./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_0730c.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_0730c.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3 --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 83c30cf69d350d7f7844d9a61780744d2d19365f ........................................................................................................................................................................................................................................................................................................................ 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_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_0730c.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3 --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 83c30cf69d350d7f7844d9a61780744d2d19365f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:40:44,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:40:44,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:40:44,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:40:44,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:40:44,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:40:44,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:40:44,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:40:44,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:40:44,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:40:44,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:40:44,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:40:44,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:40:44,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:40:44,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:40:44,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:40:44,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:40:44,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:40:44,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:40:44,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:40:44,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:40:44,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:40:44,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:40:44,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:40:44,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:40:44,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:40:44,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:40:44,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:40:44,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:40:44,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:40:45,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:40:45,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:40:45,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:40:45,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:40:45,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:40:45,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:40:45,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:40:45,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:40:45,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:40:45,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:40:45,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:40:45,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:40:45,047 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:40:45,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:40:45,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:40:45,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:40:45,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:40:45,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:40:45,061 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:40:45,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:40:45,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:40:45,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:40:45,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:40:45,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:40:45,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:40:45,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:40:45,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:40:45,065 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:40:45,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:40:45,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:40:45,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:40:45,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:40:45,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:40:45,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:40:45,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:40:45,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:40:45,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:40:45,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:40:45,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:40:45,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:40:45,069 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:40:45,069 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:40:45,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:40:45,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:40:45,070 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_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c30cf69d350d7f7844d9a61780744d2d19365f [2021-10-15 19:40:45,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:40:45,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:40:45,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:40:45,390 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:40:45,391 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:40:45,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/float-newlib/double_req_bl_0730c.c [2021-10-15 19:40:45,473 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/data/3e46d556a/f01e476f534640a2abc58f5e7d96c0e6/FLAGf747e8667 [2021-10-15 19:40:45,995 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:40:46,003 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/sv-benchmarks/c/float-newlib/double_req_bl_0730c.c [2021-10-15 19:40:46,021 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/data/3e46d556a/f01e476f534640a2abc58f5e7d96c0e6/FLAGf747e8667 [2021-10-15 19:40:46,325 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/data/3e46d556a/f01e476f534640a2abc58f5e7d96c0e6 [2021-10-15 19:40:46,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:40:46,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:40:46,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:40:46,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:40:46,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:40:46,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7edbd248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46, skipping insertion in model container [2021-10-15 19:40:46,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:40:46,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:40:46,674 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_110b2367-aa5e-47b9-a434-f48a99fe1705/sv-benchmarks/c/float-newlib/double_req_bl_0730c.c[3223,3236] [2021-10-15 19:40:46,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:40:46,696 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:40:46,763 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_110b2367-aa5e-47b9-a434-f48a99fe1705/sv-benchmarks/c/float-newlib/double_req_bl_0730c.c[3223,3236] [2021-10-15 19:40:46,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:40:46,787 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:40:46,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46 WrapperNode [2021-10-15 19:40:46,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:40:46,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:40:46,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:40:46,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:40:46,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:40:46,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:40:46,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:40:46,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:40:46,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:40:46,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:40:46,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:40:46,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:40:46,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (1/1) ... [2021-10-15 19:40:46,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:40:46,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:46,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:40:46,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:40:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:40:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:40:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-10-15 19:40:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:40:47,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-15 19:40:47,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:40:47,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:40:47,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:40:47,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:40:47,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:40:47,540 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-15 19:40:47,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:40:47 BoogieIcfgContainer [2021-10-15 19:40:47,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:40:47,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:40:47,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:40:47,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:40:47,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:40:46" (1/3) ... [2021-10-15 19:40:47,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a7877e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:40:47, skipping insertion in model container [2021-10-15 19:40:47,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:46" (2/3) ... [2021-10-15 19:40:47,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a7877e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:40:47, skipping insertion in model container [2021-10-15 19:40:47,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:40:47" (3/3) ... [2021-10-15 19:40:47,553 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_0730c.c [2021-10-15 19:40:47,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:40:47,562 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:40:47,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:40:47,630 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=PETRI_NET, 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 [2021-10-15 19:40:47,630 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:40:47,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 53 places, 84 transitions, 168 flow [2021-10-15 19:40:47,682 INFO L129 PetriNetUnfolder]: 32/84 cut-off events. [2021-10-15 19:40:47,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:40:47,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 84 events. 32/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 19:40:47,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 84 transitions, 168 flow [2021-10-15 19:40:47,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 80 transitions, 160 flow [2021-10-15 19:40:47,700 INFO L129 PetriNetUnfolder]: 11/32 cut-off events. [2021-10-15 19:40:47,700 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:40:47,700 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:47,701 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:47,702 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:47,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash 361085180, now seen corresponding path program 1 times [2021-10-15 19:40:47,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:47,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935146214] [2021-10-15 19:40:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:47,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:47,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:47,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935146214] [2021-10-15 19:40:47,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935146214] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:47,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:40:47,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:40:47,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720825391] [2021-10-15 19:40:47,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:40:47,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:47,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:40:47,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:40:47,982 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 84 [2021-10-15 19:40:47,986 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 80 transitions, 160 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-10-15 19:40:47,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:47,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 84 [2021-10-15 19:40:47,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:48,028 INFO L129 PetriNetUnfolder]: 21/70 cut-off events. [2021-10-15 19:40:48,028 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:40:48,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 70 events. 21/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 110 event pairs, 0 based on Foata normal form. 10/59 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2021-10-15 19:40:48,035 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 0 selfloop transitions, 0 changer transitions 0/70 dead transitions. [2021-10-15 19:40:48,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 140 flow [2021-10-15 19:40:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:40:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:40:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2021-10-15 19:40:48,053 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2021-10-15 19:40:48,053 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2021-10-15 19:40:48,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2021-10-15 19:40:48,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:48,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2021-10-15 19:40:48,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2021-10-15 19:40:48,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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) [2021-10-15 19:40:48,078 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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) [2021-10-15 19:40:48,080 INFO L186 Difference]: Start difference. First operand has 50 places, 80 transitions, 160 flow. Second operand 2 states and 156 transitions. [2021-10-15 19:40:48,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 140 flow [2021-10-15 19:40:48,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:40:48,097 INFO L242 Difference]: Finished difference. Result has 51 places, 70 transitions, 140 flow [2021-10-15 19:40:48,099 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=140, PETRI_PLACES=51, PETRI_TRANSITIONS=70} [2021-10-15 19:40:48,101 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2021-10-15 19:40:48,102 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 70 transitions, 140 flow [2021-10-15 19:40:48,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-10-15 19:40:48,103 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:48,104 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:48,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:40:48,105 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:48,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:48,106 INFO L82 PathProgramCache]: Analyzing trace with hash 331839487, now seen corresponding path program 1 times [2021-10-15 19:40:48,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:40:48,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687669968] [2021-10-15 19:40:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:48,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:40:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:40:48,202 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:40:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:40:48,305 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:40:48,306 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:40:48,308 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:40:48,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:40:48,317 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:40:48,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:40:48 BoogieIcfgContainer [2021-10-15 19:40:48,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:40:48,364 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:40:48,364 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:40:48,364 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:40:48,365 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:40:47" (3/4) ... [2021-10-15 19:40:48,369 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 19:40:48,369 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:40:48,372 INFO L168 Benchmark]: Toolchain (without parser) took 2040.37 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 41.1 MB in the beginning and 42.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:48,372 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 77.6 MB. Free memory is still 57.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:40:48,375 INFO L168 Benchmark]: CACSL2BoogieTranslator took 461.85 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 40.8 MB in the beginning and 67.6 MB in the end (delta: -26.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:48,378 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.94 ms. Allocated memory is still 94.4 MB. Free memory was 67.6 MB in the beginning and 65.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:48,384 INFO L168 Benchmark]: Boogie Preprocessor took 44.85 ms. Allocated memory is still 94.4 MB. Free memory was 65.3 MB in the beginning and 63.6 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:40:48,387 INFO L168 Benchmark]: RCFGBuilder took 626.30 ms. Allocated memory is still 94.4 MB. Free memory was 63.6 MB in the beginning and 70.6 MB in the end (delta: -7.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:48,388 INFO L168 Benchmark]: TraceAbstraction took 814.82 ms. Allocated memory is still 94.4 MB. Free memory was 70.1 MB in the beginning and 43.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:48,390 INFO L168 Benchmark]: Witness Printer took 5.10 ms. Allocated memory is still 94.4 MB. Free memory was 43.4 MB in the beginning and 42.9 MB in the end (delta: 480.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:40:48,395 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 77.6 MB. Free memory is still 57.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 461.85 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 40.8 MB in the beginning and 67.6 MB in the end (delta: -26.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.94 ms. Allocated memory is still 94.4 MB. Free memory was 67.6 MB in the beginning and 65.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.85 ms. Allocated memory is still 94.4 MB. Free memory was 65.3 MB in the beginning and 63.6 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 626.30 ms. Allocated memory is still 94.4 MB. Free memory was 63.6 MB in the beginning and 70.6 MB in the end (delta: -7.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 814.82 ms. Allocated memory is still 94.4 MB. Free memory was 70.1 MB in the beginning and 43.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.10 ms. Allocated memory is still 94.4 MB. Free memory was 43.4 MB in the beginning and 42.9 MB in the end (delta: 480.6 kB). 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: 156]: 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 155, overapproximation of someBinaryArithmeticDOUBLEoperation at line 35, overapproximation of bitwiseAnd at line 34. Possible FailurePath: [L19] static const double one_sqrt = 1.0, tiny_sqrt = 1.0e-300; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L151] double x = 0.0; [L22] double z; [L23] __int32_t sign = 0x80000000; [L24] __uint32_t r, t1, s1, ix1, q1; [L25] __int32_t ix0, s0, q, m, t, i; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L28] ieee_double_shape_type ew_u; [L29] ew_u.value = (x) [L30] EXPR ew_u.parts.msw [L30] (ix0) = ew_u.parts.msw [L31] EXPR ew_u.parts.lsw [L31] (ix1) = ew_u.parts.lsw [L34] COND TRUE (ix0 & 0x7ff00000) == 0x7ff00000 [L35] return x * x + x; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L152] double res = __ieee754_sqrt(x); [L155] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L155] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L156] reach_error() VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 699.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 136.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 62.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 0 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 19.4ms SsaConstructionTime, 104.1ms SatisfiabilityAnalysisTime, 85.5ms InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-15 19:40:48,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/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-5709675 [2021-10-15 19:40:51,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:40:51,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:40:51,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:40:51,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:40:51,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:40:51,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:40:51,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:40:51,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:40:51,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:40:51,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:40:51,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:40:51,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:40:51,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:40:51,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:40:51,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:40:51,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:40:51,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:40:51,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:40:51,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:40:51,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:40:51,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:40:51,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:40:51,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:40:51,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:40:51,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:40:51,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:40:51,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:40:51,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:40:51,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:40:51,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:40:51,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:40:51,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:40:51,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:40:51,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:40:51,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:40:51,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:40:51,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:40:51,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:40:51,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:40:51,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:40:51,564 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-15 19:40:51,609 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:40:51,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:40:51,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:40:51,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:40:51,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:40:51,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:40:51,611 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:40:51,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:40:51,612 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:40:51,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:40:51,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:40:51,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:40:51,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:40:51,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:40:51,615 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 19:40:51,615 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 19:40:51,615 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:40:51,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:40:51,616 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:40:51,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:40:51,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:40:51,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:40:51,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:40:51,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:40:51,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:40:51,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:40:51,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:40:51,618 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 19:40:51,619 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 19:40:51,619 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:40:51,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:40:51,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:40:51,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:40:51,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 19:40:51,621 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_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c30cf69d350d7f7844d9a61780744d2d19365f [2021-10-15 19:40:52,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:40:52,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:40:52,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:40:52,146 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:40:52,147 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:40:52,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/float-newlib/double_req_bl_0730c.c [2021-10-15 19:40:52,235 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/data/6a47f5997/fdfd1871c1a541bdae847fc336228209/FLAG54bb3b745 [2021-10-15 19:40:52,947 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:40:52,947 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/sv-benchmarks/c/float-newlib/double_req_bl_0730c.c [2021-10-15 19:40:52,956 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/data/6a47f5997/fdfd1871c1a541bdae847fc336228209/FLAG54bb3b745 [2021-10-15 19:40:53,274 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/data/6a47f5997/fdfd1871c1a541bdae847fc336228209 [2021-10-15 19:40:53,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:40:53,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:40:53,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:40:53,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:40:53,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:40:53,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@120eae40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53, skipping insertion in model container [2021-10-15 19:40:53,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:40:53,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:40:53,553 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_110b2367-aa5e-47b9-a434-f48a99fe1705/sv-benchmarks/c/float-newlib/double_req_bl_0730c.c[3223,3236] [2021-10-15 19:40:53,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:40:53,601 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:40:53,655 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_110b2367-aa5e-47b9-a434-f48a99fe1705/sv-benchmarks/c/float-newlib/double_req_bl_0730c.c[3223,3236] [2021-10-15 19:40:53,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:40:53,698 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:40:53,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53 WrapperNode [2021-10-15 19:40:53,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:40:53,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:40:53,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:40:53,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:40:53,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:40:53,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:40:53,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:40:53,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:40:53,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:40:53,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:40:53,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:40:53,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:40:53,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (1/1) ... [2021-10-15 19:40:53,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:40:53,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:40:53,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:40:53,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:40:53,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-10-15 19:40:53,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-15 19:40:53,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 19:40:53,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:40:53,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-15 19:40:53,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:40:53,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:40:53,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-15 19:40:53,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:40:58,716 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:40:58,722 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-15 19:40:58,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:40:58 BoogieIcfgContainer [2021-10-15 19:40:58,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:40:58,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:40:58,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:40:58,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:40:58,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:40:53" (1/3) ... [2021-10-15 19:40:58,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25064ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:40:58, skipping insertion in model container [2021-10-15 19:40:58,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:40:53" (2/3) ... [2021-10-15 19:40:58,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25064ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:40:58, skipping insertion in model container [2021-10-15 19:40:58,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:40:58" (3/3) ... [2021-10-15 19:40:58,734 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_0730c.c [2021-10-15 19:40:58,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:40:58,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:40:58,794 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:40:58,801 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=PETRI_NET, 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 [2021-10-15 19:40:58,801 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:40:58,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 53 places, 84 transitions, 168 flow [2021-10-15 19:40:58,847 INFO L129 PetriNetUnfolder]: 32/84 cut-off events. [2021-10-15 19:40:58,848 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:40:58,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 84 events. 32/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 19:40:58,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 84 transitions, 168 flow [2021-10-15 19:40:58,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 80 transitions, 160 flow [2021-10-15 19:40:58,862 INFO L129 PetriNetUnfolder]: 11/32 cut-off events. [2021-10-15 19:40:58,862 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:40:58,862 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:58,863 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:58,864 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:58,870 INFO L82 PathProgramCache]: Analyzing trace with hash 361085180, now seen corresponding path program 1 times [2021-10-15 19:40:58,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:40:58,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121803828] [2021-10-15 19:40:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:58,883 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:40:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:40:58,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:40:58,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 19:40:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:40:59,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-15 19:40:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:59,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:40:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:40:59,430 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:40:59,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121803828] [2021-10-15 19:40:59,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121803828] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:40:59,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:40:59,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 19:40:59,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097312833] [2021-10-15 19:40:59,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:40:59,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:40:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:40:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:40:59,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 84 [2021-10-15 19:40:59,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 80 transitions, 160 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-10-15 19:40:59,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:59,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 84 [2021-10-15 19:40:59,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:59,504 INFO L129 PetriNetUnfolder]: 21/70 cut-off events. [2021-10-15 19:40:59,505 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:40:59,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 70 events. 21/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 110 event pairs, 0 based on Foata normal form. 10/59 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2021-10-15 19:40:59,507 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 0 selfloop transitions, 0 changer transitions 0/70 dead transitions. [2021-10-15 19:40:59,507 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 140 flow [2021-10-15 19:40:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:40:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:40:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2021-10-15 19:40:59,518 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2021-10-15 19:40:59,519 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2021-10-15 19:40:59,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2021-10-15 19:40:59,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:59,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2021-10-15 19:40:59,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2021-10-15 19:40:59,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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) [2021-10-15 19:40:59,532 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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) [2021-10-15 19:40:59,534 INFO L186 Difference]: Start difference. First operand has 50 places, 80 transitions, 160 flow. Second operand 2 states and 156 transitions. [2021-10-15 19:40:59,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 140 flow [2021-10-15 19:40:59,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:40:59,541 INFO L242 Difference]: Finished difference. Result has 51 places, 70 transitions, 140 flow [2021-10-15 19:40:59,543 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=140, PETRI_PLACES=51, PETRI_TRANSITIONS=70} [2021-10-15 19:40:59,544 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2021-10-15 19:40:59,544 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 70 transitions, 140 flow [2021-10-15 19:40:59,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-10-15 19:40:59,545 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:40:59,545 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:40:59,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-15 19:40:59,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:40:59,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:40:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:40:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash 331839487, now seen corresponding path program 1 times [2021-10-15 19:40:59,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:40:59,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59434052] [2021-10-15 19:40:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:40:59,752 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:40:59,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:40:59,753 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:40:59,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 19:41:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:00,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:41:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:00,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:00,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:00,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59434052] [2021-10-15 19:41:00,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59434052] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:00,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:00,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-15 19:41:00,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550879517] [2021-10-15 19:41:00,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:41:00,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:41:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:41:00,782 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 84 [2021-10-15 19:41:00,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 70 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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) [2021-10-15 19:41:00,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:00,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 84 [2021-10-15 19:41:00,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:02,524 INFO L129 PetriNetUnfolder]: 18/80 cut-off events. [2021-10-15 19:41:02,524 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:41:02,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 80 events. 18/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 122 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 113. Up to 18 conditions per place. [2021-10-15 19:41:02,526 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 23 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2021-10-15 19:41:02,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 71 transitions, 208 flow [2021-10-15 19:41:02,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:41:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:41:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 242 transitions. [2021-10-15 19:41:02,532 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2021-10-15 19:41:02,532 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 242 transitions. [2021-10-15 19:41:02,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 242 transitions. [2021-10-15 19:41:02,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:02,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 242 transitions. [2021-10-15 19:41:02,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2021-10-15 19:41:02,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 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) [2021-10-15 19:41:02,541 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 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) [2021-10-15 19:41:02,541 INFO L186 Difference]: Start difference. First operand has 51 places, 70 transitions, 140 flow. Second operand 5 states and 242 transitions. [2021-10-15 19:41:02,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 71 transitions, 208 flow [2021-10-15 19:41:02,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 208 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:41:02,550 INFO L242 Difference]: Finished difference. Result has 57 places, 71 transitions, 181 flow [2021-10-15 19:41:02,551 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=57, PETRI_TRANSITIONS=71} [2021-10-15 19:41:02,551 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 7 predicate places. [2021-10-15 19:41:02,552 INFO L470 AbstractCegarLoop]: Abstraction has has 57 places, 71 transitions, 181 flow [2021-10-15 19:41:02,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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) [2021-10-15 19:41:02,552 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:02,552 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:02,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:02,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:02,775 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:02,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1929218748, now seen corresponding path program 1 times [2021-10-15 19:41:02,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:02,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199299965] [2021-10-15 19:41:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:02,776 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:02,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:02,777 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:02,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-15 19:41:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:41:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:03,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:03,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:03,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199299965] [2021-10-15 19:41:03,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199299965] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:03,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:03,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-15 19:41:03,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755458798] [2021-10-15 19:41:03,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:41:03,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:03,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:41:03,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:41:03,331 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 84 [2021-10-15 19:41:03,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 71 transitions, 181 flow. Second operand has 7 states, 7 states have (on average 62.42857142857143) internal successors, (437), 7 states have internal predecessors, (437), 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) [2021-10-15 19:41:03,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:03,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 84 [2021-10-15 19:41:03,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:03,649 INFO L129 PetriNetUnfolder]: 17/79 cut-off events. [2021-10-15 19:41:03,649 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 19:41:03,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 79 events. 17/79 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 112. Up to 7 conditions per place. [2021-10-15 19:41:03,651 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 7 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2021-10-15 19:41:03,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 215 flow [2021-10-15 19:41:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:41:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:41:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 380 transitions. [2021-10-15 19:41:03,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.753968253968254 [2021-10-15 19:41:03,656 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 380 transitions. [2021-10-15 19:41:03,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 380 transitions. [2021-10-15 19:41:03,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:03,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 380 transitions. [2021-10-15 19:41:03,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.333333333333336) internal successors, (380), 6 states have internal predecessors, (380), 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) [2021-10-15 19:41:03,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2021-10-15 19:41:03,674 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2021-10-15 19:41:03,674 INFO L186 Difference]: Start difference. First operand has 57 places, 71 transitions, 181 flow. Second operand 6 states and 380 transitions. [2021-10-15 19:41:03,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 215 flow [2021-10-15 19:41:03,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:03,679 INFO L242 Difference]: Finished difference. Result has 64 places, 74 transitions, 213 flow [2021-10-15 19:41:03,680 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2021-10-15 19:41:03,680 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2021-10-15 19:41:03,680 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 213 flow [2021-10-15 19:41:03,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.42857142857143) internal successors, (437), 7 states have internal predecessors, (437), 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) [2021-10-15 19:41:03,684 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:03,685 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:03,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:03,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:03,901 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:03,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:03,901 INFO L82 PathProgramCache]: Analyzing trace with hash 264903321, now seen corresponding path program 1 times [2021-10-15 19:41:03,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:03,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325569824] [2021-10-15 19:41:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:03,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:03,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:03,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-15 19:41:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:04,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:41:04,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:04,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:05,793 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:05,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325569824] [2021-10-15 19:41:05,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325569824] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:05,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:05,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-10-15 19:41:05,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488023463] [2021-10-15 19:41:05,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 19:41:05,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:05,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:41:05,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:41:05,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 84 [2021-10-15 19:41:05,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 213 flow. Second operand has 14 states, 14 states have (on average 60.142857142857146) internal successors, (842), 14 states have internal predecessors, (842), 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) [2021-10-15 19:41:05,802 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:05,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 84 [2021-10-15 19:41:05,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:06,706 INFO L129 PetriNetUnfolder]: 17/77 cut-off events. [2021-10-15 19:41:06,706 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 19:41:06,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 77 events. 17/77 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 0 based on Foata normal form. 1/64 useless extension candidates. Maximal degree in co-relation 126. Up to 7 conditions per place. [2021-10-15 19:41:06,708 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 7 selfloop transitions, 3 changer transitions 6/76 dead transitions. [2021-10-15 19:41:06,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 249 flow [2021-10-15 19:41:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:41:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:41:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2021-10-15 19:41:06,712 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7248677248677249 [2021-10-15 19:41:06,712 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2021-10-15 19:41:06,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2021-10-15 19:41:06,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:06,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2021-10-15 19:41:06,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 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) [2021-10-15 19:41:06,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 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) [2021-10-15 19:41:06,722 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 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) [2021-10-15 19:41:06,722 INFO L186 Difference]: Start difference. First operand has 64 places, 74 transitions, 213 flow. Second operand 9 states and 548 transitions. [2021-10-15 19:41:06,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 249 flow [2021-10-15 19:41:06,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 76 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:06,727 INFO L242 Difference]: Finished difference. Result has 74 places, 70 transitions, 202 flow [2021-10-15 19:41:06,728 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=202, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2021-10-15 19:41:06,728 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2021-10-15 19:41:06,728 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 202 flow [2021-10-15 19:41:06,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.142857142857146) internal successors, (842), 14 states have internal predecessors, (842), 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) [2021-10-15 19:41:06,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:06,730 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:06,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:06,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:06,944 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:06,944 INFO L82 PathProgramCache]: Analyzing trace with hash 786549214, now seen corresponding path program 1 times [2021-10-15 19:41:06,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:06,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915989394] [2021-10-15 19:41:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:06,946 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:06,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:06,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:06,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-15 19:41:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:07,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:41:07,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:07,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:08,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:08,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915989394] [2021-10-15 19:41:08,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915989394] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:08,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:08,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-15 19:41:08,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687293308] [2021-10-15 19:41:08,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:41:08,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:41:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:41:08,105 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2021-10-15 19:41:08,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 40.875) internal successors, (327), 8 states have internal predecessors, (327), 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) [2021-10-15 19:41:08,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:08,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2021-10-15 19:41:08,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:08,806 INFO L129 PetriNetUnfolder]: 16/68 cut-off events. [2021-10-15 19:41:08,807 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 19:41:08,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 68 events. 16/68 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 131. Up to 25 conditions per place. [2021-10-15 19:41:08,808 INFO L132 encePairwiseOnDemand]: 77/84 looper letters, 27 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2021-10-15 19:41:08,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 260 flow [2021-10-15 19:41:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:41:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:41:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 223 transitions. [2021-10-15 19:41:08,819 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2021-10-15 19:41:08,820 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 223 transitions. [2021-10-15 19:41:08,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 223 transitions. [2021-10-15 19:41:08,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:08,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 223 transitions. [2021-10-15 19:41:08,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 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) [2021-10-15 19:41:08,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 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) [2021-10-15 19:41:08,826 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 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) [2021-10-15 19:41:08,827 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 202 flow. Second operand 5 states and 223 transitions. [2021-10-15 19:41:08,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 260 flow [2021-10-15 19:41:08,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 228 flow, removed 5 selfloop flow, removed 12 redundant places. [2021-10-15 19:41:08,833 INFO L242 Difference]: Finished difference. Result has 59 places, 68 transitions, 174 flow [2021-10-15 19:41:08,834 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2021-10-15 19:41:08,834 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2021-10-15 19:41:08,834 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 174 flow [2021-10-15 19:41:08,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 40.875) internal successors, (327), 8 states have internal predecessors, (327), 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) [2021-10-15 19:41:08,835 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:08,835 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:08,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:09,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:09,056 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash 664664257, now seen corresponding path program 1 times [2021-10-15 19:41:09,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:09,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207504965] [2021-10-15 19:41:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:09,057 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:09,058 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:09,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-15 19:41:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:09,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:41:09,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:10,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:11,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:11,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207504965] [2021-10-15 19:41:11,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207504965] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:41:11,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:11,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-15 19:41:11,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96995389] [2021-10-15 19:41:11,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 19:41:11,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:41:11,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:41:11,488 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2021-10-15 19:41:11,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 174 flow. Second operand has 14 states, 14 states have (on average 38.5) internal successors, (539), 14 states have internal predecessors, (539), 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) [2021-10-15 19:41:11,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:11,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2021-10-15 19:41:11,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:13,898 INFO L129 PetriNetUnfolder]: 34/141 cut-off events. [2021-10-15 19:41:13,898 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 19:41:13,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 141 events. 34/141 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 347 event pairs, 0 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 256. Up to 23 conditions per place. [2021-10-15 19:41:13,900 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 49 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2021-10-15 19:41:13,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 450 flow [2021-10-15 19:41:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:41:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:41:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 583 transitions. [2021-10-15 19:41:13,905 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4957482993197279 [2021-10-15 19:41:13,905 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 583 transitions. [2021-10-15 19:41:13,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 583 transitions. [2021-10-15 19:41:13,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:13,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 583 transitions. [2021-10-15 19:41:13,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 41.642857142857146) internal successors, (583), 14 states have internal predecessors, (583), 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) [2021-10-15 19:41:13,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 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) [2021-10-15 19:41:13,914 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 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) [2021-10-15 19:41:13,914 INFO L186 Difference]: Start difference. First operand has 59 places, 68 transitions, 174 flow. Second operand 14 states and 583 transitions. [2021-10-15 19:41:13,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 450 flow [2021-10-15 19:41:13,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 110 transitions, 436 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:41:13,920 INFO L242 Difference]: Finished difference. Result has 72 places, 85 transitions, 307 flow [2021-10-15 19:41:13,921 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=307, PETRI_PLACES=72, PETRI_TRANSITIONS=85} [2021-10-15 19:41:13,921 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2021-10-15 19:41:13,921 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 85 transitions, 307 flow [2021-10-15 19:41:13,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.5) internal successors, (539), 14 states have internal predecessors, (539), 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) [2021-10-15 19:41:13,922 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:13,923 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:13,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:14,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:14,133 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1685732611, now seen corresponding path program 1 times [2021-10-15 19:41:14,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:14,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668162699] [2021-10-15 19:41:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:14,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:14,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:14,143 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:14,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-15 19:41:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:14,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:14,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:41:14,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:41:14,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:14,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668162699] [2021-10-15 19:41:14,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668162699] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:14,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:14,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-15 19:41:14,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929479320] [2021-10-15 19:41:14,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:41:14,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:14,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:41:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:41:14,662 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 84 [2021-10-15 19:41:14,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 307 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 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) [2021-10-15 19:41:14,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:14,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 84 [2021-10-15 19:41:14,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:14,848 INFO L129 PetriNetUnfolder]: 36/151 cut-off events. [2021-10-15 19:41:14,848 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-10-15 19:41:14,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 151 events. 36/151 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 351 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 260. Up to 14 conditions per place. [2021-10-15 19:41:14,850 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 10 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2021-10-15 19:41:14,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 89 transitions, 351 flow [2021-10-15 19:41:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:41:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:41:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 262 transitions. [2021-10-15 19:41:14,853 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7797619047619048 [2021-10-15 19:41:14,854 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 262 transitions. [2021-10-15 19:41:14,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 262 transitions. [2021-10-15 19:41:14,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:14,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 262 transitions. [2021-10-15 19:41:14,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 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) [2021-10-15 19:41:14,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 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) [2021-10-15 19:41:14,857 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 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) [2021-10-15 19:41:14,858 INFO L186 Difference]: Start difference. First operand has 72 places, 85 transitions, 307 flow. Second operand 4 states and 262 transitions. [2021-10-15 19:41:14,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 89 transitions, 351 flow [2021-10-15 19:41:14,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 342 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:41:14,864 INFO L242 Difference]: Finished difference. Result has 75 places, 87 transitions, 340 flow [2021-10-15 19:41:14,865 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=340, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2021-10-15 19:41:14,865 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2021-10-15 19:41:14,865 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 340 flow [2021-10-15 19:41:14,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 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) [2021-10-15 19:41:14,866 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:14,866 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:14,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-15 19:41:15,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:15,083 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:15,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:15,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2014215043, now seen corresponding path program 1 times [2021-10-15 19:41:15,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:15,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612706653] [2021-10-15 19:41:15,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:15,085 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:15,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:15,086 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:15,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-15 19:41:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:15,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:41:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:41:15,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:41:17,005 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:17,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612706653] [2021-10-15 19:41:17,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612706653] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:17,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:17,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-15 19:41:17,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791652194] [2021-10-15 19:41:17,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:41:17,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:17,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:41:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:41:17,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 84 [2021-10-15 19:41:17,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 340 flow. Second operand has 10 states, 10 states have (on average 35.2) internal successors, (352), 10 states have internal predecessors, (352), 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) [2021-10-15 19:41:17,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:17,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 84 [2021-10-15 19:41:17,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:19,154 INFO L129 PetriNetUnfolder]: 36/159 cut-off events. [2021-10-15 19:41:19,155 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2021-10-15 19:41:19,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 159 events. 36/159 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 389 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 377. Up to 77 conditions per place. [2021-10-15 19:41:19,157 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 45 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2021-10-15 19:41:19,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 96 transitions, 500 flow [2021-10-15 19:41:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:41:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:41:19,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 433 transitions. [2021-10-15 19:41:19,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42956349206349204 [2021-10-15 19:41:19,163 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 433 transitions. [2021-10-15 19:41:19,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 433 transitions. [2021-10-15 19:41:19,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:19,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 433 transitions. [2021-10-15 19:41:19,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 36.083333333333336) internal successors, (433), 12 states have internal predecessors, (433), 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) [2021-10-15 19:41:19,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 84.0) internal successors, (1092), 13 states have internal predecessors, (1092), 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) [2021-10-15 19:41:19,170 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 84.0) internal successors, (1092), 13 states have internal predecessors, (1092), 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) [2021-10-15 19:41:19,170 INFO L186 Difference]: Start difference. First operand has 75 places, 87 transitions, 340 flow. Second operand 12 states and 433 transitions. [2021-10-15 19:41:19,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 96 transitions, 500 flow [2021-10-15 19:41:19,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 96 transitions, 500 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:41:19,184 INFO L242 Difference]: Finished difference. Result has 90 places, 95 transitions, 429 flow [2021-10-15 19:41:19,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=429, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2021-10-15 19:41:19,185 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 40 predicate places. [2021-10-15 19:41:19,185 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 429 flow [2021-10-15 19:41:19,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 35.2) internal successors, (352), 10 states have internal predecessors, (352), 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) [2021-10-15 19:41:19,186 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:19,186 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:19,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:19,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:19,408 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:19,409 INFO L82 PathProgramCache]: Analyzing trace with hash 88249859, now seen corresponding path program 1 times [2021-10-15 19:41:19,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:19,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367077401] [2021-10-15 19:41:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:19,410 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:19,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:19,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:19,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-15 19:41:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:19,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:41:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:41:19,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:41:20,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:20,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367077401] [2021-10-15 19:41:20,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367077401] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:41:20,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:20,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-15 19:41:20,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275087130] [2021-10-15 19:41:20,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:41:20,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:20,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:41:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:41:20,362 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 84 [2021-10-15 19:41:20,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 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) [2021-10-15 19:41:20,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:20,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 84 [2021-10-15 19:41:20,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:20,708 INFO L129 PetriNetUnfolder]: 43/189 cut-off events. [2021-10-15 19:41:20,708 INFO L130 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2021-10-15 19:41:20,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 189 events. 43/189 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 416 event pairs, 0 based on Foata normal form. 8/176 useless extension candidates. Maximal degree in co-relation 479. Up to 25 conditions per place. [2021-10-15 19:41:20,711 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 22 selfloop transitions, 14 changer transitions 0/107 dead transitions. [2021-10-15 19:41:20,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 107 transitions, 573 flow [2021-10-15 19:41:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:41:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:41:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 520 transitions. [2021-10-15 19:41:20,716 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7738095238095238 [2021-10-15 19:41:20,716 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 520 transitions. [2021-10-15 19:41:20,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 520 transitions. [2021-10-15 19:41:20,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:20,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 520 transitions. [2021-10-15 19:41:20,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.0) internal successors, (520), 8 states have internal predecessors, (520), 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) [2021-10-15 19:41:20,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 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) [2021-10-15 19:41:20,722 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 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) [2021-10-15 19:41:20,722 INFO L186 Difference]: Start difference. First operand has 90 places, 95 transitions, 429 flow. Second operand 8 states and 520 transitions. [2021-10-15 19:41:20,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 107 transitions, 573 flow [2021-10-15 19:41:20,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 107 transitions, 535 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-10-15 19:41:20,729 INFO L242 Difference]: Finished difference. Result has 99 places, 100 transitions, 486 flow [2021-10-15 19:41:20,730 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=486, PETRI_PLACES=99, PETRI_TRANSITIONS=100} [2021-10-15 19:41:20,730 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 49 predicate places. [2021-10-15 19:41:20,730 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 486 flow [2021-10-15 19:41:20,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 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) [2021-10-15 19:41:20,731 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:20,731 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:20,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:20,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:20,948 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash -353187839, now seen corresponding path program 1 times [2021-10-15 19:41:20,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:20,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748383283] [2021-10-15 19:41:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:20,949 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:20,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:20,951 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:20,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-15 19:41:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:41:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:41:23,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:41:27,107 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:27,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748383283] [2021-10-15 19:41:27,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748383283] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:41:27,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:27,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-15 19:41:27,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668508833] [2021-10-15 19:41:27,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-15 19:41:27,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-15 19:41:27,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-10-15 19:41:27,110 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 84 [2021-10-15 19:41:27,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 486 flow. Second operand has 22 states, 22 states have (on average 34.0) internal successors, (748), 22 states have internal predecessors, (748), 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) [2021-10-15 19:41:27,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:27,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 84 [2021-10-15 19:41:27,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:40,836 WARN L207 SmtUtils]: Spent 8.24 s on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-10-15 19:41:44,778 INFO L129 PetriNetUnfolder]: 43/199 cut-off events. [2021-10-15 19:41:44,778 INFO L130 PetriNetUnfolder]: For 229/229 co-relation queries the response was YES. [2021-10-15 19:41:44,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 649 conditions, 199 events. 43/199 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 462 event pairs, 0 based on Foata normal form. 4/186 useless extension candidates. Maximal degree in co-relation 629. Up to 107 conditions per place. [2021-10-15 19:41:44,785 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 49 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2021-10-15 19:41:44,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 106 transitions, 676 flow [2021-10-15 19:41:44,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 19:41:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-15 19:41:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 630 transitions. [2021-10-15 19:41:44,791 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2021-10-15 19:41:44,791 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 630 transitions. [2021-10-15 19:41:44,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 630 transitions. [2021-10-15 19:41:44,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:44,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 630 transitions. [2021-10-15 19:41:44,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 35.0) internal successors, (630), 18 states have internal predecessors, (630), 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) [2021-10-15 19:41:44,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 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) [2021-10-15 19:41:44,809 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 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) [2021-10-15 19:41:44,809 INFO L186 Difference]: Start difference. First operand has 99 places, 100 transitions, 486 flow. Second operand 18 states and 630 transitions. [2021-10-15 19:41:44,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 106 transitions, 676 flow [2021-10-15 19:41:44,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 106 transitions, 661 flow, removed 5 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:44,818 INFO L242 Difference]: Finished difference. Result has 119 places, 106 transitions, 584 flow [2021-10-15 19:41:44,818 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=584, PETRI_PLACES=119, PETRI_TRANSITIONS=106} [2021-10-15 19:41:44,819 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2021-10-15 19:41:44,819 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 106 transitions, 584 flow [2021-10-15 19:41:44,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 34.0) internal successors, (748), 22 states have internal predecessors, (748), 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) [2021-10-15 19:41:44,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:44,820 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:44,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:45,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:45,038 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:45,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:45,038 INFO L82 PathProgramCache]: Analyzing trace with hash -32532797, now seen corresponding path program 2 times [2021-10-15 19:41:45,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:45,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603339048] [2021-10-15 19:41:45,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:41:45,039 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:45,041 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:45,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-15 19:41:45,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-15 19:41:45,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:41:45,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:41:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-15 19:41:45,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-15 19:41:46,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:46,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603339048] [2021-10-15 19:41:46,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603339048] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:46,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:46,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-15 19:41:46,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977611216] [2021-10-15 19:41:46,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:41:46,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:41:46,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:41:46,455 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2021-10-15 19:41:46,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 106 transitions, 584 flow. Second operand has 6 states, 6 states have (on average 58.333333333333336) internal successors, (350), 6 states have internal predecessors, (350), 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) [2021-10-15 19:41:46,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:46,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2021-10-15 19:41:46,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:46,823 INFO L129 PetriNetUnfolder]: 49/221 cut-off events. [2021-10-15 19:41:46,823 INFO L130 PetriNetUnfolder]: For 377/377 co-relation queries the response was YES. [2021-10-15 19:41:46,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 221 events. 49/221 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 491 event pairs, 0 based on Foata normal form. 4/202 useless extension candidates. Maximal degree in co-relation 718. Up to 55 conditions per place. [2021-10-15 19:41:46,838 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 24 selfloop transitions, 23 changer transitions 0/113 dead transitions. [2021-10-15 19:41:46,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 113 transitions, 719 flow [2021-10-15 19:41:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:41:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:41:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 302 transitions. [2021-10-15 19:41:46,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.719047619047619 [2021-10-15 19:41:46,841 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 302 transitions. [2021-10-15 19:41:46,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 302 transitions. [2021-10-15 19:41:46,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:46,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 302 transitions. [2021-10-15 19:41:46,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 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) [2021-10-15 19:41:46,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 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) [2021-10-15 19:41:46,845 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 84.0) internal successors, (504), 6 states have internal predecessors, (504), 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) [2021-10-15 19:41:46,845 INFO L186 Difference]: Start difference. First operand has 119 places, 106 transitions, 584 flow. Second operand 5 states and 302 transitions. [2021-10-15 19:41:46,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 113 transitions, 719 flow [2021-10-15 19:41:46,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 113 transitions, 677 flow, removed 6 selfloop flow, removed 10 redundant places. [2021-10-15 19:41:46,856 INFO L242 Difference]: Finished difference. Result has 116 places, 108 transitions, 660 flow [2021-10-15 19:41:46,857 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=660, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2021-10-15 19:41:46,857 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 66 predicate places. [2021-10-15 19:41:46,857 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 660 flow [2021-10-15 19:41:46,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.333333333333336) internal successors, (350), 6 states have internal predecessors, (350), 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) [2021-10-15 19:41:46,858 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:46,858 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:46,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:47,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:47,075 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:47,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1002125189, now seen corresponding path program 1 times [2021-10-15 19:41:47,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:47,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288913779] [2021-10-15 19:41:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:47,077 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:47,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:47,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:47,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-15 19:41:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:47,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:41:47,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:41:48,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:41:48,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:48,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288913779] [2021-10-15 19:41:48,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288913779] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:41:48,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:48,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-15 19:41:48,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022537798] [2021-10-15 19:41:48,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 19:41:48,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:48,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 19:41:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:41:48,889 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 84 [2021-10-15 19:41:48,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 660 flow. Second operand has 16 states, 16 states have (on average 63.3125) internal successors, (1013), 16 states have internal predecessors, (1013), 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) [2021-10-15 19:41:48,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:48,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 84 [2021-10-15 19:41:48,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:50,027 INFO L129 PetriNetUnfolder]: 65/285 cut-off events. [2021-10-15 19:41:50,027 INFO L130 PetriNetUnfolder]: For 1195/1195 co-relation queries the response was YES. [2021-10-15 19:41:50,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 285 events. 65/285 cut-off events. For 1195/1195 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 555 event pairs, 0 based on Foata normal form. 16/276 useless extension candidates. Maximal degree in co-relation 1184. Up to 61 conditions per place. [2021-10-15 19:41:50,031 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 42 selfloop transitions, 25 changer transitions 0/139 dead transitions. [2021-10-15 19:41:50,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 139 transitions, 1132 flow [2021-10-15 19:41:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:41:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 19:41:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1036 transitions. [2021-10-15 19:41:50,037 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7708333333333334 [2021-10-15 19:41:50,037 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1036 transitions. [2021-10-15 19:41:50,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1036 transitions. [2021-10-15 19:41:50,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:50,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1036 transitions. [2021-10-15 19:41:50,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 64.75) internal successors, (1036), 16 states have internal predecessors, (1036), 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) [2021-10-15 19:41:50,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 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) [2021-10-15 19:41:50,048 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 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) [2021-10-15 19:41:50,049 INFO L186 Difference]: Start difference. First operand has 116 places, 108 transitions, 660 flow. Second operand 16 states and 1036 transitions. [2021-10-15 19:41:50,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 139 transitions, 1132 flow [2021-10-15 19:41:50,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 139 transitions, 1131 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:50,064 INFO L242 Difference]: Finished difference. Result has 139 places, 117 transitions, 883 flow [2021-10-15 19:41:50,065 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=883, PETRI_PLACES=139, PETRI_TRANSITIONS=117} [2021-10-15 19:41:50,065 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 89 predicate places. [2021-10-15 19:41:50,066 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 117 transitions, 883 flow [2021-10-15 19:41:50,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.3125) internal successors, (1013), 16 states have internal predecessors, (1013), 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) [2021-10-15 19:41:50,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:50,067 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 11, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:50,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:50,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:50,283 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:50,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2010504575, now seen corresponding path program 1 times [2021-10-15 19:41:50,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:50,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334929354] [2021-10-15 19:41:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:50,285 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:50,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:50,286 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:50,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-15 19:41:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 19:41:50,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:41:52,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:41:54,759 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:54,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334929354] [2021-10-15 19:41:54,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334929354] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:41:54,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:41:54,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-10-15 19:41:54,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722686567] [2021-10-15 19:41:54,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-15 19:41:54,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:54,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-15 19:41:54,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2021-10-15 19:41:54,773 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 84 [2021-10-15 19:41:54,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 117 transitions, 883 flow. Second operand has 32 states, 32 states have (on average 63.21875) internal successors, (2023), 32 states have internal predecessors, (2023), 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) [2021-10-15 19:41:54,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:54,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 84 [2021-10-15 19:41:54,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:57,754 INFO L129 PetriNetUnfolder]: 81/349 cut-off events. [2021-10-15 19:41:57,754 INFO L130 PetriNetUnfolder]: For 3287/3287 co-relation queries the response was YES. [2021-10-15 19:41:57,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 349 events. 81/349 cut-off events. For 3287/3287 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 619 event pairs, 0 based on Foata normal form. 16/340 useless extension candidates. Maximal degree in co-relation 1775. Up to 93 conditions per place. [2021-10-15 19:41:57,761 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 58 selfloop transitions, 33 changer transitions 0/163 dead transitions. [2021-10-15 19:41:57,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 163 transitions, 1627 flow [2021-10-15 19:41:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-15 19:41:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-15 19:41:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1548 transitions. [2021-10-15 19:41:57,766 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7678571428571429 [2021-10-15 19:41:57,767 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1548 transitions. [2021-10-15 19:41:57,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1548 transitions. [2021-10-15 19:41:57,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:57,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1548 transitions. [2021-10-15 19:41:57,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 64.5) internal successors, (1548), 24 states have internal predecessors, (1548), 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) [2021-10-15 19:41:57,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 84.0) internal successors, (2100), 25 states have internal predecessors, (2100), 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) [2021-10-15 19:41:57,791 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 84.0) internal successors, (2100), 25 states have internal predecessors, (2100), 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) [2021-10-15 19:41:57,792 INFO L186 Difference]: Start difference. First operand has 139 places, 117 transitions, 883 flow. Second operand 24 states and 1548 transitions. [2021-10-15 19:41:57,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 163 transitions, 1627 flow [2021-10-15 19:41:57,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 163 transitions, 1609 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-10-15 19:41:57,817 INFO L242 Difference]: Finished difference. Result has 166 places, 126 transitions, 1141 flow [2021-10-15 19:41:57,818 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1141, PETRI_PLACES=166, PETRI_TRANSITIONS=126} [2021-10-15 19:41:57,818 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2021-10-15 19:41:57,818 INFO L470 AbstractCegarLoop]: Abstraction has has 166 places, 126 transitions, 1141 flow [2021-10-15 19:41:57,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.21875) internal successors, (2023), 32 states have internal predecessors, (2023), 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) [2021-10-15 19:41:57,820 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:57,820 INFO L254 CegarLoopForPetriNet]: trace histogram [22, 22, 19, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:57,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:58,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:58,033 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:58,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:58,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1061813631, now seen corresponding path program 2 times [2021-10-15 19:41:58,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:58,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080407618] [2021-10-15 19:41:58,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:41:58,035 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:58,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:58,036 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:58,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-15 19:41:58,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-15 19:41:58,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:41:58,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:41:58,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:58,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-10-15 19:41:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2021-10-15 19:41:59,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:42:00,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-10-15 19:42:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2021-10-15 19:42:00,127 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:42:00,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080407618] [2021-10-15 19:42:00,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080407618] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:42:00,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:42:00,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-15 19:42:00,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45160166] [2021-10-15 19:42:00,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:42:00,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:42:00,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:42:00,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:42:00,130 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 84 [2021-10-15 19:42:00,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 126 transitions, 1141 flow. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2021-10-15 19:42:00,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:42:00,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 84 [2021-10-15 19:42:00,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:42:00,204 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-10-15 19:42:00,204 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:42:00,204 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 6 events. 0/6 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/7 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:42:00,204 INFO L132 encePairwiseOnDemand]: 81/84 looper letters, 0 selfloop transitions, 0 changer transitions 6/6 dead transitions. [2021-10-15 19:42:00,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 6 transitions, 28 flow [2021-10-15 19:42:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:42:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:42:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2021-10-15 19:42:00,205 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2021-10-15 19:42:00,205 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 145 transitions. [2021-10-15 19:42:00,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 145 transitions. [2021-10-15 19:42:00,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:42:00,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 145 transitions. [2021-10-15 19:42:00,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2021-10-15 19:42:00,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 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) [2021-10-15 19:42:00,208 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 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) [2021-10-15 19:42:00,209 INFO L186 Difference]: Start difference. First operand has 166 places, 126 transitions, 1141 flow. Second operand 4 states and 145 transitions. [2021-10-15 19:42:00,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 6 transitions, 28 flow [2021-10-15 19:42:00,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 6 transitions, 22 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-15 19:42:00,210 INFO L242 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2021-10-15 19:42:00,210 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2021-10-15 19:42:00,210 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2021-10-15 19:42:00,210 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2021-10-15 19:42:00,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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) [2021-10-15 19:42:00,214 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:42:00,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-15 19:42:00,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:42:00,438 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:42:00,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:42:00 BoogieIcfgContainer [2021-10-15 19:42:00,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:42:00,465 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:42:00,466 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:42:00,466 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:42:00,466 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:40:58" (3/4) ... [2021-10-15 19:42:00,470 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:42:00,490 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-15 19:42:00,491 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:42:00,491 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:42:00,492 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:42:00,573 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:42:00,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:42:00,575 INFO L168 Benchmark]: Toolchain (without parser) took 67295.23 ms. Allocated memory was 54.5 MB in the beginning and 96.5 MB in the end (delta: 41.9 MB). Free memory was 32.9 MB in the beginning and 44.0 MB in the end (delta: -11.1 MB). Peak memory consumption was 30.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:00,575 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 36.1 MB in the end (delta: 44.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:42:00,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 412.15 ms. Allocated memory is still 54.5 MB. Free memory was 32.6 MB in the beginning and 34.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:00,577 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.10 ms. Allocated memory is still 54.5 MB. Free memory was 34.7 MB in the beginning and 32.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:00,577 INFO L168 Benchmark]: Boogie Preprocessor took 65.17 ms. Allocated memory is still 54.5 MB. Free memory was 32.7 MB in the beginning and 30.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:00,578 INFO L168 Benchmark]: RCFGBuilder took 4873.59 ms. Allocated memory was 54.5 MB in the beginning and 79.7 MB in the end (delta: 25.2 MB). Free memory was 30.8 MB in the beginning and 52.3 MB in the end (delta: -21.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:00,579 INFO L168 Benchmark]: TraceAbstraction took 61737.26 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 52.0 MB in the beginning and 48.1 MB in the end (delta: 3.8 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:00,579 INFO L168 Benchmark]: Witness Printer took 107.92 ms. Allocated memory is still 96.5 MB. Free memory was 48.1 MB in the beginning and 44.0 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:42:00,582 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 36.1 MB in the end (delta: 44.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 412.15 ms. Allocated memory is still 54.5 MB. Free memory was 32.6 MB in the beginning and 34.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 84.10 ms. Allocated memory is still 54.5 MB. Free memory was 34.7 MB in the beginning and 32.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.17 ms. Allocated memory is still 54.5 MB. Free memory was 32.7 MB in the beginning and 30.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4873.59 ms. Allocated memory was 54.5 MB in the beginning and 79.7 MB in the end (delta: 25.2 MB). Free memory was 30.8 MB in the beginning and 52.3 MB in the end (delta: -21.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 61737.26 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 52.0 MB in the beginning and 48.1 MB in the end (delta: 3.8 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. * Witness Printer took 107.92 ms. Allocated memory is still 96.5 MB. Free memory was 48.1 MB in the beginning and 44.0 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.2 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 - PositiveResult [Line: 156]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 61649.1ms, OverallIterations: 14, TraceHistogramMax: 22, EmptinessCheckTime: 0.0ms, AutomataDifference: 31482.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 54.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 157 SDtfs, 511 SDslu, 249 SDs, 0 SdLazy, 2017 SolverSat, 162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15617.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1115 GetRequests, 943 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 26328.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1141occurred in iteration=13, InterpolantAutomatonStates: 132, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 178.0ms SsaConstructionTime, 1522.0ms SatisfiabilityAnalysisTime, 23599.0ms InterpolantComputationTime, 550 NumberOfCodeBlocks, 458 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1072 ConstructedInterpolants, 65 QuantifiedInterpolants, 4166 SizeOfPredicates, 68 NumberOfNonLiveVariables, 1297 ConjunctsInSsa, 116 ConjunctsInUnsatCore, 28 InterpolantComputations, 18 PerfectInterpolantSequences, 1679/2378 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:42:00,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_110b2367-aa5e-47b9-a434-f48a99fe1705/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...