./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX --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 64bit --witnessprinter.graph.data.programhash 9b90640eabcf61bf9b6c4e01fcd2a39b8b829676407f71504872cd65ce1f895a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:19:03,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:19:03,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:19:03,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:19:03,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:19:03,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:19:03,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:19:03,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:19:03,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:19:03,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:19:03,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:19:03,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:19:03,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:19:03,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:19:03,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:19:03,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:19:03,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:19:03,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:19:03,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:19:03,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:19:03,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:19:03,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:19:03,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:19:03,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:19:03,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:19:03,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:19:03,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:19:03,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:19:03,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:19:03,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:19:03,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:19:03,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:19:03,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:19:03,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:19:03,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:19:03,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:19:03,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:19:03,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:19:03,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:19:03,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:19:03,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:19:03,962 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-09 09:19:03,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:19:03,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:19:04,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:19:04,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:19:04,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:19:04,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:19:04,003 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:19:04,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:19:04,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:19:04,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:19:04,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:19:04,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:19:04,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:19:04,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:19:04,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:19:04,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:19:04,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:19:04,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:19:04,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:19:04,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:19:04,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:19:04,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:19:04,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:19:04,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:19:04,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:19:04,012 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:19:04,012 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:19:04,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:19:04,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:19:04,014 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_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b90640eabcf61bf9b6c4e01fcd2a39b8b829676407f71504872cd65ce1f895a [2021-11-09 09:19:04,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:19:04,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:19:04,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:19:04,440 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:19:04,443 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:19:04,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness.i [2021-11-09 09:19:04,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/data/1e104e1f4/a8b2ad6e7fff49389dd986c7b88896e7/FLAG123f35b81 [2021-11-09 09:19:05,602 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:19:05,603 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness.i [2021-11-09 09:19:05,664 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/data/1e104e1f4/a8b2ad6e7fff49389dd986c7b88896e7/FLAG123f35b81 [2021-11-09 09:19:05,992 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/data/1e104e1f4/a8b2ad6e7fff49389dd986c7b88896e7 [2021-11-09 09:19:05,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:19:05,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:19:05,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:19:05,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:19:06,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:19:06,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:06,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e4d0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:06, skipping insertion in model container [2021-11-09 09:19:06,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:19:05" (1/1) ... [2021-11-09 09:19:06,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:19:06,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:19:06,599 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_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness.i[4499,4512] [2021-11-09 09:19:06,608 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_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness.i[4559,4572] [2021-11-09 09:19:06,646 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-09 09:19:06,665 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-09 09:19:07,898 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:07,900 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:07,901 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:07,902 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:07,904 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:07,925 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:07,926 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:07,929 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:07,930 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:08,416 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-09 09:19:08,423 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-09 09:19:08,425 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-09 09:19:08,427 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-09 09:19:08,433 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-09 09:19:08,435 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-09 09:19:08,436 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-09 09:19:08,438 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-09 09:19:08,439 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-09 09:19:08,445 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-09 09:19:08,740 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-09 09:19:08,957 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:08,958 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:19:09,097 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:19:09,114 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_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness.i[4499,4512] [2021-11-09 09:19:09,114 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_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be64_harness.i[4559,4572] [2021-11-09 09:19:09,117 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-09 09:19:09,118 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-09 09:19:09,157 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,158 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,158 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,159 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,160 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,168 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,169 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,170 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,171 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,211 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-09 09:19:09,212 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-09 09:19:09,213 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-09 09:19:09,214 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-09 09:19:09,215 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-09 09:19:09,216 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-09 09:19:09,217 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-09 09:19:09,217 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-09 09:19:09,218 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-09 09:19:09,218 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-09 09:19:09,243 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-09 09:19:09,377 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,378 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-09 09:19:09,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:19:09,796 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:19:09,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09 WrapperNode [2021-11-09 09:19:09,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:19:09,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:19:09,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:19:09,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:19:09,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (1/1) ... [2021-11-09 09:19:09,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (1/1) ... [2021-11-09 09:19:10,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:19:10,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:19:10,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:19:10,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:19:10,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (1/1) ... [2021-11-09 09:19:10,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (1/1) ... [2021-11-09 09:19:10,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (1/1) ... [2021-11-09 09:19:10,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (1/1) ... [2021-11-09 09:19:10,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (1/1) ... [2021-11-09 09:19:10,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (1/1) ... [2021-11-09 09:19:10,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (1/1) ... [2021-11-09 09:19:10,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:19:10,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:19:10,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:19:10,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:19:10,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (1/1) ... [2021-11-09 09:19:10,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:19:10,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:10,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:19:10,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:19:10,466 INFO L130 BoogieDeclarations]: Found specification of procedure htonl [2021-11-09 09:19:10,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:19:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-11-09 09:19:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-09 09:19:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-09 09:19:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:19:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:19:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 09:19:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:19:10,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:19:10,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-09 09:19:10,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-09 09:19:10,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:19:10,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 09:19:10,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-09 09:19:10,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:19:10,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-11-09 09:19:10,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:19:23,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:19:23,176 INFO L299 CfgBuilder]: Removed 128 assume(true) statements. [2021-11-09 09:19:23,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:19:23 BoogieIcfgContainer [2021-11-09 09:19:23,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:19:23,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:19:23,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:19:23,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:19:23,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:19:05" (1/3) ... [2021-11-09 09:19:23,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331ce6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:19:23, skipping insertion in model container [2021-11-09 09:19:23,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:19:09" (2/3) ... [2021-11-09 09:19:23,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331ce6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:19:23, skipping insertion in model container [2021-11-09 09:19:23,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:19:23" (3/3) ... [2021-11-09 09:19:23,190 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_read_be64_harness.i [2021-11-09 09:19:23,197 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:19:23,197 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-09 09:19:23,258 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:19:23,266 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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 [2021-11-09 09:19:23,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-09 09:19:23,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 229 states have (on average 1.4759825327510918) internal successors, (338), 243 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 09:19:23,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:23,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2021-11-09 09:19:23,304 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:19:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1384509862, now seen corresponding path program 1 times [2021-11-09 09:19:23,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:23,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123571741] [2021-11-09 09:19:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:23,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:24,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:24,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123571741] [2021-11-09 09:19:24,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123571741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:24,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:24,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:19:24,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349294945] [2021-11-09 09:19:24,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:19:24,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:24,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:19:24,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:19:24,162 INFO L87 Difference]: Start difference. First operand has 244 states, 229 states have (on average 1.4759825327510918) internal successors, (338), 243 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:24,208 INFO L93 Difference]: Finished difference Result 483 states and 669 transitions. [2021-11-09 09:19:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:19:24,209 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-09 09:19:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:24,222 INFO L225 Difference]: With dead ends: 483 [2021-11-09 09:19:24,223 INFO L226 Difference]: Without dead ends: 239 [2021-11-09 09:19:24,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:19:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-09 09:19:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-09 09:19:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 225 states have (on average 1.36) internal successors, (306), 238 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 306 transitions. [2021-11-09 09:19:24,297 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 306 transitions. Word has length 57 [2021-11-09 09:19:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:24,298 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 306 transitions. [2021-11-09 09:19:24,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 306 transitions. [2021-11-09 09:19:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 09:19:24,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:24,301 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2021-11-09 09:19:24,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:19:24,302 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:19:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:24,303 INFO L85 PathProgramCache]: Analyzing trace with hash -110980262, now seen corresponding path program 1 times [2021-11-09 09:19:24,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:24,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146522060] [2021-11-09 09:19:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:24,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:24,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:24,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146522060] [2021-11-09 09:19:24,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146522060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:24,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:24,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:19:24,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913551935] [2021-11-09 09:19:24,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:19:24,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:19:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:19:24,834 INFO L87 Difference]: Start difference. First operand 239 states and 306 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:25,141 INFO L93 Difference]: Finished difference Result 453 states and 580 transitions. [2021-11-09 09:19:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:19:25,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-09 09:19:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:25,143 INFO L225 Difference]: With dead ends: 453 [2021-11-09 09:19:25,143 INFO L226 Difference]: Without dead ends: 239 [2021-11-09 09:19:25,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:19:25,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-09 09:19:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-09 09:19:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 225 states have (on average 1.3466666666666667) internal successors, (303), 238 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 303 transitions. [2021-11-09 09:19:25,163 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 303 transitions. Word has length 57 [2021-11-09 09:19:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:25,164 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 303 transitions. [2021-11-09 09:19:25,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 303 transitions. [2021-11-09 09:19:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 09:19:25,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:25,167 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1] [2021-11-09 09:19:25,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:19:25,167 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:19:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash -452004592, now seen corresponding path program 1 times [2021-11-09 09:19:25,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:25,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471914759] [2021-11-09 09:19:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:25,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:25,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:25,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471914759] [2021-11-09 09:19:25,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471914759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:25,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:25,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:19:25,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693264961] [2021-11-09 09:19:25,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:19:25,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:19:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:19:25,748 INFO L87 Difference]: Start difference. First operand 239 states and 303 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:26,094 INFO L93 Difference]: Finished difference Result 407 states and 516 transitions. [2021-11-09 09:19:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:19:26,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 09:19:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:26,098 INFO L225 Difference]: With dead ends: 407 [2021-11-09 09:19:26,098 INFO L226 Difference]: Without dead ends: 239 [2021-11-09 09:19:26,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:19:26,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-09 09:19:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-09 09:19:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 225 states have (on average 1.3377777777777777) internal successors, (301), 238 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 301 transitions. [2021-11-09 09:19:26,118 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 301 transitions. Word has length 61 [2021-11-09 09:19:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:26,119 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 301 transitions. [2021-11-09 09:19:26,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 301 transitions. [2021-11-09 09:19:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 09:19:26,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:26,123 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:26,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:19:26,123 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:19:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:26,124 INFO L85 PathProgramCache]: Analyzing trace with hash 263418325, now seen corresponding path program 1 times [2021-11-09 09:19:26,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:26,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522238466] [2021-11-09 09:19:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:26,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:26,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:26,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522238466] [2021-11-09 09:19:26,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522238466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:26,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:26,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:19:26,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441537290] [2021-11-09 09:19:26,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:19:26,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:26,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:19:26,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:19:26,648 INFO L87 Difference]: Start difference. First operand 239 states and 301 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:27,058 INFO L93 Difference]: Finished difference Result 392 states and 493 transitions. [2021-11-09 09:19:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:19:27,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 09:19:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:27,061 INFO L225 Difference]: With dead ends: 392 [2021-11-09 09:19:27,062 INFO L226 Difference]: Without dead ends: 239 [2021-11-09 09:19:27,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:19:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-09 09:19:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-09 09:19:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 225 states have (on average 1.3244444444444445) internal successors, (298), 238 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 298 transitions. [2021-11-09 09:19:27,078 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 298 transitions. Word has length 63 [2021-11-09 09:19:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:27,079 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 298 transitions. [2021-11-09 09:19:27,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 298 transitions. [2021-11-09 09:19:27,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:19:27,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:27,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:27,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:19:27,083 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:19:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1353991184, now seen corresponding path program 1 times [2021-11-09 09:19:27,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:27,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772628845] [2021-11-09 09:19:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:27,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:27,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:27,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772628845] [2021-11-09 09:19:27,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772628845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:27,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:27,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:19:27,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838295383] [2021-11-09 09:19:27,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:19:27,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:19:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:19:27,631 INFO L87 Difference]: Start difference. First operand 239 states and 298 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:28,313 INFO L93 Difference]: Finished difference Result 375 states and 464 transitions. [2021-11-09 09:19:28,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:19:28,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 09:19:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:28,317 INFO L225 Difference]: With dead ends: 375 [2021-11-09 09:19:28,317 INFO L226 Difference]: Without dead ends: 239 [2021-11-09 09:19:28,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:19:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-09 09:19:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-09 09:19:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 225 states have (on average 1.32) internal successors, (297), 238 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 297 transitions. [2021-11-09 09:19:28,330 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 297 transitions. Word has length 65 [2021-11-09 09:19:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:28,333 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 297 transitions. [2021-11-09 09:19:28,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 297 transitions. [2021-11-09 09:19:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:19:28,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:28,340 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:28,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:19:28,340 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:19:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:28,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1880797653, now seen corresponding path program 1 times [2021-11-09 09:19:28,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:28,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308233018] [2021-11-09 09:19:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:28,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:29,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:29,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308233018] [2021-11-09 09:19:29,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308233018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:29,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:29,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:19:29,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196523351] [2021-11-09 09:19:29,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:19:29,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:29,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:19:29,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:19:29,259 INFO L87 Difference]: Start difference. First operand 239 states and 297 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:30,446 INFO L93 Difference]: Finished difference Result 445 states and 537 transitions. [2021-11-09 09:19:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:19:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-09 09:19:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:30,450 INFO L225 Difference]: With dead ends: 445 [2021-11-09 09:19:30,451 INFO L226 Difference]: Without dead ends: 429 [2021-11-09 09:19:30,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:19:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-09 09:19:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 259. [2021-11-09 09:19:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 245 states have (on average 1.2897959183673469) internal successors, (316), 258 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 316 transitions. [2021-11-09 09:19:30,468 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 316 transitions. Word has length 67 [2021-11-09 09:19:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:30,468 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 316 transitions. [2021-11-09 09:19:30,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 316 transitions. [2021-11-09 09:19:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 09:19:30,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:30,481 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:30,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:19:30,481 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:19:30,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:30,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1960839459, now seen corresponding path program 1 times [2021-11-09 09:19:30,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:30,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756213894] [2021-11-09 09:19:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:30,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:31,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:31,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756213894] [2021-11-09 09:19:31,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756213894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:31,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:19:31,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:19:31,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169166490] [2021-11-09 09:19:31,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:19:31,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:19:31,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:31,578 INFO L87 Difference]: Start difference. First operand 259 states and 316 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:31,904 INFO L93 Difference]: Finished difference Result 478 states and 585 transitions. [2021-11-09 09:19:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:19:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 09:19:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:31,907 INFO L225 Difference]: With dead ends: 478 [2021-11-09 09:19:31,907 INFO L226 Difference]: Without dead ends: 260 [2021-11-09 09:19:31,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:19:31,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-09 09:19:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-09 09:19:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 246 states have (on average 1.2886178861788617) internal successors, (317), 259 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 317 transitions. [2021-11-09 09:19:31,921 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 317 transitions. Word has length 71 [2021-11-09 09:19:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:31,923 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 317 transitions. [2021-11-09 09:19:31,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 317 transitions. [2021-11-09 09:19:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 09:19:31,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:31,928 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:31,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:19:31,929 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:19:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1263514824, now seen corresponding path program 1 times [2021-11-09 09:19:31,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:31,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848532096] [2021-11-09 09:19:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:31,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:33,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:33,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848532096] [2021-11-09 09:19:33,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848532096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:33,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16970436] [2021-11-09 09:19:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:33,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:33,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:33,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:33,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:19:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 3055 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:19:34,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:34,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16970436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:34,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:34,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-09 09:19:34,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871871820] [2021-11-09 09:19:34,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:19:34,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:19:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:19:34,899 INFO L87 Difference]: Start difference. First operand 260 states and 317 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:36,137 INFO L93 Difference]: Finished difference Result 692 states and 838 transitions. [2021-11-09 09:19:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:19:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-09 09:19:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:36,141 INFO L225 Difference]: With dead ends: 692 [2021-11-09 09:19:36,141 INFO L226 Difference]: Without dead ends: 474 [2021-11-09 09:19:36,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:19:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-09 09:19:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 264. [2021-11-09 09:19:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 250 states have (on average 1.288) internal successors, (322), 263 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 322 transitions. [2021-11-09 09:19:36,158 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 322 transitions. Word has length 72 [2021-11-09 09:19:36,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:36,158 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 322 transitions. [2021-11-09 09:19:36,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 322 transitions. [2021-11-09 09:19:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 09:19:36,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:36,160 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2021-11-09 09:19:36,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:36,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:36,376 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:19:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash -863838314, now seen corresponding path program 1 times [2021-11-09 09:19:36,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:36,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105741109] [2021-11-09 09:19:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:36,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:19:37,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:37,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105741109] [2021-11-09 09:19:37,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105741109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:37,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851686793] [2021-11-09 09:19:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:37,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:37,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:37,544 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:37,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:19:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:38,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 3110 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-09 09:19:38,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:39,446 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 9 treesize of output 5 [2021-11-09 09:19:40,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:19:40,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-09 09:19:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:19:40,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851686793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:19:40,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:19:40,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 15 [2021-11-09 09:19:40,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015983986] [2021-11-09 09:19:40,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:19:40,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:40,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:19:40,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:19:40,712 INFO L87 Difference]: Start difference. First operand 264 states and 322 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:58,867 INFO L93 Difference]: Finished difference Result 536 states and 652 transitions. [2021-11-09 09:19:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:19:58,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-09 09:19:58,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:58,881 INFO L225 Difference]: With dead ends: 536 [2021-11-09 09:19:58,881 INFO L226 Difference]: Without dead ends: 339 [2021-11-09 09:19:58,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:19:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-09 09:19:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 295. [2021-11-09 09:19:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 281 states have (on average 1.2740213523131672) internal successors, (358), 294 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 358 transitions. [2021-11-09 09:19:58,905 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 358 transitions. Word has length 74 [2021-11-09 09:19:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:58,906 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 358 transitions. [2021-11-09 09:19:58,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 358 transitions. [2021-11-09 09:19:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 09:19:58,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:58,908 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2021-11-09 09:19:58,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:59,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:59,124 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:19:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1874955564, now seen corresponding path program 1 times [2021-11-09 09:19:59,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:59,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430042638] [2021-11-09 09:19:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:59,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:20:00,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:00,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430042638] [2021-11-09 09:20:00,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430042638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:00,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490618301] [2021-11-09 09:20:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:00,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:00,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:00,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:00,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:20:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:01,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 3107 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:20:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:20:02,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490618301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:20:02,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:20:02,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-11-09 09:20:02,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514060282] [2021-11-09 09:20:02,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:20:02,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:02,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:20:02,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:20:02,530 INFO L87 Difference]: Start difference. First operand 295 states and 358 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:04,602 INFO L93 Difference]: Finished difference Result 570 states and 691 transitions. [2021-11-09 09:20:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:20:04,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-09 09:20:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:04,606 INFO L225 Difference]: With dead ends: 570 [2021-11-09 09:20:04,606 INFO L226 Difference]: Without dead ends: 299 [2021-11-09 09:20:04,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:20:04,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-09 09:20:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 295. [2021-11-09 09:20:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 281 states have (on average 1.2704626334519573) internal successors, (357), 294 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 357 transitions. [2021-11-09 09:20:04,626 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 357 transitions. Word has length 74 [2021-11-09 09:20:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:04,626 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 357 transitions. [2021-11-09 09:20:04,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 357 transitions. [2021-11-09 09:20:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 09:20:04,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:04,628 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:04,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:04,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:20:04,856 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:20:04,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:04,857 INFO L85 PathProgramCache]: Analyzing trace with hash -278564324, now seen corresponding path program 1 times [2021-11-09 09:20:04,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:04,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762450154] [2021-11-09 09:20:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:04,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:20:05,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:05,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762450154] [2021-11-09 09:20:05,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762450154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:05,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243269372] [2021-11-09 09:20:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:05,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:05,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:05,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:05,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:20:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:07,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 3119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:20:07,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:20:07,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243269372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:20:07,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:20:07,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-11-09 09:20:07,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135103594] [2021-11-09 09:20:07,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:20:07,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:20:07,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:20:07,830 INFO L87 Difference]: Start difference. First operand 295 states and 357 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:09,180 INFO L93 Difference]: Finished difference Result 693 states and 822 transitions. [2021-11-09 09:20:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:20:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-09 09:20:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:09,184 INFO L225 Difference]: With dead ends: 693 [2021-11-09 09:20:09,184 INFO L226 Difference]: Without dead ends: 401 [2021-11-09 09:20:09,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:20:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-09 09:20:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 295. [2021-11-09 09:20:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 281 states have (on average 1.2526690391459074) internal successors, (352), 294 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) [2021-11-09 09:20:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 352 transitions. [2021-11-09 09:20:09,205 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 352 transitions. Word has length 78 [2021-11-09 09:20:09,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:09,206 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 352 transitions. [2021-11-09 09:20:09,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 352 transitions. [2021-11-09 09:20:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 09:20:09,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:09,207 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:09,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:09,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:20:09,427 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:20:09,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash 237374563, now seen corresponding path program 1 times [2021-11-09 09:20:09,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:09,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835011509] [2021-11-09 09:20:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:09,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:20:10,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:10,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835011509] [2021-11-09 09:20:10,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835011509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:20:10,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:20:10,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:20:10,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475235022] [2021-11-09 09:20:10,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:20:10,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:20:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:20:10,684 INFO L87 Difference]: Start difference. First operand 295 states and 352 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:11,270 INFO L93 Difference]: Finished difference Result 583 states and 696 transitions. [2021-11-09 09:20:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:20:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 09:20:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:11,273 INFO L225 Difference]: With dead ends: 583 [2021-11-09 09:20:11,273 INFO L226 Difference]: Without dead ends: 295 [2021-11-09 09:20:11,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:20:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-09 09:20:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2021-11-09 09:20:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 281 states have (on average 1.2491103202846976) internal successors, (351), 294 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 351 transitions. [2021-11-09 09:20:11,291 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 351 transitions. Word has length 80 [2021-11-09 09:20:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:11,291 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 351 transitions. [2021-11-09 09:20:11,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 351 transitions. [2021-11-09 09:20:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 09:20:11,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:11,293 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:11,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:20:11,294 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:20:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1386433563, now seen corresponding path program 1 times [2021-11-09 09:20:11,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:11,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414045254] [2021-11-09 09:20:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:11,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:20:12,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:12,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414045254] [2021-11-09 09:20:12,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414045254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:12,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194623673] [2021-11-09 09:20:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:12,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:12,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:12,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:12,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:20:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:13,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 3151 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 09:20:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:16,168 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 62 treesize of output 54 [2021-11-09 09:20:16,178 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 51 treesize of output 43 [2021-11-09 09:20:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:20:16,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194623673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:20:16,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:20:16,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 14 [2021-11-09 09:20:16,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25135227] [2021-11-09 09:20:16,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:20:16,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:20:16,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:20:16,787 INFO L87 Difference]: Start difference. First operand 295 states and 351 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:34,298 INFO L93 Difference]: Finished difference Result 628 states and 748 transitions. [2021-11-09 09:20:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:20:34,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-09 09:20:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:34,301 INFO L225 Difference]: With dead ends: 628 [2021-11-09 09:20:34,301 INFO L226 Difference]: Without dead ends: 372 [2021-11-09 09:20:34,302 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:20:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-09 09:20:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 312. [2021-11-09 09:20:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 298 states have (on average 1.238255033557047) internal successors, (369), 311 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 369 transitions. [2021-11-09 09:20:34,322 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 369 transitions. Word has length 83 [2021-11-09 09:20:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:34,322 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 369 transitions. [2021-11-09 09:20:34,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:34,323 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 369 transitions. [2021-11-09 09:20:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 09:20:34,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:34,324 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:34,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:34,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:20:34,540 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:20:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:34,541 INFO L85 PathProgramCache]: Analyzing trace with hash -432493405, now seen corresponding path program 1 times [2021-11-09 09:20:34,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:34,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816589834] [2021-11-09 09:20:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:34,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:20:34,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:34,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816589834] [2021-11-09 09:20:34,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816589834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:20:34,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:20:34,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:20:34,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973211426] [2021-11-09 09:20:34,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:20:34,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:34,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:20:34,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:20:34,790 INFO L87 Difference]: Start difference. First operand 312 states and 369 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:35,379 INFO L93 Difference]: Finished difference Result 627 states and 742 transitions. [2021-11-09 09:20:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:20:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-09 09:20:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:35,383 INFO L225 Difference]: With dead ends: 627 [2021-11-09 09:20:35,383 INFO L226 Difference]: Without dead ends: 343 [2021-11-09 09:20:35,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:20:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-09 09:20:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 307. [2021-11-09 09:20:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 293 states have (on average 1.2184300341296928) internal successors, (357), 306 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2021-11-09 09:20:35,402 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 83 [2021-11-09 09:20:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:35,403 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2021-11-09 09:20:35,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2021-11-09 09:20:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-09 09:20:35,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:35,405 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:35,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:20:35,405 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:20:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:35,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1561679628, now seen corresponding path program 1 times [2021-11-09 09:20:35,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:35,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350234455] [2021-11-09 09:20:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:35,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:20:36,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:36,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350234455] [2021-11-09 09:20:36,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350234455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:20:36,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:20:36,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:20:36,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938889924] [2021-11-09 09:20:36,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:20:36,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:36,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:20:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:20:36,443 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:41,925 INFO L93 Difference]: Finished difference Result 600 states and 699 transitions. [2021-11-09 09:20:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:20:41,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-09 09:20:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:41,930 INFO L225 Difference]: With dead ends: 600 [2021-11-09 09:20:41,930 INFO L226 Difference]: Without dead ends: 307 [2021-11-09 09:20:41,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:20:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-09 09:20:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-11-09 09:20:41,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 293 states have (on average 1.2150170648464165) internal successors, (356), 306 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 356 transitions. [2021-11-09 09:20:41,958 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 356 transitions. Word has length 86 [2021-11-09 09:20:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:41,958 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 356 transitions. [2021-11-09 09:20:41,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 356 transitions. [2021-11-09 09:20:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 09:20:41,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:41,968 INFO L513 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:41,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:20:41,971 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:20:41,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:41,972 INFO L85 PathProgramCache]: Analyzing trace with hash 471597132, now seen corresponding path program 1 times [2021-11-09 09:20:41,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:41,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322578121] [2021-11-09 09:20:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:41,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:20:43,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:43,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322578121] [2021-11-09 09:20:43,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322578121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:43,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638599024] [2021-11-09 09:20:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:43,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:43,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:43,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:20:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:44,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 3192 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-09 09:20:44,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:44,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:20:45,183 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:20:45,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 09:20:45,767 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 09:20:45,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 09:20:46,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-09 09:20:47,840 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 57 treesize of output 45 [2021-11-09 09:20:48,131 INFO L354 Elim1Store]: treesize reduction 160, result has 22.0 percent of original size [2021-11-09 09:20:48,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 43 treesize of output 73 [2021-11-09 09:20:48,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-09 09:20:49,704 INFO L354 Elim1Store]: treesize reduction 276, result has 17.1 percent of original size [2021-11-09 09:20:49,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 135 treesize of output 167 [2021-11-09 09:20:50,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:50,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:50,235 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-09 09:20:50,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 38 [2021-11-09 09:20:50,693 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-11-09 09:20:50,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 96 treesize of output 54 [2021-11-09 09:21:00,321 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-09 09:21:00,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 132 treesize of output 140 [2021-11-09 09:21:04,532 INFO L354 Elim1Store]: treesize reduction 482, result has 9.2 percent of original size [2021-11-09 09:21:04,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 118 treesize of output 116 [2021-11-09 09:21:04,782 INFO L354 Elim1Store]: treesize reduction 446, result has 9.9 percent of original size [2021-11-09 09:21:04,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 116 treesize of output 133 [2021-11-09 09:21:06,784 INFO L354 Elim1Store]: treesize reduction 482, result has 9.2 percent of original size [2021-11-09 09:21:06,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 118 treesize of output 116 [2021-11-09 09:21:07,107 INFO L354 Elim1Store]: treesize reduction 446, result has 9.9 percent of original size [2021-11-09 09:21:07,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 116 treesize of output 133 [2021-11-09 09:21:10,066 INFO L354 Elim1Store]: treesize reduction 482, result has 9.2 percent of original size [2021-11-09 09:21:10,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 105 treesize of output 103 [2021-11-09 09:21:17,678 INFO L354 Elim1Store]: treesize reduction 446, result has 11.2 percent of original size [2021-11-09 09:21:17,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 101 treesize of output 114 [2021-11-09 09:21:21,024 INFO L354 Elim1Store]: treesize reduction 266, result has 22.2 percent of original size [2021-11-09 09:21:21,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 103 treesize of output 132 [2021-11-09 09:21:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:21:21,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638599024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:21,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:21,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 18] total 21 [2021-11-09 09:21:21,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58196886] [2021-11-09 09:21:21,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:21:21,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:21:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=349, Unknown=2, NotChecked=0, Total=420 [2021-11-09 09:21:21,603 INFO L87 Difference]: Start difference. First operand 307 states and 356 transitions. Second operand has 21 states, 21 states have (on average 6.619047619047619) internal successors, (139), 21 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:22:15,061 WARN L207 SmtUtils]: Spent 8.70 s on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2021-11-09 09:26:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:26:08,234 INFO L93 Difference]: Finished difference Result 624 states and 731 transitions. [2021-11-09 09:26:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:26:08,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.619047619047619) internal successors, (139), 21 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-09 09:26:08,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:26:08,238 INFO L225 Difference]: With dead ends: 624 [2021-11-09 09:26:08,238 INFO L226 Difference]: Without dead ends: 360 [2021-11-09 09:26:08,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 115.8s TimeCoverageRelationStatistics Valid=387, Invalid=1225, Unknown=28, NotChecked=0, Total=1640 [2021-11-09 09:26:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-09 09:26:08,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 316. [2021-11-09 09:26:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 302 states have (on average 1.2152317880794703) internal successors, (367), 315 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:26:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 367 transitions. [2021-11-09 09:26:08,260 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 367 transitions. Word has length 89 [2021-11-09 09:26:08,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:26:08,260 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 367 transitions. [2021-11-09 09:26:08,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.619047619047619) internal successors, (139), 21 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:26:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 367 transitions. [2021-11-09 09:26:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-09 09:26:08,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:26:08,263 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:26:08,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 09:26:08,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:26:08,476 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:26:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:26:08,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1806538862, now seen corresponding path program 2 times [2021-11-09 09:26:08,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:26:08,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011308545] [2021-11-09 09:26:08,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:26:08,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:26:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:26:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:26:09,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:26:09,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011308545] [2021-11-09 09:26:09,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011308545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:26:09,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962183526] [2021-11-09 09:26:09,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:26:09,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:26:09,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:26:09,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:26:09,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:29:34,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 09:29:34,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:34,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 3093 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-09 09:29:34,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:34,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:29:34,688 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:29:34,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 09:29:34,822 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:29:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 09:29:35,486 INFO L354 Elim1Store]: treesize reduction 82, result has 16.3 percent of original size [2021-11-09 09:29:35,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 31 [2021-11-09 09:29:35,877 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-09 09:29:35,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-09 09:29:36,770 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-11-09 09:29:36,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 45 [2021-11-09 09:29:39,666 INFO L354 Elim1Store]: treesize reduction 120, result has 23.6 percent of original size [2021-11-09 09:29:39,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 44 treesize of output 69 [2021-11-09 09:29:41,172 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-09 09:29:41,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 56 [2021-11-09 09:29:41,388 INFO L354 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2021-11-09 09:29:41,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-09 09:29:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:29:41,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962183526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:29:41,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:29:41,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2021-11-09 09:29:41,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774045003] [2021-11-09 09:29:41,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:29:41,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:29:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:29:41,911 INFO L87 Difference]: Start difference. First operand 316 states and 367 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:30:23,296 INFO L93 Difference]: Finished difference Result 682 states and 800 transitions. [2021-11-09 09:30:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:30:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-09 09:30:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:30:23,301 INFO L225 Difference]: With dead ends: 682 [2021-11-09 09:30:23,301 INFO L226 Difference]: Without dead ends: 509 [2021-11-09 09:30:23,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=300, Invalid=1506, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:30:23,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-09 09:30:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 341. [2021-11-09 09:30:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 327 states have (on average 1.2110091743119267) internal successors, (396), 340 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 396 transitions. [2021-11-09 09:30:23,334 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 396 transitions. Word has length 91 [2021-11-09 09:30:23,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:30:23,334 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 396 transitions. [2021-11-09 09:30:23,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 396 transitions. [2021-11-09 09:30:23,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-09 09:30:23,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:30:23,336 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:30:23,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:30:23,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:30:23,560 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:30:23,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:30:23,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1689038829, now seen corresponding path program 1 times [2021-11-09 09:30:23,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:30:23,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900488084] [2021-11-09 09:30:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:23,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:30:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:30:25,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:30:25,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900488084] [2021-11-09 09:30:25,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900488084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:25,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731508157] [2021-11-09 09:30:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:25,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:25,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:30:25,433 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:30:25,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:30:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:26,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 3278 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:30:26,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:30:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:30:27,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731508157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:27,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:30:27,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-09 09:30:27,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237479730] [2021-11-09 09:30:27,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:30:27,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:30:27,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:30:27,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:30:27,216 INFO L87 Difference]: Start difference. First operand 341 states and 396 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:30:28,991 INFO L93 Difference]: Finished difference Result 684 states and 800 transitions. [2021-11-09 09:30:28,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:30:28,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-09 09:30:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:30:29,002 INFO L225 Difference]: With dead ends: 684 [2021-11-09 09:30:29,002 INFO L226 Difference]: Without dead ends: 387 [2021-11-09 09:30:29,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:30:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-09 09:30:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 303. [2021-11-09 09:30:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 289 states have (on average 1.2145328719723183) internal successors, (351), 302 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 351 transitions. [2021-11-09 09:30:29,032 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 351 transitions. Word has length 92 [2021-11-09 09:30:29,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:30:29,032 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 351 transitions. [2021-11-09 09:30:29,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:29,032 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 351 transitions. [2021-11-09 09:30:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:30:29,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:30:29,034 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 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, 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] [2021-11-09 09:30:29,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:30:29,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:30:29,244 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:30:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:30:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2054735203, now seen corresponding path program 1 times [2021-11-09 09:30:29,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:30:29,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141788196] [2021-11-09 09:30:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:29,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:30:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 09:30:29,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:30:29,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141788196] [2021-11-09 09:30:29,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141788196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:30:29,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:30:29,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:30:29,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760797186] [2021-11-09 09:30:29,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:30:29,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:30:29,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:30:29,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:30:29,573 INFO L87 Difference]: Start difference. First operand 303 states and 351 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:30:29,837 INFO L93 Difference]: Finished difference Result 446 states and 519 transitions. [2021-11-09 09:30:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:30:29,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 09:30:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:30:29,840 INFO L225 Difference]: With dead ends: 446 [2021-11-09 09:30:29,840 INFO L226 Difference]: Without dead ends: 303 [2021-11-09 09:30:29,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:30:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-09 09:30:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-11-09 09:30:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 289 states have (on average 1.2110726643598615) internal successors, (350), 302 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) [2021-11-09 09:30:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 350 transitions. [2021-11-09 09:30:29,864 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 350 transitions. Word has length 98 [2021-11-09 09:30:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:30:29,865 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 350 transitions. [2021-11-09 09:30:29,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 350 transitions. [2021-11-09 09:30:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:30:29,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:30:29,866 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 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, 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] [2021-11-09 09:30:29,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:30:29,867 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:30:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:30:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash 81604386, now seen corresponding path program 1 times [2021-11-09 09:30:29,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:30:29,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755525224] [2021-11-09 09:30:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:29,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:30:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:30:32,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:30:32,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755525224] [2021-11-09 09:30:32,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755525224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:32,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038828715] [2021-11-09 09:30:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:32,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:32,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:30:32,733 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:30:32,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:30:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:34,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 3328 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:30:34,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:30:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 09:30:34,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038828715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:30:34,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:30:34,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-09 09:30:34,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135144998] [2021-11-09 09:30:34,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:30:34,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:30:34,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:30:34,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:30:34,682 INFO L87 Difference]: Start difference. First operand 303 states and 350 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:30:41,294 INFO L93 Difference]: Finished difference Result 660 states and 767 transitions. [2021-11-09 09:30:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:30:41,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 09:30:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:30:41,298 INFO L225 Difference]: With dead ends: 660 [2021-11-09 09:30:41,298 INFO L226 Difference]: Without dead ends: 379 [2021-11-09 09:30:41,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:30:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-09 09:30:41,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 303. [2021-11-09 09:30:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 289 states have (on average 1.1730103806228374) internal successors, (339), 302 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:41,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 339 transitions. [2021-11-09 09:30:41,357 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 339 transitions. Word has length 98 [2021-11-09 09:30:41,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:30:41,357 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 339 transitions. [2021-11-09 09:30:41,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 339 transitions. [2021-11-09 09:30:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-09 09:30:41,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:30:41,359 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 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, 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] [2021-11-09 09:30:41,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:30:41,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:41,564 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:30:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:30:41,565 INFO L85 PathProgramCache]: Analyzing trace with hash 505251108, now seen corresponding path program 1 times [2021-11-09 09:30:41,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:30:41,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936907979] [2021-11-09 09:30:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:41,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:30:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:30:42,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:30:42,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936907979] [2021-11-09 09:30:42,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936907979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:42,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288183117] [2021-11-09 09:30:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:42,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:42,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:30:42,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:30:42,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:30:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 3333 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:30:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:30:44,998 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 10 treesize of output 6 [2021-11-09 09:30:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 09:30:45,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288183117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:30:45,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:30:45,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-09 09:30:45,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041369898] [2021-11-09 09:30:45,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:30:45,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:30:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:30:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:30:45,193 INFO L87 Difference]: Start difference. First operand 303 states and 339 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:30:54,090 INFO L93 Difference]: Finished difference Result 541 states and 610 transitions. [2021-11-09 09:30:54,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:30:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-09 09:30:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:30:54,092 INFO L225 Difference]: With dead ends: 541 [2021-11-09 09:30:54,093 INFO L226 Difference]: Without dead ends: 335 [2021-11-09 09:30:54,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:30:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-09 09:30:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 278. [2021-11-09 09:30:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 277 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 310 transitions. [2021-11-09 09:30:54,121 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 310 transitions. Word has length 98 [2021-11-09 09:30:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:30:54,122 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 310 transitions. [2021-11-09 09:30:54,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 310 transitions. [2021-11-09 09:30:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-09 09:30:54,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:30:54,124 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 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, 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] [2021-11-09 09:30:54,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:30:54,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 09:30:54,340 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-09 09:30:54,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:30:54,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1126364626, now seen corresponding path program 1 times [2021-11-09 09:30:54,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:30:54,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388817077] [2021-11-09 09:30:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:54,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:30:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:30:56,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:30:56,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388817077] [2021-11-09 09:30:56,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388817077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:56,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964353871] [2021-11-09 09:30:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:56,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:56,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:30:56,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:30:56,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d14b662a-4bad-4ef1-8ee1-62fd2ee2a676/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:30:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:58,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 3327 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-09 09:30:58,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:30:58,906 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-09 09:30:58,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 29 [2021-11-09 09:30:59,826 INFO L354 Elim1Store]: treesize reduction 212, result has 36.3 percent of original size [2021-11-09 09:30:59,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 102 treesize of output 194 [2021-11-09 09:31:16,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:31:16,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:31:16,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:31:16,761 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-11-09 09:31:16,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 333 treesize of output 285 [2021-11-09 09:31:21,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:31:21,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:31:21,997 INFO L354 Elim1Store]: treesize reduction 68, result has 37.6 percent of original size [2021-11-09 09:31:21,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 346 treesize of output 308 [2021-11-09 09:31:49,249 INFO L354 Elim1Store]: treesize reduction 46, result has 37.0 percent of original size [2021-11-09 09:31:49,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 141