./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:27:10,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:27:10,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:27:10,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:27:10,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:27:10,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:27:10,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:27:10,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:27:10,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:27:10,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:27:10,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:27:10,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:27:10,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:27:10,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:27:10,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:27:10,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:27:10,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:27:10,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:27:10,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:27:10,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:27:10,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:27:10,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:27:10,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:27:10,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:27:10,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:27:10,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:27:10,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:27:10,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:27:10,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:27:10,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:27:10,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:27:10,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:27:10,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:27:10,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:27:10,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:27:10,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:27:10,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:27:10,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:27:10,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:27:10,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:27:10,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:27:10,470 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:27:10,518 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:27:10,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:27:10,520 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:27:10,520 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:27:10,521 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:27:10,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:27:10,522 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:27:10,522 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:27:10,522 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:27:10,523 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:27:10,524 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:27:10,524 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:27:10,525 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:27:10,525 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:27:10,525 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:27:10,526 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:27:10,526 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:27:10,526 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:27:10,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:27:10,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:27:10,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:27:10,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:27:10,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:27:10,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:27:10,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:27:10,529 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:27:10,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:27:10,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:27:10,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:27:10,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:27:10,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:27:10,533 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:27:10,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:27:10,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:27:10,534 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:27:10,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:27:10,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:27:10,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:27:10,535 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_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2022-11-19 07:27:10,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:27:10,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:27:10,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:27:10,913 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:27:10,914 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:27:10,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2022-11-19 07:27:10,987 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/data/cd408ed1c/e697c855854144f08830348bc0902d01/FLAG748384439 [2022-11-19 07:27:11,910 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:27:11,911 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2022-11-19 07:27:11,952 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/data/cd408ed1c/e697c855854144f08830348bc0902d01/FLAG748384439 [2022-11-19 07:27:12,314 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/data/cd408ed1c/e697c855854144f08830348bc0902d01 [2022-11-19 07:27:12,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:27:12,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:27:12,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:27:12,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:27:12,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:27:12,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:27:12" (1/1) ... [2022-11-19 07:27:12,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9a95ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:12, skipping insertion in model container [2022-11-19 07:27:12,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:27:12" (1/1) ... [2022-11-19 07:27:12,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:27:12,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:27:12,824 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2022-11-19 07:27:12,833 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2022-11-19 07:27:14,009 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,014 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,015 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,016 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,017 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,034 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,037 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,039 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,040 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,464 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:27:14,465 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:27:14,467 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:27:14,469 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:27:14,470 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:27:14,472 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:27:14,473 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:27:14,477 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:27:14,478 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:27:14,479 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:27:14,675 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 07:27:14,685 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,686 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,779 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,779 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:14,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:27:14,949 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:27:14,976 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2022-11-19 07:27:14,984 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2022-11-19 07:27:15,039 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,039 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,040 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,040 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,041 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,049 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,050 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,051 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,051 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,088 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:27:15,089 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:27:15,090 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:27:15,091 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:27:15,092 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:27:15,093 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:27:15,094 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:27:15,094 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:27:15,095 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:27:15,095 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:27:15,117 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 07:27:15,124 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,124 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,174 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,175 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:27:15,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:27:15,518 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:27:15,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15 WrapperNode [2022-11-19 07:27:15,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:27:15,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:27:15,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:27:15,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:27:15,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,764 INFO L138 Inliner]: procedures = 692, calls = 2499, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1002 [2022-11-19 07:27:15,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:27:15,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:27:15,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:27:15,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:27:15,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,842 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:27:15,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:27:15,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:27:15,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:27:15,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (1/1) ... [2022-11-19 07:27:15,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:27:15,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:15,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:27:15,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:27:15,963 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-19 07:27:15,963 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-19 07:27:15,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:27:15,965 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-19 07:27:15,965 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-19 07:27:15,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:27:15,966 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-19 07:27:15,966 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-19 07:27:15,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:27:15,967 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:27:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:27:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:27:15,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:27:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:27:15,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:27:15,968 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-19 07:27:15,968 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-19 07:27:15,969 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-11-19 07:27:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-11-19 07:27:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-19 07:27:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-19 07:27:15,970 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:27:15,971 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:27:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:27:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-11-19 07:27:15,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-11-19 07:27:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:27:15,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:27:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-19 07:27:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-19 07:27:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-11-19 07:27:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-11-19 07:27:15,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:27:15,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:27:16,392 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:27:16,397 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:27:17,825 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:27:18,122 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:27:18,123 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-19 07:27:18,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:27:18 BoogieIcfgContainer [2022-11-19 07:27:18,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:27:18,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:27:18,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:27:18,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:27:18,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:27:12" (1/3) ... [2022-11-19 07:27:18,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42526026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:27:18, skipping insertion in model container [2022-11-19 07:27:18,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:15" (2/3) ... [2022-11-19 07:27:18,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42526026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:27:18, skipping insertion in model container [2022-11-19 07:27:18,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:27:18" (3/3) ... [2022-11-19 07:27:18,138 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2022-11-19 07:27:18,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:27:18,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:27:18,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:27:18,247 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70cd5038, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:27:18,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:27:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 72 states have internal predecessors, (95), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-19 07:27:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:27:18,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:18,263 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:18,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1580795549, now seen corresponding path program 1 times [2022-11-19 07:27:18,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:18,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520196621] [2022-11-19 07:27:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:27:19,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:19,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520196621] [2022-11-19 07:27:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520196621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:19,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:19,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:27:19,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531840530] [2022-11-19 07:27:19,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:19,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:27:19,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:27:19,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:27:19,526 INFO L87 Difference]: Start difference. First operand has 122 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 72 states have internal predecessors, (95), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-19 07:27:20,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:20,181 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2022-11-19 07:27:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:27:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 33 [2022-11-19 07:27:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:20,197 INFO L225 Difference]: With dead ends: 235 [2022-11-19 07:27:20,197 INFO L226 Difference]: Without dead ends: 124 [2022-11-19 07:27:20,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:27:20,212 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 5 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:20,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 709 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:27:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-19 07:27:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-11-19 07:27:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 73 states have internal predecessors, (87), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-19 07:27:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 162 transitions. [2022-11-19 07:27:20,276 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 162 transitions. Word has length 33 [2022-11-19 07:27:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:20,277 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 162 transitions. [2022-11-19 07:27:20,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-19 07:27:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 162 transitions. [2022-11-19 07:27:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 07:27:20,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:20,280 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:20,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:27:20,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1848825383, now seen corresponding path program 1 times [2022-11-19 07:27:20,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:20,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587768796] [2022-11-19 07:27:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:20,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:27:32,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:32,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587768796] [2022-11-19 07:27:32,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587768796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:32,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374884699] [2022-11-19 07:27:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:32,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:32,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:32,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:32,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:27:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 2437 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-19 07:27:33,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:34,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:27:34,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:27:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:41,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:27:41,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374884699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:41,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:27:41,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [14] total 29 [2022-11-19 07:27:41,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986395982] [2022-11-19 07:27:41,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:41,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:27:41,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:41,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:27:41,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:27:41,359 INFO L87 Difference]: Start difference. First operand 122 states and 162 transitions. Second operand has 20 states, 10 states have (on average 2.1) internal successors, (21), 14 states have internal predecessors, (21), 7 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-19 07:27:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:43,643 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2022-11-19 07:27:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:27:43,644 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 2.1) internal successors, (21), 14 states have internal predecessors, (21), 7 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36 [2022-11-19 07:27:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:43,646 INFO L225 Difference]: With dead ends: 148 [2022-11-19 07:27:43,647 INFO L226 Difference]: Without dead ends: 131 [2022-11-19 07:27:43,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:27:43,649 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 34 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:43,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1725 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 463 Invalid, 0 Unknown, 221 Unchecked, 2.0s Time] [2022-11-19 07:27:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-19 07:27:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-19 07:27:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-19 07:27:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 169 transitions. [2022-11-19 07:27:43,673 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 169 transitions. Word has length 36 [2022-11-19 07:27:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:43,674 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 169 transitions. [2022-11-19 07:27:43,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 2.1) internal successors, (21), 14 states have internal predecessors, (21), 7 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-19 07:27:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 169 transitions. [2022-11-19 07:27:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:27:43,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:43,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:43,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:43,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:43,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash -971205567, now seen corresponding path program 1 times [2022-11-19 07:27:43,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:43,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524516682] [2022-11-19 07:27:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:27:44,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:44,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524516682] [2022-11-19 07:27:44,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524516682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:44,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:44,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:27:44,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47988941] [2022-11-19 07:27:44,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:44,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:27:44,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:27:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:27:44,301 INFO L87 Difference]: Start difference. First operand 131 states and 169 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:27:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:44,701 INFO L93 Difference]: Finished difference Result 141 states and 178 transitions. [2022-11-19 07:27:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:27:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 38 [2022-11-19 07:27:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:44,703 INFO L225 Difference]: With dead ends: 141 [2022-11-19 07:27:44,703 INFO L226 Difference]: Without dead ends: 124 [2022-11-19 07:27:44,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:27:44,705 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 3 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:44,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 696 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:27:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-19 07:27:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-11-19 07:27:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 73 states have internal predecessors, (85), 36 states have call successors, (36), 13 states have call predecessors, (36), 13 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-19 07:27:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 156 transitions. [2022-11-19 07:27:44,719 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 156 transitions. Word has length 38 [2022-11-19 07:27:44,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:44,719 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 156 transitions. [2022-11-19 07:27:44,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:27:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 156 transitions. [2022-11-19 07:27:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:27:44,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:44,721 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:44,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:27:44,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:44,722 INFO L85 PathProgramCache]: Analyzing trace with hash -307444266, now seen corresponding path program 1 times [2022-11-19 07:27:44,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:44,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068118270] [2022-11-19 07:27:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:44,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:27:45,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:45,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068118270] [2022-11-19 07:27:45,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068118270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:45,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:45,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:27:45,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732772244] [2022-11-19 07:27:45,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:45,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:27:45,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:45,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:27:45,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:45,095 INFO L87 Difference]: Start difference. First operand 122 states and 156 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:27:45,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:45,520 INFO L93 Difference]: Finished difference Result 141 states and 177 transitions. [2022-11-19 07:27:45,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:27:45,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2022-11-19 07:27:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:45,522 INFO L225 Difference]: With dead ends: 141 [2022-11-19 07:27:45,522 INFO L226 Difference]: Without dead ends: 126 [2022-11-19 07:27:45,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:27:45,523 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 1 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:45,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 534 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:27:45,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-19 07:27:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-19 07:27:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 76 states have internal predecessors, (88), 36 states have call successors, (36), 13 states have call predecessors, (36), 14 states have return successors, (36), 36 states have call predecessors, (36), 35 states have call successors, (36) [2022-11-19 07:27:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2022-11-19 07:27:45,537 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 47 [2022-11-19 07:27:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:45,538 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2022-11-19 07:27:45,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:27:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2022-11-19 07:27:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 07:27:45,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:45,540 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:45,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:27:45,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:45,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2080313959, now seen corresponding path program 1 times [2022-11-19 07:27:45,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:45,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844345168] [2022-11-19 07:27:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:45,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:27:47,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:47,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844345168] [2022-11-19 07:27:47,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844345168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:47,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:47,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:27:47,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806123541] [2022-11-19 07:27:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:47,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:27:47,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:27:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:27:47,875 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-19 07:27:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:49,202 INFO L93 Difference]: Finished difference Result 239 states and 306 transitions. [2022-11-19 07:27:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:27:49,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 51 [2022-11-19 07:27:49,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:49,204 INFO L225 Difference]: With dead ends: 239 [2022-11-19 07:27:49,204 INFO L226 Difference]: Without dead ends: 126 [2022-11-19 07:27:49,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:27:49,206 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 60 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:49,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 567 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 07:27:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-19 07:27:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-19 07:27:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 75 states have (on average 1.16) internal successors, (87), 76 states have internal predecessors, (87), 36 states have call successors, (36), 13 states have call predecessors, (36), 14 states have return successors, (36), 36 states have call predecessors, (36), 35 states have call successors, (36) [2022-11-19 07:27:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 159 transitions. [2022-11-19 07:27:49,223 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 159 transitions. Word has length 51 [2022-11-19 07:27:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:49,223 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 159 transitions. [2022-11-19 07:27:49,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-19 07:27:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 159 transitions. [2022-11-19 07:27:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:27:49,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:49,226 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:49,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:27:49,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash -574299073, now seen corresponding path program 1 times [2022-11-19 07:27:49,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:49,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736379366] [2022-11-19 07:27:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:49,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:28:02,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:02,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736379366] [2022-11-19 07:28:02,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736379366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:02,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760848912] [2022-11-19 07:28:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:02,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:02,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:02,396 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:02,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:28:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 2560 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-19 07:28:03,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:03,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:28:03,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:28:06,110 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:28:06,120 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:28:06,133 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:28:06,139 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:28:08,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:28:08,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 62 [2022-11-19 07:28:08,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:28:08,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-19 07:28:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:28:09,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:09,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760848912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:09,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:09,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [17] total 28 [2022-11-19 07:28:09,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774116439] [2022-11-19 07:28:09,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:09,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:28:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:28:09,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:28:09,163 INFO L87 Difference]: Start difference. First operand 126 states and 159 transitions. Second operand has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-19 07:28:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:10,647 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2022-11-19 07:28:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:28:10,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) Word has length 55 [2022-11-19 07:28:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:10,651 INFO L225 Difference]: With dead ends: 139 [2022-11-19 07:28:10,651 INFO L226 Difference]: Without dead ends: 137 [2022-11-19 07:28:10,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:28:10,652 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 59 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:10,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 742 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 488 Invalid, 0 Unknown, 95 Unchecked, 1.2s Time] [2022-11-19 07:28:10,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-19 07:28:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-11-19 07:28:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 80 states have (on average 1.15) internal successors, (92), 81 states have internal predecessors, (92), 36 states have call successors, (36), 16 states have call predecessors, (36), 17 states have return successors, (36), 36 states have call predecessors, (36), 35 states have call successors, (36) [2022-11-19 07:28:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 164 transitions. [2022-11-19 07:28:10,683 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 164 transitions. Word has length 55 [2022-11-19 07:28:10,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:10,684 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 164 transitions. [2022-11-19 07:28:10,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-19 07:28:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 164 transitions. [2022-11-19 07:28:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 07:28:10,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:10,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:10,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:10,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:28:10,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:10,905 INFO L85 PathProgramCache]: Analyzing trace with hash 113466188, now seen corresponding path program 1 times [2022-11-19 07:28:10,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:10,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872947551] [2022-11-19 07:28:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:10,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:28:11,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:11,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872947551] [2022-11-19 07:28:11,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872947551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:11,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:28:11,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:28:11,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607692205] [2022-11-19 07:28:11,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:11,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:28:11,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:11,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:28:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:28:11,346 INFO L87 Difference]: Start difference. First operand 134 states and 164 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 07:28:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:11,911 INFO L93 Difference]: Finished difference Result 159 states and 193 transitions. [2022-11-19 07:28:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:28:11,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 57 [2022-11-19 07:28:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:11,913 INFO L225 Difference]: With dead ends: 159 [2022-11-19 07:28:11,913 INFO L226 Difference]: Without dead ends: 141 [2022-11-19 07:28:11,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:28:11,914 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 6 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:11,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 802 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:28:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-19 07:28:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2022-11-19 07:28:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 82 states have internal predecessors, (93), 36 states have call successors, (36), 16 states have call predecessors, (36), 17 states have return successors, (36), 36 states have call predecessors, (36), 35 states have call successors, (36) [2022-11-19 07:28:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 165 transitions. [2022-11-19 07:28:11,930 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 165 transitions. Word has length 57 [2022-11-19 07:28:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:11,931 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 165 transitions. [2022-11-19 07:28:11,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-19 07:28:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 165 transitions. [2022-11-19 07:28:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 07:28:11,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:11,932 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:11,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:28:11,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:11,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1144569758, now seen corresponding path program 1 times [2022-11-19 07:28:11,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:11,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52030195] [2022-11-19 07:28:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:11,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:28:15,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:15,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52030195] [2022-11-19 07:28:15,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52030195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:15,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:28:15,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-19 07:28:15,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088373147] [2022-11-19 07:28:15,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:15,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:28:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:28:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:28:15,318 INFO L87 Difference]: Start difference. First operand 135 states and 165 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 07:28:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:18,266 INFO L93 Difference]: Finished difference Result 210 states and 263 transitions. [2022-11-19 07:28:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:28:18,266 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 60 [2022-11-19 07:28:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:18,268 INFO L225 Difference]: With dead ends: 210 [2022-11-19 07:28:18,268 INFO L226 Difference]: Without dead ends: 193 [2022-11-19 07:28:18,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:28:18,269 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 215 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:18,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 481 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-19 07:28:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-19 07:28:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 133. [2022-11-19 07:28:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 80 states have (on average 1.1375) internal successors, (91), 81 states have internal predecessors, (91), 35 states have call successors, (35), 16 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-19 07:28:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 161 transitions. [2022-11-19 07:28:18,304 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 161 transitions. Word has length 60 [2022-11-19 07:28:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:18,307 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 161 transitions. [2022-11-19 07:28:18,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 07:28:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 161 transitions. [2022-11-19 07:28:18,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 07:28:18,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:18,311 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:18,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:28:18,311 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:18,312 INFO L85 PathProgramCache]: Analyzing trace with hash -397832089, now seen corresponding path program 1 times [2022-11-19 07:28:18,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:18,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32288046] [2022-11-19 07:28:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:18,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:28:31,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32288046] [2022-11-19 07:28:31,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32288046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282003525] [2022-11-19 07:28:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:31,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:31,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:31,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:31,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:28:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:32,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-19 07:28:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:32,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:28:43,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2022-11-19 07:28:43,240 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:28:43,251 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:28:43,828 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_349 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_349))) (exists ((v_ArrVal_348 Int)) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |c_aws_add_size_checked_#in~r#1.offset| v_ArrVal_348)) |c_#memory_$Pointer$.base|))) is different from true [2022-11-19 07:28:43,867 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:28:43,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-19 07:28:43,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:43,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-19 07:28:43,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-19 07:28:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:28:57,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:57,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282003525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:57,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:28:57,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [22] total 43 [2022-11-19 07:28:57,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415657431] [2022-11-19 07:28:57,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:57,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:28:57,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:57,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:28:57,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1583, Unknown=4, NotChecked=80, Total=1806 [2022-11-19 07:28:57,162 INFO L87 Difference]: Start difference. First operand 133 states and 161 transitions. Second operand has 26 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-19 07:28:59,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:59,507 INFO L93 Difference]: Finished difference Result 150 states and 176 transitions. [2022-11-19 07:28:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:28:59,508 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 61 [2022-11-19 07:28:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:59,510 INFO L225 Difference]: With dead ends: 150 [2022-11-19 07:28:59,510 INFO L226 Difference]: Without dead ends: 148 [2022-11-19 07:28:59,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=199, Invalid=2351, Unknown=4, NotChecked=98, Total=2652 [2022-11-19 07:28:59,512 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 70 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:59,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 709 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 671 Invalid, 0 Unknown, 267 Unchecked, 1.7s Time] [2022-11-19 07:28:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-19 07:28:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2022-11-19 07:28:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 86 states have internal predecessors, (96), 35 states have call successors, (35), 19 states have call predecessors, (35), 20 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-19 07:28:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 166 transitions. [2022-11-19 07:28:59,539 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 166 transitions. Word has length 61 [2022-11-19 07:28:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:59,540 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 166 transitions. [2022-11-19 07:28:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-19 07:28:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 166 transitions. [2022-11-19 07:28:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 07:28:59,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:59,542 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:59,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 07:28:59,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 07:28:59,753 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:59,754 INFO L85 PathProgramCache]: Analyzing trace with hash 351073868, now seen corresponding path program 1 times [2022-11-19 07:28:59,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:59,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109556426] [2022-11-19 07:28:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:59,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:29:00,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:00,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109556426] [2022-11-19 07:29:00,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109556426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:00,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:00,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:29:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909375284] [2022-11-19 07:29:00,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:00,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:29:00,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:00,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:29:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:29:00,144 INFO L87 Difference]: Start difference. First operand 141 states and 166 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-19 07:29:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:01,055 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2022-11-19 07:29:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:29:01,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 62 [2022-11-19 07:29:01,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:01,057 INFO L225 Difference]: With dead ends: 168 [2022-11-19 07:29:01,057 INFO L226 Difference]: Without dead ends: 150 [2022-11-19 07:29:01,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:29:01,058 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 6 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:01,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 780 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:29:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-19 07:29:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 141. [2022-11-19 07:29:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 86 states have internal predecessors, (96), 35 states have call successors, (35), 19 states have call predecessors, (35), 20 states have return successors, (35), 35 states have call predecessors, (35), 34 states have call successors, (35) [2022-11-19 07:29:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 166 transitions. [2022-11-19 07:29:01,085 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 166 transitions. Word has length 62 [2022-11-19 07:29:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:01,086 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 166 transitions. [2022-11-19 07:29:01,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-19 07:29:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 166 transitions. [2022-11-19 07:29:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:29:01,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:01,087 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:01,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:29:01,088 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1934274345, now seen corresponding path program 1 times [2022-11-19 07:29:01,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:01,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189747383] [2022-11-19 07:29:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:01,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:29:09,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189747383] [2022-11-19 07:29:09,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189747383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672704052] [2022-11-19 07:29:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:09,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:09,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:09,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:09,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3ac5f8f-96cd-4d61-a684-a1fb6eb32d4e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:29:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:10,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-19 07:29:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:10,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:29:10,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:29:17,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:17,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 62 [2022-11-19 07:29:17,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:29:17,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-19 07:29:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:29:17,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:20,831 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-19 07:37:33,693 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.