./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7 --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 a237c0c5e1786112b53bae8b5da7db35eee15483563deacdbe79fcac787d5645 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:31:03,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:31:03,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:31:03,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:31:03,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:31:03,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:31:03,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:31:03,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:31:03,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:31:03,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:31:03,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:31:03,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:31:03,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:31:03,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:31:03,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:31:03,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:31:03,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:31:03,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:31:03,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:31:03,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:31:03,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:31:03,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:31:03,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:31:03,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:31:03,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:31:03,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:31:03,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:31:03,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:31:03,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:31:03,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:31:03,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:31:03,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:31:03,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:31:03,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:31:03,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:31:03,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:31:03,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:31:03,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:31:03,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:31:03,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:31:03,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:31:03,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:31:03,450 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:31:03,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:31:03,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:31:03,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:31:03,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:31:03,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:31:03,451 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:31:03,452 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:31:03,452 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:31:03,452 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:31:03,452 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:31:03,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:31:03,453 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:31:03,453 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:31:03,453 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:31:03,453 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:31:03,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:31:03,454 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:31:03,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:31:03,454 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:31:03,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:31:03,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:31:03,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:31:03,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:31:03,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:31:03,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:31:03,456 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:31:03,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:31:03,456 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:31:03,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:31:03,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:31:03,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:31:03,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:31:03,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:31:03,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:31:03,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:31:03,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:31:03,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:31:03,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:31:03,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:31:03,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:31:03,459 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a237c0c5e1786112b53bae8b5da7db35eee15483563deacdbe79fcac787d5645 [2021-11-25 18:31:03,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:31:03,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:31:03,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:31:03,724 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:31:03,725 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:31:03,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-11-25 18:31:03,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/data/46ed85fe9/af3d2a6cd1af44368c4100239bb35583/FLAG42fa4e896 [2021-11-25 18:31:04,248 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:31:04,248 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-11-25 18:31:04,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/data/46ed85fe9/af3d2a6cd1af44368c4100239bb35583/FLAG42fa4e896 [2021-11-25 18:31:04,770 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/data/46ed85fe9/af3d2a6cd1af44368c4100239bb35583 [2021-11-25 18:31:04,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:31:04,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:31:04,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:31:04,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:31:04,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:31:04,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:31:04" (1/1) ... [2021-11-25 18:31:04,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad26e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:04, skipping insertion in model container [2021-11-25 18:31:04,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:31:04" (1/1) ... [2021-11-25 18:31:04,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:31:04,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:31:04,987 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-11-25 18:31:04,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:31:05,001 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:31:05,020 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-11-25 18:31:05,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:31:05,036 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:31:05,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05 WrapperNode [2021-11-25 18:31:05,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:31:05,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:31:05,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:31:05,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:31:05,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (1/1) ... [2021-11-25 18:31:05,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (1/1) ... [2021-11-25 18:31:05,093 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2021-11-25 18:31:05,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:31:05,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:31:05,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:31:05,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:31:05,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (1/1) ... [2021-11-25 18:31:05,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (1/1) ... [2021-11-25 18:31:05,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (1/1) ... [2021-11-25 18:31:05,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (1/1) ... [2021-11-25 18:31:05,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (1/1) ... [2021-11-25 18:31:05,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (1/1) ... [2021-11-25 18:31:05,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (1/1) ... [2021-11-25 18:31:05,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:31:05,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:31:05,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:31:05,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:31:05,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (1/1) ... [2021-11-25 18:31:05,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:31:05,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:31:05,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:31:05,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:31:05,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:31:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:31:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:31:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-25 18:31:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-25 18:31:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-25 18:31:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:31:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:31:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:31:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:31:05,320 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:31:05,322 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:31:05,489 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:31:05,558 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:31:05,559 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 18:31:05,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:31:05 BoogieIcfgContainer [2021-11-25 18:31:05,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:31:05,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:31:05,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:31:05,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:31:05,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:31:04" (1/3) ... [2021-11-25 18:31:05,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df0168f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:31:05, skipping insertion in model container [2021-11-25 18:31:05,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:05" (2/3) ... [2021-11-25 18:31:05,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df0168f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:31:05, skipping insertion in model container [2021-11-25 18:31:05,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:31:05" (3/3) ... [2021-11-25 18:31:05,570 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2021-11-25 18:31:05,575 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:31:05,576 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:31:05,643 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:31:05,668 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:31:05,668 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:31:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:31:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:31:05,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:05,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:05,693 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:05,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1279125101, now seen corresponding path program 1 times [2021-11-25 18:31:05,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:05,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010223063] [2021-11-25 18:31:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:05,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:05,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:05,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010223063] [2021-11-25 18:31:05,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010223063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:05,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:05,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:31:05,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188215537] [2021-11-25 18:31:05,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:05,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:31:05,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:05,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:31:05,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:31:05,900 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:05,933 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-11-25 18:31:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:31:05,936 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-25 18:31:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:05,943 INFO L225 Difference]: With dead ends: 40 [2021-11-25 18:31:05,943 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 18:31:05,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:31:05,950 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:05,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:31:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 18:31:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 18:31:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:31:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-25 18:31:05,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-11-25 18:31:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:05,987 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-25 18:31:05,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-25 18:31:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:31:05,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:05,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:05,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:31:05,990 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:05,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1908558311, now seen corresponding path program 1 times [2021-11-25 18:31:05,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:05,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536840014] [2021-11-25 18:31:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:05,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:31:06,042 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:31:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:31:06,094 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:31:06,094 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:31:06,096 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:31:06,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:31:06,101 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-25 18:31:06,104 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:31:06,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:31:06 BoogieIcfgContainer [2021-11-25 18:31:06,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:31:06,141 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:31:06,141 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:31:06,141 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:31:06,141 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:31:05" (3/4) ... [2021-11-25 18:31:06,144 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 18:31:06,144 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:31:06,146 INFO L158 Benchmark]: Toolchain (without parser) took 1364.27ms. Allocated memory is still 100.7MB. Free memory was 66.4MB in the beginning and 77.1MB in the end (delta: -10.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:31:06,147 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 75.5MB. Free memory was 48.7MB in the beginning and 48.7MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:31:06,149 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.73ms. Allocated memory is still 100.7MB. Free memory was 66.1MB in the beginning and 75.9MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:31:06,153 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.49ms. Allocated memory is still 100.7MB. Free memory was 75.9MB in the beginning and 74.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:31:06,155 INFO L158 Benchmark]: Boogie Preprocessor took 27.29ms. Allocated memory is still 100.7MB. Free memory was 74.4MB in the beginning and 73.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:31:06,156 INFO L158 Benchmark]: RCFGBuilder took 439.94ms. Allocated memory is still 100.7MB. Free memory was 72.7MB in the beginning and 58.8MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 18:31:06,159 INFO L158 Benchmark]: TraceAbstraction took 576.51ms. Allocated memory is still 100.7MB. Free memory was 58.1MB in the beginning and 77.7MB in the end (delta: -19.7MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. [2021-11-25 18:31:06,159 INFO L158 Benchmark]: Witness Printer took 3.69ms. Allocated memory is still 100.7MB. Free memory was 77.7MB in the beginning and 77.1MB in the end (delta: 592.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:31:06,170 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 75.5MB. Free memory was 48.7MB in the beginning and 48.7MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.73ms. Allocated memory is still 100.7MB. Free memory was 66.1MB in the beginning and 75.9MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.49ms. Allocated memory is still 100.7MB. Free memory was 75.9MB in the beginning and 74.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.29ms. Allocated memory is still 100.7MB. Free memory was 74.4MB in the beginning and 73.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 439.94ms. Allocated memory is still 100.7MB. Free memory was 72.7MB in the beginning and 58.8MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 576.51ms. Allocated memory is still 100.7MB. Free memory was 58.1MB in the beginning and 77.7MB in the end (delta: -19.7MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. * Witness Printer took 3.69ms. Allocated memory is still 100.7MB. Free memory was 77.7MB in the beginning and 77.1MB in the end (delta: 592.5kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 81]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L74] float x = -0.0f; [L75] float y = 0.0f; [L77] CALL, EXPR fmax_float(x, y) [L45] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578690] [L22] __uint32_t w; VAL [\old(x)=4286578690, x=4286578690] [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4286578690, \old(y)=0, __fpclassify_float(x)=0, x=4286578690, y=0] [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; VAL [\old(x)=4286578690, \old(y)=0, \result=0, x=4286578690, y=0] [L77] RET, EXPR fmax_float(x, y) [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=0, res == 0.0f && __signbit_float(res) == 0=0, x=4286578690, y=0] [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() VAL [res=0, x=4286578690, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 18 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 18 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 18:31:06,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7 --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 a237c0c5e1786112b53bae8b5da7db35eee15483563deacdbe79fcac787d5645 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:31:08,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:31:08,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:31:08,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:31:08,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:31:08,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:31:08,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:31:08,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:31:08,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:31:08,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:31:08,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:31:08,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:31:08,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:31:08,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:31:08,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:31:08,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:31:08,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:31:08,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:31:08,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:31:08,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:31:08,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:31:08,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:31:08,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:31:08,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:31:08,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:31:08,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:31:08,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:31:08,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:31:08,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:31:08,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:31:08,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:31:08,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:31:08,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:31:08,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:31:08,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:31:08,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:31:08,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:31:08,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:31:08,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:31:08,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:31:08,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:31:08,685 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 18:31:08,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:31:08,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:31:08,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:31:08,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:31:08,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:31:08,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:31:08,730 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:31:08,730 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:31:08,731 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:31:08,731 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:31:08,732 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:31:08,732 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:31:08,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:31:08,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:31:08,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:31:08,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:31:08,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:31:08,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:31:08,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:31:08,735 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:31:08,735 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:31:08,735 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:31:08,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:31:08,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:31:08,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:31:08,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:31:08,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:31:08,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:31:08,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:31:08,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:31:08,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:31:08,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:31:08,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:31:08,738 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:31:08,738 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:31:08,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:31:08,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:31:08,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:31:08,739 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_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a237c0c5e1786112b53bae8b5da7db35eee15483563deacdbe79fcac787d5645 [2021-11-25 18:31:09,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:31:09,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:31:09,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:31:09,158 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:31:09,161 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:31:09,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-11-25 18:31:09,241 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/data/2553065c8/7d3e2e373ea646f2aa8981d4a850d981/FLAG5ca641956 [2021-11-25 18:31:09,810 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:31:09,810 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c [2021-11-25 18:31:09,818 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/data/2553065c8/7d3e2e373ea646f2aa8981d4a850d981/FLAG5ca641956 [2021-11-25 18:31:10,161 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/data/2553065c8/7d3e2e373ea646f2aa8981d4a850d981 [2021-11-25 18:31:10,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:31:10,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:31:10,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:31:10,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:31:10,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:31:10,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d3a533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10, skipping insertion in model container [2021-11-25 18:31:10,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:31:10,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:31:10,373 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-11-25 18:31:10,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:31:10,387 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:31:10,409 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/sv-benchmarks/c/float-newlib/float_req_bl_1252a.c[1897,1910] [2021-11-25 18:31:10,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:31:10,432 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:31:10,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10 WrapperNode [2021-11-25 18:31:10,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:31:10,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:31:10,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:31:10,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:31:10,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,532 INFO L137 Inliner]: procedures = 20, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2021-11-25 18:31:10,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:31:10,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:31:10,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:31:10,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:31:10,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:31:10,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:31:10,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:31:10,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:31:10,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (1/1) ... [2021-11-25 18:31:10,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:31:10,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:31:10,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:31:10,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:31:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:31:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:31:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:31:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-25 18:31:10,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-25 18:31:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 18:31:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:31:10,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:31:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-11-25 18:31:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:31:10,807 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:31:10,809 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:31:11,086 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:31:11,091 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:31:11,091 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 18:31:11,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:31:11 BoogieIcfgContainer [2021-11-25 18:31:11,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:31:11,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:31:11,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:31:11,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:31:11,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:31:10" (1/3) ... [2021-11-25 18:31:11,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d626fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:31:11, skipping insertion in model container [2021-11-25 18:31:11,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:10" (2/3) ... [2021-11-25 18:31:11,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d626fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:31:11, skipping insertion in model container [2021-11-25 18:31:11,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:31:11" (3/3) ... [2021-11-25 18:31:11,107 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2021-11-25 18:31:11,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:31:11,113 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:31:11,165 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:31:11,177 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:31:11,178 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:31:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:31:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:31:11,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:11,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:11,219 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:11,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1826258672, now seen corresponding path program 1 times [2021-11-25 18:31:11,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:31:11,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765227786] [2021-11-25 18:31:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:11,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:31:11,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:31:11,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:31:11,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:31:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:11,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 18:31:11,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:11,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:11,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:31:11,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765227786] [2021-11-25 18:31:11,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765227786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:11,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:11,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:31:11,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61960399] [2021-11-25 18:31:11,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:11,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:31:11,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:31:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:31:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:31:11,442 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:11,462 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2021-11-25 18:31:11,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:31:11,464 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-25 18:31:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:11,471 INFO L225 Difference]: With dead ends: 55 [2021-11-25 18:31:11,472 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 18:31:11,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:31:11,480 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:11,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:31:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 18:31:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-25 18:31:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:31:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-25 18:31:11,531 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 13 [2021-11-25 18:31:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:11,532 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-25 18:31:11,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-25 18:31:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:31:11,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:11,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:11,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:11,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:31:11,753 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:11,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash -503165124, now seen corresponding path program 1 times [2021-11-25 18:31:11,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:31:11,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602039036] [2021-11-25 18:31:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:11,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:31:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:31:11,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:31:11,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:31:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:11,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:31:11,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:11,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:11,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:31:11,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602039036] [2021-11-25 18:31:11,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602039036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:11,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:11,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:31:11,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238422756] [2021-11-25 18:31:11,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:11,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:31:11,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:31:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:31:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:31:11,955 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:11,991 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-11-25 18:31:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:31:11,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-25 18:31:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:11,995 INFO L225 Difference]: With dead ends: 38 [2021-11-25 18:31:11,996 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:31:11,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:31:11,999 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:12,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:31:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:31:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 18:31:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:31:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-11-25 18:31:12,017 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2021-11-25 18:31:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:12,018 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-11-25 18:31:12,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:12,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-11-25 18:31:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:31:12,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:12,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:12,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:12,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:31:12,237 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:12,238 INFO L85 PathProgramCache]: Analyzing trace with hash 25086925, now seen corresponding path program 1 times [2021-11-25 18:31:12,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:31:12,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159978542] [2021-11-25 18:31:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:12,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:31:12,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:31:12,244 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:31:12,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:31:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:12,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:31:12,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:12,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:12,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:31:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159978542] [2021-11-25 18:31:12,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159978542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:12,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:12,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:31:12,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081571383] [2021-11-25 18:31:12,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:12,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:31:12,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:31:12,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:31:12,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:31:12,557 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:12,799 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2021-11-25 18:31:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:31:12,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-25 18:31:12,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:12,809 INFO L225 Difference]: With dead ends: 68 [2021-11-25 18:31:12,809 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 18:31:12,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:31:12,811 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:12,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 107 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2021-11-25 18:31:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 18:31:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2021-11-25 18:31:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:31:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-11-25 18:31:12,816 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 15 [2021-11-25 18:31:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:12,817 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-11-25 18:31:12,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-11-25 18:31:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:31:12,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:12,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:12,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:13,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:31:13,022 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:13,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1897305304, now seen corresponding path program 1 times [2021-11-25 18:31:13,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:31:13,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37747808] [2021-11-25 18:31:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:13,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:31:13,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:31:13,027 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:31:13,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:31:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:13,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:31:13,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:31:13,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:13,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:31:13,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37747808] [2021-11-25 18:31:13,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37747808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:13,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:13,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:31:13,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125592718] [2021-11-25 18:31:13,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:13,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:31:13,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:31:13,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:31:13,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:31:13,347 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:13,603 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-11-25 18:31:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:31:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-25 18:31:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:13,607 INFO L225 Difference]: With dead ends: 57 [2021-11-25 18:31:13,607 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 18:31:13,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:31:13,609 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:13,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 88 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2021-11-25 18:31:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 18:31:13,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-11-25 18:31:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:31:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-25 18:31:13,619 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 16 [2021-11-25 18:31:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:13,619 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-25 18:31:13,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:31:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-25 18:31:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 18:31:13,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:13,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:13,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-25 18:31:13,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:31:13,823 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash -538621340, now seen corresponding path program 1 times [2021-11-25 18:31:13,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:31:13,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359547203] [2021-11-25 18:31:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:13,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:31:13,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:31:13,826 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:31:13,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:31:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:13,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:31:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:31:13,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:13,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:31:13,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359547203] [2021-11-25 18:31:13,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359547203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:13,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:13,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:31:13,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214180891] [2021-11-25 18:31:13,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:13,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:31:13,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:31:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:31:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:31:13,996 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:14,017 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-11-25 18:31:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:31:14,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-25 18:31:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:14,021 INFO L225 Difference]: With dead ends: 38 [2021-11-25 18:31:14,021 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:31:14,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:31:14,024 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:14,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:31:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:31:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 18:31:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:31:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-25 18:31:14,031 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 22 [2021-11-25 18:31:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:14,031 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-25 18:31:14,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-25 18:31:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:31:14,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:14,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:14,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:14,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:31:14,246 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:14,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1336928685, now seen corresponding path program 1 times [2021-11-25 18:31:14,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:31:14,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980717824] [2021-11-25 18:31:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:14,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:31:14,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:31:14,249 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:31:14,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 18:31:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:14,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:31:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:31:14,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:14,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:31:14,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980717824] [2021-11-25 18:31:14,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980717824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:14,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:14,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:31:14,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262641457] [2021-11-25 18:31:14,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:14,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:31:14,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:31:14,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:31:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:31:14,521 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:14,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:14,621 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-11-25 18:31:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:31:14,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-25 18:31:14,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:14,623 INFO L225 Difference]: With dead ends: 43 [2021-11-25 18:31:14,623 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:31:14,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:31:14,625 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:14,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 93 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2021-11-25 18:31:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:31:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 18:31:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:31:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-11-25 18:31:14,631 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 23 [2021-11-25 18:31:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:14,631 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-11-25 18:31:14,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-11-25 18:31:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:31:14,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:14,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:14,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:14,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:31:14,844 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash -636835510, now seen corresponding path program 1 times [2021-11-25 18:31:14,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:31:14,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875600205] [2021-11-25 18:31:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:14,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:31:14,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:31:14,846 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:31:14,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 18:31:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:14,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:31:14,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:31:15,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:15,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:31:15,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875600205] [2021-11-25 18:31:15,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875600205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:15,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:15,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:15,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986335812] [2021-11-25 18:31:15,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:15,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:31:15,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:31:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:31:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:15,003 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:15,010 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-11-25 18:31:15,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:15,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-25 18:31:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:15,012 INFO L225 Difference]: With dead ends: 39 [2021-11-25 18:31:15,012 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:31:15,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:15,014 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:15,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:31:15,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:31:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 18:31:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:31:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-25 18:31:15,020 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 24 [2021-11-25 18:31:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:15,020 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-25 18:31:15,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-25 18:31:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:31:15,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:15,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:15,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:15,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:31:15,237 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash -579577208, now seen corresponding path program 1 times [2021-11-25 18:31:15,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:31:15,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340490843] [2021-11-25 18:31:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:15,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:31:15,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:31:15,239 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:31:15,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 18:31:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:15,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:31:15,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:31:15,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:15,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:31:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340490843] [2021-11-25 18:31:15,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340490843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:15,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:15,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:31:15,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826938901] [2021-11-25 18:31:15,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:15,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:31:15,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:31:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:31:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:31:15,422 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:15,490 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-25 18:31:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:31:15,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-25 18:31:15,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:15,491 INFO L225 Difference]: With dead ends: 41 [2021-11-25 18:31:15,491 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 18:31:15,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:31:15,493 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:15,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 113 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:31:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 18:31:15,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-11-25 18:31:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:31:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-25 18:31:15,498 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 24 [2021-11-25 18:31:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:15,498 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-25 18:31:15,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-25 18:31:15,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:31:15,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:15,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:15,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:15,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:31:15,717 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2025711360, now seen corresponding path program 1 times [2021-11-25 18:31:15,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:31:15,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282597528] [2021-11-25 18:31:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:15,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:31:15,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:31:15,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:31:15,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 18:31:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:15,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:31:15,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:31:15,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:15,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:31:15,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282597528] [2021-11-25 18:31:15,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282597528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:15,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:15,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:31:15,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466360941] [2021-11-25 18:31:15,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:15,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:31:15,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:31:15,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:31:15,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:31:15,952 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:16,175 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-25 18:31:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:31:16,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-25 18:31:16,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:16,177 INFO L225 Difference]: With dead ends: 42 [2021-11-25 18:31:16,177 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 18:31:16,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:31:16,178 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:16,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 81 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-11-25 18:31:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 18:31:16,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-25 18:31:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:31:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-25 18:31:16,182 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 24 [2021-11-25 18:31:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:16,182 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-25 18:31:16,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-25 18:31:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:31:16,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:16,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:16,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:16,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:31:16,394 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:16,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1580504541, now seen corresponding path program 1 times [2021-11-25 18:31:16,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:31:16,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750641002] [2021-11-25 18:31:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:16,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:31:16,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:31:16,396 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:31:16,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 18:31:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 18:31:16,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:31:16,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:16,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:31:16,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750641002] [2021-11-25 18:31:16,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750641002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:16,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:16,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 18:31:16,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072504538] [2021-11-25 18:31:16,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:16,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:31:16,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:31:16,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:31:16,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:31:16,672 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:16,814 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-11-25 18:31:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:31:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-25 18:31:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:16,815 INFO L225 Difference]: With dead ends: 23 [2021-11-25 18:31:16,815 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 18:31:16,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:31:16,816 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:16,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:31:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 18:31:16,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 18:31:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-25 18:31:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 18:31:16,818 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-11-25 18:31:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:16,818 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 18:31:16,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:31:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 18:31:16,818 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 18:31:16,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:31:16,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:17,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:31:17,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 18:31:17,153 INFO L854 garLoopResultBuilder]: At program point L64(lines 55 65) the Hoare annotation is: (and (= |ULTIMATE.start___signbit_float_~x#1| (_ +zero 8 24)) (= |ULTIMATE.start___signbit_float_#res#1| (_ bv0 32)) (= (fp.neg (_ +zero 8 24)) |ULTIMATE.start_fmax_float_~x#1|) (= |ULTIMATE.start_main_~res~0#1| (_ +zero 8 24)) (= (fp ((_ extract 31 31) |ULTIMATE.start___signbit_float_~w~1#1|) ((_ extract 30 23) |ULTIMATE.start___signbit_float_~w~1#1|) ((_ extract 22 0) |ULTIMATE.start___signbit_float_~w~1#1|)) (_ +zero 8 24)) |ULTIMATE.start_main_#t~short11#1| (= |ULTIMATE.start_fmax_float_#res#1| (_ +zero 8 24)) (= |ULTIMATE.start_fmax_float_~y#1| (_ +zero 8 24))) [2021-11-25 18:31:17,153 INFO L861 garLoopResultBuilder]: At program point L85(lines 67 86) the Hoare annotation is: true [2021-11-25 18:31:17,153 INFO L858 garLoopResultBuilder]: For program point L52(line 52) no Hoare annotation was computed. [2021-11-25 18:31:17,153 INFO L858 garLoopResultBuilder]: For program point L52-2(line 52) no Hoare annotation was computed. [2021-11-25 18:31:17,153 INFO L854 garLoopResultBuilder]: At program point L52-3(lines 44 53) the Hoare annotation is: (and (= (fp.neg (_ +zero 8 24)) |ULTIMATE.start_fmax_float_~x#1|) (= |ULTIMATE.start_fmax_float_#res#1| (_ +zero 8 24)) (= |ULTIMATE.start_fmax_float_~y#1| (_ +zero 8 24))) [2021-11-25 18:31:17,154 INFO L858 garLoopResultBuilder]: For program point L81(line 81) no Hoare annotation was computed. [2021-11-25 18:31:17,154 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-25 18:31:17,154 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 18:31:17,154 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-25 18:31:17,154 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 81) no Hoare annotation was computed. [2021-11-25 18:31:17,154 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (and (= (fp.neg (_ +zero 8 24)) |ULTIMATE.start_fmax_float_~x#1|) (= |ULTIMATE.start_fmax_float_~y#1| (_ +zero 8 24))) [2021-11-25 18:31:17,154 INFO L858 garLoopResultBuilder]: For program point L49-1(lines 49 51) no Hoare annotation was computed. [2021-11-25 18:31:17,154 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= (fp.neg (_ +zero 8 24)) |ULTIMATE.start_fmax_float_~x#1|) (= |ULTIMATE.start_fmax_float_~y#1| (_ +zero 8 24))) [2021-11-25 18:31:17,154 INFO L858 garLoopResultBuilder]: For program point L45-1(lines 45 47) no Hoare annotation was computed. [2021-11-25 18:31:17,154 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 18:31:17,155 INFO L858 garLoopResultBuilder]: For program point L58-1(lines 58 62) no Hoare annotation was computed. [2021-11-25 18:31:17,155 INFO L854 garLoopResultBuilder]: At program point L58-2(lines 58 62) the Hoare annotation is: (and (= |ULTIMATE.start___signbit_float_~x#1| (_ +zero 8 24)) (= (fp.neg (_ +zero 8 24)) |ULTIMATE.start_fmax_float_~x#1|) (= |ULTIMATE.start_main_~res~0#1| (_ +zero 8 24)) |ULTIMATE.start_main_#t~short11#1| (= |ULTIMATE.start_fmax_float_#res#1| (_ +zero 8 24)) (= |ULTIMATE.start_fmax_float_~y#1| (_ +zero 8 24))) [2021-11-25 18:31:17,155 INFO L858 garLoopResultBuilder]: For program point L58-3(lines 58 62) no Hoare annotation was computed. [2021-11-25 18:31:17,155 INFO L858 garLoopResultBuilder]: For program point L80(line 80) no Hoare annotation was computed. [2021-11-25 18:31:17,155 INFO L858 garLoopResultBuilder]: For program point L80-2(lines 80 83) no Hoare annotation was computed. [2021-11-25 18:31:17,155 INFO L858 garLoopResultBuilder]: For program point __fpclassify_floatFINAL(lines 21 42) no Hoare annotation was computed. [2021-11-25 18:31:17,155 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 41) no Hoare annotation was computed. [2021-11-25 18:31:17,155 INFO L858 garLoopResultBuilder]: For program point L32(lines 32 41) no Hoare annotation was computed. [2021-11-25 18:31:17,155 INFO L858 garLoopResultBuilder]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2021-11-25 18:31:17,155 INFO L854 garLoopResultBuilder]: At program point L24-2(lines 24 28) the Hoare annotation is: (= |__fpclassify_float_#in~x| __fpclassify_float_~x) [2021-11-25 18:31:17,156 INFO L858 garLoopResultBuilder]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2021-11-25 18:31:17,156 INFO L861 garLoopResultBuilder]: At program point __fpclassify_floatENTRY(lines 21 42) the Hoare annotation is: true [2021-11-25 18:31:17,156 INFO L858 garLoopResultBuilder]: For program point __fpclassify_floatEXIT(lines 21 42) no Hoare annotation was computed. [2021-11-25 18:31:17,156 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 41) no Hoare annotation was computed. [2021-11-25 18:31:17,159 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:17,161 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:31:17,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:31:17 BoogieIcfgContainer [2021-11-25 18:31:17,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:31:17,176 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:31:17,177 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:31:17,177 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:31:17,177 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:31:11" (3/4) ... [2021-11-25 18:31:17,180 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 18:31:17,186 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2021-11-25 18:31:17,196 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-11-25 18:31:17,196 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-11-25 18:31:17,196 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-25 18:31:17,197 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 18:31:17,223 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \old(x) == x [2021-11-25 18:31:17,223 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x && \result == ~Pluszero~LONGDOUBLE()) && y == ~Pluszero~LONGDOUBLE() [2021-11-25 18:31:17,225 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((x == ~Pluszero~LONGDOUBLE() && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && res == ~Pluszero~LONGDOUBLE()) && aux-res == 0.0f && __signbit_float(res) == 0-aux) && \result == ~Pluszero~LONGDOUBLE()) && y == ~Pluszero~LONGDOUBLE() [2021-11-25 18:31:17,225 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((x == ~Pluszero~LONGDOUBLE() && \result == 0bv32) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && res == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && aux-res == 0.0f && __signbit_float(res) == 0-aux) && \result == ~Pluszero~LONGDOUBLE()) && y == ~Pluszero~LONGDOUBLE() [2021-11-25 18:31:17,250 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:31:17,251 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:31:17,251 INFO L158 Benchmark]: Toolchain (without parser) took 7086.28ms. Allocated memory was 71.3MB in the beginning and 86.0MB in the end (delta: 14.7MB). Free memory was 53.4MB in the beginning and 43.3MB in the end (delta: 10.1MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. [2021-11-25 18:31:17,252 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 71.3MB. Free memory is still 52.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:31:17,252 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.14ms. Allocated memory is still 71.3MB. Free memory was 53.3MB in the beginning and 54.7MB in the end (delta: -1.4MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2021-11-25 18:31:17,253 INFO L158 Benchmark]: Boogie Procedure Inliner took 98.59ms. Allocated memory is still 71.3MB. Free memory was 54.7MB in the beginning and 53.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:31:17,253 INFO L158 Benchmark]: Boogie Preprocessor took 67.19ms. Allocated memory is still 71.3MB. Free memory was 53.0MB in the beginning and 51.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:31:17,254 INFO L158 Benchmark]: RCFGBuilder took 492.07ms. Allocated memory is still 71.3MB. Free memory was 51.3MB in the beginning and 40.0MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 18:31:17,255 INFO L158 Benchmark]: TraceAbstraction took 6080.97ms. Allocated memory was 71.3MB in the beginning and 86.0MB in the end (delta: 14.7MB). Free memory was 39.5MB in the beginning and 46.7MB in the end (delta: -7.3MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2021-11-25 18:31:17,255 INFO L158 Benchmark]: Witness Printer took 74.33ms. Allocated memory is still 86.0MB. Free memory was 46.7MB in the beginning and 43.3MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:31:17,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 71.3MB. Free memory is still 52.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.14ms. Allocated memory is still 71.3MB. Free memory was 53.3MB in the beginning and 54.7MB in the end (delta: -1.4MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 98.59ms. Allocated memory is still 71.3MB. Free memory was 54.7MB in the beginning and 53.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.19ms. Allocated memory is still 71.3MB. Free memory was 53.0MB in the beginning and 51.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 492.07ms. Allocated memory is still 71.3MB. Free memory was 51.3MB in the beginning and 40.0MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6080.97ms. Allocated memory was 71.3MB in the beginning and 86.0MB in the end (delta: 14.7MB). Free memory was 39.5MB in the beginning and 46.7MB in the end (delta: -7.3MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * Witness Printer took 74.33ms. Allocated memory is still 86.0MB. Free memory was 46.7MB in the beginning and 43.3MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: 81]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.0s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 173 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 163 mSDsluCounter, 854 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 54 IncrementalHoareTripleChecker+Unchecked, 585 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 179 IncrementalHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 269 mSDtfsCounter, 179 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=3, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 16 PreInvPairs, 23 NumberOfFragments, 80 HoareAnnotationTreeSize, 16 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 36 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 203 NumberOfCodeBlocks, 203 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 193 ConstructedInterpolants, 14 QuantifiedInterpolants, 576 SizeOfPredicates, 46 NumberOfNonLiveVariables, 710 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 36/36 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: ((((((x == ~Pluszero~LONGDOUBLE() && \result == 0bv32) && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && res == ~Pluszero~LONGDOUBLE()) && ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]) == ~Pluszero~LONGDOUBLE()) && aux-res == 0.0f && __signbit_float(res) == 0-aux) && \result == ~Pluszero~LONGDOUBLE()) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x && \result == ~Pluszero~LONGDOUBLE()) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: ((((x == ~Pluszero~LONGDOUBLE() && ~fp.neg~FLOAT(~Pluszero~LONGDOUBLE()) == x) && res == ~Pluszero~LONGDOUBLE()) && aux-res == 0.0f && __signbit_float(res) == 0-aux) && \result == ~Pluszero~LONGDOUBLE()) && y == ~Pluszero~LONGDOUBLE() - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: \old(x) == x RESULT: Ultimate proved your program to be correct! [2021-11-25 18:31:17,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4126c934-f4ef-4c13-9ad0-babdfdd4cf48/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE