./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt --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 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt --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 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.1-dev-4e77c04 [2021-10-13 00:34:41,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:34:41,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:34:41,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:34:41,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:34:41,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:34:41,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:34:41,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:34:41,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:34:41,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:34:41,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:34:41,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:34:41,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:34:41,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:34:41,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:34:41,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:34:41,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:34:41,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:34:41,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:34:41,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:34:41,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:34:41,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:34:41,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:34:41,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:34:41,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:34:41,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:34:41,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:34:41,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:34:41,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:34:41,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:34:41,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:34:41,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:34:41,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:34:41,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:34:42,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:34:42,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:34:42,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:34:42,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:34:42,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:34:42,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:34:42,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:34:42,006 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:34:42,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:34:42,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:34:42,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:34:42,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:34:42,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:34:42,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:34:42,075 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:34:42,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:34:42,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:34:42,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:34:42,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:34:42,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:34:42,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:34:42,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:34:42,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:34:42,078 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:34:42,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:34:42,079 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:34:42,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:34:42,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:34:42,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:34:42,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:34:42,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:34:42,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:34:42,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:34:42,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:34:42,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:34:42,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:34:42,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:34:42,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:34:42,084 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_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 [2021-10-13 00:34:42,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:34:42,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:34:42,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:34:42,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:34:42,429 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:34:42,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-13 00:34:42,510 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/data/c3bacc5e8/c44b9331b866453da95ae985dfae3be3/FLAGbef4c23e9 [2021-10-13 00:34:43,084 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:34:43,087 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-13 00:34:43,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/data/c3bacc5e8/c44b9331b866453da95ae985dfae3be3/FLAGbef4c23e9 [2021-10-13 00:34:43,384 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/data/c3bacc5e8/c44b9331b866453da95ae985dfae3be3 [2021-10-13 00:34:43,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:34:43,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:34:43,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:34:43,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:34:43,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:34:43,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d21e072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43, skipping insertion in model container [2021-10-13 00:34:43,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:34:43,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:34:43,653 WARN L228 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_84ee3c81-95b2-4a59-a554-c782ce73a3d7/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-13 00:34:43,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:34:43,667 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:34:43,692 WARN L228 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_84ee3c81-95b2-4a59-a554-c782ce73a3d7/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-13 00:34:43,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:34:43,708 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:34:43,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43 WrapperNode [2021-10-13 00:34:43,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:34:43,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:34:43,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:34:43,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:34:43,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:34:43,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:34:43,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:34:43,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:34:43,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:34:43,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:34:43,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:34:43,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:34:43,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (1/1) ... [2021-10-13 00:34:43,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:34:43,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:34:43,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:34:43,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:34:43,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:34:43,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:34:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-13 00:34:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:34:43,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:34:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:34:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:34:44,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:34:44,223 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 00:34:44,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:34:44 BoogieIcfgContainer [2021-10-13 00:34:44,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:34:44,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:34:44,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:34:44,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:34:44,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:34:43" (1/3) ... [2021-10-13 00:34:44,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be890cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:34:44, skipping insertion in model container [2021-10-13 00:34:44,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:43" (2/3) ... [2021-10-13 00:34:44,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be890cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:34:44, skipping insertion in model container [2021-10-13 00:34:44,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:34:44" (3/3) ... [2021-10-13 00:34:44,235 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-10-13 00:34:44,241 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:34:44,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:34:44,293 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:34:44,301 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:34:44,301 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:34:44,318 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:34:44,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:44,326 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:44,326 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-13 00:34:44,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:34:44,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368379574] [2021-10-13 00:34:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:44,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:34:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:44,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:34:44,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368379574] [2021-10-13 00:34:44,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368379574] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:44,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:44,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:34:44,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081590793] [2021-10-13 00:34:44,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:34:44,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:34:44,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:34:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:34:44,543 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:44,580 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-13 00:34:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:34:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 00:34:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:44,594 INFO L225 Difference]: With dead ends: 62 [2021-10-13 00:34:44,595 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 00:34:44,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:34:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 00:34:44,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 00:34:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-13 00:34:44,669 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-13 00:34:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:44,670 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-13 00:34:44,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-13 00:34:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:34:44,672 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:44,672 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:44,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:34:44,673 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:44,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-13 00:34:44,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:34:44,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103055294] [2021-10-13 00:34:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:44,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:34:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:44,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:34:44,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103055294] [2021-10-13 00:34:44,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103055294] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:44,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:44,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:34:44,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451054245] [2021-10-13 00:34:44,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:34:44,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:34:44,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:34:44,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:34:44,785 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:44,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:44,843 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-10-13 00:34:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:34:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 00:34:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:44,845 INFO L225 Difference]: With dead ends: 53 [2021-10-13 00:34:44,845 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 00:34:44,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:34:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 00:34:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-10-13 00:34:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 00:34:44,854 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-13 00:34:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:44,855 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 00:34:44,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 00:34:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:34:44,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:44,857 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:44,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:34:44,858 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:44,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:44,859 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-10-13 00:34:44,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:34:44,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961006112] [2021-10-13 00:34:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:44,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:34:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:44,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:34:44,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961006112] [2021-10-13 00:34:44,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961006112] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:44,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:44,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:34:44,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062879870] [2021-10-13 00:34:44,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:34:44,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:34:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:34:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:34:44,946 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:45,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:45,009 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-10-13 00:34:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:34:45,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 00:34:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:45,011 INFO L225 Difference]: With dead ends: 55 [2021-10-13 00:34:45,011 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 00:34:45,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:34:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 00:34:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-10-13 00:34:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 00:34:45,024 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2021-10-13 00:34:45,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:45,024 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 00:34:45,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 00:34:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 00:34:45,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:45,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:45,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:34:45,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:45,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2021-10-13 00:34:45,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:34:45,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595385791] [2021-10-13 00:34:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:45,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:34:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:45,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:34:45,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595385791] [2021-10-13 00:34:45,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595385791] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:45,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:45,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:34:45,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493299558] [2021-10-13 00:34:45,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:34:45,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:34:45,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:34:45,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:34:45,173 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:45,243 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2021-10-13 00:34:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:34:45,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 00:34:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:45,249 INFO L225 Difference]: With dead ends: 57 [2021-10-13 00:34:45,250 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 00:34:45,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:34:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 00:34:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-10-13 00:34:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 00:34:45,256 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2021-10-13 00:34:45,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:45,257 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 00:34:45,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 00:34:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:34:45,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:45,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:45,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:34:45,259 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:45,259 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2021-10-13 00:34:45,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:34:45,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537832503] [2021-10-13 00:34:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:45,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:34:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:45,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:34:45,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537832503] [2021-10-13 00:34:45,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537832503] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:45,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:45,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:34:45,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019453944] [2021-10-13 00:34:45,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:34:45,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:34:45,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:34:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:34:45,392 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:45,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:45,453 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-10-13 00:34:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:34:45,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 00:34:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:45,456 INFO L225 Difference]: With dead ends: 55 [2021-10-13 00:34:45,458 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 00:34:45,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:34:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 00:34:45,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-10-13 00:34:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 00:34:45,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2021-10-13 00:34:45,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:45,466 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 00:34:45,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 00:34:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:34:45,468 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:45,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:45,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 00:34:45,468 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-13 00:34:45,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:34:45,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171066964] [2021-10-13 00:34:45,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:45,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:34:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:34:45,497 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:34:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:34:45,548 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:34:45,549 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:34:45,550 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:34:45,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 00:34:45,561 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:34:45,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:34:45 BoogieIcfgContainer [2021-10-13 00:34:45,593 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:34:45,594 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:34:45,594 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:34:45,595 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:34:45,595 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:34:44" (3/4) ... [2021-10-13 00:34:45,599 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:34:45,599 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:34:45,601 INFO L168 Benchmark]: Toolchain (without parser) took 2212.21 ms. Allocated memory is still 94.4 MB. Free memory was 58.7 MB in the beginning and 36.8 MB in the end (delta: 21.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:45,602 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 75.7 MB in the beginning and 75.5 MB in the end (delta: 159.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:34:45,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.72 ms. Allocated memory is still 94.4 MB. Free memory was 58.5 MB in the beginning and 71.5 MB in the end (delta: -13.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:45,604 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.53 ms. Allocated memory is still 94.4 MB. Free memory was 71.5 MB in the beginning and 69.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:45,605 INFO L168 Benchmark]: Boogie Preprocessor took 32.51 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 68.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:45,606 INFO L168 Benchmark]: RCFGBuilder took 438.76 ms. Allocated memory is still 94.4 MB. Free memory was 68.2 MB in the beginning and 55.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:45,606 INFO L168 Benchmark]: TraceAbstraction took 1366.37 ms. Allocated memory is still 94.4 MB. Free memory was 54.8 MB in the beginning and 37.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:45,607 INFO L168 Benchmark]: Witness Printer took 5.23 ms. Allocated memory is still 94.4 MB. Free memory was 37.4 MB in the beginning and 36.8 MB in the end (delta: 544.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:45,612 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 94.4 MB. Free memory was 75.7 MB in the beginning and 75.5 MB in the end (delta: 159.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.72 ms. Allocated memory is still 94.4 MB. Free memory was 58.5 MB in the beginning and 71.5 MB in the end (delta: -13.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.53 ms. Allocated memory is still 94.4 MB. Free memory was 71.5 MB in the beginning and 69.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.51 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 68.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 438.76 ms. Allocated memory is still 94.4 MB. Free memory was 68.2 MB in the beginning and 55.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1366.37 ms. Allocated memory is still 94.4 MB. Free memory was 54.8 MB in the beginning and 37.4 MB in the end (delta: 17.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. * Witness Printer took 5.23 ms. Allocated memory is still 94.4 MB. Free memory was 37.4 MB in the beginning and 36.8 MB in the end (delta: 544.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 81]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1267.5ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 15.8ms, AutomataDifference: 368.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 122.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 58.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.5ms SsaConstructionTime, 170.6ms SatisfiabilityAnalysisTime, 327.1ms InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 71 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 [2021-10-13 00:34:45,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:34:48,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:34:48,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:34:48,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:34:48,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:34:48,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:34:48,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:34:48,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:34:48,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:34:48,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:34:48,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:34:48,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:34:48,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:34:48,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:34:48,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:34:48,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:34:48,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:34:48,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:34:48,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:34:48,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:34:48,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:34:48,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:34:48,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:34:48,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:34:48,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:34:48,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:34:48,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:34:48,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:34:48,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:34:48,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:34:48,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:34:48,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:34:48,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:34:48,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:34:48,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:34:48,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:34:48,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:34:48,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:34:48,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:34:48,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:34:48,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:34:48,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-13 00:34:48,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:34:48,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:34:48,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:34:48,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:34:48,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:34:48,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:34:48,583 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:34:48,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:34:48,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:34:48,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:34:48,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:34:48,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:34:48,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:34:48,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:34:48,587 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 00:34:48,587 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 00:34:48,588 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:34:48,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:34:48,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:34:48,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:34:48,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:34:48,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:34:48,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:34:48,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:34:48,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:34:48,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:34:48,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:34:48,591 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 00:34:48,592 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 00:34:48,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:34:48,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:34:48,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 00:34:48,593 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_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 [2021-10-13 00:34:49,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:34:49,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:34:49,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:34:49,031 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:34:49,032 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:34:49,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-13 00:34:49,113 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/data/dd1399cf0/d71222ce99ff4bd69e04ce8ee8f6255c/FLAGa4ade5b23 [2021-10-13 00:34:49,728 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:34:49,731 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-13 00:34:49,739 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/data/dd1399cf0/d71222ce99ff4bd69e04ce8ee8f6255c/FLAGa4ade5b23 [2021-10-13 00:34:50,093 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/data/dd1399cf0/d71222ce99ff4bd69e04ce8ee8f6255c [2021-10-13 00:34:50,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:34:50,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:34:50,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:34:50,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:34:50,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:34:50,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@415a9023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50, skipping insertion in model container [2021-10-13 00:34:50,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:34:50,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:34:50,386 WARN L228 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_84ee3c81-95b2-4a59-a554-c782ce73a3d7/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-13 00:34:50,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:34:50,407 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:34:50,444 WARN L228 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_84ee3c81-95b2-4a59-a554-c782ce73a3d7/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-13 00:34:50,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:34:50,461 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:34:50,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50 WrapperNode [2021-10-13 00:34:50,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:34:50,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:34:50,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:34:50,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:34:50,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:34:50,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:34:50,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:34:50,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:34:50,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:34:50,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:34:50,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:34:50,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:34:50,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (1/1) ... [2021-10-13 00:34:50,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:34:50,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:34:50,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:34:50,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:34:50,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 00:34:50,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:34:50,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 00:34:50,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:34:50,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:34:50,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-13 00:34:50,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:34:51,029 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:34:51,029 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 00:34:51,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:34:51 BoogieIcfgContainer [2021-10-13 00:34:51,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:34:51,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:34:51,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:34:51,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:34:51,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:34:50" (1/3) ... [2021-10-13 00:34:51,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8c35ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:34:51, skipping insertion in model container [2021-10-13 00:34:51,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:34:50" (2/3) ... [2021-10-13 00:34:51,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8c35ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:34:51, skipping insertion in model container [2021-10-13 00:34:51,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:34:51" (3/3) ... [2021-10-13 00:34:51,040 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-10-13 00:34:51,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:34:51,046 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:34:51,126 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:34:51,133 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:34:51,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:34:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:34:51,156 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:51,157 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:51,157 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:51,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:51,163 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-13 00:34:51,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:34:51,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785650252] [2021-10-13 00:34:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:51,177 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:34:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:34:51,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:34:51,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 00:34:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:51,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 00:34:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:34:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:51,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:34:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:51,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:34:51,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785650252] [2021-10-13 00:34:51,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785650252] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:51,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:51,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 00:34:51,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537870947] [2021-10-13 00:34:51,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:34:51,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:34:51,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:34:51,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:34:51,460 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:51,491 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-13 00:34:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:34:51,493 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 00:34:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:51,505 INFO L225 Difference]: With dead ends: 62 [2021-10-13 00:34:51,505 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 00:34:51,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:34:51,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 00:34:51,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 00:34:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-13 00:34:51,557 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-13 00:34:51,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:51,558 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-13 00:34:51,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:51,559 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-13 00:34:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:34:51,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:51,560 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:51,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:34:51,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:34:51,775 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:51,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-13 00:34:51,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:34:51,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125703187] [2021-10-13 00:34:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:51,779 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:34:51,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:34:51,784 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:34:51,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 00:34:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:34:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:34:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:51,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:34:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:52,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:34:52,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125703187] [2021-10-13 00:34:52,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125703187] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:52,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:52,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:34:52,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677018267] [2021-10-13 00:34:52,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:34:52,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:34:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:34:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:34:52,016 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:52,164 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-13 00:34:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:34:52,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 00:34:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:52,169 INFO L225 Difference]: With dead ends: 68 [2021-10-13 00:34:52,170 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 00:34:52,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:34:52,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 00:34:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-13 00:34:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 00:34:52,186 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-13 00:34:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:52,187 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 00:34:52,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 00:34:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:34:52,188 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:52,188 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:52,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:34:52,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:34:52,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-13 00:34:52,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:34:52,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050739638] [2021-10-13 00:34:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:52,405 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:34:52,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:34:52,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:34:52,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 00:34:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 00:34:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:34:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:52,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:34:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:52,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:34:52,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050739638] [2021-10-13 00:34:52,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050739638] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:52,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:52,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 00:34:52,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303074141] [2021-10-13 00:34:52,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:34:52,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:34:52,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:34:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:34:52,670 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:52,717 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-13 00:34:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:34:52,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 00:34:52,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:52,719 INFO L225 Difference]: With dead ends: 52 [2021-10-13 00:34:52,719 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 00:34:52,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:34:52,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 00:34:52,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 00:34:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-13 00:34:52,725 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-10-13 00:34:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:52,725 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-13 00:34:52,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-13 00:34:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:34:52,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:52,727 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:52,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:34:52,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:34:52,940 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-13 00:34:52,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:34:52,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741900798] [2021-10-13 00:34:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:52,942 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:34:52,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:34:52,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:34:52,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 00:34:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:53,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:34:53,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:34:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:53,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:34:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:53,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:34:53,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741900798] [2021-10-13 00:34:53,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741900798] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:53,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:53,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:34:53,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573274086] [2021-10-13 00:34:53,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:34:53,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:34:53,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:34:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:34:53,188 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:53,262 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-10-13 00:34:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:34:53,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 00:34:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:53,264 INFO L225 Difference]: With dead ends: 61 [2021-10-13 00:34:53,264 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 00:34:53,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:34:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 00:34:53,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-10-13 00:34:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-13 00:34:53,271 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-10-13 00:34:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:53,271 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-13 00:34:53,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-13 00:34:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:34:53,273 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:53,273 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:53,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-13 00:34:53,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:34:53,515 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:53,516 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-13 00:34:53,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:34:53,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590230550] [2021-10-13 00:34:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:53,517 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:34:53,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:34:53,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:34:53,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 00:34:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:53,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:34:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:34:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:53,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:34:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:53,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:34:53,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590230550] [2021-10-13 00:34:53,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590230550] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:53,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:53,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 00:34:53,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421238938] [2021-10-13 00:34:53,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:34:53,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:34:53,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:34:53,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:34:53,971 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:53,985 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-10-13 00:34:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:34:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 00:34:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:53,987 INFO L225 Difference]: With dead ends: 38 [2021-10-13 00:34:53,987 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 00:34:53,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:34:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 00:34:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-13 00:34:53,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-13 00:34:53,992 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-13 00:34:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:53,993 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-13 00:34:53,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-13 00:34:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:34:53,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:53,994 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:54,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:34:54,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:34:54,195 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:54,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:54,196 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-13 00:34:54,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:34:54,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957342288] [2021-10-13 00:34:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:54,197 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:34:54,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:34:54,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:34:54,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 00:34:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:54,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:34:54,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:34:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:54,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:34:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:54,531 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:34:54,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957342288] [2021-10-13 00:34:54,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957342288] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:54,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:54,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-13 00:34:54,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716357468] [2021-10-13 00:34:54,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:34:54,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:34:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:34:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:34:54,534 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:54,656 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-13 00:34:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:34:54,658 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 00:34:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:54,659 INFO L225 Difference]: With dead ends: 40 [2021-10-13 00:34:54,659 INFO L226 Difference]: Without dead ends: 37 [2021-10-13 00:34:54,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:34:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-13 00:34:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-13 00:34:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-13 00:34:54,668 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-10-13 00:34:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:54,669 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-13 00:34:54,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-13 00:34:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:34:54,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:54,670 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:34:54,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:34:54,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:34:54,871 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-13 00:34:54,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:34:54,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979363010] [2021-10-13 00:34:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:54,872 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:34:54,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:34:54,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:34:54,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 00:34:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:34:55,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 00:34:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:34:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:55,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:34:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:34:55,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:34:55,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979363010] [2021-10-13 00:34:55,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979363010] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:34:55,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:34:55,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 00:34:55,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638313713] [2021-10-13 00:34:55,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:34:55,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:34:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:34:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:34:55,286 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:34:55,337 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-13 00:34:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:34:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 00:34:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:34:55,340 INFO L225 Difference]: With dead ends: 43 [2021-10-13 00:34:55,340 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 00:34:55,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:34:55,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 00:34:55,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 00:34:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0) internal successors, (22), 22 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2021-10-13 00:34:55,347 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2021-10-13 00:34:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:34:55,347 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2021-10-13 00:34:55,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:34:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2021-10-13 00:34:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:34:55,349 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:34:55,349 INFO L512 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] [2021-10-13 00:34:55,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:34:55,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:34:55,562 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:34:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:34:55,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-13 00:34:55,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:34:55,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439578057] [2021-10-13 00:34:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:34:55,565 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:34:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:34:55,566 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:34:55,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 00:34:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:34:55,753 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:34:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:34:55,889 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-13 00:34:55,889 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:34:55,890 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:34:55,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:34:56,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:34:56,098 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:34:56,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:34:56 BoogieIcfgContainer [2021-10-13 00:34:56,164 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:34:56,165 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:34:56,165 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:34:56,165 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:34:56,166 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:34:51" (3/4) ... [2021-10-13 00:34:56,167 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:34:56,240 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:34:56,240 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:34:56,243 INFO L168 Benchmark]: Toolchain (without parser) took 6143.32 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 42.9 MB in the beginning and 53.2 MB in the end (delta: -10.3 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:56,243 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 62.9 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:34:56,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.79 ms. Allocated memory is still 62.9 MB. Free memory was 42.7 MB in the beginning and 32.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:56,244 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.10 ms. Allocated memory is still 62.9 MB. Free memory was 31.9 MB in the beginning and 30.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:34:56,245 INFO L168 Benchmark]: Boogie Preprocessor took 70.75 ms. Allocated memory is still 62.9 MB. Free memory was 30.1 MB in the beginning and 28.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:56,245 INFO L168 Benchmark]: RCFGBuilder took 437.31 ms. Allocated memory is still 62.9 MB. Free memory was 28.6 MB in the beginning and 36.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:56,245 INFO L168 Benchmark]: TraceAbstraction took 5131.17 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 35.8 MB in the beginning and 55.9 MB in the end (delta: -20.1 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:56,246 INFO L168 Benchmark]: Witness Printer took 75.15 ms. Allocated memory is still 92.3 MB. Free memory was 55.9 MB in the beginning and 53.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:34:56,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 62.9 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.79 ms. Allocated memory is still 62.9 MB. Free memory was 42.7 MB in the beginning and 32.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.10 ms. Allocated memory is still 62.9 MB. Free memory was 31.9 MB in the beginning and 30.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.75 ms. Allocated memory is still 62.9 MB. Free memory was 30.1 MB in the beginning and 28.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 437.31 ms. Allocated memory is still 62.9 MB. Free memory was 28.6 MB in the beginning and 36.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5131.17 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 35.8 MB in the beginning and 55.9 MB in the end (delta: -20.1 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * Witness Printer took 75.15 ms. Allocated memory is still 92.3 MB. Free memory was 55.9 MB in the beginning and 53.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 81]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L46] COND FALSE !(__fpclassify_float(x) == 0) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L50] COND FALSE !(__fpclassify_float(y) == 0) [L53] EXPR x > y ? x : y [L53] return x > y ? x : y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L57] __uint32_t w; [L60] ieee_float_shape_type gf_u; [L61] gf_u.value = (x) [L62] EXPR gf_u.word [L62] (w) = gf_u.word [L65] return (w & 0x80000000) != 0; [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4972.1ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 15.3ms, AutomataDifference: 560.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 222 SDtfs, 167 SDslu, 326 SDs, 0 SdLazy, 105 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 218.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 172 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 289.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 71.4ms AutomataMinimizationTime, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 90.8ms SsaConstructionTime, 318.9ms SatisfiabilityAnalysisTime, 1434.5ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 501 SizeOfPredicates, 27 NumberOfNonLiveVariables, 413 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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! [2021-10-13 00:34:56,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84ee3c81-95b2-4a59-a554-c782ce73a3d7/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...