./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro --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 fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- 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-8393723 [2022-11-18 18:34:11,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:34:11,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:34:11,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:34:11,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:34:11,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:34:11,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:34:11,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:34:11,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:34:11,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:34:11,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:34:11,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:34:11,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:34:11,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:34:11,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:34:11,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:34:11,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:34:11,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:34:11,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:34:11,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:34:11,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:34:11,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:34:11,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:34:11,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:34:11,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:34:11,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:34:11,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:34:11,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:34:11,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:34:11,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:34:11,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:34:11,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:34:11,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:34:11,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:34:11,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:34:11,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:34:11,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:34:11,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:34:11,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:34:11,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:34:11,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:34:11,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 18:34:11,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:34:11,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:34:11,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:34:11,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:34:11,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:34:11,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:34:11,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:34:11,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:34:11,544 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:34:11,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:34:11,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:34:11,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:34:11,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:34:11,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:34:11,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:34:11,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:34:11,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:34:11,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:34:11,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:34:11,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:34:11,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:34:11,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:34:11,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:34:11,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:34:11,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:34:11,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:34:11,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:34:11,552 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:34:11,552 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:34:11,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:34:11,553 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_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2022-11-18 18:34:11,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:34:11,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:34:11,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:34:11,963 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:34:11,964 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:34:11,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-11-18 18:34:12,052 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/data/96dba2b92/d2d19bc852bf4969bec1d3ef526a4169/FLAGd398019aa [2022-11-18 18:34:13,056 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:34:13,059 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-11-18 18:34:13,113 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/data/96dba2b92/d2d19bc852bf4969bec1d3ef526a4169/FLAGd398019aa [2022-11-18 18:34:13,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/data/96dba2b92/d2d19bc852bf4969bec1d3ef526a4169 [2022-11-18 18:34:13,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:34:13,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:34:13,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:34:13,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:34:13,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:34:13,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:34:13" (1/1) ... [2022-11-18 18:34:13,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f68028d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:13, skipping insertion in model container [2022-11-18 18:34:13,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:34:13" (1/1) ... [2022-11-18 18:34:13,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:34:13,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:34:14,016 WARN L234 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_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-11-18 18:34:14,024 WARN L234 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_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-11-18 18:34:14,961 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,962 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,962 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,963 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,965 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,984 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,986 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,988 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,989 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,992 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,993 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,994 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:14,995 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,400 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 18:34:15,401 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 18:34:15,403 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 18:34:15,405 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 18:34:15,406 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 18:34:15,408 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 18:34:15,408 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 18:34:15,409 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 18:34:15,410 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 18:34:15,411 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 18:34:15,605 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 18:34:15,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:34:15,662 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:34:15,693 WARN L234 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_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-11-18 18:34:15,703 WARN L234 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_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-11-18 18:34:15,797 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,807 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,808 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,808 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,809 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,819 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,827 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,829 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,833 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,835 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,837 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,838 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,839 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 18:34:15,922 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 18:34:15,923 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 18:34:15,924 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 18:34:15,925 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 18:34:15,928 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 18:34:15,928 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 18:34:15,931 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 18:34:15,932 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 18:34:15,933 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 18:34:15,933 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 18:34:15,959 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 18:34:15,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:34:16,218 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:34:16,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16 WrapperNode [2022-11-18 18:34:16,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:34:16,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:34:16,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:34:16,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:34:16,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,398 INFO L138 Inliner]: procedures = 679, calls = 1079, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 213 [2022-11-18 18:34:16,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:34:16,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:34:16,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:34:16,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:34:16,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,488 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:34:16,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:34:16,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:34:16,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:34:16,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (1/1) ... [2022-11-18 18:34:16,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:34:16,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:16,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:34:16,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:34:16,614 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-11-18 18:34:16,614 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-11-18 18:34:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:34:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 18:34:16,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 18:34:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-18 18:34:16,617 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-18 18:34:16,618 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2022-11-18 18:34:16,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2022-11-18 18:34:16,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 18:34:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-18 18:34:16,620 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-18 18:34:16,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:34:16,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 18:34:16,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:34:16,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:34:16,622 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-18 18:34:16,622 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-18 18:34:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 18:34:16,623 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 18:34:16,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:34:16,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 18:34:16,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-18 18:34:16,624 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-18 18:34:16,625 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-18 18:34:16,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:34:17,002 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:34:17,005 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:34:17,559 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:34:17,566 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:34:17,567 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:34:17,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:34:17 BoogieIcfgContainer [2022-11-18 18:34:17,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:34:17,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:34:17,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:34:17,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:34:17,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:34:13" (1/3) ... [2022-11-18 18:34:17,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636893a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:34:17, skipping insertion in model container [2022-11-18 18:34:17,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:16" (2/3) ... [2022-11-18 18:34:17,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636893a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:34:17, skipping insertion in model container [2022-11-18 18:34:17,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:34:17" (3/3) ... [2022-11-18 18:34:17,585 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2022-11-18 18:34:17,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:34:17,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:34:17,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:34:17,706 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;@270b7e41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:34:17,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:34:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-18 18:34:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:34:17,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:17,732 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:17,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:17,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2022444143, now seen corresponding path program 1 times [2022-11-18 18:34:17,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:17,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196002514] [2022-11-18 18:34:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:17,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 18:34:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 18:34:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:34:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:34:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 18:34:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-18 18:34:18,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:18,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196002514] [2022-11-18 18:34:18,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196002514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:18,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:18,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:34:18,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114881479] [2022-11-18 18:34:18,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:18,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:34:18,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:34:18,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:18,934 INFO L87 Difference]: Start difference. First operand has 114 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-18 18:34:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:19,523 INFO L93 Difference]: Finished difference Result 225 states and 346 transitions. [2022-11-18 18:34:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:34:19,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-18 18:34:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:19,536 INFO L225 Difference]: With dead ends: 225 [2022-11-18 18:34:19,537 INFO L226 Difference]: Without dead ends: 107 [2022-11-18 18:34:19,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:19,546 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 51 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:19,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 120 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:34:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-18 18:34:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-18 18:34:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.265625) internal successors, (81), 68 states have internal predecessors, (81), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-18 18:34:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2022-11-18 18:34:19,607 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 101 [2022-11-18 18:34:19,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:19,608 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2022-11-18 18:34:19,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-18 18:34:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2022-11-18 18:34:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:34:19,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:19,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:19,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:34:19,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:19,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:19,615 INFO L85 PathProgramCache]: Analyzing trace with hash 661877963, now seen corresponding path program 1 times [2022-11-18 18:34:19,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:19,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090080192] [2022-11-18 18:34:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:19,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 18:34:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 18:34:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:34:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:34:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 18:34:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-18 18:34:20,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:20,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090080192] [2022-11-18 18:34:20,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090080192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:20,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110518656] [2022-11-18 18:34:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:20,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:20,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:20,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:20,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:34:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:34:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-18 18:34:21,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:21,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110518656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:21,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:21,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-18 18:34:21,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747640485] [2022-11-18 18:34:21,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:21,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:34:21,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:34:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:34:21,486 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-18 18:34:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:21,541 INFO L93 Difference]: Finished difference Result 207 states and 299 transitions. [2022-11-18 18:34:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:34:21,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-18 18:34:21,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:21,545 INFO L225 Difference]: With dead ends: 207 [2022-11-18 18:34:21,545 INFO L226 Difference]: Without dead ends: 119 [2022-11-18 18:34:21,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:34:21,549 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 21 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:21,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 431 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:34:21,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-18 18:34:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-11-18 18:34:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 70 states have internal predecessors, (83), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-18 18:34:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 149 transitions. [2022-11-18 18:34:21,569 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 149 transitions. Word has length 101 [2022-11-18 18:34:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:21,571 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 149 transitions. [2022-11-18 18:34:21,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-18 18:34:21,572 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 149 transitions. [2022-11-18 18:34:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:34:21,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:21,574 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:21,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:21,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:21,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1370013829, now seen corresponding path program 1 times [2022-11-18 18:34:21,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:21,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151415202] [2022-11-18 18:34:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:21,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 18:34:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 18:34:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:34:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:34:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 18:34:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 18:34:22,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:22,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151415202] [2022-11-18 18:34:22,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151415202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:22,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863968292] [2022-11-18 18:34:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:22,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:22,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:22,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:22,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:34:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:23,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:34:23,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 18:34:23,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:23,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863968292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:23,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:23,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-18 18:34:23,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284235149] [2022-11-18 18:34:23,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:23,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:34:23,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:23,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:34:23,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:34:23,301 INFO L87 Difference]: Start difference. First operand 109 states and 149 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-18 18:34:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:23,367 INFO L93 Difference]: Finished difference Result 207 states and 297 transitions. [2022-11-18 18:34:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:34:23,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-18 18:34:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:23,370 INFO L225 Difference]: With dead ends: 207 [2022-11-18 18:34:23,370 INFO L226 Difference]: Without dead ends: 117 [2022-11-18 18:34:23,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:34:23,373 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 12 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:23,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 428 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:34:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-18 18:34:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2022-11-18 18:34:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 68 states have (on average 1.25) internal successors, (85), 72 states have internal predecessors, (85), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-18 18:34:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2022-11-18 18:34:23,395 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 101 [2022-11-18 18:34:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:23,396 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2022-11-18 18:34:23,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-18 18:34:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2022-11-18 18:34:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:34:23,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:23,406 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:23,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:23,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash 38908607, now seen corresponding path program 1 times [2022-11-18 18:34:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:23,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820021896] [2022-11-18 18:34:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 18:34:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 18:34:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:34:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:34:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 18:34:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 18:34:24,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:24,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820021896] [2022-11-18 18:34:24,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820021896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:24,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803157792] [2022-11-18 18:34:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:24,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:24,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:24,325 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:24,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:34:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:24,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:34:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 18:34:24,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:24,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803157792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:24,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:24,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-18 18:34:24,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256985385] [2022-11-18 18:34:24,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:34:24,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:34:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:34:24,981 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-18 18:34:25,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:25,024 INFO L93 Difference]: Finished difference Result 207 states and 295 transitions. [2022-11-18 18:34:25,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:34:25,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2022-11-18 18:34:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:25,026 INFO L225 Difference]: With dead ends: 207 [2022-11-18 18:34:25,027 INFO L226 Difference]: Without dead ends: 115 [2022-11-18 18:34:25,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:34:25,029 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 3 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:25,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 427 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:34:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-18 18:34:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-11-18 18:34:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-18 18:34:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 154 transitions. [2022-11-18 18:34:25,042 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 154 transitions. Word has length 101 [2022-11-18 18:34:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:25,043 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 154 transitions. [2022-11-18 18:34:25,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-18 18:34:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 154 transitions. [2022-11-18 18:34:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:34:25,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:25,045 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:25,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:25,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:25,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1759122567, now seen corresponding path program 1 times [2022-11-18 18:34:25,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:25,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231130935] [2022-11-18 18:34:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:25,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 18:34:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 18:34:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:34:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:34:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 18:34:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 18:34:25,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:25,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231130935] [2022-11-18 18:34:25,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231130935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:25,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451972237] [2022-11-18 18:34:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:25,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:25,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:25,902 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:25,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:34:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:26,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:34:26,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-18 18:34:26,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:26,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451972237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:26,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:26,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-18 18:34:26,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840568851] [2022-11-18 18:34:26,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:26,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:34:26,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:26,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:34:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:34:26,752 INFO L87 Difference]: Start difference. First operand 114 states and 154 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-18 18:34:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:27,130 INFO L93 Difference]: Finished difference Result 216 states and 298 transitions. [2022-11-18 18:34:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:34:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 101 [2022-11-18 18:34:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:27,134 INFO L225 Difference]: With dead ends: 216 [2022-11-18 18:34:27,134 INFO L226 Difference]: Without dead ends: 121 [2022-11-18 18:34:27,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:34:27,136 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 177 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:27,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 396 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:34:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-18 18:34:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-18 18:34:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 82 states have internal predecessors, (94), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (36), 32 states have call predecessors, (36), 32 states have call successors, (36) [2022-11-18 18:34:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 164 transitions. [2022-11-18 18:34:27,154 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 164 transitions. Word has length 101 [2022-11-18 18:34:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:27,154 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 164 transitions. [2022-11-18 18:34:27,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-18 18:34:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 164 transitions. [2022-11-18 18:34:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:34:27,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:27,156 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:27,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:27,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:27,365 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:27,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:27,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1159297143, now seen corresponding path program 1 times [2022-11-18 18:34:27,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:27,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065770732] [2022-11-18 18:34:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:27,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:27,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:27,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:27,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:27,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:27,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:27,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:27,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:27,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 18:34:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:27,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 18:34:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:28,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:34:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:28,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:34:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:28,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:28,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 18:34:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 18:34:28,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:28,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065770732] [2022-11-18 18:34:28,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065770732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:28,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330856974] [2022-11-18 18:34:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:28,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:28,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:28,084 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:28,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:34:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:28,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:34:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-18 18:34:29,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:29,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330856974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:29,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:29,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-18 18:34:29,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448253960] [2022-11-18 18:34:29,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:29,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:34:29,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:29,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:34:29,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:34:29,027 INFO L87 Difference]: Start difference. First operand 121 states and 164 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-18 18:34:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:29,381 INFO L93 Difference]: Finished difference Result 220 states and 299 transitions. [2022-11-18 18:34:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:34:29,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 101 [2022-11-18 18:34:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:29,384 INFO L225 Difference]: With dead ends: 220 [2022-11-18 18:34:29,384 INFO L226 Difference]: Without dead ends: 121 [2022-11-18 18:34:29,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:34:29,386 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 176 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:29,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 397 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:34:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-18 18:34:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-18 18:34:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 82 states have internal predecessors, (94), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-11-18 18:34:29,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 161 transitions. [2022-11-18 18:34:29,404 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 161 transitions. Word has length 101 [2022-11-18 18:34:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:29,405 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 161 transitions. [2022-11-18 18:34:29,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-18 18:34:29,405 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 161 transitions. [2022-11-18 18:34:29,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 18:34:29,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:29,407 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:29,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:29,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:29,617 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:29,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:29,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1251856495, now seen corresponding path program 1 times [2022-11-18 18:34:29,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:29,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571168773] [2022-11-18 18:34:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:29,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 18:34:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 18:34:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:34:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:34:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 18:34:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 18:34:30,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:30,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571168773] [2022-11-18 18:34:30,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571168773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:30,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432196967] [2022-11-18 18:34:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:30,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:30,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:30,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:30,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:34:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:31,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 18:34:31,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 18:34:31,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:31,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432196967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:31,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:31,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 12 [2022-11-18 18:34:31,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368355111] [2022-11-18 18:34:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:31,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:34:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:31,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:34:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:34:31,489 INFO L87 Difference]: Start difference. First operand 121 states and 161 transitions. Second operand has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-18 18:34:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:32,147 INFO L93 Difference]: Finished difference Result 225 states and 307 transitions. [2022-11-18 18:34:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:34:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 101 [2022-11-18 18:34:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:32,150 INFO L225 Difference]: With dead ends: 225 [2022-11-18 18:34:32,150 INFO L226 Difference]: Without dead ends: 123 [2022-11-18 18:34:32,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:34:32,152 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 158 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:32,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 607 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:34:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-18 18:34:32,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-18 18:34:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 84 states have internal predecessors, (95), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (39), 32 states have call predecessors, (39), 32 states have call successors, (39) [2022-11-18 18:34:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 168 transitions. [2022-11-18 18:34:32,173 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 168 transitions. Word has length 101 [2022-11-18 18:34:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:32,173 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 168 transitions. [2022-11-18 18:34:32,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.142857142857143) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-18 18:34:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 168 transitions. [2022-11-18 18:34:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-18 18:34:32,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:32,176 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:32,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:32,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 18:34:32,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:32,387 INFO L85 PathProgramCache]: Analyzing trace with hash -657271923, now seen corresponding path program 1 times [2022-11-18 18:34:32,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:32,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551761900] [2022-11-18 18:34:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:32,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 18:34:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 18:34:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 18:34:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:32,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 18:34:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:33,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:33,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 18:34:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 18:34:33,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:33,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551761900] [2022-11-18 18:34:33,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551761900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:33,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555734083] [2022-11-18 18:34:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:33,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:33,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:33,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:34:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:33,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:34:33,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-18 18:34:34,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:34,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555734083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:34,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:34,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-18 18:34:34,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986970388] [2022-11-18 18:34:34,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:34,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:34:34,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:34:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:34:34,022 INFO L87 Difference]: Start difference. First operand 123 states and 168 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-18 18:34:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:34,634 INFO L93 Difference]: Finished difference Result 230 states and 322 transitions. [2022-11-18 18:34:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:34:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2022-11-18 18:34:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:34,637 INFO L225 Difference]: With dead ends: 230 [2022-11-18 18:34:34,637 INFO L226 Difference]: Without dead ends: 126 [2022-11-18 18:34:34,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:34:34,638 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 184 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:34,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 536 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:34:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-18 18:34:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-18 18:34:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.2125) internal successors, (97), 87 states have internal predecessors, (97), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2022-11-18 18:34:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 174 transitions. [2022-11-18 18:34:34,677 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 174 transitions. Word has length 103 [2022-11-18 18:34:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:34,680 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 174 transitions. [2022-11-18 18:34:34,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-18 18:34:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 174 transitions. [2022-11-18 18:34:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-18 18:34:34,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:34,683 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:34,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:34,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 18:34:34,893 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash 76379770, now seen corresponding path program 1 times [2022-11-18 18:34:34,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:34,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758187730] [2022-11-18 18:34:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-18 18:34:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-18 18:34:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:34:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-18 18:34:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 18:34:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 18:34:35,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:35,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758187730] [2022-11-18 18:34:35,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758187730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:35,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964629773] [2022-11-18 18:34:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:35,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:35,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:35,542 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:35,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:34:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:34:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-18 18:34:36,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:36,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964629773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:36,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:36,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-11-18 18:34:36,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267504088] [2022-11-18 18:34:36,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:36,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:34:36,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:36,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:34:36,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:34:36,615 INFO L87 Difference]: Start difference. First operand 126 states and 174 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 9 states have internal predecessors, (51), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-18 18:34:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:37,368 INFO L93 Difference]: Finished difference Result 245 states and 353 transitions. [2022-11-18 18:34:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:34:37,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 9 states have internal predecessors, (51), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 105 [2022-11-18 18:34:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:37,375 INFO L225 Difference]: With dead ends: 245 [2022-11-18 18:34:37,376 INFO L226 Difference]: Without dead ends: 138 [2022-11-18 18:34:37,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:34:37,384 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 224 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:37,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 616 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 18:34:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-18 18:34:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2022-11-18 18:34:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 89 states have internal predecessors, (100), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2022-11-18 18:34:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2022-11-18 18:34:37,416 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 105 [2022-11-18 18:34:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:37,416 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2022-11-18 18:34:37,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 9 states have internal predecessors, (51), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-18 18:34:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2022-11-18 18:34:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-18 18:34:37,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:37,420 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:37,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:37,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:37,630 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1876687072, now seen corresponding path program 1 times [2022-11-18 18:34:37,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:37,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799437887] [2022-11-18 18:34:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:37,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-18 18:34:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-18 18:34:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 18:34:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 18:34:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-18 18:34:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 18:34:38,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:38,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799437887] [2022-11-18 18:34:38,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799437887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:38,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61824812] [2022-11-18 18:34:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:38,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:38,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:38,409 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:38,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:34:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 18:34:39,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-18 18:34:39,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:39,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61824812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:39,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:39,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-18 18:34:39,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136275416] [2022-11-18 18:34:39,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:39,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:34:39,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:39,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:34:39,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:34:39,431 INFO L87 Difference]: Start difference. First operand 128 states and 177 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-18 18:34:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:39,469 INFO L93 Difference]: Finished difference Result 246 states and 361 transitions. [2022-11-18 18:34:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:34:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2022-11-18 18:34:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:39,473 INFO L225 Difference]: With dead ends: 246 [2022-11-18 18:34:39,473 INFO L226 Difference]: Without dead ends: 137 [2022-11-18 18:34:39,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:34:39,475 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 6 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:39,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 296 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:34:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-18 18:34:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 129. [2022-11-18 18:34:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.216867469879518) internal successors, (101), 90 states have internal predecessors, (101), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2022-11-18 18:34:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2022-11-18 18:34:39,509 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 106 [2022-11-18 18:34:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:39,509 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2022-11-18 18:34:39,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-18 18:34:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2022-11-18 18:34:39,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-18 18:34:39,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:39,512 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:39,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:39,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:34:39,722 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:39,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:39,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1115937726, now seen corresponding path program 1 times [2022-11-18 18:34:39,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:39,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780431378] [2022-11-18 18:34:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:39,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:34:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-18 18:34:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 18:34:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-18 18:34:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-18 18:34:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 18:34:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 18:34:40,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:40,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780431378] [2022-11-18 18:34:40,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780431378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:40,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283814691] [2022-11-18 18:34:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:40,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:40,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:40,561 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:40,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:34:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:41,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 18:34:41,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 18:34:41,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:41,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283814691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:41,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:41,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 13 [2022-11-18 18:34:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487087934] [2022-11-18 18:34:41,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:41,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:34:41,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:34:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:34:41,754 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand has 10 states, 8 states have (on average 7.625) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-18 18:34:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:42,558 INFO L93 Difference]: Finished difference Result 245 states and 348 transitions. [2022-11-18 18:34:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:34:42,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 7.625) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 114 [2022-11-18 18:34:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:42,560 INFO L225 Difference]: With dead ends: 245 [2022-11-18 18:34:42,560 INFO L226 Difference]: Without dead ends: 135 [2022-11-18 18:34:42,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:34:42,563 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 161 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:42,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 713 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 18:34:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-18 18:34:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-11-18 18:34:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 91 states have internal predecessors, (102), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2022-11-18 18:34:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2022-11-18 18:34:42,613 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 114 [2022-11-18 18:34:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:42,614 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2022-11-18 18:34:42,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 7.625) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-18 18:34:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2022-11-18 18:34:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-18 18:34:42,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:42,616 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:42,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:42,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:42,826 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:42,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:42,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1680174575, now seen corresponding path program 1 times [2022-11-18 18:34:42,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:42,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854420919] [2022-11-18 18:34:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:42,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:43,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:43,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:43,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:43,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:43,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:43,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:43,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:34:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-18 18:34:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-18 18:34:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-18 18:34:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-18 18:34:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 18:34:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-18 18:34:44,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:44,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854420919] [2022-11-18 18:34:44,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854420919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:44,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059291771] [2022-11-18 18:34:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:44,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:44,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:44,158 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:44,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:34:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:45,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:34:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 18:34:45,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:45,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059291771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:45,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:45,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 18 [2022-11-18 18:34:45,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557396137] [2022-11-18 18:34:45,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:45,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:34:45,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:45,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:34:45,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:34:45,472 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand has 11 states, 9 states have (on average 7.0) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-18 18:34:46,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:46,358 INFO L93 Difference]: Finished difference Result 250 states and 358 transitions. [2022-11-18 18:34:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:34:46,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 7.0) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 116 [2022-11-18 18:34:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:46,361 INFO L225 Difference]: With dead ends: 250 [2022-11-18 18:34:46,361 INFO L226 Difference]: Without dead ends: 139 [2022-11-18 18:34:46,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-11-18 18:34:46,363 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 165 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:46,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 899 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 18:34:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-18 18:34:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2022-11-18 18:34:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 92 states have internal predecessors, (103), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2022-11-18 18:34:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 180 transitions. [2022-11-18 18:34:46,379 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 180 transitions. Word has length 116 [2022-11-18 18:34:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:46,380 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 180 transitions. [2022-11-18 18:34:46,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 7.0) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-18 18:34:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 180 transitions. [2022-11-18 18:34:46,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-18 18:34:46,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:46,382 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:46,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:46,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:46,592 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:46,592 INFO L85 PathProgramCache]: Analyzing trace with hash 54718475, now seen corresponding path program 1 times [2022-11-18 18:34:46,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:46,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983638403] [2022-11-18 18:34:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:46,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:34:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:34:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:34:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:34:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-18 18:34:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 18:34:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-18 18:34:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-18 18:34:47,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:47,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983638403] [2022-11-18 18:34:47,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983638403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:47,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577457063] [2022-11-18 18:34:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:47,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:47,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:47,382 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:47,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:34:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:48,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-18 18:34:48,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:48,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:34:48,509 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 17 [2022-11-18 18:34:48,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-18 18:34:48,745 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_9651 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_9651) |c_#memory_$Pointer$.offset|)) (exists ((v_ArrVal_9649 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_9649) |c_#memory_$Pointer$.base|))) is different from true [2022-11-18 18:34:48,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:34:48,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 18:34:49,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:34:49,952 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 10 [2022-11-18 18:34:49,958 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 18:34:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 2 not checked. [2022-11-18 18:34:50,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:50,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577457063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:50,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:34:50,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19] total 24 [2022-11-18 18:34:50,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100268358] [2022-11-18 18:34:50,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:50,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:34:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:34:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=584, Unknown=2, NotChecked=48, Total=702 [2022-11-18 18:34:50,318 INFO L87 Difference]: Start difference. First operand 131 states and 180 transitions. Second operand has 24 states, 21 states have (on average 5.619047619047619) internal successors, (118), 19 states have internal predecessors, (118), 10 states have call successors, (26), 5 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2022-11-18 18:34:52,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:52,948 INFO L93 Difference]: Finished difference Result 345 states and 490 transitions. [2022-11-18 18:34:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 18:34:52,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 5.619047619047619) internal successors, (118), 19 states have internal predecessors, (118), 10 states have call successors, (26), 5 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) Word has length 117 [2022-11-18 18:34:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:52,952 INFO L225 Difference]: With dead ends: 345 [2022-11-18 18:34:52,952 INFO L226 Difference]: Without dead ends: 219 [2022-11-18 18:34:52,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 171 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=173, Invalid=1550, Unknown=3, NotChecked=80, Total=1806 [2022-11-18 18:34:52,956 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 89 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1255 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:52,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1740 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1538 Invalid, 0 Unknown, 1255 Unchecked, 1.9s Time] [2022-11-18 18:34:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-18 18:34:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 184. [2022-11-18 18:34:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 124 states have (on average 1.217741935483871) internal successors, (151), 134 states have internal predecessors, (151), 42 states have call successors, (42), 11 states have call predecessors, (42), 17 states have return successors, (61), 41 states have call predecessors, (61), 40 states have call successors, (61) [2022-11-18 18:34:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 254 transitions. [2022-11-18 18:34:52,996 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 254 transitions. Word has length 117 [2022-11-18 18:34:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:52,998 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 254 transitions. [2022-11-18 18:34:52,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 5.619047619047619) internal successors, (118), 19 states have internal predecessors, (118), 10 states have call successors, (26), 5 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2022-11-18 18:34:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 254 transitions. [2022-11-18 18:34:53,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-18 18:34:53,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:53,000 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:53,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:53,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:53,212 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:53,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1467799429, now seen corresponding path program 1 times [2022-11-18 18:34:53,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:53,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208762491] [2022-11-18 18:34:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:53,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:34:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:34:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:34:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:34:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 18:34:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 18:34:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:34:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 18:34:53,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:53,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208762491] [2022-11-18 18:34:53,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208762491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:53,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665841782] [2022-11-18 18:34:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:53,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:53,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:53,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:53,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:34:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:54,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:34:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 18:34:55,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:55,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665841782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:55,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:55,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-18 18:34:55,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385628483] [2022-11-18 18:34:55,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:55,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:34:55,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:55,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:34:55,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:34:55,088 INFO L87 Difference]: Start difference. First operand 184 states and 254 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 18:34:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:55,684 INFO L93 Difference]: Finished difference Result 308 states and 429 transitions. [2022-11-18 18:34:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:34:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 121 [2022-11-18 18:34:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:55,686 INFO L225 Difference]: With dead ends: 308 [2022-11-18 18:34:55,687 INFO L226 Difference]: Without dead ends: 187 [2022-11-18 18:34:55,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:34:55,688 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 183 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:55,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 539 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:34:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-18 18:34:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2022-11-18 18:34:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 125 states have (on average 1.216) internal successors, (152), 135 states have internal predecessors, (152), 42 states have call successors, (42), 11 states have call predecessors, (42), 17 states have return successors, (60), 41 states have call predecessors, (60), 40 states have call successors, (60) [2022-11-18 18:34:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 254 transitions. [2022-11-18 18:34:55,726 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 254 transitions. Word has length 121 [2022-11-18 18:34:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:55,727 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 254 transitions. [2022-11-18 18:34:55,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 18:34:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 254 transitions. [2022-11-18 18:34:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 18:34:55,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:55,731 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:34:55,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:55,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:34:55,943 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash 932900338, now seen corresponding path program 1 times [2022-11-18 18:34:55,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:55,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322758873] [2022-11-18 18:34:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:34:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:34:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:34:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:34:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 18:34:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-18 18:34:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 18:34:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-18 18:34:56,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322758873] [2022-11-18 18:34:56,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322758873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967998712] [2022-11-18 18:34:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:56,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:56,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:56,604 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:56,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:34:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:57,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:34:57,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 18:34:57,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:57,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967998712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:57,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:34:57,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2022-11-18 18:34:57,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934568211] [2022-11-18 18:34:57,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:57,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:34:57,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:34:57,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:34:57,960 INFO L87 Difference]: Start difference. First operand 185 states and 254 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 18:34:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:58,605 INFO L93 Difference]: Finished difference Result 323 states and 449 transitions. [2022-11-18 18:34:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:34:58,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 123 [2022-11-18 18:34:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:58,608 INFO L225 Difference]: With dead ends: 323 [2022-11-18 18:34:58,608 INFO L226 Difference]: Without dead ends: 197 [2022-11-18 18:34:58,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:34:58,610 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 216 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:58,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 621 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:34:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-18 18:34:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2022-11-18 18:34:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 132 states have internal predecessors, (149), 42 states have call successors, (42), 11 states have call predecessors, (42), 16 states have return successors, (56), 41 states have call predecessors, (56), 40 states have call successors, (56) [2022-11-18 18:34:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 247 transitions. [2022-11-18 18:34:58,634 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 247 transitions. Word has length 123 [2022-11-18 18:34:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:58,634 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 247 transitions. [2022-11-18 18:34:58,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-18 18:34:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 247 transitions. [2022-11-18 18:34:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-18 18:34:58,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:58,637 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-11-18 18:34:58,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:58,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:34:58,849 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:58,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:58,849 INFO L85 PathProgramCache]: Analyzing trace with hash -653048500, now seen corresponding path program 1 times [2022-11-18 18:34:58,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:58,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599094578] [2022-11-18 18:34:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:58,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:34:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:34:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:34:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:34:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:34:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:34:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:34:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:34:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 18:34:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-18 18:34:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:34:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-18 18:34:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-18 18:34:59,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:59,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599094578] [2022-11-18 18:34:59,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599094578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:59,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175391685] [2022-11-18 18:34:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:59,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:59,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:59,579 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:59,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:35:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:00,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 18:35:00,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 18:35:00,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-18 18:35:01,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175391685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:01,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:01,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 18 [2022-11-18 18:35:01,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169011212] [2022-11-18 18:35:01,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:01,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:35:01,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:01,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:35:01,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:35:01,311 INFO L87 Difference]: Start difference. First operand 182 states and 247 transitions. Second operand has 18 states, 15 states have (on average 5.666666666666667) internal successors, (85), 13 states have internal predecessors, (85), 5 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-18 18:35:02,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:02,798 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2022-11-18 18:35:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:35:02,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 5.666666666666667) internal successors, (85), 13 states have internal predecessors, (85), 5 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) Word has length 132 [2022-11-18 18:35:02,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:02,801 INFO L225 Difference]: With dead ends: 312 [2022-11-18 18:35:02,801 INFO L226 Difference]: Without dead ends: 194 [2022-11-18 18:35:02,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:35:02,804 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 68 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:02,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 820 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 18:35:02,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-18 18:35:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 183. [2022-11-18 18:35:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 133 states have internal predecessors, (149), 42 states have call successors, (42), 11 states have call predecessors, (42), 16 states have return successors, (56), 41 states have call predecessors, (56), 40 states have call successors, (56) [2022-11-18 18:35:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2022-11-18 18:35:02,829 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 132 [2022-11-18 18:35:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:02,830 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2022-11-18 18:35:02,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 5.666666666666667) internal successors, (85), 13 states have internal predecessors, (85), 5 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-18 18:35:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2022-11-18 18:35:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-18 18:35:02,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:02,834 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-11-18 18:35:02,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:03,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:35:03,046 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:35:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1387461127, now seen corresponding path program 2 times [2022-11-18 18:35:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:03,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885339998] [2022-11-18 18:35:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:35:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:03,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:03,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:35:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:03,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:35:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:35:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:35:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:35:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:35:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:35:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:35:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 18:35:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-18 18:35:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:35:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 18:35:04,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:04,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885339998] [2022-11-18 18:35:04,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885339998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:04,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063975208] [2022-11-18 18:35:04,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:35:04,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:04,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:04,356 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:04,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:35:06,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:35:06,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:35:06,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 18:35:06,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 18:35:07,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:35:07,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063975208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:35:07,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:35:07,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-11-18 18:35:07,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020431516] [2022-11-18 18:35:07,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:35:07,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:35:07,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:07,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:35:07,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:35:07,070 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 18:35:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:07,262 INFO L93 Difference]: Finished difference Result 306 states and 421 transitions. [2022-11-18 18:35:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:35:07,264 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 134 [2022-11-18 18:35:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:07,266 INFO L225 Difference]: With dead ends: 306 [2022-11-18 18:35:07,266 INFO L226 Difference]: Without dead ends: 186 [2022-11-18 18:35:07,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:35:07,268 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 8 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:07,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 979 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:35:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-18 18:35:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 176. [2022-11-18 18:35:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 126 states have internal predecessors, (143), 42 states have call successors, (42), 11 states have call predecessors, (42), 14 states have return successors, (49), 41 states have call predecessors, (49), 40 states have call successors, (49) [2022-11-18 18:35:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 234 transitions. [2022-11-18 18:35:07,293 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 234 transitions. Word has length 134 [2022-11-18 18:35:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:07,294 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 234 transitions. [2022-11-18 18:35:07,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 18:35:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 234 transitions. [2022-11-18 18:35:07,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-18 18:35:07,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:07,296 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2022-11-18 18:35:07,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-18 18:35:07,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 18:35:07,511 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:35:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:07,511 INFO L85 PathProgramCache]: Analyzing trace with hash -365275325, now seen corresponding path program 1 times [2022-11-18 18:35:07,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:07,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648364169] [2022-11-18 18:35:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:07,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:08,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:35:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:08,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:08,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:35:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:08,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:35:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:08,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:08,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:35:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:08,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:35:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:09,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:35:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:09,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:35:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:09,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:35:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:09,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:35:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:09,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-18 18:35:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:09,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 18:35:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:09,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:09,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-18 18:35:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 18:35:09,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:09,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648364169] [2022-11-18 18:35:09,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648364169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:09,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877470264] [2022-11-18 18:35:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:09,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:09,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:09,426 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:09,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:35:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-18 18:35:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:10,859 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:35:10,860 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:35:11,036 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-18 18:35:11,052 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:35:11,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 18:35:11,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-18 18:35:11,164 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-18 18:35:11,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 87 [2022-11-18 18:35:11,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 24 [2022-11-18 18:35:11,186 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2022-11-18 18:35:11,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 46 treesize of output 19 [2022-11-18 18:35:11,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-11-18 18:35:11,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-11-18 18:35:11,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 18:35:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 82 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 18:35:12,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:13,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:35:13,062 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-18 18:35:13,067 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 29 [2022-11-18 18:35:13,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 22 [2022-11-18 18:35:13,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877470264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:13,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:35:13,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-18 18:35:13,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199393684] [2022-11-18 18:35:13,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:13,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:35:13,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:13,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:35:13,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:35:13,157 INFO L87 Difference]: Start difference. First operand 176 states and 234 transitions. Second operand has 26 states, 24 states have (on average 6.166666666666667) internal successors, (148), 24 states have internal predecessors, (148), 13 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2022-11-18 18:35:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:20,675 INFO L93 Difference]: Finished difference Result 659 states and 1109 transitions. [2022-11-18 18:35:20,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-18 18:35:20,676 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 6.166666666666667) internal successors, (148), 24 states have internal predecessors, (148), 13 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) Word has length 135 [2022-11-18 18:35:20,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:20,682 INFO L225 Difference]: With dead ends: 659 [2022-11-18 18:35:20,682 INFO L226 Difference]: Without dead ends: 531 [2022-11-18 18:35:20,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 247 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=425, Invalid=3735, Unknown=0, NotChecked=0, Total=4160 [2022-11-18 18:35:20,687 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 366 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 4608 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1957 SdHoareTripleChecker+Invalid, 7857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 4608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2725 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:20,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1957 Invalid, 7857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 4608 Invalid, 0 Unknown, 2725 Unchecked, 5.9s Time] [2022-11-18 18:35:20,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-18 18:35:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 262. [2022-11-18 18:35:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 184 states have (on average 1.233695652173913) internal successors, (227), 195 states have internal predecessors, (227), 54 states have call successors, (54), 15 states have call predecessors, (54), 23 states have return successors, (78), 54 states have call predecessors, (78), 52 states have call successors, (78) [2022-11-18 18:35:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 359 transitions. [2022-11-18 18:35:20,751 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 359 transitions. Word has length 135 [2022-11-18 18:35:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:20,751 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 359 transitions. [2022-11-18 18:35:20,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 6.166666666666667) internal successors, (148), 24 states have internal predecessors, (148), 13 states have call successors, (29), 5 states have call predecessors, (29), 7 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2022-11-18 18:35:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 359 transitions. [2022-11-18 18:35:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-18 18:35:20,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:20,755 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:35:20,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:20,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:35:20,967 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:35:20,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -666038594, now seen corresponding path program 1 times [2022-11-18 18:35:20,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:20,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484816873] [2022-11-18 18:35:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:20,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:21,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:35:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:21,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:21,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:35:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:21,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:35:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:21,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:35:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:21,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:35:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:21,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:35:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:35:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:21,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 18:35:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:22,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 18:35:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:22,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:35:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:22,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 18:35:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:22,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:35:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:22,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:22,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 18:35:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:22,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 18:35:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-18 18:35:22,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:22,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484816873] [2022-11-18 18:35:22,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484816873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906395239] [2022-11-18 18:35:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:22,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:22,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:22,069 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:22,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:35:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:23,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:35:23,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-18 18:35:23,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:35:23,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906395239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:35:23,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:35:23,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-11-18 18:35:23,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393770352] [2022-11-18 18:35:23,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:35:23,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:35:23,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:23,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:35:23,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:35:23,447 INFO L87 Difference]: Start difference. First operand 262 states and 359 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 18:35:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:24,018 INFO L93 Difference]: Finished difference Result 386 states and 536 transitions. [2022-11-18 18:35:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:35:24,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 153 [2022-11-18 18:35:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:24,023 INFO L225 Difference]: With dead ends: 386 [2022-11-18 18:35:24,023 INFO L226 Difference]: Without dead ends: 275 [2022-11-18 18:35:24,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:35:24,025 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 188 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:24,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 714 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:35:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-18 18:35:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-11-18 18:35:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 190 states have (on average 1.2263157894736842) internal successors, (233), 202 states have internal predecessors, (233), 59 states have call successors, (59), 16 states have call predecessors, (59), 25 states have return successors, (87), 59 states have call predecessors, (87), 57 states have call successors, (87) [2022-11-18 18:35:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 379 transitions. [2022-11-18 18:35:24,068 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 379 transitions. Word has length 153 [2022-11-18 18:35:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:24,069 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 379 transitions. [2022-11-18 18:35:24,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 18:35:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 379 transitions. [2022-11-18 18:35:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-18 18:35:24,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:24,073 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2022-11-18 18:35:24,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:24,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:24,279 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:35:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:24,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1616340379, now seen corresponding path program 1 times [2022-11-18 18:35:24,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:24,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388858824] [2022-11-18 18:35:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:24,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:35:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:35:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:35:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:35:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:35:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:35:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:35:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:35:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:35:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:35:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:35:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:35:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 18:35:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 18:35:25,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:25,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388858824] [2022-11-18 18:35:25,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388858824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:35:25,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:35:25,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:35:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659806328] [2022-11-18 18:35:25,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:35:25,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:35:25,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:25,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:35:25,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:35:25,779 INFO L87 Difference]: Start difference. First operand 275 states and 379 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-18 18:35:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:26,618 INFO L93 Difference]: Finished difference Result 397 states and 554 transitions. [2022-11-18 18:35:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:35:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (15), 3 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 140 [2022-11-18 18:35:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:26,621 INFO L225 Difference]: With dead ends: 397 [2022-11-18 18:35:26,621 INFO L226 Difference]: Without dead ends: 277 [2022-11-18 18:35:26,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:35:26,623 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 72 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:26,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 277 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 18:35:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-18 18:35:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-11-18 18:35:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 191 states have (on average 1.225130890052356) internal successors, (234), 204 states have internal predecessors, (234), 59 states have call successors, (59), 16 states have call predecessors, (59), 26 states have return successors, (91), 59 states have call predecessors, (91), 57 states have call successors, (91) [2022-11-18 18:35:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 384 transitions. [2022-11-18 18:35:26,666 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 384 transitions. Word has length 140 [2022-11-18 18:35:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:26,666 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 384 transitions. [2022-11-18 18:35:26,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-18 18:35:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 384 transitions. [2022-11-18 18:35:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-18 18:35:26,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:26,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:35:26,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 18:35:26,670 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:35:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 479940228, now seen corresponding path program 1 times [2022-11-18 18:35:26,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:26,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365591531] [2022-11-18 18:35:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:26,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:35:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:35:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:35:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:35:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:35:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:35:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:35:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 18:35:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 18:35:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:35:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 18:35:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:35:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:35:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 18:35:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 18:35:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-18 18:35:27,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:27,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365591531] [2022-11-18 18:35:27,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365591531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:27,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67026795] [2022-11-18 18:35:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:27,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:27,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:27,588 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:27,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 18:35:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-18 18:35:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:29,016 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:35:29,016 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:35:29,181 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-18 18:35:29,201 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:35:29,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 18:35:29,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-18 18:35:29,319 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-18 18:35:29,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 87 [2022-11-18 18:35:29,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 24 [2022-11-18 18:35:29,341 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2022-11-18 18:35:29,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-11-18 18:35:29,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:35:29,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 70 treesize of output 23 [2022-11-18 18:35:29,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-11-18 18:35:29,470 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-18 18:35:29,471 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 18:35:31,535 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_22| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_22|) 0) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_22|))) is different from true [2022-11-18 18:35:33,692 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_23| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_23|) 0) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_23|))) is different from true [2022-11-18 18:35:35,763 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_24| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_24| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_24|) 0)))) is different from true [2022-11-18 18:35:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 71 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 44 not checked. [2022-11-18 18:35:50,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:53,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:35:53,056 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-11-18 18:35:53,059 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 17 [2022-11-18 18:35:53,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-11-18 18:35:53,170 WARN L837 $PredicateComparison]: unable to prove that (or (= (select |c_old(#valid)| |c_ensure_linked_list_is_allocated_#in~list.base|) 0) (forall ((v_ArrVal_14711 Int) (v_ArrVal_14708 (Array Int Int)) (v_ArrVal_14709 (Array Int Int))) (not (= |c_ensure_linked_list_is_allocated_#in~list.base| (select (select (store (store |c_#memory_$Pointer$.base| c_ensure_linked_list_is_allocated_~curr~0.base v_ArrVal_14708) c_ensure_linked_list_is_allocated_~list.base (store (select (store |c_#memory_$Pointer$.base| c_ensure_linked_list_is_allocated_~curr~0.base v_ArrVal_14709) c_ensure_linked_list_is_allocated_~list.base) (+ c_ensure_linked_list_is_allocated_~list.offset 24) v_ArrVal_14711)) |c_ensure_linked_list_is_allocated_#in~list.base|) |c_ensure_linked_list_is_allocated_#in~list.offset|))))) is different from false [2022-11-18 18:35:53,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:35:53,208 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2022-11-18 18:35:53,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:35:53,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 151 [2022-11-18 18:35:53,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 144 treesize of output 140 [2022-11-18 18:35:53,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 140 treesize of output 138 [2022-11-18 18:35:53,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-11-18 18:35:53,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 22 [2022-11-18 18:35:53,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:35:53,460 INFO L350 Elim1Store]: Elim1 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 108 treesize of output 102 [2022-11-18 18:35:53,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67026795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:53,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:35:53,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19] total 26 [2022-11-18 18:35:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91376266] [2022-11-18 18:35:53,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:35:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:35:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1030, Unknown=6, NotChecked=268, Total=1406 [2022-11-18 18:35:53,921 INFO L87 Difference]: Start difference. First operand 277 states and 384 transitions. Second operand has 26 states, 25 states have (on average 6.0) internal successors, (150), 23 states have internal predecessors, (150), 8 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) [2022-11-18 18:37:26,404 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_22| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_22|) 0) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_22|))) (exists ((|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_24| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_24| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_24|) 0))))) is different from true [2022-11-18 18:38:06,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:06,206 INFO L93 Difference]: Finished difference Result 694 states and 1053 transitions. [2022-11-18 18:38:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 18:38:06,212 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 6.0) internal successors, (150), 23 states have internal predecessors, (150), 8 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) Word has length 153 [2022-11-18 18:38:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:06,218 INFO L225 Difference]: With dead ends: 694 [2022-11-18 18:38:06,218 INFO L226 Difference]: Without dead ends: 421 [2022-11-18 18:38:06,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 286 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 153.3s TimeCoverageRelationStatistics Valid=235, Invalid=2514, Unknown=27, NotChecked=530, Total=3306 [2022-11-18 18:38:06,223 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 162 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 4234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2207 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:06,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1058 Invalid, 4234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1925 Invalid, 0 Unknown, 2207 Unchecked, 2.2s Time] [2022-11-18 18:38:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-18 18:38:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 333. [2022-11-18 18:38:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 236 states have (on average 1.228813559322034) internal successors, (290), 250 states have internal predecessors, (290), 65 states have call successors, (65), 20 states have call predecessors, (65), 31 states have return successors, (105), 65 states have call predecessors, (105), 63 states have call successors, (105) [2022-11-18 18:38:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 460 transitions. [2022-11-18 18:38:06,281 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 460 transitions. Word has length 153 [2022-11-18 18:38:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:06,281 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 460 transitions. [2022-11-18 18:38:06,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 6.0) internal successors, (150), 23 states have internal predecessors, (150), 8 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) [2022-11-18 18:38:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 460 transitions. [2022-11-18 18:38:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-18 18:38:06,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:06,285 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:38:06,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:06,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:06,496 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash 806993753, now seen corresponding path program 1 times [2022-11-18 18:38:06,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:06,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569413931] [2022-11-18 18:38:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:06,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:38:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:38:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:38:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:38:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:38:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:38:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 18:38:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 18:38:07,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:07,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569413931] [2022-11-18 18:38:07,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569413931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:07,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:38:07,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:38:07,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828533397] [2022-11-18 18:38:07,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:07,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:38:07,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:38:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:38:07,833 INFO L87 Difference]: Start difference. First operand 333 states and 460 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-18 18:38:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:09,268 INFO L93 Difference]: Finished difference Result 465 states and 650 transitions. [2022-11-18 18:38:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:38:09,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 140 [2022-11-18 18:38:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:09,277 INFO L225 Difference]: With dead ends: 465 [2022-11-18 18:38:09,277 INFO L226 Difference]: Without dead ends: 336 [2022-11-18 18:38:09,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:38:09,280 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 127 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:09,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 467 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 18:38:09,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-18 18:38:09,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-11-18 18:38:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 238 states have (on average 1.226890756302521) internal successors, (292), 253 states have internal predecessors, (292), 65 states have call successors, (65), 20 states have call predecessors, (65), 32 states have return successors, (110), 65 states have call predecessors, (110), 63 states have call successors, (110) [2022-11-18 18:38:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 467 transitions. [2022-11-18 18:38:09,351 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 467 transitions. Word has length 140 [2022-11-18 18:38:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:09,351 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 467 transitions. [2022-11-18 18:38:09,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-18 18:38:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 467 transitions. [2022-11-18 18:38:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-18 18:38:09,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:09,355 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:38:09,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 18:38:09,355 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:09,356 INFO L85 PathProgramCache]: Analyzing trace with hash 392902016, now seen corresponding path program 1 times [2022-11-18 18:38:09,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:09,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861127243] [2022-11-18 18:38:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:09,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:38:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:38:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 18:38:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 18:38:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 18:38:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:38:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 18:38:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 18:38:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-18 18:38:09,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:09,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861127243] [2022-11-18 18:38:09,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861127243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:09,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6430965] [2022-11-18 18:38:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:09,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:09,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:09,731 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:09,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 18:38:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:10,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:38:10,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 18:38:10,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:38:10,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6430965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:10,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:38:10,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-18 18:38:10,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549018790] [2022-11-18 18:38:10,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:38:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:38:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:38:10,979 INFO L87 Difference]: Start difference. First operand 336 states and 467 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-18 18:38:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:11,049 INFO L93 Difference]: Finished difference Result 639 states and 929 transitions. [2022-11-18 18:38:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:38:11,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 153 [2022-11-18 18:38:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:11,053 INFO L225 Difference]: With dead ends: 639 [2022-11-18 18:38:11,053 INFO L226 Difference]: Without dead ends: 339 [2022-11-18 18:38:11,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:38:11,057 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 3 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:11,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 431 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:38:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-18 18:38:11,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 336. [2022-11-18 18:38:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 238 states have (on average 1.2142857142857142) internal successors, (289), 253 states have internal predecessors, (289), 65 states have call successors, (65), 20 states have call predecessors, (65), 32 states have return successors, (110), 65 states have call predecessors, (110), 63 states have call successors, (110) [2022-11-18 18:38:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 464 transitions. [2022-11-18 18:38:11,112 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 464 transitions. Word has length 153 [2022-11-18 18:38:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:11,112 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 464 transitions. [2022-11-18 18:38:11,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-18 18:38:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 464 transitions. [2022-11-18 18:38:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-18 18:38:11,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:11,116 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:38:11,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:11,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:11,327 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:11,327 INFO L85 PathProgramCache]: Analyzing trace with hash 413966743, now seen corresponding path program 1 times [2022-11-18 18:38:11,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:11,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176363135] [2022-11-18 18:38:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:11,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:38:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:38:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:38:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:38:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:38:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:38:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 18:38:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 18:38:12,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:12,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176363135] [2022-11-18 18:38:12,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176363135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:12,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:38:12,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:38:12,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425349283] [2022-11-18 18:38:12,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:12,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:38:12,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:12,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:38:12,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:38:12,750 INFO L87 Difference]: Start difference. First operand 336 states and 464 transitions. Second operand has 9 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-18 18:38:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:13,843 INFO L93 Difference]: Finished difference Result 473 states and 663 transitions. [2022-11-18 18:38:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:38:13,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 140 [2022-11-18 18:38:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:13,847 INFO L225 Difference]: With dead ends: 473 [2022-11-18 18:38:13,847 INFO L226 Difference]: Without dead ends: 341 [2022-11-18 18:38:13,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:38:13,849 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 112 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:13,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 299 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 18:38:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-18 18:38:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 339. [2022-11-18 18:38:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 241 states have (on average 1.2116182572614107) internal successors, (292), 256 states have internal predecessors, (292), 65 states have call successors, (65), 20 states have call predecessors, (65), 32 states have return successors, (110), 65 states have call predecessors, (110), 63 states have call successors, (110) [2022-11-18 18:38:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 467 transitions. [2022-11-18 18:38:13,908 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 467 transitions. Word has length 140 [2022-11-18 18:38:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:13,909 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 467 transitions. [2022-11-18 18:38:13,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.285714285714286) internal successors, (58), 8 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-18 18:38:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 467 transitions. [2022-11-18 18:38:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-18 18:38:13,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:13,912 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:38:13,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 18:38:13,913 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:13,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1376119554, now seen corresponding path program 1 times [2022-11-18 18:38:13,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:13,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134682365] [2022-11-18 18:38:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:13,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:38:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:38:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 18:38:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 18:38:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 18:38:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:38:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 18:38:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 18:38:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-18 18:38:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134682365] [2022-11-18 18:38:14,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134682365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:14,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141674098] [2022-11-18 18:38:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:14,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:14,624 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:14,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 18:38:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:15,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 18:38:15,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 11 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-18 18:38:16,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 5 proven. 51 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-18 18:38:16,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141674098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:16,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:16,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-11-18 18:38:16,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658634933] [2022-11-18 18:38:16,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:16,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 18:38:16,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:16,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 18:38:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:38:16,665 INFO L87 Difference]: Start difference. First operand 339 states and 467 transitions. Second operand has 26 states, 23 states have (on average 6.782608695652174) internal successors, (156), 25 states have internal predecessors, (156), 13 states have call successors, (34), 3 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 13 states have call successors, (32) [2022-11-18 18:38:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:18,542 INFO L93 Difference]: Finished difference Result 586 states and 848 transitions. [2022-11-18 18:38:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:38:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 6.782608695652174) internal successors, (156), 25 states have internal predecessors, (156), 13 states have call successors, (34), 3 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 13 states have call successors, (32) Word has length 153 [2022-11-18 18:38:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:18,546 INFO L225 Difference]: With dead ends: 586 [2022-11-18 18:38:18,546 INFO L226 Difference]: Without dead ends: 345 [2022-11-18 18:38:18,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 18:38:18,549 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 355 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:18,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 507 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 18:38:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-18 18:38:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 319. [2022-11-18 18:38:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 224 states have (on average 1.2008928571428572) internal successors, (269), 242 states have internal predecessors, (269), 62 states have call successors, (62), 16 states have call predecessors, (62), 32 states have return successors, (118), 63 states have call predecessors, (118), 60 states have call successors, (118) [2022-11-18 18:38:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 449 transitions. [2022-11-18 18:38:18,603 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 449 transitions. Word has length 153 [2022-11-18 18:38:18,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:18,603 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 449 transitions. [2022-11-18 18:38:18,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 6.782608695652174) internal successors, (156), 25 states have internal predecessors, (156), 13 states have call successors, (34), 3 states have call predecessors, (34), 6 states have return successors, (32), 7 states have call predecessors, (32), 13 states have call successors, (32) [2022-11-18 18:38:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 449 transitions. [2022-11-18 18:38:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-18 18:38:18,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:18,607 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:38:18,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:18,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 18:38:18,823 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:18,824 INFO L85 PathProgramCache]: Analyzing trace with hash 672132181, now seen corresponding path program 1 times [2022-11-18 18:38:18,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:18,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604797025] [2022-11-18 18:38:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:18,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:38:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:38:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:38:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:38:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:38:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:38:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 18:38:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 18:38:19,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:19,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604797025] [2022-11-18 18:38:19,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604797025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:19,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:38:19,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:38:19,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660683753] [2022-11-18 18:38:19,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:19,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:38:19,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:19,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:38:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:38:19,647 INFO L87 Difference]: Start difference. First operand 319 states and 449 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-18 18:38:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:21,170 INFO L93 Difference]: Finished difference Result 473 states and 676 transitions. [2022-11-18 18:38:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:38:21,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 140 [2022-11-18 18:38:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:21,173 INFO L225 Difference]: With dead ends: 473 [2022-11-18 18:38:21,173 INFO L226 Difference]: Without dead ends: 321 [2022-11-18 18:38:21,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:38:21,176 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 141 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:21,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 510 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 18:38:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-18 18:38:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2022-11-18 18:38:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 223 states have (on average 1.201793721973094) internal successors, (268), 241 states have internal predecessors, (268), 62 states have call successors, (62), 16 states have call predecessors, (62), 32 states have return successors, (118), 63 states have call predecessors, (118), 60 states have call successors, (118) [2022-11-18 18:38:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 448 transitions. [2022-11-18 18:38:21,230 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 448 transitions. Word has length 140 [2022-11-18 18:38:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:21,231 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 448 transitions. [2022-11-18 18:38:21,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 6 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-18 18:38:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 448 transitions. [2022-11-18 18:38:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-18 18:38:21,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:21,234 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:38:21,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-18 18:38:21,235 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:21,235 INFO L85 PathProgramCache]: Analyzing trace with hash -623237788, now seen corresponding path program 1 times [2022-11-18 18:38:21,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:21,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296575684] [2022-11-18 18:38:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:21,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:38:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:38:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:38:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:38:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:38:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-18 18:38:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 18:38:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-18 18:38:21,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296575684] [2022-11-18 18:38:21,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296575684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:21,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508632721] [2022-11-18 18:38:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:21,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:21,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:21,939 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:21,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 18:38:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:23,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 18:38:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 18:38:23,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 18:38:24,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508632721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:24,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:24,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 23 [2022-11-18 18:38:24,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635901811] [2022-11-18 18:38:24,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:24,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 18:38:24,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:24,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 18:38:24,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:38:24,095 INFO L87 Difference]: Start difference. First operand 318 states and 448 transitions. Second operand has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 22 states have internal predecessors, (129), 11 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 9 states have call predecessors, (31), 11 states have call successors, (31) [2022-11-18 18:38:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:26,184 INFO L93 Difference]: Finished difference Result 574 states and 839 transitions. [2022-11-18 18:38:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:38:26,184 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 22 states have internal predecessors, (129), 11 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 9 states have call predecessors, (31), 11 states have call successors, (31) Word has length 141 [2022-11-18 18:38:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:26,187 INFO L225 Difference]: With dead ends: 574 [2022-11-18 18:38:26,187 INFO L226 Difference]: Without dead ends: 280 [2022-11-18 18:38:26,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 18:38:26,190 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 380 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:26,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 689 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 18:38:26,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-18 18:38:26,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 271. [2022-11-18 18:38:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 186 states have (on average 1.1774193548387097) internal successors, (219), 199 states have internal predecessors, (219), 58 states have call successors, (58), 16 states have call predecessors, (58), 26 states have return successors, (92), 58 states have call predecessors, (92), 56 states have call successors, (92) [2022-11-18 18:38:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 369 transitions. [2022-11-18 18:38:26,238 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 369 transitions. Word has length 141 [2022-11-18 18:38:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:26,239 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 369 transitions. [2022-11-18 18:38:26,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 22 states have internal predecessors, (129), 11 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 9 states have call predecessors, (31), 11 states have call successors, (31) [2022-11-18 18:38:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 369 transitions. [2022-11-18 18:38:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-18 18:38:26,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:26,242 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:38:26,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:26,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 18:38:26,455 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1841043424, now seen corresponding path program 1 times [2022-11-18 18:38:26,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:26,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093827091] [2022-11-18 18:38:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:26,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:26,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:38:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:38:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:38:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:38:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:38:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-18 18:38:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 18:38:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-18 18:38:27,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:27,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093827091] [2022-11-18 18:38:27,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093827091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:27,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571706324] [2022-11-18 18:38:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:27,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:27,301 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:27,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 18:38:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:28,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:38:28,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 18:38:28,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:38:28,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571706324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:28,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:38:28,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2022-11-18 18:38:28,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031506157] [2022-11-18 18:38:28,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:28,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:38:28,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:28,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:38:28,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:38:28,935 INFO L87 Difference]: Start difference. First operand 271 states and 369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 18:38:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:29,454 INFO L93 Difference]: Finished difference Result 388 states and 528 transitions. [2022-11-18 18:38:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:38:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 141 [2022-11-18 18:38:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:29,457 INFO L225 Difference]: With dead ends: 388 [2022-11-18 18:38:29,457 INFO L226 Difference]: Without dead ends: 262 [2022-11-18 18:38:29,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-11-18 18:38:29,459 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 185 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:29,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 609 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:38:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-18 18:38:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-11-18 18:38:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 178 states have (on average 1.1741573033707866) internal successors, (209), 190 states have internal predecessors, (209), 58 states have call successors, (58), 16 states have call predecessors, (58), 25 states have return successors, (91), 58 states have call predecessors, (91), 56 states have call successors, (91) [2022-11-18 18:38:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 358 transitions. [2022-11-18 18:38:29,508 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 358 transitions. Word has length 141 [2022-11-18 18:38:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:29,509 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 358 transitions. [2022-11-18 18:38:29,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 18:38:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 358 transitions. [2022-11-18 18:38:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-18 18:38:29,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:29,512 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:38:29,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:29,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 18:38:29,725 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:29,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1307945050, now seen corresponding path program 1 times [2022-11-18 18:38:29,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:29,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116930640] [2022-11-18 18:38:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:29,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:38:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:38:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:31,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:38:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:32,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:32,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:38:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:32,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:38:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:32,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:32,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-18 18:38:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:32,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 18:38:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-18 18:38:32,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:32,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116930640] [2022-11-18 18:38:32,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116930640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:32,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835739077] [2022-11-18 18:38:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:32,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:32,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:32,354 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:32,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 18:38:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:33,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-18 18:38:33,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:33,884 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:38:33,885 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:38:33,904 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:38:33,904 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 18:38:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 91 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 18:38:35,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-18 18:38:36,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835739077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:36,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:36,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 11] total 41 [2022-11-18 18:38:36,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592328946] [2022-11-18 18:38:36,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:36,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 18:38:36,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:36,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 18:38:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 18:38:36,378 INFO L87 Difference]: Start difference. First operand 262 states and 358 transitions. Second operand has 41 states, 40 states have (on average 3.55) internal successors, (142), 35 states have internal predecessors, (142), 16 states have call successors, (38), 4 states have call predecessors, (38), 11 states have return successors, (36), 20 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-18 18:38:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:47,264 INFO L93 Difference]: Finished difference Result 596 states and 926 transitions. [2022-11-18 18:38:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 18:38:47,265 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.55) internal successors, (142), 35 states have internal predecessors, (142), 16 states have call successors, (38), 4 states have call predecessors, (38), 11 states have return successors, (36), 20 states have call predecessors, (36), 16 states have call successors, (36) Word has length 141 [2022-11-18 18:38:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:47,276 INFO L225 Difference]: With dead ends: 596 [2022-11-18 18:38:47,277 INFO L226 Difference]: Without dead ends: 481 [2022-11-18 18:38:47,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=410, Invalid=4846, Unknown=0, NotChecked=0, Total=5256 [2022-11-18 18:38:47,280 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 286 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 7937 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 8557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 7937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:47,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 2378 Invalid, 8557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 7937 Invalid, 0 Unknown, 381 Unchecked, 9.0s Time] [2022-11-18 18:38:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-18 18:38:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 296. [2022-11-18 18:38:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 200 states have (on average 1.16) internal successors, (232), 211 states have internal predecessors, (232), 65 states have call successors, (65), 20 states have call predecessors, (65), 30 states have return successors, (100), 67 states have call predecessors, (100), 63 states have call successors, (100) [2022-11-18 18:38:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 397 transitions. [2022-11-18 18:38:47,361 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 397 transitions. Word has length 141 [2022-11-18 18:38:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:47,361 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 397 transitions. [2022-11-18 18:38:47,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.55) internal successors, (142), 35 states have internal predecessors, (142), 16 states have call successors, (38), 4 states have call predecessors, (38), 11 states have return successors, (36), 20 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-18 18:38:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 397 transitions. [2022-11-18 18:38:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-18 18:38:47,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:47,365 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-11-18 18:38:47,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:47,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 18:38:47,579 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:47,579 INFO L85 PathProgramCache]: Analyzing trace with hash -47147753, now seen corresponding path program 1 times [2022-11-18 18:38:47,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:47,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288658961] [2022-11-18 18:38:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:47,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:47,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:47,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:47,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:47,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:47,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:47,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:47,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:38:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:48,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:48,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:38:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:48,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:38:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:48,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:48,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:38:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:48,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:38:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:48,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:48,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:38:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:48,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 18:38:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 18:38:48,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:48,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288658961] [2022-11-18 18:38:48,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288658961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:48,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:38:48,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:38:48,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624342139] [2022-11-18 18:38:48,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:48,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:38:48,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:48,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:38:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:38:48,177 INFO L87 Difference]: Start difference. First operand 296 states and 397 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 18:38:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:49,421 INFO L93 Difference]: Finished difference Result 418 states and 572 transitions. [2022-11-18 18:38:49,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:38:49,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 142 [2022-11-18 18:38:49,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:49,425 INFO L225 Difference]: With dead ends: 418 [2022-11-18 18:38:49,426 INFO L226 Difference]: Without dead ends: 296 [2022-11-18 18:38:49,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:38:49,430 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 124 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:49,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 409 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 18:38:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-18 18:38:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-11-18 18:38:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 200 states have (on average 1.16) internal successors, (232), 211 states have internal predecessors, (232), 65 states have call successors, (65), 20 states have call predecessors, (65), 30 states have return successors, (99), 67 states have call predecessors, (99), 63 states have call successors, (99) [2022-11-18 18:38:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 396 transitions. [2022-11-18 18:38:49,493 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 396 transitions. Word has length 142 [2022-11-18 18:38:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:49,494 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 396 transitions. [2022-11-18 18:38:49,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 18:38:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 396 transitions. [2022-11-18 18:38:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-18 18:38:49,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:49,498 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:38:49,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-18 18:38:49,498 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:49,499 INFO L85 PathProgramCache]: Analyzing trace with hash 405010793, now seen corresponding path program 2 times [2022-11-18 18:38:49,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:49,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671751398] [2022-11-18 18:38:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:49,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:51,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:51,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:51,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:51,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:51,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:38:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:51,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:51,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:38:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:51,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:38:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:52,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:52,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:38:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:52,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 18:38:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:52,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-18 18:38:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:52,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:52,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-18 18:38:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:52,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-18 18:38:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 18:38:52,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671751398] [2022-11-18 18:38:52,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671751398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109185888] [2022-11-18 18:38:52,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:38:52,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:52,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:52,200 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:52,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 18:38:53,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:38:53,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:38:53,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 18:38:53,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:53,610 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 35 [2022-11-18 18:38:53,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-18 18:38:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-18 18:38:54,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:38:54,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109185888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:54,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:38:54,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2022-11-18 18:38:54,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475209356] [2022-11-18 18:38:54,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:54,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:38:54,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:38:54,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:38:54,672 INFO L87 Difference]: Start difference. First operand 296 states and 396 transitions. Second operand has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-18 18:38:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:54,948 INFO L93 Difference]: Finished difference Result 419 states and 564 transitions. [2022-11-18 18:38:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:38:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (15), 3 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 152 [2022-11-18 18:38:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:54,952 INFO L225 Difference]: With dead ends: 419 [2022-11-18 18:38:54,952 INFO L226 Difference]: Without dead ends: 307 [2022-11-18 18:38:54,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:38:54,953 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 11 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:54,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 905 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 263 Unchecked, 0.1s Time] [2022-11-18 18:38:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-18 18:38:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 304. [2022-11-18 18:38:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 208 states have (on average 1.1586538461538463) internal successors, (241), 218 states have internal predecessors, (241), 65 states have call successors, (65), 21 states have call predecessors, (65), 30 states have return successors, (99), 67 states have call predecessors, (99), 63 states have call successors, (99) [2022-11-18 18:38:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 405 transitions. [2022-11-18 18:38:55,015 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 405 transitions. Word has length 152 [2022-11-18 18:38:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:55,015 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 405 transitions. [2022-11-18 18:38:55,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-18 18:38:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 405 transitions. [2022-11-18 18:38:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-18 18:38:55,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:55,018 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:38:55,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:55,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-18 18:38:55,227 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash 270149221, now seen corresponding path program 1 times [2022-11-18 18:38:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:55,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981586061] [2022-11-18 18:38:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:38:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:38:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:38:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:38:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:38:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:38:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:38:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:38:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 18:38:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-18 18:38:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:38:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-18 18:38:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-18 18:38:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-18 18:38:56,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:56,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981586061] [2022-11-18 18:38:56,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981586061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526295326] [2022-11-18 18:38:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:56,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:56,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:56,440 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:56,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 18:38:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-18 18:38:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:58,127 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-18 18:38:58,130 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 18:38:58,135 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-18 18:38:58,139 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 18:39:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 18:39:00,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:02,818 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_aws_linked_list_empty_~list.base_29 Int) (v_aws_linked_list_empty_~list.offset_29 Int)) (= v_aws_linked_list_empty_~list.base_29 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_empty_~list.base_29) v_aws_linked_list_empty_~list.offset_29))) (forall ((v_aws_linked_list_empty_~list.base_29 Int) (v_aws_linked_list_empty_~list.offset_29 Int)) (= (+ v_aws_linked_list_empty_~list.offset_29 16) (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_empty_~list.base_29) v_aws_linked_list_empty_~list.offset_29)))) is different from false [2022-11-18 18:39:02,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526295326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:02,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:39:02,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 37 [2022-11-18 18:39:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841310305] [2022-11-18 18:39:02,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:02,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 18:39:02,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 18:39:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1298, Unknown=1, NotChecked=72, Total=1482 [2022-11-18 18:39:02,822 INFO L87 Difference]: Start difference. First operand 304 states and 405 transitions. Second operand has 37 states, 35 states have (on average 4.514285714285714) internal successors, (158), 32 states have internal predecessors, (158), 14 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (28), 14 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-18 18:39:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:39:06,936 INFO L93 Difference]: Finished difference Result 597 states and 844 transitions. [2022-11-18 18:39:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 18:39:06,937 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 4.514285714285714) internal successors, (158), 32 states have internal predecessors, (158), 14 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (28), 14 states have call predecessors, (28), 14 states have call successors, (28) Word has length 152 [2022-11-18 18:39:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:39:06,941 INFO L225 Difference]: With dead ends: 597 [2022-11-18 18:39:06,942 INFO L226 Difference]: Without dead ends: 424 [2022-11-18 18:39:06,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=323, Invalid=4236, Unknown=1, NotChecked=132, Total=4692 [2022-11-18 18:39:06,946 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 166 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 555 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:39:06,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 1422 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1763 Invalid, 0 Unknown, 555 Unchecked, 2.4s Time] [2022-11-18 18:39:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-18 18:39:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 366. [2022-11-18 18:39:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 255 states have (on average 1.1529411764705881) internal successors, (294), 267 states have internal predecessors, (294), 74 states have call successors, (74), 25 states have call predecessors, (74), 36 states have return successors, (108), 76 states have call predecessors, (108), 72 states have call successors, (108) [2022-11-18 18:39:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 476 transitions. [2022-11-18 18:39:07,035 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 476 transitions. Word has length 152 [2022-11-18 18:39:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:39:07,035 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 476 transitions. [2022-11-18 18:39:07,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 4.514285714285714) internal successors, (158), 32 states have internal predecessors, (158), 14 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (28), 14 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-18 18:39:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 476 transitions. [2022-11-18 18:39:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-18 18:39:07,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:39:07,038 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:39:07,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:07,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:07,251 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:39:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 758815848, now seen corresponding path program 1 times [2022-11-18 18:39:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:07,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008505072] [2022-11-18 18:39:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:07,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:39:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:39:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:39:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:39:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:39:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:39:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:39:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:39:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:39:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:39:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:08,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 18:39:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:09,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-18 18:39:09,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:09,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008505072] [2022-11-18 18:39:09,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008505072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:39:09,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:39:09,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-18 18:39:09,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091964606] [2022-11-18 18:39:09,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:39:09,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:39:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:09,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:39:09,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:39:09,728 INFO L87 Difference]: Start difference. First operand 366 states and 476 transitions. Second operand has 14 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 12 states have internal predecessors, (69), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-18 18:39:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:39:11,513 INFO L93 Difference]: Finished difference Result 498 states and 670 transitions. [2022-11-18 18:39:11,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:39:11,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 12 states have internal predecessors, (69), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 153 [2022-11-18 18:39:11,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:39:11,515 INFO L225 Difference]: With dead ends: 498 [2022-11-18 18:39:11,515 INFO L226 Difference]: Without dead ends: 373 [2022-11-18 18:39:11,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:39:11,517 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 140 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:39:11,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 552 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 18:39:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-18 18:39:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 367. [2022-11-18 18:39:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 256 states have (on average 1.15234375) internal successors, (295), 268 states have internal predecessors, (295), 74 states have call successors, (74), 25 states have call predecessors, (74), 36 states have return successors, (108), 76 states have call predecessors, (108), 72 states have call successors, (108) [2022-11-18 18:39:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 477 transitions. [2022-11-18 18:39:11,596 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 477 transitions. Word has length 153 [2022-11-18 18:39:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:39:11,597 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 477 transitions. [2022-11-18 18:39:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 12 states have internal predecessors, (69), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-18 18:39:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 477 transitions. [2022-11-18 18:39:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-18 18:39:11,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:39:11,600 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:39:11,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-18 18:39:11,601 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:39:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1302887655, now seen corresponding path program 1 times [2022-11-18 18:39:11,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:11,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418805824] [2022-11-18 18:39:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:11,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:39:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:39:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-18 18:39:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:39:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:39:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:39:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 18:39:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 18:39:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 18:39:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:39:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 18:39:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 18:39:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-18 18:39:12,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:12,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418805824] [2022-11-18 18:39:12,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418805824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:39:12,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:39:12,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:39:12,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887714241] [2022-11-18 18:39:12,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:39:12,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:39:12,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:39:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:39:12,703 INFO L87 Difference]: Start difference. First operand 367 states and 477 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-18 18:39:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:39:14,341 INFO L93 Difference]: Finished difference Result 500 states and 673 transitions. [2022-11-18 18:39:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:39:14,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 166 [2022-11-18 18:39:14,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:39:14,344 INFO L225 Difference]: With dead ends: 500 [2022-11-18 18:39:14,344 INFO L226 Difference]: Without dead ends: 374 [2022-11-18 18:39:14,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:39:14,346 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 126 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:39:14,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 542 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 18:39:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-18 18:39:14,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 367. [2022-11-18 18:39:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 256 states have (on average 1.15234375) internal successors, (295), 268 states have internal predecessors, (295), 74 states have call successors, (74), 25 states have call predecessors, (74), 36 states have return successors, (107), 76 states have call predecessors, (107), 72 states have call successors, (107) [2022-11-18 18:39:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 476 transitions. [2022-11-18 18:39:14,429 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 476 transitions. Word has length 166 [2022-11-18 18:39:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:39:14,429 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 476 transitions. [2022-11-18 18:39:14,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-18 18:39:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 476 transitions. [2022-11-18 18:39:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-18 18:39:14,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:39:14,433 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:39:14,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-18 18:39:14,433 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:39:14,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:14,434 INFO L85 PathProgramCache]: Analyzing trace with hash 147770312, now seen corresponding path program 1 times [2022-11-18 18:39:14,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:14,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696757543] [2022-11-18 18:39:14,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:14,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:39:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:39:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-18 18:39:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:39:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:39:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:39:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 18:39:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 18:39:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 18:39:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:39:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 18:39:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:14,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 18:39:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:15,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-18 18:39:15,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:15,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696757543] [2022-11-18 18:39:15,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696757543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:15,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743223179] [2022-11-18 18:39:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:15,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:15,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:15,177 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:15,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 18:39:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:16,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 18:39:16,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 65 proven. 1 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-18 18:39:17,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:17,358 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 18:39:17,358 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 23 [2022-11-18 18:39:17,368 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-18 18:39:17,368 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 12 [2022-11-18 18:39:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-18 18:39:17,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743223179] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:17,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:39:17,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 11] total 20 [2022-11-18 18:39:17,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918214003] [2022-11-18 18:39:17,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:39:17,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:39:17,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:17,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:39:17,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:39:17,442 INFO L87 Difference]: Start difference. First operand 367 states and 476 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-18 18:39:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:39:17,915 INFO L93 Difference]: Finished difference Result 501 states and 679 transitions. [2022-11-18 18:39:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:39:17,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) Word has length 168 [2022-11-18 18:39:17,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:39:17,917 INFO L225 Difference]: With dead ends: 501 [2022-11-18 18:39:17,918 INFO L226 Difference]: Without dead ends: 375 [2022-11-18 18:39:17,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:39:17,919 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 27 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:39:17,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 887 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:39:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-18 18:39:18,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 367. [2022-11-18 18:39:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 256 states have (on average 1.14453125) internal successors, (293), 268 states have internal predecessors, (293), 74 states have call successors, (74), 25 states have call predecessors, (74), 36 states have return successors, (107), 76 states have call predecessors, (107), 72 states have call successors, (107) [2022-11-18 18:39:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 474 transitions. [2022-11-18 18:39:18,004 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 474 transitions. Word has length 168 [2022-11-18 18:39:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:39:18,005 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 474 transitions. [2022-11-18 18:39:18,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 7 states have internal predecessors, (61), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-18 18:39:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 474 transitions. [2022-11-18 18:39:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-18 18:39:18,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:39:18,008 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:39:18,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:18,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:18,222 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:39:18,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:18,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2039789455, now seen corresponding path program 2 times [2022-11-18 18:39:18,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:18,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478326078] [2022-11-18 18:39:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:18,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:20,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:39:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:20,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:20,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:39:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:20,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:39:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:39:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:39:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:39:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 18:39:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-18 18:39:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:39:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:39:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-18 18:39:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-18 18:39:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:39:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-18 18:39:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-18 18:39:33,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:33,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478326078] [2022-11-18 18:39:33,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478326078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:33,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015449538] [2022-11-18 18:39:33,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:39:33,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:33,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:33,835 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:33,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 18:39:37,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:39:37,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:39:37,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-18 18:39:37,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:37,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:39:37,485 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 17 [2022-11-18 18:39:37,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-18 18:39:37,662 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2022-11-18 18:39:37,668 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2022-11-18 18:39:37,994 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_21051 (Array Int Int)) (v_ArrVal_21050 (Array Int Int)) (ensure_linked_list_is_allocated_~node~0.base Int) (ensure_linked_list_is_allocated_~curr~0.base Int) (v_ArrVal_21057 (Array Int Int)) (v_ArrVal_21056 (Array Int Int)) (v_ArrVal_21053 (Array Int Int)) (v_ArrVal_21052 (Array Int Int)) (v_ArrVal_21055 (Array Int Int)) (v_ArrVal_21054 (Array Int Int))) (and (<= ensure_linked_list_is_allocated_~curr~0.base ensure_linked_list_is_allocated_~node~0.base) (= (store (store (store (store |c_old(#memory_$Pointer$.offset)| |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_21052) ensure_linked_list_is_allocated_~node~0.base v_ArrVal_21051) ensure_linked_list_is_allocated_~curr~0.base v_ArrVal_21055) |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_21057) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store (store (store (store |c_old(#memory_$Pointer$.base)| |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_21050) ensure_linked_list_is_allocated_~node~0.base v_ArrVal_21053) ensure_linked_list_is_allocated_~curr~0.base v_ArrVal_21056) |c_ensure_linked_list_is_allocated_#in~list.base| v_ArrVal_21054)) (< ensure_linked_list_is_allocated_~node~0.base |c_#StackHeapBarrier|))) is different from true [2022-11-18 18:39:38,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:39:38,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:39:38,102 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 18:39:38,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 37 [2022-11-18 18:39:38,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:39:38,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:39:38,155 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 18:39:38,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-18 18:39:39,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:39:39,413 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 10 [2022-11-18 18:39:39,418 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 18:39:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 39 proven. 16 refuted. 0 times theorem prover too weak. 117 trivial. 2 not checked. [2022-11-18 18:39:39,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:52,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015449538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:52,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:39:52,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2022-11-18 18:39:52,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159684505] [2022-11-18 18:39:52,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:52,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 18:39:52,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:52,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 18:39:52,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=750, Unknown=25, NotChecked=56, Total=930 [2022-11-18 18:39:52,520 INFO L87 Difference]: Start difference. First operand 367 states and 474 transitions. Second operand has 27 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 14 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2022-11-18 18:40:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:11,885 INFO L93 Difference]: Finished difference Result 528 states and 703 transitions. [2022-11-18 18:40:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:40:11,886 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 14 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) Word has length 157 [2022-11-18 18:40:11,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:11,889 INFO L225 Difference]: With dead ends: 528 [2022-11-18 18:40:11,889 INFO L226 Difference]: Without dead ends: 421 [2022-11-18 18:40:11,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 289 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=184, Invalid=1337, Unknown=43, NotChecked=76, Total=1640 [2022-11-18 18:40:11,891 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 159 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 851 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:11,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 962 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1541 Invalid, 0 Unknown, 851 Unchecked, 3.2s Time] [2022-11-18 18:40:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-18 18:40:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 371. [2022-11-18 18:40:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 261 states have (on average 1.1187739463601531) internal successors, (292), 273 states have internal predecessors, (292), 72 states have call successors, (72), 26 states have call predecessors, (72), 37 states have return successors, (105), 74 states have call predecessors, (105), 70 states have call successors, (105) [2022-11-18 18:40:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 469 transitions. [2022-11-18 18:40:11,988 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 469 transitions. Word has length 157 [2022-11-18 18:40:11,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:11,989 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 469 transitions. [2022-11-18 18:40:11,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 14 states have call successors, (26), 5 states have call predecessors, (26), 7 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2022-11-18 18:40:11,989 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 469 transitions. [2022-11-18 18:40:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-18 18:40:11,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:11,992 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:40:12,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:12,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 18:40:12,210 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:12,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:12,210 INFO L85 PathProgramCache]: Analyzing trace with hash -303210987, now seen corresponding path program 1 times [2022-11-18 18:40:12,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:12,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889928690] [2022-11-18 18:40:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:12,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:40:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:40:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:40:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:40:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:40:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:40:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:40:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:40:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:40:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:40:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:40:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:40:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:40:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:40:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:40:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 18:40:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:40:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-18 18:40:12,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889928690] [2022-11-18 18:40:12,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889928690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:12,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:12,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:40:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950285165] [2022-11-18 18:40:12,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:12,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:40:12,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:40:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:40:12,636 INFO L87 Difference]: Start difference. First operand 371 states and 469 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-18 18:40:13,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:13,540 INFO L93 Difference]: Finished difference Result 381 states and 480 transitions. [2022-11-18 18:40:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:40:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 156 [2022-11-18 18:40:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:13,543 INFO L225 Difference]: With dead ends: 381 [2022-11-18 18:40:13,544 INFO L226 Difference]: Without dead ends: 379 [2022-11-18 18:40:13,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:40:13,545 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 63 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:13,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 495 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 18:40:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-18 18:40:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 377. [2022-11-18 18:40:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 264 states have (on average 1.1174242424242424) internal successors, (295), 276 states have internal predecessors, (295), 74 states have call successors, (74), 27 states have call predecessors, (74), 38 states have return successors, (107), 76 states have call predecessors, (107), 72 states have call successors, (107) [2022-11-18 18:40:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 476 transitions. [2022-11-18 18:40:13,636 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 476 transitions. Word has length 156 [2022-11-18 18:40:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:13,636 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 476 transitions. [2022-11-18 18:40:13,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-18 18:40:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 476 transitions. [2022-11-18 18:40:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-18 18:40:13,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:13,639 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:40:13,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-18 18:40:13,640 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1360457641, now seen corresponding path program 1 times [2022-11-18 18:40:13,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:13,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031652386] [2022-11-18 18:40:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:13,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:40:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:40:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:40:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:40:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:40:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:40:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 18:40:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:40:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 18:40:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 18:40:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:40:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:40:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 18:40:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:40:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:40:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-18 18:40:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-11-18 18:40:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 41 proven. 12 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-18 18:40:14,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:14,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031652386] [2022-11-18 18:40:14,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031652386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:40:14,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25759439] [2022-11-18 18:40:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:14,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:14,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:14,470 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:14,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 18:40:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:16,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:40:16,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-18 18:40:16,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:40:16,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25759439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:16,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:40:16,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2022-11-18 18:40:16,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904988107] [2022-11-18 18:40:16,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:16,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:40:16,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:16,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:40:16,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-11-18 18:40:16,499 INFO L87 Difference]: Start difference. First operand 377 states and 476 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 18:40:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:17,334 INFO L93 Difference]: Finished difference Result 483 states and 621 transitions. [2022-11-18 18:40:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:40:17,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 156 [2022-11-18 18:40:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:17,337 INFO L225 Difference]: With dead ends: 483 [2022-11-18 18:40:17,337 INFO L226 Difference]: Without dead ends: 376 [2022-11-18 18:40:17,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-18 18:40:17,338 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 188 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:17,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 754 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 18:40:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-18 18:40:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 374. [2022-11-18 18:40:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 262 states have (on average 1.1106870229007633) internal successors, (291), 273 states have internal predecessors, (291), 74 states have call successors, (74), 27 states have call predecessors, (74), 37 states have return successors, (106), 76 states have call predecessors, (106), 72 states have call successors, (106) [2022-11-18 18:40:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 471 transitions. [2022-11-18 18:40:17,434 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 471 transitions. Word has length 156 [2022-11-18 18:40:17,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:17,434 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 471 transitions. [2022-11-18 18:40:17,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 18:40:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 471 transitions. [2022-11-18 18:40:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-18 18:40:17,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:17,438 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:40:17,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:17,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 18:40:17,658 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:17,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1112831881, now seen corresponding path program 2 times [2022-11-18 18:40:17,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:17,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587700324] [2022-11-18 18:40:17,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:17,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:40:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:40:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:40:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:40:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:40:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:40:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-18 18:40:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:40:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-18 18:40:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-18 18:40:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:40:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 18:40:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 18:40:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:40:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 18:40:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:18,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 18:40:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:19,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:40:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:19,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:40:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-18 18:40:19,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:19,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587700324] [2022-11-18 18:40:19,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587700324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:40:19,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419226869] [2022-11-18 18:40:19,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:40:19,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:40:19,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:40:19,231 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:40:19,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 18:40:20,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:40:20,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:40:20,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-18 18:40:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:21,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:40:21,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:40:21,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:40:21,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-18 18:40:21,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:40:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:40:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:40:21,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-18 18:40:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 84 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-18 18:40:22,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:40:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 67 proven. 3 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-18 18:40:24,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419226869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:40:24,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:40:24,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 12] total 37 [2022-11-18 18:40:24,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929292735] [2022-11-18 18:40:24,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:40:24,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 18:40:24,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:24,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 18:40:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 18:40:24,065 INFO L87 Difference]: Start difference. First operand 374 states and 471 transitions. Second operand has 37 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 35 states have internal predecessors, (132), 14 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-11-18 18:40:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:40:28,228 INFO L93 Difference]: Finished difference Result 595 states and 774 transitions. [2022-11-18 18:40:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 18:40:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 35 states have internal predecessors, (132), 14 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 164 [2022-11-18 18:40:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:40:28,231 INFO L225 Difference]: With dead ends: 595 [2022-11-18 18:40:28,231 INFO L226 Difference]: Without dead ends: 446 [2022-11-18 18:40:28,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=361, Invalid=3421, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 18:40:28,235 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 259 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 591 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:40:28,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 949 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1811 Invalid, 0 Unknown, 591 Unchecked, 2.5s Time] [2022-11-18 18:40:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-18 18:40:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 423. [2022-11-18 18:40:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 303 states have (on average 1.1221122112211221) internal successors, (340), 315 states have internal predecessors, (340), 78 states have call successors, (78), 30 states have call predecessors, (78), 41 states have return successors, (110), 80 states have call predecessors, (110), 76 states have call successors, (110) [2022-11-18 18:40:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 528 transitions. [2022-11-18 18:40:28,344 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 528 transitions. Word has length 164 [2022-11-18 18:40:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:40:28,345 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 528 transitions. [2022-11-18 18:40:28,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 35 states have internal predecessors, (132), 14 states have call successors, (34), 5 states have call predecessors, (34), 7 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-11-18 18:40:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 528 transitions. [2022-11-18 18:40:28,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-18 18:40:28,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:40:28,348 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 18:40:28,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 18:40:28,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-18 18:40:28,563 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:40:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:40:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1733917871, now seen corresponding path program 3 times [2022-11-18 18:40:28,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:40:28,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596543449] [2022-11-18 18:40:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:40:28,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:40:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:31,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 18:40:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:31,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:40:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:31,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:40:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:31,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 18:40:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:33,947 WARN L233 SmtUtils]: Spent 24.30s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:41:54,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:41:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 18:41:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 18:41:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:41:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:41:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-18 18:41:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-18 18:41:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 18:41:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 18:41:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 18:41:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 18:41:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 18:41:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-18 18:41:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-18 18:41:54,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596543449] [2022-11-18 18:41:54,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596543449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:41:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966727560] [2022-11-18 18:41:54,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:41:54,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:41:54,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:41:54,218 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:41:54,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1072f966-4268-4e5f-b1ff-d77bc85d5fb7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 18:42:16,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 18:42:16,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:42:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1332 conjuncts, 472 conjunts are in the unsatisfiable core [2022-11-18 18:42:16,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:16,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 18:42:16,969 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-18 18:42:16,987 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:42:16,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 18:42:16,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-18 18:42:17,007 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 18:42:17,015 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-18 18:42:17,035 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 18:42:17,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 18:42:17,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-18 18:42:17,337 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 18:42:17,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 36 [2022-11-18 18:42:17,371 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 18:42:17,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 36 [2022-11-18 18:42:17,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:42:17,400 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 18:42:17,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 38 [2022-11-18 18:42:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:42:17,446 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 18:42:17,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 38 [2022-11-18 18:42:17,467 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 18:42:17,467 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 11 [2022-11-18 18:42:17,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-18 18:42:17,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 22 [2022-11-18 18:42:17,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 22 [2022-11-18 18:42:18,730 INFO L321 Elim1Store]: treesize reduction 164, result has 27.1 percent of original size [2022-11-18 18:42:18,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 118 treesize of output 176 [2022-11-18 18:42:19,258 INFO L321 Elim1Store]: treesize reduction 173, result has 51.4 percent of original size [2022-11-18 18:42:19,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 111 treesize of output 251 [2022-11-18 18:42:19,498 INFO L321 Elim1Store]: treesize reduction 86, result has 46.6 percent of original size [2022-11-18 18:42:19,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 114 [2022-11-18 18:43:17,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 89 [2022-11-18 18:43:17,324 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-18 18:43:17,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 28 treesize of output 35 [2022-11-18 18:43:17,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 49 [2022-11-18 18:43:17,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2022-11-18 18:43:17,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-18 18:43:18,269 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-18 18:43:18,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2022-11-18 18:43:18,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2022-11-18 18:43:18,951 INFO L321 Elim1Store]: treesize reduction 66, result has 49.2 percent of original size [2022-11-18 18:43:18,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 139 treesize of output 182 [2022-11-18 18:43:25,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-18 18:43:25,838 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-18 18:43:25,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 59 treesize of output 60 [2022-11-18 18:43:28,386 INFO L321 Elim1Store]: treesize reduction 198, result has 67.2 percent of original size [2022-11-18 18:43:28,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 324 treesize of output 689