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:04:16,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:04:16,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:04:16,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:04:16,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:04:16,643 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:04:16,644 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:04:16,739 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:04:16,760 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:04:16,760 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:04:16,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:16 BoogieIcfgContainer [2022-11-26 00:04:16,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:04:16,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:04:16,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:04:16,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:04:16,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:04:16" (1/3) ... [2022-11-26 00:04:16,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee36fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:16, skipping insertion in model container [2022-11-26 00:04:16,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:16" (2/3) ... [2022-11-26 00:04:16,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee36fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:16, skipping insertion in model container [2022-11-26 00:04:16,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:16" (3/3) ... [2022-11-26 00:04:16,772 INFO L112 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2022-11-26 00:04:16,792 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:04:16,792 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:04:16,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:04:16,859 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26f870b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:04:16,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:04:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:04:16,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:16,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:04:16,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:16,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:16,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2022-11-26 00:04:16,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:16,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654808403] [2022-11-26 00:04:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:04:16,990 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:04:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:04:17,020 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:04:17,022 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:04:17,024 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:04:17,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:04:17,031 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-11-26 00:04:17,035 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:04:17,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:04:17 BoogieIcfgContainer [2022-11-26 00:04:17,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:04:17,054 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:04:17,054 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:04:17,054 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:04:17,055 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:16" (3/4) ... [2022-11-26 00:04:17,059 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-26 00:04:17,060 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:04:17,061 INFO L158 Benchmark]: Toolchain (without parser) took 927.34ms. Allocated memory is still 130.0MB. Free memory was 99.4MB in the beginning and 63.4MB in the end (delta: 36.0MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2022-11-26 00:04:17,061 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory is still 73.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:04:17,062 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.49ms. Allocated memory is still 130.0MB. Free memory was 99.4MB in the beginning and 89.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:04:17,063 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.78ms. Allocated memory is still 130.0MB. Free memory was 89.3MB in the beginning and 88.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:04:17,063 INFO L158 Benchmark]: Boogie Preprocessor took 34.50ms. Allocated memory is still 130.0MB. Free memory was 88.0MB in the beginning and 86.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:04:17,078 INFO L158 Benchmark]: RCFGBuilder took 289.27ms. Allocated memory is still 130.0MB. Free memory was 86.8MB in the beginning and 77.2MB in the end (delta: 9.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 00:04:17,079 INFO L158 Benchmark]: TraceAbstraction took 288.47ms. Allocated memory is still 130.0MB. Free memory was 76.4MB in the beginning and 63.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 00:04:17,079 INFO L158 Benchmark]: Witness Printer took 5.86ms. Allocated memory is still 130.0MB. Free memory was 63.8MB in the beginning and 63.4MB in the end (delta: 400.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:04:17,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory is still 73.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.49ms. Allocated memory is still 130.0MB. Free memory was 99.4MB in the beginning and 89.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.78ms. Allocated memory is still 130.0MB. Free memory was 89.3MB in the beginning and 88.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.50ms. Allocated memory is still 130.0MB. Free memory was 88.0MB in the beginning and 86.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 289.27ms. Allocated memory is still 130.0MB. Free memory was 86.8MB in the beginning and 77.2MB in the end (delta: 9.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 288.47ms. Allocated memory is still 130.0MB. Free memory was 76.4MB in the beginning and 63.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 5.86ms. Allocated memory is still 130.0MB. Free memory was 63.8MB in the beginning and 63.4MB in the end (delta: 400.5kB). 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: 13]: 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 23, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L20] float x = 1.0f; [L21] float x1 = x/1.6f; VAL [x=1] [L23] COND FALSE !(x1 != x) [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 [2022-11-26 00:04:17,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur --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 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:04:19,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:04:19,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:04:19,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:04:19,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:04:19,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:04:19,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:04:19,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:04:19,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:04:19,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:04:19,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:04:19,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:04:19,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:04:19,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:04:19,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:04:19,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:04:19,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:04:19,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:04:19,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:04:19,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:04:19,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:04:19,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:04:19,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:04:19,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:04:19,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:04:19,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:04:19,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:04:19,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:04:19,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:04:19,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:04:19,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:04:19,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:04:19,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:04:19,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:04:19,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:04:19,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:04:19,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:04:19,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:04:19,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:04:19,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:04:19,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:04:19,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-26 00:04:19,590 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:04:19,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:04:19,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:04:19,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:04:19,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:04:19,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:04:19,593 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:04:19,593 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:04:19,593 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:04:19,594 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:04:19,594 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:04:19,594 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:04:19,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:04:19,595 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:04:19,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:04:19,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:04:19,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:04:19,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:04:19,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:04:19,597 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:04:19,597 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 00:04:19,597 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 00:04:19,597 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:04:19,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:04:19,598 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:04:19,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:04:19,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:04:19,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 00:04:19,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:04:19,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:04:19,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:04:19,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:04:19,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:04:19,600 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 00:04:19,600 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 00:04:19,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:04:19,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:04:19,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 00:04:19,601 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_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2022-11-26 00:04:19,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:04:19,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:04:19,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:04:19,954 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:04:19,954 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:04:19,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2022-11-26 00:04:23,149 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:04:23,393 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:04:23,394 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2022-11-26 00:04:23,401 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/data/a6c50e9d2/e295516b1b4f452a82d10d744eab09f7/FLAG1d9d037f8 [2022-11-26 00:04:23,428 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/data/a6c50e9d2/e295516b1b4f452a82d10d744eab09f7 [2022-11-26 00:04:23,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:04:23,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:04:23,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:04:23,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:04:23,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:04:23,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48597b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23, skipping insertion in model container [2022-11-26 00:04:23,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:04:23,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:04:23,613 WARN L237 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_27413c8f-efc1-4473-9155-ee37d77193aa/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2022-11-26 00:04:23,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:04:23,639 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:04:23,652 WARN L237 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_27413c8f-efc1-4473-9155-ee37d77193aa/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2022-11-26 00:04:23,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:04:23,669 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:04:23,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23 WrapperNode [2022-11-26 00:04:23,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:04:23,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:04:23,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:04:23,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:04:23,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,704 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2022-11-26 00:04:23,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:04:23,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:04:23,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:04:23,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:04:23,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,727 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:04:23,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:04:23,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:04:23,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:04:23,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (1/1) ... [2022-11-26 00:04:23,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:04:23,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:23,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:04:23,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:04:23,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:04:23,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 00:04:23,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:04:23,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:04:23,921 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:04:23,923 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:04:24,731 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:04:24,740 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:04:24,740 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:04:24,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:24 BoogieIcfgContainer [2022-11-26 00:04:24,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:04:24,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:04:24,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:04:24,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:04:24,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:04:23" (1/3) ... [2022-11-26 00:04:24,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa1e731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:24, skipping insertion in model container [2022-11-26 00:04:24,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:23" (2/3) ... [2022-11-26 00:04:24,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa1e731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:24, skipping insertion in model container [2022-11-26 00:04:24,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:24" (3/3) ... [2022-11-26 00:04:24,754 INFO L112 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2022-11-26 00:04:24,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:04:24,777 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:04:24,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:04:24,835 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@340df735, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:04:24,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:04:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:04:24,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:24,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:04:24,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:24,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:24,854 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2022-11-26 00:04:24,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:24,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849792346] [2022-11-26 00:04:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:24,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:24,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:04:24,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-26 00:04:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:25,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:04:25,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:26,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:04:26,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:26,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849792346] [2022-11-26 00:04:26,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849792346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:26,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:26,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:04:26,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056807735] [2022-11-26 00:04:26,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:26,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:04:26,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:26,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:04:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:04:26,954 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:28,601 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-26 00:04:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:04:28,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:04:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:28,613 INFO L225 Difference]: With dead ends: 20 [2022-11-26 00:04:28,613 INFO L226 Difference]: Without dead ends: 8 [2022-11-26 00:04:28,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:28,619 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:28,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 15 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:04:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-26 00:04:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-26 00:04:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-11-26 00:04:28,645 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2022-11-26 00:04:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:28,645 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-11-26 00:04:28,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:04:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-11-26 00:04:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:04:28,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:28,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:28,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:28,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:28,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2022-11-26 00:04:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:28,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244187105] [2022-11-26 00:04:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:28,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:28,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:28,866 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:04:28,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-26 00:04:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:29,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:04:29,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:33,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:45,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:45,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244187105] [2022-11-26 00:04:45,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244187105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:45,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [874375913] [2022-11-26 00:04:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:45,113 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:04:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:04:45,118 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:04:45,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-26 00:04:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:45,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:04:45,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:46,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:54,004 WARN L837 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2022-11-26 00:04:56,072 WARN L859 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2022-11-26 00:04:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:56,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [874375913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:56,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405741746] [2022-11-26 00:04:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:56,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:56,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:56,075 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:56,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:04:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:57,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:04:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:05:09,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:20,840 WARN L859 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) is different from true [2022-11-26 00:05:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-26 00:05:27,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405741746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:27,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:05:27,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 6] total 14 [2022-11-26 00:05:27,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225874255] [2022-11-26 00:05:27,734 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:27,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:05:27,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:05:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=95, Unknown=3, NotChecked=42, Total=182 [2022-11-26 00:05:27,736 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:29,949 WARN L859 $PredicateComparison]: unable to prove that (and (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-11-26 00:05:44,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:06:02,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:06:04,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:06:08,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:06:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:08,796 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-11-26 00:06:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:06:08,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:06:08,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:08,797 INFO L225 Difference]: With dead ends: 15 [2022-11-26 00:06:08,797 INFO L226 Difference]: Without dead ends: 11 [2022-11-26 00:06:08,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 58.8s TimeCoverageRelationStatistics Valid=68, Invalid=145, Unknown=9, NotChecked=84, Total=306 [2022-11-26 00:06:08,801 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:08,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 1 Unknown, 19 Unchecked, 10.1s Time] [2022-11-26 00:06:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-26 00:06:08,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-26 00:06:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-11-26 00:06:08,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2022-11-26 00:06:08,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:08,805 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-11-26 00:06:08,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-11-26 00:06:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:06:08,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:08,806 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:08,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:09,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:09,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:09,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:09,428 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2022-11-26 00:06:09,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:09,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822052120] [2022-11-26 00:06:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:06:09,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:06:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:09,431 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:06:09,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-26 00:06:10,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:06:10,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:10,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:06:10,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:15,888 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-11-26 00:06:21,379 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-11-26 00:06:28,301 WARN L859 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0)))) is different from true [2022-11-26 00:06:36,504 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-11-26 00:06:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-11-26 00:06:36,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:02,039 WARN L233 SmtUtils]: Spent 6.91s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:07:10,428 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2022-11-26 00:07:12,512 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2022-11-26 00:07:23,279 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2022-11-26 00:07:25,419 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2022-11-26 00:07:36,777 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2022-11-26 00:07:38,957 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2022-11-26 00:07:50,730 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2022-11-26 00:07:52,977 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2022-11-26 00:07:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-11-26 00:07:52,978 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:07:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822052120] [2022-11-26 00:07:52,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822052120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [406343474] [2022-11-26 00:07:52,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:07:52,978 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:07:52,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:07:52,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:07:52,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-26 00:07:54,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:07:54,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:07:54,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:07:54,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-11-26 00:08:12,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:46,678 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:08:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-11-26 00:08:51,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [406343474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567004829] [2022-11-26 00:08:51,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:08:51,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:51,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:51,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:51,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:08:56,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:08:56,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:08:56,730 WARN L261 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:08:56,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:21,011 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:09:36,803 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-11-26 00:09:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 9 not checked. [2022-11-26 00:09:42,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:09:52,931 WARN L859 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) is different from true [2022-11-26 00:10:12,223 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|)))) is different from false [2022-11-26 00:10:14,315 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|)))) is different from true [2022-11-26 00:10:34,676 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))))) is different from false [2022-11-26 00:10:36,820 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))))) is different from true [2022-11-26 00:10:53,005 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse2))))) is different from false [2022-11-26 00:10:55,193 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse2))))) is different from true [2022-11-26 00:11:12,057 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))))) is different from false [2022-11-26 00:11:14,284 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))))) is different from true [2022-11-26 00:11:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-11-26 00:11:14,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567004829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:11:14,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:11:14,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7, 9, 7, 9] total 22 [2022-11-26 00:11:14,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206722473] [2022-11-26 00:11:14,286 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:11:14,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:11:14,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:11:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:11:14,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=51, Unknown=30, NotChecked=378, Total=506 [2022-11-26 00:11:14,288 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:11:16,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:11:18,591 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse3 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4) .cse4) .cse4))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 .cse4))) (let ((.cse0 (fp.eq .cse2 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse1 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse4) .cse2)))) (and (or .cse0 .cse1 (fp.eq .cse2 .cse3)) (or .cse0 .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2022-11-26 00:11:20,780 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse3 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse4) .cse4))) (let ((.cse2 (fp.div c_currentRoundingMode .cse3 .cse4))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse2 .cse4) .cse2))) (.cse1 (fp.eq .cse2 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))) (and (or .cse0 .cse1) (or .cse0 .cse1 (fp.eq .cse2 .cse3)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4)) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2022-11-26 00:11:22,873 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse4))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse4))) (let ((.cse2 (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse4) .cse0))) (.cse3 (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))) (and (or (fp.eq .cse0 .cse1) .cse2 .cse3) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4) .cse4)) (or .cse2 .cse3) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from false [2022-11-26 00:11:25,015 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse4))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse4))) (let ((.cse2 (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse4) .cse0))) (.cse3 (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))) (and (or (fp.eq .cse0 .cse1) .cse2 .cse3) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4) .cse4)) (or .cse2 .cse3) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2022-11-26 00:11:27,118 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse4))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode .cse1 .cse4) .cse1))) (.cse2 (fp.eq .cse1 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse3 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse4) .cse4))) (and (or .cse0 (fp.eq .cse1 |c_ULTIMATE.start_main_~x1~0#1|) .cse2 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode .cse3 .cse4)) (or .cse0 .cse2) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (= |c_ULTIMATE.start_main_~x~0#1| .cse3) (= c_currentRoundingMode roundNearestTiesToEven))))) is different from true [2022-11-26 00:11:29,322 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse3) |c_ULTIMATE.start_main_~x1~0#1|))) (.cse1 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) (.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse3) .cse3) .cse3))) (and (or .cse0 .cse1) (= |c_ULTIMATE.start_main_~x~0#1| .cse2) (or .cse0 (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) .cse1) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse3)) (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode .cse2 .cse3))))) is different from false [2022-11-26 00:12:02,389 WARN L233 SmtUtils]: Spent 17.32s on a formula simplification. DAG size of input: 23 DAG size of output: 17 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:12:05,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:07,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:25,318 WARN L233 SmtUtils]: Spent 9.09s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:12:28,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:30,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:46,899 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:12:48,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:12:50,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:06,993 WARN L233 SmtUtils]: Spent 9.46s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:13:08,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:10,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:12,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-26 00:13:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:13,156 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-11-26 00:13:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:13:13,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:13:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:13,193 INFO L225 Difference]: With dead ends: 24 [2022-11-26 00:13:13,193 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 00:13:13,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 19 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 184.3s TimeCoverageRelationStatistics Valid=89, Invalid=122, Unknown=47, NotChecked=798, Total=1056 [2022-11-26 00:13:13,194 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:13,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 9 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 6 Unknown, 179 Unchecked, 24.2s Time] [2022-11-26 00:13:13,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 00:13:13,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2022-11-26 00:13:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-26 00:13:13,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-11-26 00:13:13,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:13,198 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-26 00:13:13,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:13,198 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-26 00:13:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:13:13,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:13,198 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:13,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:13,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-11-26 00:13:13,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:13,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:13,800 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:13,801 INFO L85 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 3 times [2022-11-26 00:13:13,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:13:13,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728248342] [2022-11-26 00:13:13,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:13:13,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:13:13,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:13:13,803 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:13:13,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-26 00:13:15,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:13:15,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:15,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:13:15,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:20,918 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-11-26 00:13:26,926 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-11-26 00:13:34,225 WARN L859 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0)))) is different from true [2022-11-26 00:13:54,588 WARN L233 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:14:00,267 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:14:03,153 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= |c_ULTIMATE.start_main_~x~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-11-26 00:14:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 14 not checked. [2022-11-26 00:14:07,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:19,138 WARN L859 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) is different from true [2022-11-26 00:14:34,043 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2022-11-26 00:14:36,134 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 |c_ULTIMATE.start_main_~x1~0#1|) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2022-11-26 00:14:51,665 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))))) is different from false [2022-11-26 00:14:53,815 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))))) is different from true [2022-11-26 00:15:10,022 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse2))))) is different from false [2022-11-26 00:15:12,207 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse2))))) is different from true [2022-11-26 00:15:29,096 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2) .cse2) .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))))) is different from false [2022-11-26 00:15:31,370 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse1 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse2) .cse2) .cse2))) (let ((.cse0 (fp.div c_currentRoundingMode .cse1 .cse2))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (fp.eq .cse0 .cse1) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse2) .cse0)))))) is different from true [2022-11-26 00:15:41,394 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:15:46,420 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:15:48,745 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))))) is different from false [2022-11-26 00:15:51,037 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse2 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1))) (let ((.cse0 (fp.div c_currentRoundingMode .cse2 .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))))))) is different from true [2022-11-26 00:15:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2022-11-26 00:15:51,037 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:15:51,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728248342] [2022-11-26 00:15:51,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728248342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:51,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [110203759] [2022-11-26 00:15:51,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:15:51,038 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:15:51,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:15:51,040 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:15:51,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-26 00:15:53,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:15:53,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:53,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:15:53,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:33,272 WARN L233 SmtUtils]: Spent 7.38s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:16:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 14 not checked. [2022-11-26 00:16:42,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:50,731 WARN L859 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) is different from true [2022-11-26 00:17:01,355 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2022-11-26 00:17:03,447 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2022-11-26 00:17:14,506 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2022-11-26 00:17:26,973 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2022-11-26 00:17:29,182 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2022-11-26 00:17:41,296 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2022-11-26 00:17:43,564 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2022-11-26 00:17:55,618 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2022-11-26 00:17:57,919 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1) .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2022-11-26 00:17:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2022-11-26 00:17:57,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [110203759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:57,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153442044] [2022-11-26 00:17:57,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:17:57,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:57,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:57,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:57,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27413c8f-efc1-4473-9155-ee37d77193aa/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:18:27,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:18:27,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:18:27,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:18:27,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:50,005 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:18:59,927 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:19:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 14 not checked. [2022-11-26 00:19:03,794 INFO L328 TraceCheckSpWp]: Computing backward predicates...