./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.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_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/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_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/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_a03bef4d-58aa-41e9-857c-1187a2071b02/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 c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/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_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/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_a03bef4d-58aa-41e9-857c-1187a2071b02/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 c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 00:27:28,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:27:28,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:27:28,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:27:28,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:27:28,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:27:28,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:27:28,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:27:28,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:27:28,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:27:28,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:27:28,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:27:28,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:27:28,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:27:28,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:27:28,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:27:28,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:27:28,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:27:28,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:27:28,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:27:28,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:27:28,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:27:28,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:27:28,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:27:28,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:27:28,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:27:28,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:27:28,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:27:28,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:27:28,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:27:28,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:27:28,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:27:28,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:27:28,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:27:28,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:27:28,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:27:28,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:27:28,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:27:28,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:27:28,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:27:28,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:27:28,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:27:28,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:27:28,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:27:28,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:27:28,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:27:28,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:27:28,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:27:28,957 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:27:28,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:27:28,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:27:28,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:27:28,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:27:28,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:27:28,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:27:28,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:27:28,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:27:28,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:27:28,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:27:28,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:27:28,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:27:28,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:27:28,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:27:28,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:27:28,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:27:28,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:27:28,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:27:28,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:27:28,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:27:28,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:27:28,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:27:28,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:27:28,972 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_a03bef4d-58aa-41e9-857c-1187a2071b02/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 [2021-10-13 00:27:29,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:27:29,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:27:29,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:27:29,407 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:27:29,408 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:27:29,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-13 00:27:29,509 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/data/2df966613/b8b7a6f4ed5c427da4a2ef330cd5c9d9/FLAG0eeefb416 [2021-10-13 00:27:30,066 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:27:30,067 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-13 00:27:30,085 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/data/2df966613/b8b7a6f4ed5c427da4a2ef330cd5c9d9/FLAG0eeefb416 [2021-10-13 00:27:30,395 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/data/2df966613/b8b7a6f4ed5c427da4a2ef330cd5c9d9 [2021-10-13 00:27:30,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:27:30,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:27:30,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:27:30,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:27:30,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:27:30,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d8b5bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30, skipping insertion in model container [2021-10-13 00:27:30,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:27:30,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:27:30,735 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_a03bef4d-58aa-41e9-857c-1187a2071b02/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-13 00:27:30,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:27:30,749 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:27:30,781 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_a03bef4d-58aa-41e9-857c-1187a2071b02/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-13 00:27:30,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:27:30,800 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:27:30,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30 WrapperNode [2021-10-13 00:27:30,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:27:30,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:27:30,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:27:30,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:27:30,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:27:30,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:27:30,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:27:30,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:27:30,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:27:30,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:27:30,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:27:30,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:27:30,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (1/1) ... [2021-10-13 00:27:30,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:27:30,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:27:30,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:27:30,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:27:31,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:27:31,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:27:31,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-13 00:27:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:27:31,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:27:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:27:31,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:27:31,445 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:27:31,445 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 00:27:31,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:27:31 BoogieIcfgContainer [2021-10-13 00:27:31,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:27:31,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:27:31,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:27:31,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:27:31,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:27:30" (1/3) ... [2021-10-13 00:27:31,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c5d682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:27:31, skipping insertion in model container [2021-10-13 00:27:31,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:30" (2/3) ... [2021-10-13 00:27:31,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55c5d682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:27:31, skipping insertion in model container [2021-10-13 00:27:31,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:27:31" (3/3) ... [2021-10-13 00:27:31,460 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2021-10-13 00:27:31,467 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:27:31,467 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:27:31,526 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:27:31,534 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 00:27:31,547 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:27:31,593 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 00:27:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:27:31,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:31,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:27:31,602 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:31,624 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-13 00:27:31,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:27:31,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316880119] [2021-10-13 00:27:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:31,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:27:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:31,920 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 00:27:31,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:27:31,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316880119] [2021-10-13 00:27:31,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316880119] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:31,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:31,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:27:31,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371002148] [2021-10-13 00:27:31,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:27:31,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:27:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:27:31,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:27:31,967 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 00:27:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:31,994 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-13 00:27:31,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:27:31,996 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 00:27:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:32,007 INFO L225 Difference]: With dead ends: 62 [2021-10-13 00:27:32,007 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 00:27:32,012 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 00:27:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 00:27:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 00:27:32,055 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 00:27:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-13 00:27:32,058 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-13 00:27:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:32,059 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-13 00:27:32,060 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 00:27:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-13 00:27:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:27:32,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:32,063 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:27:32,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:27:32,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:32,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:32,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-13 00:27:32,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:27:32,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573082855] [2021-10-13 00:27:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:32,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:27:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:32,217 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 00:27:32,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:27:32,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573082855] [2021-10-13 00:27:32,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573082855] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:32,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:32,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:27:32,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595790895] [2021-10-13 00:27:32,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:27:32,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:27:32,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:27:32,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:27:32,227 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 00:27:32,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:32,342 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-10-13 00:27:32,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:27:32,343 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 00:27:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:32,345 INFO L225 Difference]: With dead ends: 53 [2021-10-13 00:27:32,345 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 00:27:32,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:27:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 00:27:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-10-13 00:27:32,352 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 00:27:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 00:27:32,354 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-13 00:27:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:32,355 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 00:27:32,355 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 00:27:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 00:27:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:27:32,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:32,357 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:27:32,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:27:32,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-10-13 00:27:32,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:27:32,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042988636] [2021-10-13 00:27:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:32,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:27:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:32,441 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 00:27:32,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:27:32,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042988636] [2021-10-13 00:27:32,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042988636] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:32,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:32,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:27:32,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579788637] [2021-10-13 00:27:32,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:27:32,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:27:32,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:27:32,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:27:32,446 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 00:27:32,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:32,534 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-10-13 00:27:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:27:32,535 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 00:27:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:32,537 INFO L225 Difference]: With dead ends: 55 [2021-10-13 00:27:32,538 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 00:27:32,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:27:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 00:27:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-10-13 00:27:32,549 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 00:27:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 00:27:32,556 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2021-10-13 00:27:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:32,558 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 00:27:32,559 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 00:27:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 00:27:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 00:27:32,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:32,563 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:27:32,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:27:32,564 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2021-10-13 00:27:32,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:27:32,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366351165] [2021-10-13 00:27:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:32,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:27:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:32,676 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 00:27:32,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:27:32,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366351165] [2021-10-13 00:27:32,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366351165] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:32,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:32,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:27:32,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876176189] [2021-10-13 00:27:32,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:27:32,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:27:32,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:27:32,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:27:32,689 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 00:27:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:32,769 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2021-10-13 00:27:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:27:32,770 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 00:27:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:32,775 INFO L225 Difference]: With dead ends: 57 [2021-10-13 00:27:32,775 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 00:27:32,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:27:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 00:27:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-10-13 00:27:32,785 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 00:27:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 00:27:32,787 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2021-10-13 00:27:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:32,788 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 00:27:32,788 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 00:27:32,789 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 00:27:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:27:32,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:32,791 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:27:32,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:27:32,792 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2021-10-13 00:27:32,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:27:32,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565762262] [2021-10-13 00:27:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:32,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:27:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:32,878 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 00:27:32,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:27:32,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565762262] [2021-10-13 00:27:32,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565762262] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:32,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:32,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:27:32,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554093531] [2021-10-13 00:27:32,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:27:32,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:27:32,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:27:32,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:27:32,884 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 00:27:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:32,952 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-10-13 00:27:32,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:27:32,953 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 00:27:32,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:32,955 INFO L225 Difference]: With dead ends: 55 [2021-10-13 00:27:32,956 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 00:27:32,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:27:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 00:27:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-10-13 00:27:32,964 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 00:27:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 00:27:32,965 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2021-10-13 00:27:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:32,965 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 00:27:32,966 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 00:27:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 00:27:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:27:32,967 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:32,967 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:27:32,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 00:27:32,968 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:32,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:32,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-13 00:27:32,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:27:32,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987686967] [2021-10-13 00:27:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:32,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:27:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:27:32,998 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:27:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:27:33,060 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:27:33,064 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:27:33,065 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:27:33,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 00:27:33,076 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:27:33,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:27:33 BoogieIcfgContainer [2021-10-13 00:27:33,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:27:33,137 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:27:33,137 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:27:33,138 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:27:33,138 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:27:31" (3/4) ... [2021-10-13 00:27:33,142 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:27:33,142 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:27:33,144 INFO L168 Benchmark]: Toolchain (without parser) took 2742.48 ms. Allocated memory is still 104.9 MB. Free memory was 68.2 MB in the beginning and 51.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:33,145 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 104.9 MB. Free memory was 84.8 MB in the beginning and 84.7 MB in the end (delta: 60.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:27:33,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 399.23 ms. Allocated memory is still 104.9 MB. Free memory was 68.0 MB in the beginning and 79.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:33,146 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.52 ms. Allocated memory is still 104.9 MB. Free memory was 79.6 MB in the beginning and 77.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:33,147 INFO L168 Benchmark]: Boogie Preprocessor took 72.21 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 76.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:27:33,147 INFO L168 Benchmark]: RCFGBuilder took 515.27 ms. Allocated memory is still 104.9 MB. Free memory was 76.3 MB in the beginning and 62.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:33,148 INFO L168 Benchmark]: TraceAbstraction took 1685.76 ms. Allocated memory is still 104.9 MB. Free memory was 62.4 MB in the beginning and 51.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:33,148 INFO L168 Benchmark]: Witness Printer took 5.34 ms. Allocated memory is still 104.9 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:27:33,152 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 104.9 MB. Free memory was 84.8 MB in the beginning and 84.7 MB in the end (delta: 60.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 399.23 ms. Allocated memory is still 104.9 MB. Free memory was 68.0 MB in the beginning and 79.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.52 ms. Allocated memory is still 104.9 MB. Free memory was 79.6 MB in the beginning and 77.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 72.21 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 76.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 515.27 ms. Allocated memory is still 104.9 MB. Free memory was 76.3 MB in the beginning and 62.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1685.76 ms. Allocated memory is still 104.9 MB. Free memory was 62.4 MB in the beginning and 51.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.34 ms. Allocated memory is still 104.9 MB. Free memory is still 51.1 MB. There was no memory consumed. 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: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 81, overapproximation of someUnaryDOUBLEoperation at line 76. Possible FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L33-L34] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L36-L37] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L40-L41] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L44] return 0; [L48] COND TRUE __fpclassify_double(x) == 0 [L49] return y; [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1549.8ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 40.1ms, AutomataDifference: 454.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 163.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.7ms 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: 69.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 33.4ms SsaConstructionTime, 179.2ms SatisfiabilityAnalysisTime, 360.7ms 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 00:27:33,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/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 00:27:36,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:27:36,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:27:36,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:27:36,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:27:36,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:27:36,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:27:36,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:27:36,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:27:36,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:27:36,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:27:36,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:27:36,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:27:36,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:27:36,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:27:36,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:27:36,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:27:36,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:27:36,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:27:36,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:27:36,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:27:36,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:27:36,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:27:36,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:27:36,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:27:36,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:27:36,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:27:36,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:27:36,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:27:36,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:27:36,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:27:36,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:27:36,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:27:36,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:27:36,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:27:36,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:27:36,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:27:36,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:27:36,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:27:36,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:27:36,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:27:36,182 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-13 00:27:36,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:27:36,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:27:36,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:27:36,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:27:36,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:27:36,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:27:36,249 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:27:36,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:27:36,250 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:27:36,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:27:36,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:27:36,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:27:36,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:27:36,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:27:36,253 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 00:27:36,253 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 00:27:36,253 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:27:36,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:27:36,254 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:27:36,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:27:36,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:27:36,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:27:36,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:27:36,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:27:36,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:27:36,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:27:36,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:27:36,256 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 00:27:36,256 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 00:27:36,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:27:36,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:27:36,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 00:27:36,257 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_a03bef4d-58aa-41e9-857c-1187a2071b02/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 [2021-10-13 00:27:36,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:27:36,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:27:36,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:27:36,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:27:36,810 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:27:36,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-13 00:27:36,893 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/data/1f308956a/563bf582ba664887b3b6326f3bcacbb7/FLAG435e591da [2021-10-13 00:27:37,497 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:27:37,502 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-13 00:27:37,512 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/data/1f308956a/563bf582ba664887b3b6326f3bcacbb7/FLAG435e591da [2021-10-13 00:27:37,812 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/data/1f308956a/563bf582ba664887b3b6326f3bcacbb7 [2021-10-13 00:27:37,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:27:37,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:27:37,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:27:37,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:27:37,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:27:37,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:27:37" (1/1) ... [2021-10-13 00:27:37,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2f644e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:37, skipping insertion in model container [2021-10-13 00:27:37,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:27:37" (1/1) ... [2021-10-13 00:27:37,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:27:37,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:27:38,047 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_a03bef4d-58aa-41e9-857c-1187a2071b02/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-13 00:27:38,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:27:38,067 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:27:38,098 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_a03bef4d-58aa-41e9-857c-1187a2071b02/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-13 00:27:38,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:27:38,135 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:27:38,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38 WrapperNode [2021-10-13 00:27:38,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:27:38,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:27:38,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:27:38,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:27:38,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (1/1) ... [2021-10-13 00:27:38,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (1/1) ... [2021-10-13 00:27:38,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:27:38,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:27:38,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:27:38,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:27:38,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (1/1) ... [2021-10-13 00:27:38,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (1/1) ... [2021-10-13 00:27:38,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (1/1) ... [2021-10-13 00:27:38,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (1/1) ... [2021-10-13 00:27:38,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (1/1) ... [2021-10-13 00:27:38,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (1/1) ... [2021-10-13 00:27:38,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (1/1) ... [2021-10-13 00:27:38,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:27:38,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:27:38,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:27:38,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:27:38,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (1/1) ... [2021-10-13 00:27:38,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:27:38,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:27:38,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:27:38,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:27:38,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-13 00:27:38,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 00:27:38,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:27:38,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 00:27:38,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:27:38,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:27:38,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:27:38,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:27:38,770 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-13 00:27:38,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:27:38 BoogieIcfgContainer [2021-10-13 00:27:38,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:27:38,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:27:38,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:27:38,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:27:38,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:27:37" (1/3) ... [2021-10-13 00:27:38,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a155b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:27:38, skipping insertion in model container [2021-10-13 00:27:38,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:27:38" (2/3) ... [2021-10-13 00:27:38,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a155b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:27:38, skipping insertion in model container [2021-10-13 00:27:38,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:27:38" (3/3) ... [2021-10-13 00:27:38,783 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2021-10-13 00:27:38,789 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:27:38,790 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:27:38,863 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:27:38,871 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 00:27:38,872 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:27:38,889 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 00:27:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:27:38,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:38,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:27:38,897 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:38,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:38,904 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-13 00:27:38,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:27:38,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471293627] [2021-10-13 00:27:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:38,941 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:27:38,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:27:38,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:27:38,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 00:27:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 00:27:39,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:27:39,155 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 00:27:39,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:27:39,195 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 00:27:39,196 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:27:39,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471293627] [2021-10-13 00:27:39,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471293627] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:39,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:39,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 00:27:39,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631124986] [2021-10-13 00:27:39,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:27:39,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:27:39,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:27:39,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:27:39,243 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 00:27:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:39,273 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-13 00:27:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:27:39,277 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 00:27:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:39,288 INFO L225 Difference]: With dead ends: 62 [2021-10-13 00:27:39,289 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 00:27:39,292 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 00:27:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 00:27:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 00:27:39,339 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 00:27:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-13 00:27:39,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-13 00:27:39,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:39,345 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-13 00:27:39,345 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 00:27:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-13 00:27:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:27:39,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:39,347 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:27:39,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:27:39,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:27:39,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-13 00:27:39,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:27:39,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118450250] [2021-10-13 00:27:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:39,567 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:27:39,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:27:39,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:27:39,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 00:27:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:39,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:27:39,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:27:39,816 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 00:27:39,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:27:39,868 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 00:27:39,869 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:27:39,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118450250] [2021-10-13 00:27:39,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118450250] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:39,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:39,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:27:39,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759548746] [2021-10-13 00:27:39,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:27:39,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:27:39,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:27:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:27:39,874 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 00:27:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:40,023 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-13 00:27:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:27:40,023 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 00:27:40,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:40,025 INFO L225 Difference]: With dead ends: 68 [2021-10-13 00:27:40,025 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 00:27:40,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:27:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 00:27:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-13 00:27:40,031 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 00:27:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-13 00:27:40,047 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-13 00:27:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:40,048 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-13 00:27:40,048 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 00:27:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-13 00:27:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:27:40,049 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:40,049 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:27:40,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:27:40,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:27:40,268 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-13 00:27:40,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:27:40,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449385638] [2021-10-13 00:27:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:40,271 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:27:40,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:27:40,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:27:40,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 00:27:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:40,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 00:27:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:27:40,637 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 00:27:40,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:27:40,878 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 00:27:40,879 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:27:40,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449385638] [2021-10-13 00:27:40,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449385638] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:40,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:40,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:27:40,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949192419] [2021-10-13 00:27:40,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:27:40,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:27:40,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:27:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:27:40,883 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 00:27:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:41,052 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-13 00:27:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:27:41,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 00:27:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:41,057 INFO L225 Difference]: With dead ends: 52 [2021-10-13 00:27:41,057 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 00:27:41,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:27:41,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 00:27:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-13 00:27:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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 00:27:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-13 00:27:41,069 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2021-10-13 00:27:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:41,070 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-13 00:27:41,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 00:27:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-13 00:27:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:27:41,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:41,073 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:27:41,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:27:41,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:27:41,288 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:41,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:41,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-13 00:27:41,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:27:41,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226049890] [2021-10-13 00:27:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:41,290 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:27:41,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:27:41,294 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:27:41,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 00:27:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:41,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:27:41,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:27:41,513 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 00:27:41,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:27:41,580 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 00:27:41,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:27:41,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226049890] [2021-10-13 00:27:41,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226049890] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:41,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:41,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 00:27:41,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810679404] [2021-10-13 00:27:41,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:27:41,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:27:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:27:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:27:41,585 INFO L87 Difference]: Start difference. First operand 28 states and 35 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 00:27:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:41,670 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-10-13 00:27:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:27:41,672 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 00:27:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:41,673 INFO L225 Difference]: With dead ends: 65 [2021-10-13 00:27:41,674 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 00:27:41,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:27:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 00:27:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2021-10-13 00:27:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 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 00:27:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-10-13 00:27:41,682 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2021-10-13 00:27:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:41,683 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-10-13 00:27:41,683 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 00:27:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-10-13 00:27:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:27:41,684 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:41,685 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 00:27:41,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:27:41,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:27:41,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:41,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:41,902 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-13 00:27:41,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:27:41,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530222540] [2021-10-13 00:27:41,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:41,903 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:27:41,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:27:41,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:27:41,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 00:27:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:27:42,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:27:42,253 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 00:27:42,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:27:42,514 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 00:27:42,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:27:42,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530222540] [2021-10-13 00:27:42,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530222540] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:42,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:42,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 00:27:42,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044836582] [2021-10-13 00:27:42,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:27:42,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:27:42,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:27:42,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:27:42,518 INFO L87 Difference]: Start difference. First operand 30 states and 37 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 00:27:42,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:42,533 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-10-13 00:27:42,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:27:42,535 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 00:27:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:42,536 INFO L225 Difference]: With dead ends: 40 [2021-10-13 00:27:42,536 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 00:27:42,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:27:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 00:27:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-13 00:27:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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 00:27:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-10-13 00:27:42,553 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2021-10-13 00:27:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:42,554 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-10-13 00:27:42,554 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 00:27:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-10-13 00:27:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:27:42,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:42,558 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 00:27:42,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:27:42,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:27:42,774 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:42,775 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-13 00:27:42,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:27:42,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866741700] [2021-10-13 00:27:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:42,776 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:27:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:27:42,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:27:42,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 00:27:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:42,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:27:42,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:27:43,096 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 00:27:43,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:27:43,234 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 00:27:43,235 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:27:43,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866741700] [2021-10-13 00:27:43,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866741700] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:43,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:43,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-13 00:27:43,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450152248] [2021-10-13 00:27:43,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:27:43,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:27:43,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:27:43,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:27:43,238 INFO L87 Difference]: Start difference. First operand 30 states and 36 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 00:27:43,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:43,367 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-13 00:27:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:27:43,368 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 00:27:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:43,368 INFO L225 Difference]: With dead ends: 42 [2021-10-13 00:27:43,369 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 00:27:43,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:27:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 00:27:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-10-13 00:27:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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 00:27:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-10-13 00:27:43,376 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2021-10-13 00:27:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:43,376 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-10-13 00:27:43,376 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 00:27:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-10-13 00:27:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:27:43,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:43,377 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 00:27:43,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:27:43,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:27:43,579 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:43,579 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-13 00:27:43,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:27:43,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090964203] [2021-10-13 00:27:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:43,580 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:27:43,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:27:43,581 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:27:43,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 00:27:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:27:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 00:27:43,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:27:43,952 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 00:27:43,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:27:44,201 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 00:27:44,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:27:44,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090964203] [2021-10-13 00:27:44,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090964203] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:27:44,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:27:44,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 00:27:44,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118380304] [2021-10-13 00:27:44,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:27:44,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:27:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:27:44,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:27:44,205 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 00:27:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:27:44,299 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-10-13 00:27:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:27:44,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 19 [2021-10-13 00:27:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:27:44,304 INFO L225 Difference]: With dead ends: 45 [2021-10-13 00:27:44,304 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 00:27:44,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:27:44,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 00:27:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 00:27:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:27:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-13 00:27:44,316 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2021-10-13 00:27:44,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:27:44,316 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-13 00:27:44,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 00:27:44,317 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-13 00:27:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:27:44,318 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:27:44,318 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 00:27:44,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:27:44,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:27:44,519 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:27:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:27:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-13 00:27:44,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:27:44,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975487241] [2021-10-13 00:27:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:27:44,520 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:27:44,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:27:44,526 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:27:44,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 00:27:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:27:44,773 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:27:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:27:44,990 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-13 00:27:44,991 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:27:44,992 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:27:45,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:27:45,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:27:45,222 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:27:45,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:27:45 BoogieIcfgContainer [2021-10-13 00:27:45,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:27:45,296 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:27:45,296 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:27:45,296 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:27:45,298 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:27:38" (3/4) ... [2021-10-13 00:27:45,301 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:27:45,411 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:27:45,415 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:27:45,417 INFO L168 Benchmark]: Toolchain (without parser) took 7599.75 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 40.6 MB in the beginning and 40.3 MB in the end (delta: 293.6 kB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:45,419 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 60.8 MB. Free memory is still 41.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:27:45,419 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.38 ms. Allocated memory is still 60.8 MB. Free memory was 40.4 MB in the beginning and 29.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:45,420 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.90 ms. Allocated memory is still 60.8 MB. Free memory was 29.3 MB in the beginning and 27.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:45,420 INFO L168 Benchmark]: Boogie Preprocessor took 58.11 ms. Allocated memory is still 60.8 MB. Free memory was 27.4 MB in the beginning and 25.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:45,421 INFO L168 Benchmark]: RCFGBuilder took 502.12 ms. Allocated memory is still 60.8 MB. Free memory was 25.8 MB in the beginning and 31.5 MB in the end (delta: -5.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:45,421 INFO L168 Benchmark]: TraceAbstraction took 6520.75 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 31.1 MB in the beginning and 43.0 MB in the end (delta: -11.9 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:45,422 INFO L168 Benchmark]: Witness Printer took 119.84 ms. Allocated memory is still 75.5 MB. Free memory was 43.0 MB in the beginning and 40.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:27:45,427 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 60.8 MB. Free memory is still 41.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 319.38 ms. Allocated memory is still 60.8 MB. Free memory was 40.4 MB in the beginning and 29.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.90 ms. Allocated memory is still 60.8 MB. Free memory was 29.3 MB in the beginning and 27.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.11 ms. Allocated memory is still 60.8 MB. Free memory was 27.4 MB in the beginning and 25.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 502.12 ms. Allocated memory is still 60.8 MB. Free memory was 25.8 MB in the beginning and 31.5 MB in the end (delta: -5.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6520.75 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 31.1 MB in the beginning and 43.0 MB in the end (delta: -11.9 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. * Witness Printer took 119.84 ms. Allocated memory is still 75.5 MB. Free memory was 43.0 MB in the beginning and 40.3 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: 82]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; [L48] COND FALSE !(__fpclassify_double(x) == 0) [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; [L50] COND FALSE !(__fpclassify_double(y) == 0) [L53] EXPR x < y ? x : y [L53] return x < y ? x : y; [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L57] __uint32_t msw; [L60] ieee_double_shape_type gh_u; [L61] gh_u.value = (x) [L62] EXPR gh_u.parts.msw [L62] (msw) = gh_u.parts.msw [L65] return (msw & 0x80000000) != 0; [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6360.8ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 19.1ms, AutomataDifference: 759.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 234 SDtfs, 249 SDslu, 387 SDs, 0 SdLazy, 128 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 306.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 514.0ms 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: 105.8ms AutomataMinimizationTime, 7 MinimizatonAttempts, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 149.9ms SsaConstructionTime, 543.3ms SatisfiabilityAnalysisTime, 2085.7ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 15 QuantifiedInterpolants, 666 SizeOfPredicates, 27 NumberOfNonLiveVariables, 423 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 00:27:45,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a03bef4d-58aa-41e9-857c-1187a2071b02/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...