./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa --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 ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:30:14,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:30:14,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:30:14,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:30:14,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:30:14,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:30:14,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:30:14,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:30:14,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:30:14,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:30:14,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:30:14,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:30:14,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:30:14,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:30:14,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:30:14,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:30:14,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:30:14,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:30:14,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:30:14,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:30:14,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:30:14,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:30:14,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:30:14,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:30:14,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:30:14,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:30:14,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:30:14,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:30:14,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:30:14,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:30:14,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:30:14,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:30:14,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:30:14,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:30:14,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:30:14,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:30:14,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:30:14,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:30:14,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:30:14,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:30:14,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:30:14,498 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 19:30:14,514 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:30:14,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:30:14,515 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:30:14,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:30:14,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:30:14,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:30:14,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:30:14,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:30:14,516 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:30:14,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:30:14,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:30:14,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:30:14,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:30:14,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:30:14,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:30:14,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:30:14,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:30:14,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:30:14,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:30:14,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:30:14,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:30:14,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:30:14,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:30:14,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:30:14,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:30:14,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:30:14,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:30:14,519 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:30:14,519 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:30:14,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:30:14,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:30:14,519 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_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 [2021-12-06 19:30:14,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:30:14,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:30:14,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:30:14,704 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:30:14,704 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:30:14,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-12-06 19:30:14,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/data/da5eb2259/ba5f828cd5f24db6989cb98ce86efec7/FLAG6e4d31636 [2021-12-06 19:30:15,393 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:30:15,394 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-12-06 19:30:15,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/data/da5eb2259/ba5f828cd5f24db6989cb98ce86efec7/FLAG6e4d31636 [2021-12-06 19:30:15,751 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/data/da5eb2259/ba5f828cd5f24db6989cb98ce86efec7 [2021-12-06 19:30:15,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:30:15,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:30:15,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:30:15,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:30:15,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:30:15,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:30:15" (1/1) ... [2021-12-06 19:30:15,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54fe95c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:15, skipping insertion in model container [2021-12-06 19:30:15,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:30:15" (1/1) ... [2021-12-06 19:30:15,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:30:15,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:30:16,098 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-06 19:30:16,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-06 19:30:16,921 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:16,922 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:16,923 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:16,924 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:16,925 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:16,935 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:16,936 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:16,937 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:16,938 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,378 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:30:17,379 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:30:17,379 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:30:17,380 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:30:17,381 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:30:17,382 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:30:17,382 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:30:17,383 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:30:17,383 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:30:17,383 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:30:17,574 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:30:17,647 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,647 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,938 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,938 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,955 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,955 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,960 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,960 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,970 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,971 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,971 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,971 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,972 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,972 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,972 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:17,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:30:18,026 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:30:18,035 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-06 19:30:18,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-06 19:30:18,067 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,068 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,068 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,068 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,069 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,073 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,073 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,096 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:30:18,097 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:30:18,097 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:30:18,098 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:30:18,098 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:30:18,099 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:30:18,099 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:30:18,099 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:30:18,100 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:30:18,100 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:30:18,114 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:30:18,149 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,149 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,212 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,213 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,217 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,218 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,219 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,220 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,225 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,226 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,226 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,226 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:30:18,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:30:18,435 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:30:18,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18 WrapperNode [2021-12-06 19:30:18,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:30:18,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:30:18,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:30:18,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:30:18,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (1/1) ... [2021-12-06 19:30:18,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (1/1) ... [2021-12-06 19:30:18,586 INFO L137 Inliner]: procedures = 776, calls = 3576, calls flagged for inlining = 77, calls inlined = 6, statements flattened = 787 [2021-12-06 19:30:18,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:30:18,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:30:18,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:30:18,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:30:18,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (1/1) ... [2021-12-06 19:30:18,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (1/1) ... [2021-12-06 19:30:18,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (1/1) ... [2021-12-06 19:30:18,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (1/1) ... [2021-12-06 19:30:18,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (1/1) ... [2021-12-06 19:30:18,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (1/1) ... [2021-12-06 19:30:18,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (1/1) ... [2021-12-06 19:30:18,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:30:18,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:30:18,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:30:18,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:30:18,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (1/1) ... [2021-12-06 19:30:18,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:30:18,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:30:18,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:30:18,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:30:18,739 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-06 19:30:18,739 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-06 19:30:18,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:30:18,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:30:18,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:30:18,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:30:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:30:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:30:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:30:18,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:30:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-06 19:30:18,740 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-06 19:30:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:30:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:30:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure hashlittle2 [2021-12-06 19:30:18,741 INFO L138 BoogieDeclarations]: Found implementation of procedure hashlittle2 [2021-12-06 19:30:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:30:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-06 19:30:18,741 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-06 19:30:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:30:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 19:30:18,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 19:30:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 19:30:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:30:18,950 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:30:18,952 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:30:19,895 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2021-12-06 19:30:19,902 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:30:19,910 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:30:19,910 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-06 19:30:19,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:30:19 BoogieIcfgContainer [2021-12-06 19:30:19,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:30:19,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:30:19,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:30:19,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:30:19,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:30:15" (1/3) ... [2021-12-06 19:30:19,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edcfdd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:30:19, skipping insertion in model container [2021-12-06 19:30:19,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:30:18" (2/3) ... [2021-12-06 19:30:19,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edcfdd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:30:19, skipping insertion in model container [2021-12-06 19:30:19,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:30:19" (3/3) ... [2021-12-06 19:30:19,921 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_byte_cursor_ptr_harness.i [2021-12-06 19:30:19,926 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:30:19,926 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:30:19,975 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:30:19,982 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:30:19,982 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:30:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-06 19:30:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 19:30:20,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:20,011 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:20,012 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:30:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1196197405, now seen corresponding path program 1 times [2021-12-06 19:30:20,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:30:20,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816835370] [2021-12-06 19:30:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:20,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:30:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:20,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:30:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:20,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:30:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:20,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:30:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:20,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 19:30:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:20,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:30:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:20,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:30:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:20,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 19:30:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:20,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 19:30:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 19:30:20,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:30:20,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816835370] [2021-12-06 19:30:20,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816835370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:20,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:30:20,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:30:20,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172441199] [2021-12-06 19:30:20,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:20,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:30:20,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:30:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:30:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:30:20,594 INFO L87 Difference]: Start difference. First operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:30:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:20,792 INFO L93 Difference]: Finished difference Result 263 states and 398 transitions. [2021-12-06 19:30:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:30:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-06 19:30:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:20,803 INFO L225 Difference]: With dead ends: 263 [2021-12-06 19:30:20,803 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 19:30:20,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:30:20,811 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 28 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:20,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 273 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:30:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 19:30:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-06 19:30:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 109 states have internal predecessors, (161), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 19:30:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2021-12-06 19:30:20,851 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 62 [2021-12-06 19:30:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:20,852 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2021-12-06 19:30:20,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:30:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2021-12-06 19:30:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 19:30:20,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:20,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:20,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:30:20,857 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:30:20,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash -902599839, now seen corresponding path program 1 times [2021-12-06 19:30:20,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:30:20,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749808006] [2021-12-06 19:30:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:20,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:30:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:21,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:30:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:21,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:30:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:21,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:30:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:21,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 19:30:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:21,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:30:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:21,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:30:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:21,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 19:30:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:21,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 19:30:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 19:30:21,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:30:21,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749808006] [2021-12-06 19:30:21,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749808006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:30:21,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538376877] [2021-12-06 19:30:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:21,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:21,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:30:21,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:30:21,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:30:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:21,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 2556 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 19:30:21,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:30:21,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:30:21,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538376877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:21,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:30:21,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-06 19:30:21,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088097683] [2021-12-06 19:30:21,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:21,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:30:21,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:30:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:30:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:30:21,703 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:30:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:21,790 INFO L93 Difference]: Finished difference Result 239 states and 354 transitions. [2021-12-06 19:30:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:30:21,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-06 19:30:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:21,793 INFO L225 Difference]: With dead ends: 239 [2021-12-06 19:30:21,793 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 19:30:21,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:30:21,795 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 197 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:21,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 636 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:30:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 19:30:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-06 19:30:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-12-06 19:30:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2021-12-06 19:30:21,808 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 62 [2021-12-06 19:30:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:21,808 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2021-12-06 19:30:21,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:30:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2021-12-06 19:30:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:30:21,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:21,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:21,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:30:22,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:22,012 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:30:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:22,013 INFO L85 PathProgramCache]: Analyzing trace with hash 90546502, now seen corresponding path program 1 times [2021-12-06 19:30:22,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:30:22,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579709140] [2021-12-06 19:30:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:22,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:30:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:22,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:30:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:22,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:30:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:22,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:30:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:22,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:30:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:22,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:30:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:22,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 19:30:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:22,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 19:30:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:22,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 19:30:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:30:22,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:30:22,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579709140] [2021-12-06 19:30:22,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579709140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:30:22,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542276583] [2021-12-06 19:30:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:22,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:22,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:30:22,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:30:22,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:30:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:22,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:30:22,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:30:22,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:30:22,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542276583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:30:22,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:30:22,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-12-06 19:30:22,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262549578] [2021-12-06 19:30:22,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:30:22,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:30:22,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:30:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:30:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:30:22,961 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 19:30:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:30:23,055 INFO L93 Difference]: Finished difference Result 239 states and 350 transitions. [2021-12-06 19:30:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:30:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2021-12-06 19:30:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:30:23,057 INFO L225 Difference]: With dead ends: 239 [2021-12-06 19:30:23,058 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 19:30:23,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:30:23,060 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 201 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:30:23,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 800 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:30:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 19:30:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-06 19:30:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-06 19:30:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 189 transitions. [2021-12-06 19:30:23,074 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 189 transitions. Word has length 64 [2021-12-06 19:30:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:30:23,075 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 189 transitions. [2021-12-06 19:30:23,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 19:30:23,075 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 189 transitions. [2021-12-06 19:30:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 19:30:23,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:30:23,077 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:30:23,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:30:23,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:23,279 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:30:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:30:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash -249804501, now seen corresponding path program 2 times [2021-12-06 19:30:23,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:30:23,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145055651] [2021-12-06 19:30:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:30:23,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:30:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:23,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:30:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:23,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:30:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:30:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:23,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:30:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:23,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:30:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:23,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:30:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:23,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:30:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:23,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 19:30:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:30:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:30:23,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:30:23,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145055651] [2021-12-06 19:30:23,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145055651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:30:23,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133159837] [2021-12-06 19:30:23,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:30:23,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:30:23,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:30:23,647 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:30:23,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:30:27,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:30:27,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:30:27,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 403 conjunts are in the unsatisfiable core [2021-12-06 19:30:27,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:30:30,876 INFO L244 Elim1Store]: Index analysis took 165 ms [2021-12-06 19:30:41,874 WARN L227 SmtUtils]: Spent 10.95s on a formula simplification. DAG size of input: 1179 DAG size of output: 590 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 19:30:41,876 INFO L354 Elim1Store]: treesize reduction 784, result has 50.0 percent of original size [2021-12-06 19:30:41,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 197 select indices, 197 select index equivalence classes, 19110 disjoint index pairs (out of 19306 index pairs), introduced 197 new quantified variables, introduced 196 case distinctions, treesize of input 986 treesize of output 1376 [2021-12-06 19:31:09,949 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Requested array size exceeds VM limit [2021-12-06 19:31:09,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:31:09,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-06 19:31:09,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575478245] [2021-12-06 19:31:09,950 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:09,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:31:09,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:09,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:31:09,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:31:09,951 INFO L87 Difference]: Start difference. First operand 131 states and 189 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 19:31:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:10,252 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2021-12-06 19:31:10,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:31:10,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2021-12-06 19:31:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:10,254 INFO L225 Difference]: With dead ends: 158 [2021-12-06 19:31:10,254 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 19:31:10,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:31:10,255 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 99 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:10,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1233 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:31:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 19:31:10,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-06 19:31:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 109 states have internal predecessors, (160), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 19:31:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2021-12-06 19:31:10,263 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 66 [2021-12-06 19:31:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:10,263 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2021-12-06 19:31:10,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 19:31:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2021-12-06 19:31:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 19:31:10,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:10,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:10,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:31:10,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:10,466 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:10,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:10,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1967970000, now seen corresponding path program 1 times [2021-12-06 19:31:10,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:10,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385723369] [2021-12-06 19:31:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:10,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:10,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:10,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:10,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:10,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:10,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:10,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:10,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:10,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 19:31:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:10,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:10,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385723369] [2021-12-06 19:31:10,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385723369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:10,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304634836] [2021-12-06 19:31:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:10,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:10,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:10,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:10,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:31:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 19:31:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 19:31:11,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 19:31:11,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304634836] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:11,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:11,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 25 [2021-12-06 19:31:11,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168405073] [2021-12-06 19:31:11,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:31:11,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:31:11,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:31:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-12-06 19:31:11,489 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-06 19:31:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:11,539 INFO L93 Difference]: Finished difference Result 140 states and 200 transitions. [2021-12-06 19:31:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:31:11,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 68 [2021-12-06 19:31:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:11,541 INFO L225 Difference]: With dead ends: 140 [2021-12-06 19:31:11,541 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 19:31:11,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-12-06 19:31:11,542 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 17 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:11,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1245 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:31:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 19:31:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-06 19:31:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 114 states have (on average 1.456140350877193) internal successors, (166), 116 states have internal predecessors, (166), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2021-12-06 19:31:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 197 transitions. [2021-12-06 19:31:11,551 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 197 transitions. Word has length 68 [2021-12-06 19:31:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:11,551 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 197 transitions. [2021-12-06 19:31:11,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-06 19:31:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 197 transitions. [2021-12-06 19:31:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 19:31:11,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:11,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:11,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 19:31:11,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:11,754 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:11,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash -278658024, now seen corresponding path program 1 times [2021-12-06 19:31:11,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:11,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835512054] [2021-12-06 19:31:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:11,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:11,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:11,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-06 19:31:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:12,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:12,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835512054] [2021-12-06 19:31:12,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835512054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:12,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62588866] [2021-12-06 19:31:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:12,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:12,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:12,109 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:12,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:31:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 19:31:12,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:12,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:13,157 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-06 19:31:13,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-06 19:31:13,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:13,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:13,517 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-12-06 19:31:13,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 70 [2021-12-06 19:31:13,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 19:31:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:13,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:13,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62588866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:13,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:13,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-06 19:31:13,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247661023] [2021-12-06 19:31:13,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:13,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:31:13,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:13,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:31:13,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-06 19:31:13,818 INFO L87 Difference]: Start difference. First operand 137 states and 197 transitions. Second operand has 26 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 22 states have internal predecessors, (91), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:14,601 INFO L93 Difference]: Finished difference Result 232 states and 324 transitions. [2021-12-06 19:31:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:31:14,602 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 22 states have internal predecessors, (91), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 72 [2021-12-06 19:31:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:14,604 INFO L225 Difference]: With dead ends: 232 [2021-12-06 19:31:14,604 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 19:31:14,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=206, Invalid=1773, Unknown=1, NotChecked=0, Total=1980 [2021-12-06 19:31:14,605 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 60 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:14,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1582 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 701 Invalid, 0 Unknown, 239 Unchecked, 0.4s Time] [2021-12-06 19:31:14,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 19:31:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 179. [2021-12-06 19:31:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 143 states have (on average 1.3916083916083917) internal successors, (199), 147 states have internal predecessors, (199), 22 states have call successors, (22), 11 states have call predecessors, (22), 13 states have return successors, (29), 20 states have call predecessors, (29), 21 states have call successors, (29) [2021-12-06 19:31:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 250 transitions. [2021-12-06 19:31:14,620 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 250 transitions. Word has length 72 [2021-12-06 19:31:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:14,620 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 250 transitions. [2021-12-06 19:31:14,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 22 states have internal predecessors, (91), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 250 transitions. [2021-12-06 19:31:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 19:31:14,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:14,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:14,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:31:14,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:14,823 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1208498679, now seen corresponding path program 1 times [2021-12-06 19:31:14,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:14,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086974101] [2021-12-06 19:31:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:14,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:15,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:15,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:15,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:15,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:15,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:15,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:15,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:15,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:31:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:15,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:15,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086974101] [2021-12-06 19:31:15,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086974101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:15,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114911829] [2021-12-06 19:31:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:15,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:15,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:15,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:15,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:31:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:15,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 19:31:15,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:15,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:16,066 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-06 19:31:16,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-06 19:31:16,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:16,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:16,382 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-06 19:31:16,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2021-12-06 19:31:16,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 19:31:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:16,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:16,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114911829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:16,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:16,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-06 19:31:16,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472078472] [2021-12-06 19:31:16,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:16,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:31:16,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:31:16,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-06 19:31:16,632 INFO L87 Difference]: Start difference. First operand 179 states and 250 transitions. Second operand has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:17,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:17,466 INFO L93 Difference]: Finished difference Result 244 states and 346 transitions. [2021-12-06 19:31:17,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 19:31:17,467 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 73 [2021-12-06 19:31:17,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:17,469 INFO L225 Difference]: With dead ends: 244 [2021-12-06 19:31:17,469 INFO L226 Difference]: Without dead ends: 209 [2021-12-06 19:31:17,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=249, Invalid=2102, Unknown=1, NotChecked=0, Total=2352 [2021-12-06 19:31:17,470 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 83 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:17,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1913 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 911 Invalid, 0 Unknown, 614 Unchecked, 0.4s Time] [2021-12-06 19:31:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-06 19:31:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 187. [2021-12-06 19:31:17,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 148 states have (on average 1.385135135135135) internal successors, (205), 153 states have internal predecessors, (205), 24 states have call successors, (24), 11 states have call predecessors, (24), 14 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2021-12-06 19:31:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 262 transitions. [2021-12-06 19:31:17,484 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 262 transitions. Word has length 73 [2021-12-06 19:31:17,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:17,484 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 262 transitions. [2021-12-06 19:31:17,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:17,484 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 262 transitions. [2021-12-06 19:31:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 19:31:17,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:17,486 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:17,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:31:17,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:17,688 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash -994417807, now seen corresponding path program 1 times [2021-12-06 19:31:17,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:17,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919953829] [2021-12-06 19:31:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:17,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:17,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:17,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:17,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:17,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:17,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:17,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:18,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 19:31:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:18,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919953829] [2021-12-06 19:31:18,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919953829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154375601] [2021-12-06 19:31:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:18,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:18,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:18,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:18,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:31:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2590 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 19:31:18,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:18,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-06 19:31:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:18,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:18,909 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-06 19:31:18,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-12-06 19:31:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:18,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154375601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:18,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:31:18,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 27 [2021-12-06 19:31:18,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144802982] [2021-12-06 19:31:18,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:18,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 19:31:18,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:18,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 19:31:18,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-12-06 19:31:18,927 INFO L87 Difference]: Start difference. First operand 187 states and 262 transitions. Second operand has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-06 19:31:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:20,747 INFO L93 Difference]: Finished difference Result 391 states and 566 transitions. [2021-12-06 19:31:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:31:20,747 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) Word has length 73 [2021-12-06 19:31:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:20,749 INFO L225 Difference]: With dead ends: 391 [2021-12-06 19:31:20,749 INFO L226 Difference]: Without dead ends: 356 [2021-12-06 19:31:20,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 19:31:20,751 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 647 mSDsluCounter, 2062 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 3685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:20,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 2266 Invalid, 3685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 3109 Invalid, 0 Unknown, 528 Unchecked, 1.3s Time] [2021-12-06 19:31:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-06 19:31:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 248. [2021-12-06 19:31:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 217 states have internal predecessors, (311), 21 states have call successors, (21), 11 states have call predecessors, (21), 14 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 19:31:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 360 transitions. [2021-12-06 19:31:20,766 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 360 transitions. Word has length 73 [2021-12-06 19:31:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:20,767 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 360 transitions. [2021-12-06 19:31:20,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-06 19:31:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 360 transitions. [2021-12-06 19:31:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 19:31:20,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:20,768 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:20,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:31:20,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 19:31:20,970 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:20,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1569134765, now seen corresponding path program 1 times [2021-12-06 19:31:20,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:20,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753061618] [2021-12-06 19:31:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:20,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:21,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:21,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:21,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:21,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:21,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:21,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:21,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:21,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 19:31:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:21,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753061618] [2021-12-06 19:31:21,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753061618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104304486] [2021-12-06 19:31:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:21,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:21,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:21,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:21,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:31:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:21,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 19:31:21,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:21,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:22,105 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-06 19:31:22,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-06 19:31:22,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:22,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:22,439 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-12-06 19:31:22,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 70 [2021-12-06 19:31:22,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 19:31:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:22,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:22,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104304486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:22,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:22,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-06 19:31:22,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685341926] [2021-12-06 19:31:22,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:22,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:31:22,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:22,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:31:22,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-06 19:31:22,714 INFO L87 Difference]: Start difference. First operand 248 states and 360 transitions. Second operand has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:23,508 INFO L93 Difference]: Finished difference Result 372 states and 539 transitions. [2021-12-06 19:31:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 19:31:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 74 [2021-12-06 19:31:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:23,510 INFO L225 Difference]: With dead ends: 372 [2021-12-06 19:31:23,510 INFO L226 Difference]: Without dead ends: 337 [2021-12-06 19:31:23,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=218, Invalid=1943, Unknown=1, NotChecked=0, Total=2162 [2021-12-06 19:31:23,512 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 154 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1281 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:23,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1964 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 903 Invalid, 0 Unknown, 1281 Unchecked, 0.4s Time] [2021-12-06 19:31:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-06 19:31:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 248. [2021-12-06 19:31:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 217 states have internal predecessors, (311), 21 states have call successors, (21), 11 states have call predecessors, (21), 14 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 19:31:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 360 transitions. [2021-12-06 19:31:23,528 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 360 transitions. Word has length 74 [2021-12-06 19:31:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:23,528 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 360 transitions. [2021-12-06 19:31:23,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 360 transitions. [2021-12-06 19:31:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 19:31:23,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:23,530 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:23,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:31:23,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 19:31:23,730 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:23,731 INFO L85 PathProgramCache]: Analyzing trace with hash -7761607, now seen corresponding path program 1 times [2021-12-06 19:31:23,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:23,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122681392] [2021-12-06 19:31:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:23,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:23,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:23,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:23,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:23,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:23,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:23,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:23,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:23,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 19:31:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:23,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:23,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122681392] [2021-12-06 19:31:23,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122681392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:23,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006123449] [2021-12-06 19:31:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:23,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:23,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:23,964 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:23,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:31:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:24,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 19:31:24,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:24,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:24,856 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-06 19:31:24,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-06 19:31:25,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:25,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 28 [2021-12-06 19:31:25,088 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-06 19:31:25,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-06 19:31:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:25,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:25,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006123449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:25,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:25,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-12-06 19:31:25,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039819284] [2021-12-06 19:31:25,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:25,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 19:31:25,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:25,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 19:31:25,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1004, Unknown=4, NotChecked=0, Total=1122 [2021-12-06 19:31:25,585 INFO L87 Difference]: Start difference. First operand 248 states and 360 transitions. Second operand has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 24 states have internal predecessors, (96), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-06 19:31:26,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:26,596 INFO L93 Difference]: Finished difference Result 333 states and 463 transitions. [2021-12-06 19:31:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 19:31:26,596 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 24 states have internal predecessors, (96), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 74 [2021-12-06 19:31:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:26,598 INFO L225 Difference]: With dead ends: 333 [2021-12-06 19:31:26,598 INFO L226 Difference]: Without dead ends: 298 [2021-12-06 19:31:26,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=268, Invalid=2480, Unknown=8, NotChecked=0, Total=2756 [2021-12-06 19:31:26,600 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 66 mSDsluCounter, 2100 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 953 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:26,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2283 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1007 Invalid, 0 Unknown, 953 Unchecked, 0.5s Time] [2021-12-06 19:31:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-06 19:31:26,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 248. [2021-12-06 19:31:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 217 states have internal predecessors, (311), 21 states have call successors, (21), 11 states have call predecessors, (21), 14 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 19:31:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 360 transitions. [2021-12-06 19:31:26,613 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 360 transitions. Word has length 74 [2021-12-06 19:31:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:26,614 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 360 transitions. [2021-12-06 19:31:26,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 24 states have internal predecessors, (96), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-06 19:31:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 360 transitions. [2021-12-06 19:31:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 19:31:26,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:26,615 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:26,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:31:26,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:31:26,816 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:26,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:26,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1464298396, now seen corresponding path program 1 times [2021-12-06 19:31:26,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:26,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712837154] [2021-12-06 19:31:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:26,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:26,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:26,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:26,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:27,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:27,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:27,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:27,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:27,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 19:31:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:27,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:27,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712837154] [2021-12-06 19:31:27,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712837154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:27,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030241207] [2021-12-06 19:31:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:27,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:27,108 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:27,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:31:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:27,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 19:31:27,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:27,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:27,984 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-06 19:31:27,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-06 19:31:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:28,311 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-12-06 19:31:28,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 70 [2021-12-06 19:31:28,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 19:31:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:28,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:28,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030241207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:28,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:28,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-06 19:31:28,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101952039] [2021-12-06 19:31:28,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:28,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:31:28,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:28,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:31:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2021-12-06 19:31:28,589 INFO L87 Difference]: Start difference. First operand 248 states and 360 transitions. Second operand has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:29,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:29,152 INFO L93 Difference]: Finished difference Result 363 states and 517 transitions. [2021-12-06 19:31:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:31:29,152 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 75 [2021-12-06 19:31:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:29,154 INFO L225 Difference]: With dead ends: 363 [2021-12-06 19:31:29,154 INFO L226 Difference]: Without dead ends: 328 [2021-12-06 19:31:29,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=1767, Unknown=1, NotChecked=0, Total=1980 [2021-12-06 19:31:29,156 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 152 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1198 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:29,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1762 Invalid, 1725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 473 Invalid, 0 Unknown, 1198 Unchecked, 0.2s Time] [2021-12-06 19:31:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-12-06 19:31:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 248. [2021-12-06 19:31:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 217 states have internal predecessors, (311), 21 states have call successors, (21), 11 states have call predecessors, (21), 14 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 19:31:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 360 transitions. [2021-12-06 19:31:29,170 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 360 transitions. Word has length 75 [2021-12-06 19:31:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:29,170 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 360 transitions. [2021-12-06 19:31:29,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 360 transitions. [2021-12-06 19:31:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 19:31:29,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:29,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:29,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:31:29,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:31:29,373 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:29,374 INFO L85 PathProgramCache]: Analyzing trace with hash 185282190, now seen corresponding path program 1 times [2021-12-06 19:31:29,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:29,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440733440] [2021-12-06 19:31:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:29,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:29,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:29,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:29,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:29,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:29,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:29,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:29,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:29,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 19:31:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:29,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:29,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440733440] [2021-12-06 19:31:29,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440733440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:29,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903623425] [2021-12-06 19:31:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:29,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:29,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:29,628 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:29,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:31:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:29,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 19:31:29,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:29,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:30,500 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-06 19:31:30,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 34 [2021-12-06 19:31:30,827 INFO L354 Elim1Store]: treesize reduction 97, result has 1.0 percent of original size [2021-12-06 19:31:30,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 36 treesize of output 23 [2021-12-06 19:31:30,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 19:31:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:30,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:31,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903623425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:31,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:31,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-06 19:31:31,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409756327] [2021-12-06 19:31:31,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:31,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:31:31,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:31,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:31:31,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=836, Unknown=1, NotChecked=0, Total=930 [2021-12-06 19:31:31,081 INFO L87 Difference]: Start difference. First operand 248 states and 360 transitions. Second operand has 26 states, 24 states have (on average 4.125) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:31,759 INFO L93 Difference]: Finished difference Result 327 states and 470 transitions. [2021-12-06 19:31:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 19:31:31,760 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.125) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 76 [2021-12-06 19:31:31,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:31,762 INFO L225 Difference]: With dead ends: 327 [2021-12-06 19:31:31,762 INFO L226 Difference]: Without dead ends: 292 [2021-12-06 19:31:31,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=208, Invalid=1771, Unknown=1, NotChecked=0, Total=1980 [2021-12-06 19:31:31,763 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 60 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 462 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:31,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1866 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 672 Invalid, 0 Unknown, 462 Unchecked, 0.4s Time] [2021-12-06 19:31:31,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-12-06 19:31:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 248. [2021-12-06 19:31:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 217 states have internal predecessors, (311), 21 states have call successors, (21), 11 states have call predecessors, (21), 14 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 19:31:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 360 transitions. [2021-12-06 19:31:31,777 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 360 transitions. Word has length 76 [2021-12-06 19:31:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:31,777 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 360 transitions. [2021-12-06 19:31:31,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.125) internal successors, (99), 22 states have internal predecessors, (99), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 360 transitions. [2021-12-06 19:31:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 19:31:31,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:31,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 19:31:31,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:31:31,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:31:31,980 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:31,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2075820768, now seen corresponding path program 2 times [2021-12-06 19:31:31,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:31,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315484765] [2021-12-06 19:31:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:31,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:32,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:32,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:32,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:32,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 19:31:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:32,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 19:31:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:32,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 19:31:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:32,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 19:31:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:32,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 19:31:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 19:31:32,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:32,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315484765] [2021-12-06 19:31:32,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315484765] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:32,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906611037] [2021-12-06 19:31:32,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:31:32,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:32,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:32,223 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:32,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:31:35,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:31:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:31:35,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 19:31:35,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:31:35,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:35,911 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-06 19:31:35,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-12-06 19:31:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 19:31:35,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906611037] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:31:35,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:31:35,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 26 [2021-12-06 19:31:35,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659812170] [2021-12-06 19:31:35,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:35,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:31:35,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:35,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:31:35,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:31:35,928 INFO L87 Difference]: Start difference. First operand 248 states and 360 transitions. Second operand has 26 states, 23 states have (on average 4.739130434782608) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 6 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-06 19:31:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:37,095 INFO L93 Difference]: Finished difference Result 461 states and 664 transitions. [2021-12-06 19:31:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:31:37,095 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 4.739130434782608) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 6 states have call predecessors, (21), 9 states have call successors, (21) Word has length 76 [2021-12-06 19:31:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:37,097 INFO L225 Difference]: With dead ends: 461 [2021-12-06 19:31:37,097 INFO L226 Difference]: Without dead ends: 272 [2021-12-06 19:31:37,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 19:31:37,098 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 209 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:37,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 1089 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1651 Invalid, 0 Unknown, 258 Unchecked, 0.8s Time] [2021-12-06 19:31:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-06 19:31:37,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 248. [2021-12-06 19:31:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 214 states have (on average 1.4626168224299065) internal successors, (313), 217 states have internal predecessors, (313), 19 states have call successors, (19), 13 states have call predecessors, (19), 14 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) [2021-12-06 19:31:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 355 transitions. [2021-12-06 19:31:37,110 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 355 transitions. Word has length 76 [2021-12-06 19:31:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:37,110 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 355 transitions. [2021-12-06 19:31:37,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 4.739130434782608) internal successors, (109), 22 states have internal predecessors, (109), 9 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 6 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-06 19:31:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 355 transitions. [2021-12-06 19:31:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 19:31:37,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:37,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:37,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 19:31:37,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 19:31:37,312 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1817674049, now seen corresponding path program 1 times [2021-12-06 19:31:37,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:37,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810319595] [2021-12-06 19:31:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:37,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:37,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:37,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:37,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:37,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:37,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:37,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:37,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:37,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:31:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:37,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:37,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810319595] [2021-12-06 19:31:37,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810319595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:37,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593997078] [2021-12-06 19:31:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:37,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:37,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:37,526 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:37,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:31:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:37,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 19:31:37,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:37,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:38,372 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-06 19:31:38,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 34 [2021-12-06 19:31:38,714 INFO L354 Elim1Store]: treesize reduction 97, result has 1.0 percent of original size [2021-12-06 19:31:38,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 36 treesize of output 23 [2021-12-06 19:31:38,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 19:31:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:38,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:38,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593997078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:38,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:38,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-06 19:31:38,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924406914] [2021-12-06 19:31:38,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:38,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:31:38,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:38,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:31:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=835, Unknown=1, NotChecked=0, Total=930 [2021-12-06 19:31:38,980 INFO L87 Difference]: Start difference. First operand 248 states and 355 transitions. Second operand has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:39,584 INFO L93 Difference]: Finished difference Result 371 states and 526 transitions. [2021-12-06 19:31:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 19:31:39,584 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2021-12-06 19:31:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:39,586 INFO L225 Difference]: With dead ends: 371 [2021-12-06 19:31:39,586 INFO L226 Difference]: Without dead ends: 336 [2021-12-06 19:31:39,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=1622, Unknown=1, NotChecked=0, Total=1806 [2021-12-06 19:31:39,587 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 127 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 2170 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1482 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:39,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 2170 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 653 Invalid, 0 Unknown, 1482 Unchecked, 0.3s Time] [2021-12-06 19:31:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-06 19:31:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 248. [2021-12-06 19:31:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 214 states have (on average 1.4626168224299065) internal successors, (313), 217 states have internal predecessors, (313), 19 states have call successors, (19), 13 states have call predecessors, (19), 14 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) [2021-12-06 19:31:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 355 transitions. [2021-12-06 19:31:39,600 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 355 transitions. Word has length 77 [2021-12-06 19:31:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:39,600 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 355 transitions. [2021-12-06 19:31:39,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.208333333333333) internal successors, (101), 22 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 355 transitions. [2021-12-06 19:31:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 19:31:39,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:39,602 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:39,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 19:31:39,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:39,802 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:39,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1265263437, now seen corresponding path program 1 times [2021-12-06 19:31:39,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:39,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131867837] [2021-12-06 19:31:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:39,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:39,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:39,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:39,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:39,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:39,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:39,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:39,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:40,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:31:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:40,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131867837] [2021-12-06 19:31:40,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131867837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:40,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725912626] [2021-12-06 19:31:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:40,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:40,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:40,045 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:40,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:31:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:40,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 19:31:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:40,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:40,886 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-06 19:31:40,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-06 19:31:41,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:41,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:41,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:41,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 28 [2021-12-06 19:31:41,138 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-06 19:31:41,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-06 19:31:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:41,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:41,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725912626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:41,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:41,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 30 [2021-12-06 19:31:41,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041108990] [2021-12-06 19:31:41,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:41,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 19:31:41,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:41,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 19:31:41,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1070, Unknown=4, NotChecked=0, Total=1190 [2021-12-06 19:31:41,626 INFO L87 Difference]: Start difference. First operand 248 states and 355 transitions. Second operand has 30 states, 28 states have (on average 3.642857142857143) internal successors, (102), 25 states have internal predecessors, (102), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-06 19:31:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:42,612 INFO L93 Difference]: Finished difference Result 343 states and 484 transitions. [2021-12-06 19:31:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 19:31:42,612 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.642857142857143) internal successors, (102), 25 states have internal predecessors, (102), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 77 [2021-12-06 19:31:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:42,614 INFO L225 Difference]: With dead ends: 343 [2021-12-06 19:31:42,614 INFO L226 Difference]: Without dead ends: 308 [2021-12-06 19:31:42,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=285, Invalid=2784, Unknown=11, NotChecked=0, Total=3080 [2021-12-06 19:31:42,616 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 115 mSDsluCounter, 2204 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 987 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:42,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 2400 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 833 Invalid, 0 Unknown, 987 Unchecked, 0.4s Time] [2021-12-06 19:31:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-06 19:31:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 264. [2021-12-06 19:31:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 230 states have (on average 1.4782608695652173) internal successors, (340), 233 states have internal predecessors, (340), 19 states have call successors, (19), 13 states have call predecessors, (19), 14 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) [2021-12-06 19:31:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 382 transitions. [2021-12-06 19:31:42,628 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 382 transitions. Word has length 77 [2021-12-06 19:31:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:42,629 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 382 transitions. [2021-12-06 19:31:42,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.642857142857143) internal successors, (102), 25 states have internal predecessors, (102), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-06 19:31:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 382 transitions. [2021-12-06 19:31:42,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 19:31:42,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:42,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:42,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:31:42,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 19:31:42,831 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1399276943, now seen corresponding path program 1 times [2021-12-06 19:31:42,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:42,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077811989] [2021-12-06 19:31:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:42,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:42,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:42,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:42,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:42,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:42,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:42,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:43,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:43,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 19:31:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:43,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077811989] [2021-12-06 19:31:43,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077811989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705705375] [2021-12-06 19:31:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:43,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:43,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:43,064 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:43,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:31:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:43,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 2597 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 19:31:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:43,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:43,903 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-12-06 19:31:43,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:31:44,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:44,273 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-12-06 19:31:44,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 28 [2021-12-06 19:31:44,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 19:31:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:44,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:44,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705705375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:44,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:44,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2021-12-06 19:31:44,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065572806] [2021-12-06 19:31:44,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:44,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 19:31:44,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:44,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 19:31:44,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=950, Unknown=1, NotChecked=0, Total=1056 [2021-12-06 19:31:44,518 INFO L87 Difference]: Start difference. First operand 264 states and 382 transitions. Second operand has 28 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 24 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:45,354 INFO L93 Difference]: Finished difference Result 346 states and 485 transitions. [2021-12-06 19:31:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 19:31:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 24 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 77 [2021-12-06 19:31:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:45,356 INFO L225 Difference]: With dead ends: 346 [2021-12-06 19:31:45,356 INFO L226 Difference]: Without dead ends: 311 [2021-12-06 19:31:45,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=2116, Unknown=2, NotChecked=0, Total=2352 [2021-12-06 19:31:45,357 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 56 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 781 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:45,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1923 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 979 Invalid, 0 Unknown, 781 Unchecked, 0.4s Time] [2021-12-06 19:31:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-06 19:31:45,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 264. [2021-12-06 19:31:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 230 states have (on average 1.4782608695652173) internal successors, (340), 233 states have internal predecessors, (340), 19 states have call successors, (19), 13 states have call predecessors, (19), 14 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) [2021-12-06 19:31:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 382 transitions. [2021-12-06 19:31:45,370 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 382 transitions. Word has length 77 [2021-12-06 19:31:45,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:45,370 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 382 transitions. [2021-12-06 19:31:45,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.8846153846153846) internal successors, (101), 24 states have internal predecessors, (101), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:45,370 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 382 transitions. [2021-12-06 19:31:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 19:31:45,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:45,372 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:45,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:31:45,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:31:45,572 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1085154871, now seen corresponding path program 1 times [2021-12-06 19:31:45,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:45,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423034390] [2021-12-06 19:31:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:45,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 19:31:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:45,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423034390] [2021-12-06 19:31:45,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423034390] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777986011] [2021-12-06 19:31:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:45,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:45,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:45,783 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:45,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:31:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:46,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 19:31:46,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:46,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:46,593 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-12-06 19:31:46,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 34 [2021-12-06 19:31:46,936 INFO L354 Elim1Store]: treesize reduction 204, result has 0.5 percent of original size [2021-12-06 19:31:46,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 44 [2021-12-06 19:31:46,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:31:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:31:46,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:31:47,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777986011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:47,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:31:47,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-12-06 19:31:47,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788613572] [2021-12-06 19:31:47,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:47,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:31:47,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:31:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=836, Unknown=1, NotChecked=0, Total=930 [2021-12-06 19:31:47,216 INFO L87 Difference]: Start difference. First operand 264 states and 382 transitions. Second operand has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:31:47,947 INFO L93 Difference]: Finished difference Result 399 states and 572 transitions. [2021-12-06 19:31:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 19:31:47,948 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 78 [2021-12-06 19:31:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:31:47,949 INFO L225 Difference]: With dead ends: 399 [2021-12-06 19:31:47,949 INFO L226 Difference]: Without dead ends: 364 [2021-12-06 19:31:47,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=1848, Unknown=1, NotChecked=0, Total=2070 [2021-12-06 19:31:47,951 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 206 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1389 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:47,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 2051 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 676 Invalid, 0 Unknown, 1389 Unchecked, 0.4s Time] [2021-12-06 19:31:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-06 19:31:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 264. [2021-12-06 19:31:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 230 states have (on average 1.4782608695652173) internal successors, (340), 233 states have internal predecessors, (340), 19 states have call successors, (19), 13 states have call predecessors, (19), 14 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) [2021-12-06 19:31:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 382 transitions. [2021-12-06 19:31:47,964 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 382 transitions. Word has length 78 [2021-12-06 19:31:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:31:47,964 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 382 transitions. [2021-12-06 19:31:47,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.291666666666667) internal successors, (103), 22 states have internal predecessors, (103), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-06 19:31:47,965 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 382 transitions. [2021-12-06 19:31:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 19:31:47,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:31:47,966 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:31:48,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 19:31:48,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 19:31:48,166 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:31:48,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:31:48,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1452243686, now seen corresponding path program 1 times [2021-12-06 19:31:48,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:31:48,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285392563] [2021-12-06 19:31:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:48,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:31:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:48,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 19:31:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:48,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 19:31:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:48,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 19:31:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:48,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:31:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:48,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 19:31:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:48,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 19:31:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:48,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-06 19:31:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:48,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:31:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:31:48,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:31:48,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285392563] [2021-12-06 19:31:48,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285392563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:31:48,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597758643] [2021-12-06 19:31:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:31:48,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:31:48,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:48,370 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:31:48,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:31:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:31:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 19:31:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:31:48,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:31:49,194 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-12-06 19:31:49,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2021-12-06 19:31:49,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:49,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:31:49,438 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-06 19:31:49,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 78 [2021-12-06 19:31:49,461 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 19:31:49,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 19:31:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 19:31:49,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-06 19:31:49,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-12-06 19:31:49,625 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-06 19:31:49,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:31:49,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-06 19:31:49,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738995514] [2021-12-06 19:31:49,626 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:31:49,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 19:31:49,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:31:49,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 19:31:49,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=483, Unknown=2, NotChecked=0, Total=552 [2021-12-06 19:31:49,627 INFO L87 Difference]: Start difference. First operand 264 states and 382 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 19:31:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:31:49,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=483, Unknown=2, NotChecked=0, Total=552 [2021-12-06 19:31:49,629 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:31:49,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:31:49,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 19:31:49,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:31:49,831 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@35de95c1 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 19:31:49,834 INFO L158 Benchmark]: Toolchain (without parser) took 94072.27ms. Allocated memory was 98.6MB in the beginning and 310.4MB in the end (delta: 211.8MB). Free memory was 70.7MB in the beginning and 77.8MB in the end (delta: -7.1MB). Peak memory consumption was 203.5MB. Max. memory is 16.1GB. [2021-12-06 19:31:49,834 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 81.8MB. Free memory was 44.7MB in the beginning and 44.6MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:31:49,834 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2669.90ms. Allocated memory was 98.6MB in the beginning and 144.7MB in the end (delta: 46.1MB). Free memory was 70.5MB in the beginning and 65.9MB in the end (delta: 4.6MB). Peak memory consumption was 68.3MB. Max. memory is 16.1GB. [2021-12-06 19:31:49,835 INFO L158 Benchmark]: Boogie Procedure Inliner took 150.05ms. Allocated memory is still 144.7MB. Free memory was 65.9MB in the beginning and 52.7MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 19:31:49,835 INFO L158 Benchmark]: Boogie Preprocessor took 85.33ms. Allocated memory is still 144.7MB. Free memory was 52.7MB in the beginning and 75.6MB in the end (delta: -22.9MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2021-12-06 19:31:49,835 INFO L158 Benchmark]: RCFGBuilder took 1240.18ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 75.6MB in the beginning and 71.1MB in the end (delta: 4.5MB). Peak memory consumption was 42.5MB. Max. memory is 16.1GB. [2021-12-06 19:31:49,835 INFO L158 Benchmark]: TraceAbstraction took 89919.05ms. Allocated memory was 174.1MB in the beginning and 310.4MB in the end (delta: 136.3MB). Free memory was 70.2MB in the beginning and 77.8MB in the end (delta: -7.7MB). Peak memory consumption was 130.6MB. Max. memory is 16.1GB. [2021-12-06 19:31:49,837 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 81.8MB. Free memory was 44.7MB in the beginning and 44.6MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2669.90ms. Allocated memory was 98.6MB in the beginning and 144.7MB in the end (delta: 46.1MB). Free memory was 70.5MB in the beginning and 65.9MB in the end (delta: 4.6MB). Peak memory consumption was 68.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 150.05ms. Allocated memory is still 144.7MB. Free memory was 65.9MB in the beginning and 52.7MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 85.33ms. Allocated memory is still 144.7MB. Free memory was 52.7MB in the beginning and 75.6MB in the end (delta: -22.9MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. * RCFGBuilder took 1240.18ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 75.6MB in the beginning and 71.1MB in the end (delta: 4.5MB). Peak memory consumption was 42.5MB. Max. memory is 16.1GB. * TraceAbstraction took 89919.05ms. Allocated memory was 174.1MB in the beginning and 310.4MB in the end (delta: 136.3MB). Free memory was 70.2MB in the beginning and 77.8MB in the end (delta: -7.7MB). Peak memory consumption was 130.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@35de95c1 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@35de95c1: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-06 19:31:49,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa --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 ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:31:51,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:31:51,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:31:51,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:31:51,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:31:51,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:31:51,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:31:51,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:31:51,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:31:51,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:31:51,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:31:51,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:31:51,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:31:51,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:31:51,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:31:51,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:31:51,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:31:51,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:31:51,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:31:51,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:31:51,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:31:51,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:31:51,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:31:51,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:31:51,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:31:51,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:31:51,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:31:51,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:31:51,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:31:51,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:31:51,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:31:51,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:31:51,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:31:51,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:31:51,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:31:51,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:31:51,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:31:51,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:31:51,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:31:51,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:31:51,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:31:51,456 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-12-06 19:31:51,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:31:51,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:31:51,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:31:51,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:31:51,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:31:51,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:31:51,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:31:51,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:31:51,485 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:31:51,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:31:51,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:31:51,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:31:51,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:31:51,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:31:51,486 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:31:51,486 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 19:31:51,486 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 19:31:51,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:31:51,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:31:51,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:31:51,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:31:51,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:31:51,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:31:51,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:31:51,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:31:51,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:31:51,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:31:51,488 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 19:31:51,488 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 19:31:51,488 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:31:51,488 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:31:51,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:31:51,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:31:51,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 19:31:51,489 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 [2021-12-06 19:31:51,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:31:51,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:31:51,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:31:51,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:31:51,748 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:31:51,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-12-06 19:31:51,791 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/data/97780d1d8/b5a9b7b65ca24b3eb404147ae3031fcf/FLAG2b541c49f [2021-12-06 19:31:52,403 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:31:52,403 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2021-12-06 19:31:52,445 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/data/97780d1d8/b5a9b7b65ca24b3eb404147ae3031fcf/FLAG2b541c49f [2021-12-06 19:31:52,845 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/data/97780d1d8/b5a9b7b65ca24b3eb404147ae3031fcf [2021-12-06 19:31:52,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:31:52,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:31:52,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:31:52,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:31:52,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:31:52,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:31:52" (1/1) ... [2021-12-06 19:31:52,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4558bf3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:52, skipping insertion in model container [2021-12-06 19:31:52,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:31:52" (1/1) ... [2021-12-06 19:31:52,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:31:52,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:31:53,226 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-06 19:31:53,232 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-06 19:31:54,147 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:54,147 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:54,148 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:54,149 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:54,150 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:54,163 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:54,164 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:54,165 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:54,165 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:54,568 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:31:54,569 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:31:54,569 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:31:54,570 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:31:54,571 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:31:54,572 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:31:54,572 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:31:54,572 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:31:54,573 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:31:54,573 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:31:54,735 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:31:54,807 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:54,807 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,067 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,068 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,085 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,086 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,090 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,101 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,102 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,102 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,102 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,103 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,103 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,103 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:31:55,174 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-06 19:31:55,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:31:55,274 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-06 19:31:55,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-06 19:31:55,304 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,304 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,305 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,305 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,306 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,311 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,311 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,312 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,312 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,337 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:31:55,338 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:31:55,339 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:31:55,339 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:31:55,340 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:31:55,340 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:31:55,340 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:31:55,341 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:31:55,341 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:31:55,341 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:31:55,368 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:31:55,400 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,400 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,467 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,467 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,472 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,473 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,474 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,474 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,479 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,480 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,480 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,480 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,480 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,481 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,481 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:31:55,548 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:31:55,562 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2021-12-06 19:31:55,563 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2021-12-06 19:31:55,595 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,595 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,596 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,596 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,597 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,602 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,603 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,604 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,604 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,623 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 19:31:55,624 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 19:31:55,624 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 19:31:55,624 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 19:31:55,625 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 19:31:55,625 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 19:31:55,625 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 19:31:55,626 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 19:31:55,626 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 19:31:55,626 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 19:31:55,652 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 19:31:55,683 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,683 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,740 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,741 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,745 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,746 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,747 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,753 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,754 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,754 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,754 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,754 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,755 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,755 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 19:31:55,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:31:56,014 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:31:56,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56 WrapperNode [2021-12-06 19:31:56,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:31:56,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:31:56,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:31:56,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:31:56,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (1/1) ... [2021-12-06 19:31:56,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (1/1) ... [2021-12-06 19:31:56,161 INFO L137 Inliner]: procedures = 796, calls = 3576, calls flagged for inlining = 79, calls inlined = 6, statements flattened = 788 [2021-12-06 19:31:56,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:31:56,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:31:56,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:31:56,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:31:56,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (1/1) ... [2021-12-06 19:31:56,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (1/1) ... [2021-12-06 19:31:56,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (1/1) ... [2021-12-06 19:31:56,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (1/1) ... [2021-12-06 19:31:56,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (1/1) ... [2021-12-06 19:31:56,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (1/1) ... [2021-12-06 19:31:56,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (1/1) ... [2021-12-06 19:31:56,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:31:56,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:31:56,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:31:56,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:31:56,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (1/1) ... [2021-12-06 19:31:56,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:31:56,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:31:56,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:31:56,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:31:56,305 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-06 19:31:56,305 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-06 19:31:56,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 19:31:56,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 19:31:56,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:31:56,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:31:56,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:31:56,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:31:56,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:31:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-06 19:31:56,306 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-06 19:31:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:31:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:31:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure hashlittle2 [2021-12-06 19:31:56,306 INFO L138 BoogieDeclarations]: Found implementation of procedure hashlittle2 [2021-12-06 19:31:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-12-06 19:31:56,306 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-12-06 19:31:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:31:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 19:31:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-12-06 19:31:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-06 19:31:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-12-06 19:31:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 19:31:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-12-06 19:31:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 19:31:56,307 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 19:31:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 19:31:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 19:31:56,489 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:31:56,491 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:32:00,781 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2021-12-06 19:32:00,790 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:32:00,798 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:32:00,798 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-06 19:32:00,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:32:00 BoogieIcfgContainer [2021-12-06 19:32:00,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:32:00,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:32:00,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:32:00,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:32:00,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:31:52" (1/3) ... [2021-12-06 19:32:00,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751b4928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:32:00, skipping insertion in model container [2021-12-06 19:32:00,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:31:56" (2/3) ... [2021-12-06 19:32:00,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751b4928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:32:00, skipping insertion in model container [2021-12-06 19:32:00,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:32:00" (3/3) ... [2021-12-06 19:32:00,807 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_byte_cursor_ptr_harness.i [2021-12-06 19:32:00,811 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:32:00,811 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:32:00,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:32:00,853 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:32:00,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:32:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-06 19:32:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 19:32:00,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:32:00,875 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:32:00,875 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:32:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:32:00,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1196197405, now seen corresponding path program 1 times [2021-12-06 19:32:00,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:32:00,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429977933] [2021-12-06 19:32:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:32:00,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:32:00,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:32:00,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:32:00,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 19:32:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:01,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 19:32:01,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:32:01,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:32:01,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:32:01,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429977933] [2021-12-06 19:32:01,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429977933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:32:01,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:32:01,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:32:01,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000384882] [2021-12-06 19:32:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:32:01,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:32:01,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:32:01,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:32:01,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:32:01,763 INFO L87 Difference]: Start difference. First operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:32:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:32:01,799 INFO L93 Difference]: Finished difference Result 263 states and 398 transitions. [2021-12-06 19:32:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:32:01,801 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-06 19:32:01,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:32:01,810 INFO L225 Difference]: With dead ends: 263 [2021-12-06 19:32:01,811 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 19:32:01,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:32:01,818 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:32:01,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:32:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 19:32:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-06 19:32:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 109 states have internal predecessors, (161), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 19:32:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2021-12-06 19:32:01,858 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 62 [2021-12-06 19:32:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:32:01,859 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2021-12-06 19:32:01,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:32:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2021-12-06 19:32:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 19:32:01,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:32:01,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:32:01,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:32:02,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:32:02,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:32:02,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:32:02,067 INFO L85 PathProgramCache]: Analyzing trace with hash -902599839, now seen corresponding path program 1 times [2021-12-06 19:32:02,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:32:02,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026264331] [2021-12-06 19:32:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:32:02,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:32:02,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:32:02,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:32:02,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 19:32:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:32:02,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 19:32:03,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:32:03,006 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:32:03,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026264331] [2021-12-06 19:32:03,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026264331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:32:03,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:32:03,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:32:03,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137906708] [2021-12-06 19:32:03,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:32:03,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:32:03,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:32:03,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:32:03,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:32:03,009 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:32:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:32:03,092 INFO L93 Difference]: Finished difference Result 239 states and 354 transitions. [2021-12-06 19:32:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:32:03,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-12-06 19:32:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:32:03,096 INFO L225 Difference]: With dead ends: 239 [2021-12-06 19:32:03,096 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 19:32:03,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:32:03,098 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 22 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:32:03,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 513 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:32:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 19:32:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-06 19:32:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-12-06 19:32:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2021-12-06 19:32:03,114 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 62 [2021-12-06 19:32:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:32:03,115 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2021-12-06 19:32:03,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:32:03,115 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2021-12-06 19:32:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:32:03,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:32:03,119 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:32:03,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 19:32:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:32:03,320 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:32:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:32:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash 90546502, now seen corresponding path program 1 times [2021-12-06 19:32:03,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:32:03,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967350614] [2021-12-06 19:32:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:32:03,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:32:03,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:32:03,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:32:03,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 19:32:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:04,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:32:04,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:32:04,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:32:04,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:32:04,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967350614] [2021-12-06 19:32:04,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967350614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:32:04,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:32:04,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:32:04,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419495366] [2021-12-06 19:32:04,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:32:04,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:32:04,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:32:04,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:32:04,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:32:04,169 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 19:32:04,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:32:04,262 INFO L93 Difference]: Finished difference Result 239 states and 350 transitions. [2021-12-06 19:32:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:32:04,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2021-12-06 19:32:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:32:04,264 INFO L225 Difference]: With dead ends: 239 [2021-12-06 19:32:04,265 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 19:32:04,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:32:04,266 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 26 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:32:04,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 685 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:32:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 19:32:04,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-06 19:32:04,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-06 19:32:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 189 transitions. [2021-12-06 19:32:04,279 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 189 transitions. Word has length 64 [2021-12-06 19:32:04,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:32:04,279 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 189 transitions. [2021-12-06 19:32:04,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 19:32:04,279 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 189 transitions. [2021-12-06 19:32:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 19:32:04,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:32:04,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:32:04,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-06 19:32:04,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:32:04,484 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:32:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:32:04,486 INFO L85 PathProgramCache]: Analyzing trace with hash -249804501, now seen corresponding path program 2 times [2021-12-06 19:32:04,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:32:04,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215008162] [2021-12-06 19:32:04,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:32:04,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:32:04,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:32:04,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:32:04,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 19:32:45,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:32:45,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:32:46,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 19:32:46,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:32:46,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:32:46,406 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:32:46,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215008162] [2021-12-06 19:32:46,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215008162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:32:46,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:32:46,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:32:46,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322458919] [2021-12-06 19:32:46,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:32:46,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:32:46,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:32:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:32:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:32:46,408 INFO L87 Difference]: Start difference. First operand 131 states and 189 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 19:32:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:32:46,524 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2021-12-06 19:32:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:32:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 66 [2021-12-06 19:32:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:32:46,526 INFO L225 Difference]: With dead ends: 158 [2021-12-06 19:32:46,526 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 19:32:46,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:32:46,527 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 28 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:32:46,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1026 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:32:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 19:32:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-06 19:32:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 109 states have internal predecessors, (160), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 19:32:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2021-12-06 19:32:46,539 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 66 [2021-12-06 19:32:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:32:46,539 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2021-12-06 19:32:46,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 19:32:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2021-12-06 19:32:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 19:32:46,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:32:46,542 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:32:46,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 19:32:46,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:32:46,744 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:32:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:32:46,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1967970000, now seen corresponding path program 1 times [2021-12-06 19:32:46,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:32:46,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998347536] [2021-12-06 19:32:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:32:46,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:32:46,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:32:46,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:32:46,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 19:32:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:32:47,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:32:47,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:32:49,345 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-06 19:32:49,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 127 treesize of output 35 [2021-12-06 19:32:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:32:49,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:32:53,173 INFO L354 Elim1Store]: treesize reduction 1502, result has 4.5 percent of original size [2021-12-06 19:32:53,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 129 treesize of output 107 [2021-12-06 19:32:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:32:54,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:32:54,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998347536] [2021-12-06 19:32:54,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998347536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:32:54,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:32:54,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-12-06 19:32:54,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795527483] [2021-12-06 19:32:54,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:32:54,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:32:54,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:32:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:32:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:32:54,048 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand has 20 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-06 19:33:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:08,903 INFO L93 Difference]: Finished difference Result 325 states and 486 transitions. [2021-12-06 19:33:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:33:08,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 68 [2021-12-06 19:33:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:08,905 INFO L225 Difference]: With dead ends: 325 [2021-12-06 19:33:08,906 INFO L226 Difference]: Without dead ends: 220 [2021-12-06 19:33:08,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-12-06 19:33:08,907 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 280 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:08,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1406 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1163 Invalid, 0 Unknown, 161 Unchecked, 13.0s Time] [2021-12-06 19:33:08,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-06 19:33:08,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 152. [2021-12-06 19:33:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 125 states have (on average 1.432) internal successors, (179), 127 states have internal predecessors, (179), 17 states have call successors, (17), 8 states have call predecessors, (17), 9 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2021-12-06 19:33:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 217 transitions. [2021-12-06 19:33:08,921 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 217 transitions. Word has length 68 [2021-12-06 19:33:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:08,922 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 217 transitions. [2021-12-06 19:33:08,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-06 19:33:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 217 transitions. [2021-12-06 19:33:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 19:33:08,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:08,923 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:08,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-06 19:33:09,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:33:09,125 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash -525780671, now seen corresponding path program 1 times [2021-12-06 19:33:09,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:33:09,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913377909] [2021-12-06 19:33:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:09,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:33:09,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:33:09,131 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:33:09,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 19:33:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:10,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 19:33:10,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:11,614 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-06 19:33:11,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 127 treesize of output 35 [2021-12-06 19:33:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:33:12,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:17,090 INFO L354 Elim1Store]: treesize reduction 1502, result has 4.5 percent of original size [2021-12-06 19:33:17,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 194 treesize of output 126 [2021-12-06 19:33:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 19:33:17,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:33:17,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913377909] [2021-12-06 19:33:17,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913377909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:33:17,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:33:17,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-12-06 19:33:17,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786020467] [2021-12-06 19:33:17,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:33:17,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 19:33:17,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:33:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 19:33:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:33:17,986 INFO L87 Difference]: Start difference. First operand 152 states and 217 transitions. Second operand has 22 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-06 19:33:25,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:33:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:29,387 INFO L93 Difference]: Finished difference Result 259 states and 375 transitions. [2021-12-06 19:33:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 19:33:29,391 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 69 [2021-12-06 19:33:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:29,393 INFO L225 Difference]: With dead ends: 259 [2021-12-06 19:33:29,393 INFO L226 Difference]: Without dead ends: 229 [2021-12-06 19:33:29,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=156, Invalid=899, Unknown=1, NotChecked=0, Total=1056 [2021-12-06 19:33:29,394 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 164 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:29,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1563 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 815 Invalid, 0 Unknown, 160 Unchecked, 7.2s Time] [2021-12-06 19:33:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-06 19:33:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 164. [2021-12-06 19:33:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 133 states have (on average 1.413533834586466) internal successors, (188), 136 states have internal predecessors, (188), 19 states have call successors, (19), 9 states have call predecessors, (19), 11 states have return successors, (25), 18 states have call predecessors, (25), 18 states have call successors, (25) [2021-12-06 19:33:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 232 transitions. [2021-12-06 19:33:29,405 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 232 transitions. Word has length 69 [2021-12-06 19:33:29,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:29,405 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 232 transitions. [2021-12-06 19:33:29,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 8 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-06 19:33:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 232 transitions. [2021-12-06 19:33:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 19:33:29,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:29,407 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:29,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-06 19:33:29,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:33:29,609 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:29,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1327314263, now seen corresponding path program 1 times [2021-12-06 19:33:29,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:33:29,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547919807] [2021-12-06 19:33:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:29,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:33:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:33:29,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:33:29,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bc2f32-3a92-421a-b558-a993d118fa19/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 19:33:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:30,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 19:33:30,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:31,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:33:31,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 35 [2021-12-06 19:33:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:33:31,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:32,915 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-06 19:33:32,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 129 treesize of output 1 [2021-12-06 19:33:41,564 WARN L227 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 19:33:41,566 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-12-06 19:33:41,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 129 treesize of output 772