./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc --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 b1e17fda858e874821809b4efef78fd91cf6fdf1723d3ff0faf91ee901e13b86 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:17:28,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:17:28,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:17:28,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:17:28,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:17:28,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:17:28,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:17:28,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:17:28,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:17:28,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:17:28,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:17:28,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:17:28,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:17:28,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:17:28,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:17:28,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:17:28,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:17:28,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:17:28,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:17:28,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:17:28,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:17:28,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:17:28,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:17:28,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:17:29,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:17:29,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:17:29,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:17:29,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:17:29,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:17:29,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:17:29,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:17:29,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:17:29,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:17:29,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:17:29,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:17:29,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:17:29,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:17:29,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:17:29,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:17:29,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:17:29,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:17:29,019 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:17:29,072 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:17:29,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:17:29,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:17:29,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:17:29,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:17:29,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:17:29,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:17:29,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:17:29,076 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:17:29,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:17:29,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:17:29,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:17:29,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:17:29,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:17:29,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:17:29,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:17:29,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:17:29,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:17:29,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:17:29,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:17:29,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:17:29,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:17:29,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:17:29,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:17:29,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:17:29,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:17:29,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:17:29,085 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:17:29,086 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:17:29,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:17:29,086 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_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e17fda858e874821809b4efef78fd91cf6fdf1723d3ff0faf91ee901e13b86 [2022-11-02 20:17:29,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:17:29,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:17:29,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:17:29,452 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:17:29,453 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:17:29,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i [2022-11-02 20:17:29,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/data/cd4305685/508abe9a3d0c4972afae081827bb36bb/FLAGe3f569d34 [2022-11-02 20:17:30,447 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:17:30,447 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i [2022-11-02 20:17:30,523 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/data/cd4305685/508abe9a3d0c4972afae081827bb36bb/FLAGe3f569d34 [2022-11-02 20:17:30,921 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/data/cd4305685/508abe9a3d0c4972afae081827bb36bb [2022-11-02 20:17:30,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:17:30,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:17:30,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:17:30,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:17:30,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:17:30,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:17:30" (1/1) ... [2022-11-02 20:17:30,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4978d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:30, skipping insertion in model container [2022-11-02 20:17:30,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:17:30" (1/1) ... [2022-11-02 20:17:30,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:17:31,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:17:31,359 WARN L230 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_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4501,4514] [2022-11-02 20:17:31,367 WARN L230 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_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4561,4574] [2022-11-02 20:17:32,430 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:32,437 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:32,438 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:32,440 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:32,442 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:32,461 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:32,469 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:32,471 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:32,472 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:32,880 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:17:32,882 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:17:32,883 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:17:32,884 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:17:32,886 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:17:32,887 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:17:32,888 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:17:32,889 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:17:32,889 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:17:32,890 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:17:33,176 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:17:33,214 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,214 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,297 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,298 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:17:33,486 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:17:33,518 WARN L230 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_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4501,4514] [2022-11-02 20:17:33,520 WARN L230 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_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4561,4574] [2022-11-02 20:17:33,574 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,576 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,577 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,578 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,580 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,602 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,602 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,605 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,606 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,669 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:17:33,670 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:17:33,671 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:17:33,672 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:17:33,673 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:17:33,674 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:17:33,675 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:17:33,675 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:17:33,676 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:17:33,676 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:17:33,711 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:17:33,733 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,734 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,798 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,798 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:17:33,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:17:34,120 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:17:34,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34 WrapperNode [2022-11-02 20:17:34,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:17:34,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:17:34,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:17:34,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:17:34,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,367 INFO L138 Inliner]: procedures = 691, calls = 2637, calls flagged for inlining = 61, calls inlined = 11, statements flattened = 1065 [2022-11-02 20:17:34,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:17:34,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:17:34,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:17:34,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:17:34,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,450 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:17:34,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:17:34,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:17:34,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:17:34,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (1/1) ... [2022-11-02 20:17:34,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:17:34,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:17:34,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:17:34,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:17:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-02 20:17:34,563 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-02 20:17:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-02 20:17:34,564 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-02 20:17:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:17:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-02 20:17:34,565 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-02 20:17:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-11-02 20:17:34,566 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-11-02 20:17:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:17:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-02 20:17:34,567 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-02 20:17:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:17:34,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:17:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:17:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:17:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:17:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2022-11-02 20:17:34,568 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2022-11-02 20:17:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:17:34,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:17:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-02 20:17:34,570 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-02 20:17:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-11-02 20:17:34,570 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-11-02 20:17:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-02 20:17:34,571 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-02 20:17:34,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:17:34,572 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:17:34,572 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2022-11-02 20:17:34,572 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2022-11-02 20:17:34,572 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2022-11-02 20:17:34,572 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2022-11-02 20:17:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:17:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-11-02 20:17:34,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-11-02 20:17:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:17:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:17:34,573 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-02 20:17:34,574 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-02 20:17:34,574 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-11-02 20:17:34,574 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-11-02 20:17:34,575 INFO L130 BoogieDeclarations]: Found specification of procedure assert_bytes_match [2022-11-02 20:17:34,575 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_bytes_match [2022-11-02 20:17:34,592 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-02 20:17:34,592 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-02 20:17:34,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:17:34,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:17:35,027 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:17:35,029 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:17:36,667 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:17:36,683 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:17:36,684 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:17:36,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:17:36 BoogieIcfgContainer [2022-11-02 20:17:36,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:17:36,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:17:36,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:17:36,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:17:36,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:17:30" (1/3) ... [2022-11-02 20:17:36,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c2412b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:17:36, skipping insertion in model container [2022-11-02 20:17:36,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:34" (2/3) ... [2022-11-02 20:17:36,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c2412b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:17:36, skipping insertion in model container [2022-11-02 20:17:36,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:17:36" (3/3) ... [2022-11-02 20:17:36,702 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_append_dynamic_harness.i [2022-11-02 20:17:36,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:17:36,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:17:36,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:17:36,822 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12644ee0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:17:36,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:17:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 248 states, 156 states have (on average 1.2371794871794872) internal successors, (193), 157 states have internal predecessors, (193), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-02 20:17:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 20:17:36,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:36,849 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:36,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:17:36,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:36,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1072542744, now seen corresponding path program 1 times [2022-11-02 20:17:36,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:36,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821103104] [2022-11-02 20:17:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:36,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:17:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:17:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:17:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:17:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:17:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:17:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-02 20:17:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:17:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 20:17:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 20:17:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-02 20:17:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-02 20:17:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-02 20:17:37,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:17:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821103104] [2022-11-02 20:17:37,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821103104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:17:37,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:17:37,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:17:37,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21821775] [2022-11-02 20:17:37,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:17:37,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:17:37,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:17:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:17:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:17:37,884 INFO L87 Difference]: Start difference. First operand has 248 states, 156 states have (on average 1.2371794871794872) internal successors, (193), 157 states have internal predecessors, (193), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 20:17:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:17:38,423 INFO L93 Difference]: Finished difference Result 500 states and 722 transitions. [2022-11-02 20:17:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:17:38,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 83 [2022-11-02 20:17:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:17:38,442 INFO L225 Difference]: With dead ends: 500 [2022-11-02 20:17:38,443 INFO L226 Difference]: Without dead ends: 255 [2022-11-02 20:17:38,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:17:38,451 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 97 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:17:38,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 405 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:17:38,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-02 20:17:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2022-11-02 20:17:38,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 152 states have (on average 1.2171052631578947) internal successors, (185), 153 states have internal predecessors, (185), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-02 20:17:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 328 transitions. [2022-11-02 20:17:38,522 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 328 transitions. Word has length 83 [2022-11-02 20:17:38,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:17:38,523 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 328 transitions. [2022-11-02 20:17:38,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 20:17:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 328 transitions. [2022-11-02 20:17:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-02 20:17:38,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:38,527 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:38,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:17:38,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:17:38,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2014404208, now seen corresponding path program 1 times [2022-11-02 20:17:38,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:38,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567555008] [2022-11-02 20:17:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:38,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:17:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:17:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:17:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:17:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:17:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:17:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-02 20:17:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:17:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 20:17:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 20:17:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-02 20:17:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-02 20:17:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-02 20:17:39,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:17:39,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567555008] [2022-11-02 20:17:39,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567555008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:17:39,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253081034] [2022-11-02 20:17:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:39,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:17:39,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:17:39,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:17:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:17:40,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:17:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:17:40,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:17:40,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253081034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:17:40,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:17:40,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-02 20:17:40,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504356724] [2022-11-02 20:17:40,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:17:40,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:17:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:17:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:17:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:17:40,278 INFO L87 Difference]: Start difference. First operand 243 states and 328 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 20:17:40,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:17:40,707 INFO L93 Difference]: Finished difference Result 478 states and 649 transitions. [2022-11-02 20:17:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:17:40,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 85 [2022-11-02 20:17:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:17:40,711 INFO L225 Difference]: With dead ends: 478 [2022-11-02 20:17:40,711 INFO L226 Difference]: Without dead ends: 246 [2022-11-02 20:17:40,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:17:40,713 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 371 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:17:40,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 963 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:17:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-02 20:17:40,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-11-02 20:17:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 154 states have (on average 1.2142857142857142) internal successors, (187), 156 states have internal predecessors, (187), 72 states have call successors, (72), 18 states have call predecessors, (72), 19 states have return successors, (76), 71 states have call predecessors, (76), 71 states have call successors, (76) [2022-11-02 20:17:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 335 transitions. [2022-11-02 20:17:40,779 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 335 transitions. Word has length 85 [2022-11-02 20:17:40,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:17:40,779 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 335 transitions. [2022-11-02 20:17:40,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 20:17:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 335 transitions. [2022-11-02 20:17:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 20:17:40,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:40,782 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:40,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:17:41,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:41,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:17:41,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:41,007 INFO L85 PathProgramCache]: Analyzing trace with hash -756708827, now seen corresponding path program 1 times [2022-11-02 20:17:41,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:41,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272927935] [2022-11-02 20:17:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:41,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:17:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:17:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:17:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:17:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:17:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:17:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:17:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 20:17:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 20:17:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-02 20:17:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-02 20:17:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:17:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-02 20:17:41,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:17:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272927935] [2022-11-02 20:17:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272927935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:17:41,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235370945] [2022-11-02 20:17:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:41,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:41,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:17:41,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:17:41,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:17:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:17:42,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:17:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:17:42,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:17:42,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235370945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:17:42,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:17:42,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-11-02 20:17:42,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063149012] [2022-11-02 20:17:42,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:17:42,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:17:42,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:17:42,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:17:42,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:17:42,566 INFO L87 Difference]: Start difference. First operand 246 states and 335 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 20:17:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:17:43,031 INFO L93 Difference]: Finished difference Result 469 states and 634 transitions. [2022-11-02 20:17:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:17:43,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 91 [2022-11-02 20:17:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:17:43,035 INFO L225 Difference]: With dead ends: 469 [2022-11-02 20:17:43,035 INFO L226 Difference]: Without dead ends: 243 [2022-11-02 20:17:43,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:17:43,037 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 429 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:17:43,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 1122 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:17:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-02 20:17:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-11-02 20:17:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 152 states have (on average 1.2105263157894737) internal successors, (184), 153 states have internal predecessors, (184), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-02 20:17:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 327 transitions. [2022-11-02 20:17:43,066 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 327 transitions. Word has length 91 [2022-11-02 20:17:43,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:17:43,072 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 327 transitions. [2022-11-02 20:17:43,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 7 states have internal predecessors, (55), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 20:17:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 327 transitions. [2022-11-02 20:17:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 20:17:43,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:43,077 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:43,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:17:43,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:43,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:17:43,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:43,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1459419536, now seen corresponding path program 1 times [2022-11-02 20:17:43,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:43,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98653667] [2022-11-02 20:17:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:43,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:17:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:17:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:17:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:17:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:17:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:17:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:17:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 20:17:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 20:17:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-02 20:17:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:17:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-02 20:17:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-02 20:17:43,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:17:43,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98653667] [2022-11-02 20:17:43,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98653667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:17:43,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75871805] [2022-11-02 20:17:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:43,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:43,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:17:43,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:17:43,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:17:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:44,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:17:44,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:17:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:17:44,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:17:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-02 20:17:44,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75871805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:17:44,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:17:44,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-02 20:17:44,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899596536] [2022-11-02 20:17:44,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:17:44,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:17:44,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:17:44,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:17:44,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:17:44,836 INFO L87 Difference]: Start difference. First operand 243 states and 327 transitions. Second operand has 12 states, 12 states have (on average 9.0) internal successors, (108), 11 states have internal predecessors, (108), 7 states have call successors, (31), 4 states have call predecessors, (31), 5 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2022-11-02 20:17:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:17:45,840 INFO L93 Difference]: Finished difference Result 481 states and 648 transitions. [2022-11-02 20:17:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:17:45,841 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 11 states have internal predecessors, (108), 7 states have call successors, (31), 4 states have call predecessors, (31), 5 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) Word has length 97 [2022-11-02 20:17:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:17:45,843 INFO L225 Difference]: With dead ends: 481 [2022-11-02 20:17:45,843 INFO L226 Difference]: Without dead ends: 258 [2022-11-02 20:17:45,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:17:45,845 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 456 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:17:45,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 716 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:17:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-02 20:17:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 246. [2022-11-02 20:17:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 154 states have (on average 1.2077922077922079) internal successors, (186), 156 states have internal predecessors, (186), 72 states have call successors, (72), 18 states have call predecessors, (72), 19 states have return successors, (76), 71 states have call predecessors, (76), 71 states have call successors, (76) [2022-11-02 20:17:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 334 transitions. [2022-11-02 20:17:45,869 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 334 transitions. Word has length 97 [2022-11-02 20:17:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:17:45,869 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 334 transitions. [2022-11-02 20:17:45,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 11 states have internal predecessors, (108), 7 states have call successors, (31), 4 states have call predecessors, (31), 5 states have return successors, (30), 7 states have call predecessors, (30), 7 states have call successors, (30) [2022-11-02 20:17:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 334 transitions. [2022-11-02 20:17:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-02 20:17:45,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:45,871 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:45,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:17:46,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:46,086 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:17:46,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:46,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2034657995, now seen corresponding path program 1 times [2022-11-02 20:17:46,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:46,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391702439] [2022-11-02 20:17:46,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:46,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:17:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:17:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:17:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:17:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:17:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:17:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:17:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:17:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:17:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:17:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-02 20:17:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-02 20:17:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-02 20:17:46,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:17:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391702439] [2022-11-02 20:17:46,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391702439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:17:46,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:17:46,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:17:46,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805729936] [2022-11-02 20:17:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:17:46,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:17:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:17:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:17:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:17:46,866 INFO L87 Difference]: Start difference. First operand 246 states and 334 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 20:17:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:17:47,684 INFO L93 Difference]: Finished difference Result 478 states and 642 transitions. [2022-11-02 20:17:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:17:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 99 [2022-11-02 20:17:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:17:47,687 INFO L225 Difference]: With dead ends: 478 [2022-11-02 20:17:47,687 INFO L226 Difference]: Without dead ends: 255 [2022-11-02 20:17:47,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:17:47,689 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 239 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:17:47,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 699 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:17:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-02 20:17:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2022-11-02 20:17:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 153 states have internal predecessors, (183), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-02 20:17:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 326 transitions. [2022-11-02 20:17:47,710 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 326 transitions. Word has length 99 [2022-11-02 20:17:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:17:47,711 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 326 transitions. [2022-11-02 20:17:47,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 20:17:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 326 transitions. [2022-11-02 20:17:47,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-02 20:17:47,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:47,713 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:47,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:17:47,714 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:17:47,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:47,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1162403066, now seen corresponding path program 1 times [2022-11-02 20:17:47,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:47,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791900050] [2022-11-02 20:17:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:17:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:17:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:17:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:17:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:17:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:17:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:17:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:17:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:17:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:17:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-02 20:17:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:17:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-02 20:17:49,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:17:49,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791900050] [2022-11-02 20:17:49,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791900050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:17:49,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376919979] [2022-11-02 20:17:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:49,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:49,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:17:49,442 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:17:49,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:17:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:17:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:17:50,071 INFO L390 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 6 treesize of output 5 [2022-11-02 20:17:51,076 INFO L390 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 26 treesize of output 14 [2022-11-02 20:17:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 20:17:51,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:17:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-02 20:17:51,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376919979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:17:51,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:17:51,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 17 [2022-11-02 20:17:51,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160356754] [2022-11-02 20:17:51,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:17:51,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:17:51,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:17:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:17:51,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:17:51,375 INFO L87 Difference]: Start difference. First operand 243 states and 326 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 14 states have internal predecessors, (90), 8 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-02 20:17:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:17:55,173 INFO L93 Difference]: Finished difference Result 608 states and 831 transitions. [2022-11-02 20:17:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 20:17:55,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 14 states have internal predecessors, (90), 8 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 101 [2022-11-02 20:17:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:17:55,178 INFO L225 Difference]: With dead ends: 608 [2022-11-02 20:17:55,178 INFO L226 Difference]: Without dead ends: 401 [2022-11-02 20:17:55,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 208 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:17:55,180 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 285 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:17:55,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1866 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2371 Invalid, 0 Unknown, 589 Unchecked, 3.0s Time] [2022-11-02 20:17:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-11-02 20:17:55,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 290. [2022-11-02 20:17:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 189 states have (on average 1.2063492063492063) internal successors, (228), 190 states have internal predecessors, (228), 78 states have call successors, (78), 21 states have call predecessors, (78), 22 states have return successors, (85), 78 states have call predecessors, (85), 77 states have call successors, (85) [2022-11-02 20:17:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 391 transitions. [2022-11-02 20:17:55,218 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 391 transitions. Word has length 101 [2022-11-02 20:17:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:17:55,219 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 391 transitions. [2022-11-02 20:17:55,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 14 states have internal predecessors, (90), 8 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-02 20:17:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 391 transitions. [2022-11-02 20:17:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-02 20:17:55,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:55,221 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:55,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:17:55,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:17:55,439 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:17:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:55,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1694138625, now seen corresponding path program 1 times [2022-11-02 20:17:55,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:55,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110279197] [2022-11-02 20:17:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:55,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:17:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:17:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:17:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:17:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:17:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:17:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:17:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:17:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:17:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:17:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-02 20:17:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:17:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-02 20:17:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:17:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-02 20:17:55,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:17:55,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110279197] [2022-11-02 20:17:55,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110279197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:17:55,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:17:55,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:17:55,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642289374] [2022-11-02 20:17:55,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:17:55,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:17:55,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:17:55,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:17:55,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:17:55,936 INFO L87 Difference]: Start difference. First operand 290 states and 391 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-02 20:17:57,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:17:57,136 INFO L93 Difference]: Finished difference Result 399 states and 531 transitions. [2022-11-02 20:17:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:17:57,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 105 [2022-11-02 20:17:57,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:17:57,140 INFO L225 Difference]: With dead ends: 399 [2022-11-02 20:17:57,140 INFO L226 Difference]: Without dead ends: 328 [2022-11-02 20:17:57,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:17:57,141 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 210 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:17:57,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1062 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:17:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-02 20:17:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 292. [2022-11-02 20:17:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 191 states have (on average 1.2041884816753927) internal successors, (230), 192 states have internal predecessors, (230), 78 states have call successors, (78), 21 states have call predecessors, (78), 22 states have return successors, (85), 78 states have call predecessors, (85), 77 states have call successors, (85) [2022-11-02 20:17:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 393 transitions. [2022-11-02 20:17:57,176 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 393 transitions. Word has length 105 [2022-11-02 20:17:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:17:57,176 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 393 transitions. [2022-11-02 20:17:57,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-02 20:17:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 393 transitions. [2022-11-02 20:17:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-02 20:17:57,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:17:57,178 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:17:57,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:17:57,179 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:17:57,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:17:57,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1159574532, now seen corresponding path program 1 times [2022-11-02 20:17:57,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:17:57,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710754679] [2022-11-02 20:17:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:17:57,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:17:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:03,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:18:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:03,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:18:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:03,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:18:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:03,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:18:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:03,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:18:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:03,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:18:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:03,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:18:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:03,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:18:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:03,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:18:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:04,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 20:18:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:04,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-02 20:18:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:04,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-02 20:18:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:04,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-02 20:18:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 20:18:04,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:18:04,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710754679] [2022-11-02 20:18:04,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710754679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:18:04,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:18:04,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-02 20:18:04,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639663930] [2022-11-02 20:18:04,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:18:04,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:18:04,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:18:04,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:18:04,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:18:04,295 INFO L87 Difference]: Start difference. First operand 292 states and 393 transitions. Second operand has 21 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 9 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:18:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:18:08,917 INFO L93 Difference]: Finished difference Result 537 states and 754 transitions. [2022-11-02 20:18:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:18:08,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 9 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) Word has length 107 [2022-11-02 20:18:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:18:08,921 INFO L225 Difference]: With dead ends: 537 [2022-11-02 20:18:08,922 INFO L226 Difference]: Without dead ends: 465 [2022-11-02 20:18:08,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:18:08,923 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 675 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 4031 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 4694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 4031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:18:08,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 1891 Invalid, 4694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 4031 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-02 20:18:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-02 20:18:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 346. [2022-11-02 20:18:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 229 states have (on average 1.205240174672489) internal successors, (276), 230 states have internal predecessors, (276), 90 states have call successors, (90), 24 states have call predecessors, (90), 26 states have return successors, (107), 91 states have call predecessors, (107), 89 states have call successors, (107) [2022-11-02 20:18:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 473 transitions. [2022-11-02 20:18:08,979 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 473 transitions. Word has length 107 [2022-11-02 20:18:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:18:08,979 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 473 transitions. [2022-11-02 20:18:08,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 9 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:18:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 473 transitions. [2022-11-02 20:18:08,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-02 20:18:08,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:18:08,982 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:18:08,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:18:08,982 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:18:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:18:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash -191090108, now seen corresponding path program 1 times [2022-11-02 20:18:08,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:18:08,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914993492] [2022-11-02 20:18:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:08,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:18:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:09,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:18:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:09,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:18:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:09,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:18:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:09,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:18:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:09,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:18:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:09,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:18:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:09,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:18:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:09,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:18:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:09,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:18:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:10,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:18:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:10,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-02 20:18:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:10,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-02 20:18:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:10,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-02 20:18:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:18:10,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:18:10,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914993492] [2022-11-02 20:18:10,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914993492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:18:10,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935749039] [2022-11-02 20:18:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:10,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:18:10,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:18:10,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:18:10,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:18:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:10,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 2672 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:18:10,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:18:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:18:10,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:18:10,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935749039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:18:10,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:18:10,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-11-02 20:18:10,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909697403] [2022-11-02 20:18:10,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:18:10,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:18:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:18:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:18:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:18:10,915 INFO L87 Difference]: Start difference. First operand 346 states and 473 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-02 20:18:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:18:11,198 INFO L93 Difference]: Finished difference Result 729 states and 1014 transitions. [2022-11-02 20:18:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:18:11,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 111 [2022-11-02 20:18:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:18:11,202 INFO L225 Difference]: With dead ends: 729 [2022-11-02 20:18:11,202 INFO L226 Difference]: Without dead ends: 394 [2022-11-02 20:18:11,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:18:11,205 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 40 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:18:11,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1162 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-11-02 20:18:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-02 20:18:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 361. [2022-11-02 20:18:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 244 states have (on average 1.2172131147540983) internal successors, (297), 245 states have internal predecessors, (297), 90 states have call successors, (90), 24 states have call predecessors, (90), 26 states have return successors, (107), 91 states have call predecessors, (107), 89 states have call successors, (107) [2022-11-02 20:18:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 494 transitions. [2022-11-02 20:18:11,258 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 494 transitions. Word has length 111 [2022-11-02 20:18:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:18:11,260 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 494 transitions. [2022-11-02 20:18:11,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-02 20:18:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 494 transitions. [2022-11-02 20:18:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-02 20:18:11,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:18:11,262 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:18:11,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:18:11,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:18:11,479 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:18:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:18:11,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2054489346, now seen corresponding path program 1 times [2022-11-02 20:18:11,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:18:11,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090737550] [2022-11-02 20:18:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:11,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:18:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:18:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:18:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:18:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:18:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:18:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:18:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:18:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:18:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:18:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:18:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-02 20:18:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-02 20:18:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-02 20:18:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:18:12,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:18:12,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090737550] [2022-11-02 20:18:12,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090737550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:18:12,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416371554] [2022-11-02 20:18:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:12,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:18:12,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:18:12,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:18:12,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:18:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:13,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:18:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:18:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 20:18:13,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:18:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:18:13,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416371554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:18:13,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:18:13,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 21 [2022-11-02 20:18:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953732755] [2022-11-02 20:18:13,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:18:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:18:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:18:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:18:13,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:18:13,734 INFO L87 Difference]: Start difference. First operand 361 states and 494 transitions. Second operand has 21 states, 18 states have (on average 4.777777777777778) internal successors, (86), 15 states have internal predecessors, (86), 5 states have call successors, (23), 5 states have call predecessors, (23), 7 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-02 20:18:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:18:16,015 INFO L93 Difference]: Finished difference Result 663 states and 895 transitions. [2022-11-02 20:18:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:18:16,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 4.777777777777778) internal successors, (86), 15 states have internal predecessors, (86), 5 states have call successors, (23), 5 states have call predecessors, (23), 7 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 111 [2022-11-02 20:18:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:18:16,019 INFO L225 Difference]: With dead ends: 663 [2022-11-02 20:18:16,019 INFO L226 Difference]: Without dead ends: 400 [2022-11-02 20:18:16,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:18:16,021 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 239 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:18:16,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 2416 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2644 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-02 20:18:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-02 20:18:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 370. [2022-11-02 20:18:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 251 states have (on average 1.207171314741036) internal successors, (303), 254 states have internal predecessors, (303), 90 states have call successors, (90), 24 states have call predecessors, (90), 28 states have return successors, (114), 91 states have call predecessors, (114), 89 states have call successors, (114) [2022-11-02 20:18:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 507 transitions. [2022-11-02 20:18:16,075 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 507 transitions. Word has length 111 [2022-11-02 20:18:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:18:16,075 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 507 transitions. [2022-11-02 20:18:16,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 4.777777777777778) internal successors, (86), 15 states have internal predecessors, (86), 5 states have call successors, (23), 5 states have call predecessors, (23), 7 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-02 20:18:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 507 transitions. [2022-11-02 20:18:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-02 20:18:16,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:18:16,078 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:18:16,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:18:16,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:18:16,295 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:18:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:18:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1506419318, now seen corresponding path program 1 times [2022-11-02 20:18:16,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:18:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043968226] [2022-11-02 20:18:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:16,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:18:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:18:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:18:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:18:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:18:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:18:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:18:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:18:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 20:18:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-02 20:18:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:18:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-02 20:18:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-02 20:18:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 20:18:17,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:18:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043968226] [2022-11-02 20:18:17,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043968226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:18:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592841819] [2022-11-02 20:18:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:17,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:18:17,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:18:17,334 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:18:17,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:18:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:17,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:18:17,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:18:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 20:18:18,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:18:18,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592841819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:18:18,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:18:18,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 15 [2022-11-02 20:18:18,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123425721] [2022-11-02 20:18:18,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:18:18,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:18:18,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:18:18,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:18:18,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:18:18,020 INFO L87 Difference]: Start difference. First operand 370 states and 507 transitions. Second operand has 13 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 20:18:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:18:18,425 INFO L93 Difference]: Finished difference Result 681 states and 937 transitions. [2022-11-02 20:18:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:18:18,426 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 109 [2022-11-02 20:18:18,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:18:18,429 INFO L225 Difference]: With dead ends: 681 [2022-11-02 20:18:18,429 INFO L226 Difference]: Without dead ends: 379 [2022-11-02 20:18:18,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:18:18,431 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 30 mSDsluCounter, 3379 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3697 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:18:18,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3697 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:18:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-02 20:18:18,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 375. [2022-11-02 20:18:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 255 states have (on average 1.203921568627451) internal successors, (307), 259 states have internal predecessors, (307), 90 states have call successors, (90), 24 states have call predecessors, (90), 29 states have return successors, (123), 91 states have call predecessors, (123), 89 states have call successors, (123) [2022-11-02 20:18:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 520 transitions. [2022-11-02 20:18:18,487 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 520 transitions. Word has length 109 [2022-11-02 20:18:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:18:18,487 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 520 transitions. [2022-11-02 20:18:18,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 20:18:18,488 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 520 transitions. [2022-11-02 20:18:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-02 20:18:18,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:18:18,491 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:18:18,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:18:18,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:18:18,707 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:18:18,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:18:18,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1977628791, now seen corresponding path program 1 times [2022-11-02 20:18:18,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:18:18,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441816721] [2022-11-02 20:18:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:18,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:18:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:18,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:18:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:18,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:18:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:18,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:18:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:18,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:18:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:18:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:18:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:18:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:18:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:18:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-02 20:18:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-02 20:18:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-02 20:18:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:18:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-02 20:18:19,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:18:19,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441816721] [2022-11-02 20:18:19,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441816721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:18:19,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:18:19,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:18:19,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968607855] [2022-11-02 20:18:19,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:18:19,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:18:19,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:18:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:18:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:18:19,144 INFO L87 Difference]: Start difference. First operand 375 states and 520 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-02 20:18:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:18:19,946 INFO L93 Difference]: Finished difference Result 775 states and 1074 transitions. [2022-11-02 20:18:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:18:19,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2022-11-02 20:18:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:18:19,950 INFO L225 Difference]: With dead ends: 775 [2022-11-02 20:18:19,950 INFO L226 Difference]: Without dead ends: 408 [2022-11-02 20:18:19,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:18:19,953 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 220 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:18:19,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 775 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:18:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-02 20:18:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 378. [2022-11-02 20:18:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 258 states have (on average 1.193798449612403) internal successors, (308), 262 states have internal predecessors, (308), 90 states have call successors, (90), 24 states have call predecessors, (90), 29 states have return successors, (123), 91 states have call predecessors, (123), 89 states have call successors, (123) [2022-11-02 20:18:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 521 transitions. [2022-11-02 20:18:20,013 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 521 transitions. Word has length 113 [2022-11-02 20:18:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:18:20,014 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 521 transitions. [2022-11-02 20:18:20,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-02 20:18:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 521 transitions. [2022-11-02 20:18:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-02 20:18:20,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:18:20,017 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:18:20,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:18:20,017 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:18:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:18:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1639520307, now seen corresponding path program 1 times [2022-11-02 20:18:20,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:18:20,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421472978] [2022-11-02 20:18:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:20,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:18:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:18:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:18:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:18:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:18:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:18:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:18:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:18:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:18:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:18:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-02 20:18:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-02 20:18:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-02 20:18:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:18:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-02 20:18:20,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:18:20,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421472978] [2022-11-02 20:18:20,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421472978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:18:20,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:18:20,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:18:20,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767716191] [2022-11-02 20:18:20,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:18:20,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:18:20,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:18:20,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:18:20,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:18:20,420 INFO L87 Difference]: Start difference. First operand 378 states and 521 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-02 20:18:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:18:21,182 INFO L93 Difference]: Finished difference Result 802 states and 1112 transitions. [2022-11-02 20:18:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:18:21,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2022-11-02 20:18:21,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:18:21,185 INFO L225 Difference]: With dead ends: 802 [2022-11-02 20:18:21,185 INFO L226 Difference]: Without dead ends: 435 [2022-11-02 20:18:21,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:18:21,188 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 231 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:18:21,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 788 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:18:21,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-02 20:18:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 378. [2022-11-02 20:18:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 258 states have (on average 1.182170542635659) internal successors, (305), 262 states have internal predecessors, (305), 90 states have call successors, (90), 24 states have call predecessors, (90), 29 states have return successors, (123), 91 states have call predecessors, (123), 89 states have call successors, (123) [2022-11-02 20:18:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 518 transitions. [2022-11-02 20:18:21,236 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 518 transitions. Word has length 113 [2022-11-02 20:18:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:18:21,237 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 518 transitions. [2022-11-02 20:18:21,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-02 20:18:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 518 transitions. [2022-11-02 20:18:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-02 20:18:21,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:18:21,239 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:18:21,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:18:21,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:18:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:18:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1655039025, now seen corresponding path program 1 times [2022-11-02 20:18:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:18:21,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070685544] [2022-11-02 20:18:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:21,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:18:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:23,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:18:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:23,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:18:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:23,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:18:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:23,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:18:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:24,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:18:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:24,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:18:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:24,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:18:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:24,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:18:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:24,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:18:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:24,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-02 20:18:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:24,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-02 20:18:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:24,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-02 20:18:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:24,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-02 20:18:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-02 20:18:24,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:18:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070685544] [2022-11-02 20:18:24,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070685544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:18:24,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665497726] [2022-11-02 20:18:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:18:24,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:18:24,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:18:24,480 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:18:24,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:18:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:18:25,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 2674 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-02 20:18:25,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:18:25,046 INFO L390 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 [2022-11-02 20:18:25,285 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:18:25,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2022-11-02 20:18:25,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:18:26,112 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:18:26,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 15 [2022-11-02 20:18:27,995 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_1| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_15|) 8))) (and (not (= .cse0 0)) (not (= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_15| .cse0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_1| 8)) .cse0)))) is different from true [2022-11-02 20:18:28,157 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:18:28,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-02 20:18:30,240 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_2| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_16|) 8))) (and (not (= .cse0 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_2| 8))) (not (= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_16| .cse0))))) is different from true [2022-11-02 20:18:32,311 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_17| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_3| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_17|) 8))) (and (not (= .cse0 0)) (not (= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_17| .cse0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_3| 8)) .cse0)))) is different from true [2022-11-02 20:18:34,490 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base_BEFORE_CALL_2| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base_BEFORE_CALL_2|) 8))) (and (not (= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base_BEFORE_CALL_2| .cse0)) (not (= .cse0 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_4| 8)))))) is different from true [2022-11-02 20:18:36,230 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_4| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base_BEFORE_CALL_2|) 8))) (and (not (= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base_BEFORE_CALL_2| .cse0)) (not (= .cse0 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_4| 8)))))) is different from true [2022-11-02 20:18:38,311 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_5| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_19|) 8))) (and (not (= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_19| .cse0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_5| 8)) .cse0) (not (= .cse0 0))))) is different from true [2022-11-02 20:18:40,103 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_20| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_20|) 8))) (and (not (= .cse0 0)) (not (= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_20| .cse0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_6| 8)) .cse0)))) is different from true [2022-11-02 20:18:42,004 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_21| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_21|) 8))) (and (not (= .cse0 0)) (not (= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_21| .cse0)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_7| 8)) .cse0)))) is different from true [2022-11-02 20:18:43,815 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_22| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_22|) 8))) (and (not (= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_22| .cse0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset_BEFORE_CALL_8| 8))) (not (= .cse0 0))))) is different from true [2022-11-02 20:18:43,962 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:18:43,962 INFO L390 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 46 treesize of output 18 [2022-11-02 20:18:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 45 not checked. [2022-11-02 20:18:44,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:18:44,607 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_806 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_806) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset| 8)) 0))) (forall ((v_ArrVal_806 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_806) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset| 8)) 0)))) is different from false [2022-11-02 20:18:44,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665497726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:18:44,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:18:44,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 32] total 46 [2022-11-02 20:18:44,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235691055] [2022-11-02 20:18:44,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:18:44,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:18:44,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:18:44,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:18:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1687, Unknown=10, NotChecked=910, Total=2756 [2022-11-02 20:18:44,630 INFO L87 Difference]: Start difference. First operand 378 states and 518 transitions. Second operand has 46 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 38 states have internal predecessors, (143), 17 states have call successors, (30), 17 states have call predecessors, (30), 15 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) [2022-11-02 20:21:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:16,469 INFO L93 Difference]: Finished difference Result 1116 states and 1631 transitions. [2022-11-02 20:21:16,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-02 20:21:16,470 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 38 states have internal predecessors, (143), 17 states have call successors, (30), 17 states have call predecessors, (30), 15 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) Word has length 113 [2022-11-02 20:21:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:16,480 INFO L225 Difference]: With dead ends: 1116 [2022-11-02 20:21:16,480 INFO L226 Difference]: Without dead ends: 846 [2022-11-02 20:21:16,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 173 SyntacticMatches, 20 SemanticMatches, 94 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 162.6s TimeCoverageRelationStatistics Valid=545, Invalid=6774, Unknown=31, NotChecked=1770, Total=9120 [2022-11-02 20:21:16,486 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 474 mSDsluCounter, 3733 mSDsCounter, 0 mSdLazyCounter, 6770 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 4164 SdHoareTripleChecker+Invalid, 15623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 6770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8368 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:16,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 4164 Invalid, 15623 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [485 Valid, 6770 Invalid, 0 Unknown, 8368 Unchecked, 7.0s Time] [2022-11-02 20:21:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-02 20:21:16,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 571. [2022-11-02 20:21:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 393 states have (on average 1.1653944020356235) internal successors, (458), 400 states have internal predecessors, (458), 131 states have call successors, (131), 37 states have call predecessors, (131), 46 states have return successors, (201), 133 states have call predecessors, (201), 130 states have call successors, (201) [2022-11-02 20:21:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 790 transitions. [2022-11-02 20:21:16,609 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 790 transitions. Word has length 113 [2022-11-02 20:21:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:16,609 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 790 transitions. [2022-11-02 20:21:16,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 38 states have internal predecessors, (143), 17 states have call successors, (30), 17 states have call predecessors, (30), 15 states have return successors, (26), 13 states have call predecessors, (26), 15 states have call successors, (26) [2022-11-02 20:21:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 790 transitions. [2022-11-02 20:21:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-02 20:21:16,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:16,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:16,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-02 20:21:16,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f5383a-466b-4119-8d15-cf2b9f5cb7aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:21:16,831 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:21:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash 447046383, now seen corresponding path program 1 times [2022-11-02 20:21:16,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:16,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136269828] [2022-11-02 20:21:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:16,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:21:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:21:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:21:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:21:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:21:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:21:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:21:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:21:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 20:21:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-02 20:21:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-02 20:21:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-02 20:21:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 20:21:17,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:17,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136269828] [2022-11-02 20:21:17,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136269828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:21:17,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:21:17,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:21:17,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717340009] [2022-11-02 20:21:17,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:21:17,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:21:17,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:17,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:21:17,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:21:17,917 INFO L87 Difference]: Start difference. First operand 571 states and 790 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 20:21:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:21:19,347 INFO L93 Difference]: Finished difference Result 931 states and 1283 transitions. [2022-11-02 20:21:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:21:19,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 111 [2022-11-02 20:21:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:21:19,352 INFO L225 Difference]: With dead ends: 931 [2022-11-02 20:21:19,352 INFO L226 Difference]: Without dead ends: 583 [2022-11-02 20:21:19,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:21:19,354 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 107 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:21:19,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1554 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:21:19,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-02 20:21:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 571. [2022-11-02 20:21:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 393 states have (on average 1.1653944020356235) internal successors, (458), 400 states have internal predecessors, (458), 131 states have call successors, (131), 37 states have call predecessors, (131), 46 states have return successors, (193), 133 states have call predecessors, (193), 130 states have call successors, (193) [2022-11-02 20:21:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 782 transitions. [2022-11-02 20:21:19,444 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 782 transitions. Word has length 111 [2022-11-02 20:21:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:21:19,445 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 782 transitions. [2022-11-02 20:21:19,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 20:21:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 782 transitions. [2022-11-02 20:21:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-02 20:21:19,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:21:19,449 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:21:19,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:21:19,449 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:21:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:19,450 INFO L85 PathProgramCache]: Analyzing trace with hash -520378079, now seen corresponding path program 1 times [2022-11-02 20:21:19,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:19,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963955558] [2022-11-02 20:21:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:19,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:22,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:21:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat