./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38561929b5142acce65cab4da64e7c4ae5f17524 .................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38561929b5142acce65cab4da64e7c4ae5f17524 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:22:58,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:22:58,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:22:58,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:22:58,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:22:58,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:22:58,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:22:58,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:22:58,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:22:58,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:22:58,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:22:58,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:22:58,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:22:58,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:22:58,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:22:58,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:22:58,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:22:58,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:22:58,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:22:58,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:22:58,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:22:58,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:22:58,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:22:58,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:22:58,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:22:58,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:22:58,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:22:58,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:22:58,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:22:58,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:22:58,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:22:59,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:22:59,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:22:59,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:22:59,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:22:59,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:22:59,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:22:59,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:22:59,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:22:59,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:22:59,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:22:59,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:22:59,046 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:22:59,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:22:59,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:22:59,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:22:59,049 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:22:59,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:22:59,049 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:22:59,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:22:59,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:22:59,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:22:59,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:22:59,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:22:59,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:22:59,052 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:22:59,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:22:59,053 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:22:59,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:22:59,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:22:59,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:22:59,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:22:59,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:22:59,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:22:59,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:22:59,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:22:59,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:22:59,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:22:59,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:22:59,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:22:59,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2021-10-11 00:22:59,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:22:59,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:22:59,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:22:59,384 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:22:59,385 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:22:59,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-11 00:22:59,471 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/data/0a9e187d6/a5590ca4a67847d48afa24b533a1749e/FLAG55218d7f6 [2021-10-11 00:22:59,919 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:22:59,920 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-11 00:22:59,932 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/data/0a9e187d6/a5590ca4a67847d48afa24b533a1749e/FLAG55218d7f6 [2021-10-11 00:23:00,317 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/data/0a9e187d6/a5590ca4a67847d48afa24b533a1749e [2021-10-11 00:23:00,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:23:00,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:23:00,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:23:00,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:23:00,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:23:00,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b6007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00, skipping insertion in model container [2021-10-11 00:23:00,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:23:00,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:23:00,495 WARN L226 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_94250fb6-f6a2-4129-9c3c-71fe473bb60e/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-11 00:23:00,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:23:00,506 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:23:00,530 WARN L226 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_94250fb6-f6a2-4129-9c3c-71fe473bb60e/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-11 00:23:00,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:23:00,547 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:23:00,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00 WrapperNode [2021-10-11 00:23:00,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:23:00,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:23:00,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:23:00,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:23:00,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:23:00,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:23:00,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:23:00,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:23:00,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (1/1) ... [2021-10-11 00:23:00,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:23:00,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:23:00,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:23:00,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:23:00,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:23:00,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:23:00,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:23:00,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-11 00:23:00,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:23:00,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:23:00,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 00:23:00,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:23:01,055 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:23:01,055 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-11 00:23:01,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:01 BoogieIcfgContainer [2021-10-11 00:23:01,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:23:01,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:23:01,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:23:01,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:23:01,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:23:00" (1/3) ... [2021-10-11 00:23:01,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d986051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:23:01, skipping insertion in model container [2021-10-11 00:23:01,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:00" (2/3) ... [2021-10-11 00:23:01,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d986051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:23:01, skipping insertion in model container [2021-10-11 00:23:01,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:01" (3/3) ... [2021-10-11 00:23:01,065 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-10-11 00:23:01,091 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:23:01,095 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:23:01,106 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:23:01,153 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:23:01,154 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:23:01,154 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:23:01,154 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:23:01,154 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:23:01,154 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:23:01,155 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:23:01,155 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:23:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-10-11 00:23:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 00:23:01,193 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:01,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:01,194 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:01,202 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-11 00:23:01,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:01,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056057004] [2021-10-11 00:23:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:01,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056057004] [2021-10-11 00:23:01,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:01,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:23:01,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710828251] [2021-10-11 00:23:01,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:23:01,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:01,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:23:01,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:23:01,359 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-10-11 00:23:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:01,378 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-11 00:23:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:23:01,379 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-10-11 00:23:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:01,387 INFO L225 Difference]: With dead ends: 62 [2021-10-11 00:23:01,387 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 00:23:01,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:23:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 00:23:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 00:23:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 00:23:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-11 00:23:01,418 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-11 00:23:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:01,419 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-11 00:23:01,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:23:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-11 00:23:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:23:01,420 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:01,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:01,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:23:01,420 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:01,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-11 00:23:01,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:01,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857299191] [2021-10-11 00:23:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:01,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857299191] [2021-10-11 00:23:01,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:01,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:01,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633882240] [2021-10-11 00:23:01,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:01,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:01,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:01,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:01,507 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2021-10-11 00:23:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:01,616 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-10-11 00:23:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:01,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 00:23:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:01,618 INFO L225 Difference]: With dead ends: 53 [2021-10-11 00:23:01,618 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 00:23:01,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:01,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 00:23:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-10-11 00:23:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 00:23:01,626 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-11 00:23:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:01,626 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 00:23:01,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 00:23:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:23:01,627 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:01,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:01,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:23:01,628 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-10-11 00:23:01,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:01,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670561830] [2021-10-11 00:23:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:01,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670561830] [2021-10-11 00:23:01,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:01,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:01,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696692673] [2021-10-11 00:23:01,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:01,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:01,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:01,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:01,687 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-10-11 00:23:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:01,756 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-10-11 00:23:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:01,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 00:23:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:01,760 INFO L225 Difference]: With dead ends: 55 [2021-10-11 00:23:01,760 INFO L226 Difference]: Without dead ends: 46 [2021-10-11 00:23:01,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:01,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-11 00:23:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-10-11 00:23:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 00:23:01,767 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2021-10-11 00:23:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:01,767 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 00:23:01,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 00:23:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 00:23:01,768 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:01,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:01,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 00:23:01,768 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:01,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2021-10-11 00:23:01,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:01,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464684807] [2021-10-11 00:23:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:01,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464684807] [2021-10-11 00:23:01,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:01,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:01,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205036421] [2021-10-11 00:23:01,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:01,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:01,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:01,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:01,858 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-10-11 00:23:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:01,920 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2021-10-11 00:23:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:01,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-10-11 00:23:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:01,922 INFO L225 Difference]: With dead ends: 57 [2021-10-11 00:23:01,922 INFO L226 Difference]: Without dead ends: 48 [2021-10-11 00:23:01,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-11 00:23:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-10-11 00:23:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 00:23:01,928 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2021-10-11 00:23:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:01,929 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 00:23:01,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 00:23:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 00:23:01,930 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:01,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:01,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 00:23:01,930 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2021-10-11 00:23:01,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:01,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116670886] [2021-10-11 00:23:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:02,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116670886] [2021-10-11 00:23:02,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:02,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:02,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414547463] [2021-10-11 00:23:02,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:02,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:02,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:02,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:02,022 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-10-11 00:23:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:02,097 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-10-11 00:23:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:02,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-10-11 00:23:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:02,100 INFO L225 Difference]: With dead ends: 55 [2021-10-11 00:23:02,102 INFO L226 Difference]: Without dead ends: 46 [2021-10-11 00:23:02,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-11 00:23:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-10-11 00:23:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 00:23:02,110 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2021-10-11 00:23:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:02,110 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 00:23:02,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 00:23:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 00:23:02,111 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:02,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:02,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 00:23:02,113 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-11 00:23:02,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:02,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004467879] [2021-10-11 00:23:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:23:02,143 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:23:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:23:02,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:23:02,184 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:23:02,185 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:23:02,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 00:23:02,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:23:02 BoogieIcfgContainer [2021-10-11 00:23:02,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:23:02,219 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:23:02,219 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:23:02,220 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:23:02,220 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:01" (3/4) ... [2021-10-11 00:23:02,223 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 00:23:02,223 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:23:02,225 INFO L168 Benchmark]: Toolchain (without parser) took 1903.53 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 61.3 MB in the beginning and 57.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 26.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:02,226 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 100.7 MB. Free memory was 77.6 MB in the beginning and 77.5 MB in the end (delta: 59.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:02,228 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.72 ms. Allocated memory is still 100.7 MB. Free memory was 61.1 MB in the beginning and 50.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:02,228 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.23 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 50.7 MB in the beginning and 99.9 MB in the end (delta: -49.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:02,229 INFO L168 Benchmark]: Boogie Preprocessor took 79.71 ms. Allocated memory is still 121.6 MB. Free memory was 99.9 MB in the beginning and 98.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:02,230 INFO L168 Benchmark]: RCFGBuilder took 367.56 ms. Allocated memory is still 121.6 MB. Free memory was 98.3 MB in the beginning and 78.9 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:02,231 INFO L168 Benchmark]: TraceAbstraction took 1160.29 ms. Allocated memory is still 121.6 MB. Free memory was 78.3 MB in the beginning and 58.2 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:02,231 INFO L168 Benchmark]: Witness Printer took 4.29 ms. Allocated memory is still 121.6 MB. Free memory was 58.2 MB in the beginning and 57.6 MB in the end (delta: 579.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:02,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 100.7 MB. Free memory was 77.6 MB in the beginning and 77.5 MB in the end (delta: 59.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 225.72 ms. Allocated memory is still 100.7 MB. Free memory was 61.1 MB in the beginning and 50.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.23 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 50.7 MB in the beginning and 99.9 MB in the end (delta: -49.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.71 ms. Allocated memory is still 121.6 MB. Free memory was 99.9 MB in the beginning and 98.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 367.56 ms. Allocated memory is still 121.6 MB. Free memory was 98.3 MB in the beginning and 78.9 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1160.29 ms. Allocated memory is still 121.6 MB. Free memory was 78.3 MB in the beginning and 58.2 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. * Witness Printer took 4.29 ms. Allocated memory is still 121.6 MB. Free memory was 58.2 MB in the beginning and 57.6 MB in the end (delta: 579.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 72]: 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 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:23:04,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:23:04,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:23:04,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:23:04,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:23:04,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:23:04,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:23:04,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:23:04,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:23:04,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:23:04,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:23:04,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:23:04,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:23:04,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:23:04,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:23:04,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:23:04,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:23:04,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:23:04,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:23:04,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:23:04,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:23:04,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:23:04,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:23:04,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:23:04,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:23:04,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:23:04,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:23:04,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:23:04,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:23:04,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:23:04,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:23:04,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:23:04,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:23:04,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:23:04,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:23:04,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:23:04,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:23:04,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:23:04,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:23:04,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:23:04,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:23:04,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-11 00:23:04,942 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:23:04,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:23:04,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:23:04,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:23:04,945 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:23:04,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:23:04,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:23:04,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:23:04,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:23:04,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:23:04,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:23:04,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:23:04,948 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 00:23:04,948 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 00:23:04,949 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:23:04,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:23:04,949 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:23:04,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:23:04,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:23:04,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:23:04,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:23:04,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:23:04,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:23:04,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:23:04,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:23:04,951 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-11 00:23:04,951 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 00:23:04,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:23:04,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:23:04,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 00:23:04,952 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_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2021-10-11 00:23:05,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:23:05,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:23:05,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:23:05,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:23:05,434 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:23:05,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-11 00:23:05,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/data/1bb072046/a2842aa49200448598ee8938f51de4fe/FLAG4225875a5 [2021-10-11 00:23:06,109 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:23:06,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-11 00:23:06,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/data/1bb072046/a2842aa49200448598ee8938f51de4fe/FLAG4225875a5 [2021-10-11 00:23:06,463 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/data/1bb072046/a2842aa49200448598ee8938f51de4fe [2021-10-11 00:23:06,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:23:06,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:23:06,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:23:06,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:23:06,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:23:06,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1acea45d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06, skipping insertion in model container [2021-10-11 00:23:06,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:23:06,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:23:06,666 WARN L226 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_94250fb6-f6a2-4129-9c3c-71fe473bb60e/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-11 00:23:06,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:23:06,681 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:23:06,705 WARN L226 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_94250fb6-f6a2-4129-9c3c-71fe473bb60e/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-11 00:23:06,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:23:06,723 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:23:06,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06 WrapperNode [2021-10-11 00:23:06,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:23:06,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:23:06,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:23:06,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:23:06,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:23:06,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:23:06,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:23:06,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:23:06,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (1/1) ... [2021-10-11 00:23:06,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:23:06,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:23:06,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:23:06,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:23:06,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:23:06,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 00:23:06,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:23:06,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-11 00:23:06,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:23:06,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:23:06,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-11 00:23:06,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:23:07,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:23:07,328 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-11 00:23:07,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:07 BoogieIcfgContainer [2021-10-11 00:23:07,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:23:07,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:23:07,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:23:07,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:23:07,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:23:06" (1/3) ... [2021-10-11 00:23:07,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3dc46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:23:07, skipping insertion in model container [2021-10-11 00:23:07,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:06" (2/3) ... [2021-10-11 00:23:07,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3dc46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:23:07, skipping insertion in model container [2021-10-11 00:23:07,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:07" (3/3) ... [2021-10-11 00:23:07,349 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-10-11 00:23:07,362 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:23:07,365 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:23:07,392 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:23:07,433 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:23:07,433 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:23:07,433 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:23:07,433 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:23:07,433 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:23:07,433 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:23:07,434 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:23:07,434 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:23:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-10-11 00:23:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 00:23:07,469 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:07,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:07,470 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:07,475 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-11 00:23:07,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:07,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541217874] [2021-10-11 00:23:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 00:23:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:07,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 00:23:07,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:07,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:07,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541217874] [2021-10-11 00:23:07,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:07,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:23:07,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722215338] [2021-10-11 00:23:07,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:23:07,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:07,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:23:07,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:23:07,655 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-10-11 00:23:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:07,679 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-11 00:23:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:23:07,681 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-10-11 00:23:07,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:07,693 INFO L225 Difference]: With dead ends: 62 [2021-10-11 00:23:07,694 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 00:23:07,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:23:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 00:23:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 00:23:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 00:23:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-11 00:23:07,741 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-11 00:23:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:07,741 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-11 00:23:07,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:23:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-11 00:23:07,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:23:07,743 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:07,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:07,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 00:23:07,961 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:07,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-11 00:23:07,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:07,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74417084] [2021-10-11 00:23:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 00:23:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:23:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:08,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:08,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74417084] [2021-10-11 00:23:08,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:08,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:08,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639298691] [2021-10-11 00:23:08,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:08,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:08,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:08,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:08,172 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2021-10-11 00:23:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:08,270 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-10-11 00:23:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:08,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 00:23:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:08,274 INFO L225 Difference]: With dead ends: 53 [2021-10-11 00:23:08,274 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 00:23:08,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 00:23:08,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-10-11 00:23:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 00:23:08,290 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-11 00:23:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:08,290 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 00:23:08,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 00:23:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:23:08,293 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:08,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:08,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 00:23:08,508 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:08,509 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-10-11 00:23:08,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:08,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084098524] [2021-10-11 00:23:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 00:23:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:23:08,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:08,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:08,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084098524] [2021-10-11 00:23:08,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:08,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:08,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787821102] [2021-10-11 00:23:08,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:08,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:08,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:08,700 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-10-11 00:23:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:08,786 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2021-10-11 00:23:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:08,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 00:23:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:08,788 INFO L225 Difference]: With dead ends: 50 [2021-10-11 00:23:08,788 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 00:23:08,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 00:23:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-11 00:23:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 00:23:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-11 00:23:08,804 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 12 [2021-10-11 00:23:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:08,804 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-11 00:23:08,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-11 00:23:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 00:23:08,805 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:08,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:09,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 00:23:09,018 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:09,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:09,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-11 00:23:09,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:09,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170294099] [2021-10-11 00:23:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 00:23:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:09,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:23:09,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:09,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:09,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170294099] [2021-10-11 00:23:09,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:09,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:09,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718578644] [2021-10-11 00:23:09,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:09,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:09,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:09,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:09,135 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2021-10-11 00:23:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:09,203 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-10-11 00:23:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:09,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-10-11 00:23:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:09,205 INFO L225 Difference]: With dead ends: 48 [2021-10-11 00:23:09,206 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 00:23:09,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 00:23:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-10-11 00:23:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 00:23:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-11 00:23:09,214 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-10-11 00:23:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:09,214 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-11 00:23:09,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-11 00:23:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 00:23:09,216 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:09,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:09,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2021-10-11 00:23:09,429 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:09,430 INFO L82 PathProgramCache]: Analyzing trace with hash 874935118, now seen corresponding path program 1 times [2021-10-11 00:23:09,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:09,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567989628] [2021-10-11 00:23:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2021-10-11 00:23:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:23:09,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:09,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:09,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567989628] [2021-10-11 00:23:09,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:09,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:23:09,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578894484] [2021-10-11 00:23:09,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:23:09,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:09,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:23:09,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:09,592 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2021-10-11 00:23:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:09,665 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-11 00:23:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:23:09,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-10-11 00:23:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:09,667 INFO L225 Difference]: With dead ends: 39 [2021-10-11 00:23:09,667 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 00:23:09,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:23:09,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 00:23:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-11 00:23:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 00:23:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-10-11 00:23:09,672 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2021-10-11 00:23:09,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:09,673 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-10-11 00:23:09,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:23:09,673 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-10-11 00:23:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:23:09,674 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:09,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:09,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2021-10-11 00:23:09,891 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:09,892 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-11 00:23:09,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:09,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847751808] [2021-10-11 00:23:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 00:23:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:23:09,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:10,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:10,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847751808] [2021-10-11 00:23:10,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:10,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:23:10,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529392105] [2021-10-11 00:23:10,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:23:10,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:10,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:23:10,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:23:10,026 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2021-10-11 00:23:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:10,034 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-10-11 00:23:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:23:10,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-10-11 00:23:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:10,035 INFO L225 Difference]: With dead ends: 33 [2021-10-11 00:23:10,035 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 00:23:10,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:23:10,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 00:23:10,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-11 00:23:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 00:23:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-10-11 00:23:10,040 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2021-10-11 00:23:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:10,040 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-10-11 00:23:10,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:23:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-10-11 00:23:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:23:10,041 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:10,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:10,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2021-10-11 00:23:10,260 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-11 00:23:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:10,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338086019] [2021-10-11 00:23:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2021-10-11 00:23:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 00:23:10,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:10,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:10,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338086019] [2021-10-11 00:23:10,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:10,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 00:23:10,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178173091] [2021-10-11 00:23:10,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:23:10,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:10,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:23:10,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:23:10,406 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2021-10-11 00:23:10,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:10,481 INFO L93 Difference]: Finished difference Result 26 states and 25 transitions. [2021-10-11 00:23:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:23:10,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-10-11 00:23:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:10,483 INFO L225 Difference]: With dead ends: 26 [2021-10-11 00:23:10,483 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 00:23:10,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:23:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 00:23:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-11 00:23:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 00:23:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2021-10-11 00:23:10,487 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 18 [2021-10-11 00:23:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:10,488 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2021-10-11 00:23:10,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:23:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2021-10-11 00:23:10,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 00:23:10,489 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:10,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:10,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2021-10-11 00:23:10,704 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:10,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-11 00:23:10,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:10,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581590814] [2021-10-11 00:23:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2021-10-11 00:23:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:23:10,811 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:23:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:23:10,877 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:23:10,949 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-11 00:23:10,950 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:23:11,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2021-10-11 00:23:11,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:23:11 BoogieIcfgContainer [2021-10-11 00:23:11,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:23:11,201 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:23:11,201 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:23:11,201 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:23:11,201 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:07" (3/4) ... [2021-10-11 00:23:11,203 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:23:11,267 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94250fb6-f6a2-4129-9c3c-71fe473bb60e/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:23:11,268 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:23:11,269 INFO L168 Benchmark]: Toolchain (without parser) took 4801.18 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 54.1 MB in the beginning and 45.5 MB in the end (delta: 8.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:11,274 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 73.4 MB. Free memory is still 53.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:11,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.88 ms. Allocated memory is still 73.4 MB. Free memory was 54.0 MB in the beginning and 42.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:11,275 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.08 ms. Allocated memory is still 73.4 MB. Free memory was 56.7 MB in the beginning and 54.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:11,275 INFO L168 Benchmark]: Boogie Preprocessor took 34.71 ms. Allocated memory is still 73.4 MB. Free memory was 54.9 MB in the beginning and 53.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:11,276 INFO L168 Benchmark]: RCFGBuilder took 486.51 ms. Allocated memory is still 73.4 MB. Free memory was 53.4 MB in the beginning and 53.2 MB in the end (delta: 151.8 kB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:11,277 INFO L168 Benchmark]: TraceAbstraction took 3868.87 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 52.9 MB in the beginning and 48.4 MB in the end (delta: 4.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:11,279 INFO L168 Benchmark]: Witness Printer took 67.16 ms. Allocated memory is still 88.1 MB. Free memory was 48.4 MB in the beginning and 45.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:11,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 73.4 MB. Free memory is still 53.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.88 ms. Allocated memory is still 73.4 MB. Free memory was 54.0 MB in the beginning and 42.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.08 ms. Allocated memory is still 73.4 MB. Free memory was 56.7 MB in the beginning and 54.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.71 ms. Allocated memory is still 73.4 MB. Free memory was 54.9 MB in the beginning and 53.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 486.51 ms. Allocated memory is still 73.4 MB. Free memory was 53.4 MB in the beginning and 53.2 MB in the end (delta: 151.8 kB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3868.87 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 52.9 MB in the beginning and 48.4 MB in the end (delta: 4.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. * Witness Printer took 67.16 ms. Allocated memory is still 88.1 MB. Free memory was 48.4 MB in the beginning and 45.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 72]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L38] COND FALSE !(__fpclassify_float(x) == 0) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] EXPR x < y ? x : y [L43] return x < y ? x : y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L47] __uint32_t w; [L50] ieee_float_shape_type gf_u; [L51] gf_u.value = (x) [L52] EXPR gf_u.word [L52] (w) = gf_u.word [L55] return (w & 0x80000000) != 0; [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 118 SDslu, 217 SDs, 0 SdLazy, 82 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 3941 SizeOfPredicates, 27 NumberOfNonLiveVariables, 403 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...