./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW --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 b1e17fda858e874821809b4efef78fd91cf6fdf1723d3ff0faf91ee901e13b86 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:35:12,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:35:12,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:35:12,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:35:12,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:35:12,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:35:12,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:35:12,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:35:12,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:35:13,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:35:13,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:35:13,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:35:13,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:35:13,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:35:13,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:35:13,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:35:13,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:35:13,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:35:13,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:35:13,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:35:13,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:35:13,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:35:13,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:35:13,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:35:13,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:35:13,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:35:13,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:35:13,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:35:13,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:35:13,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:35:13,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:35:13,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:35:13,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:35:13,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:35:13,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:35:13,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:35:13,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:35:13,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:35:13,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:35:13,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:35:13,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:35:13,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:35:13,111 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:35:13,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:35:13,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:35:13,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:35:13,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:35:13,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:35:13,114 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:35:13,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:35:13,115 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:35:13,115 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:35:13,116 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:35:13,117 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:35:13,117 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:35:13,117 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:35:13,118 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:35:13,118 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:35:13,118 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:35:13,118 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:35:13,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:35:13,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:35:13,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:35:13,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:35:13,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:35:13,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:35:13,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:35:13,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:35:13,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:35:13,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:35:13,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:35:13,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:35:13,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:35:13,123 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:35:13,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:35:13,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:35:13,124 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:35:13,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:35:13,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:35:13,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:35:13,125 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_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e17fda858e874821809b4efef78fd91cf6fdf1723d3ff0faf91ee901e13b86 [2022-11-23 14:35:13,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:35:13,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:35:13,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:35:13,437 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:35:13,438 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:35:13,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i [2022-11-23 14:35:16,551 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:35:17,285 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:35:17,285 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i [2022-11-23 14:35:17,338 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/data/7fbd16d3c/d21ff56f009747e3b47a3ab0bc223917/FLAG91e47312c [2022-11-23 14:35:17,358 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/data/7fbd16d3c/d21ff56f009747e3b47a3ab0bc223917 [2022-11-23 14:35:17,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:35:17,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:35:17,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:35:17,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:35:17,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:35:17,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:17" (1/1) ... [2022-11-23 14:35:17,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3c0829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:17, skipping insertion in model container [2022-11-23 14:35:17,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:17" (1/1) ... [2022-11-23 14:35:17,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:35:17,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:35:17,777 WARN L237 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_4e6fc113-1b8c-45d2-859b-aea22fe98f82/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4501,4514] [2022-11-23 14:35:17,785 WARN L237 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_4e6fc113-1b8c-45d2-859b-aea22fe98f82/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4561,4574] [2022-11-23 14:35:18,863 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:18,867 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:18,867 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:18,869 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:18,872 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:18,892 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:18,893 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:18,895 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:18,896 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:19,344 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-23 14:35:19,345 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-23 14:35:19,346 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-23 14:35:19,348 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-23 14:35:19,349 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-23 14:35:19,350 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-23 14:35:19,351 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-23 14:35:19,352 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-23 14:35:19,352 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-23 14:35:19,353 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-23 14:35:19,652 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-23 14:35:19,678 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:19,685 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:19,824 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:19,829 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:19,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:35:20,013 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:35:20,037 WARN L237 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_4e6fc113-1b8c-45d2-859b-aea22fe98f82/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4501,4514] [2022-11-23 14:35:20,052 WARN L237 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_4e6fc113-1b8c-45d2-859b-aea22fe98f82/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4561,4574] [2022-11-23 14:35:20,093 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,093 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,095 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,096 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,096 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,107 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,107 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,108 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,112 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,162 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-23 14:35:20,163 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-23 14:35:20,163 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-23 14:35:20,164 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-23 14:35:20,165 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-23 14:35:20,166 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-23 14:35:20,166 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-23 14:35:20,167 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-23 14:35:20,167 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-23 14:35:20,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-23 14:35:20,204 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-23 14:35:20,223 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,223 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,287 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,287 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:35:20,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:35:20,613 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:35:20,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20 WrapperNode [2022-11-23 14:35:20,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:35:20,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:35:20,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:35:20,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:35:20,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,845 INFO L138 Inliner]: procedures = 691, calls = 2636, calls flagged for inlining = 61, calls inlined = 11, statements flattened = 1064 [2022-11-23 14:35:20,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:35:20,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:35:20,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:35:20,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:35:20,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,949 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:35:20,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:35:20,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:35:20,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:35:20,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (1/1) ... [2022-11-23 14:35:20,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:35:20,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:21,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:35:21,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:35:21,048 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-23 14:35:21,049 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-23 14:35:21,049 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-23 14:35:21,049 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-23 14:35:21,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:35:21,049 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-23 14:35:21,050 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-23 14:35:21,050 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-11-23 14:35:21,050 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-11-23 14:35:21,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:35:21,050 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-23 14:35:21,051 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-23 14:35:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:35:21,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:35:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:35:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:35:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:35:21,052 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2022-11-23 14:35:21,052 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2022-11-23 14:35:21,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:35:21,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:35:21,052 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-23 14:35:21,052 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-23 14:35:21,053 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-11-23 14:35:21,053 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-11-23 14:35:21,053 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-23 14:35:21,053 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-23 14:35:21,053 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 14:35:21,053 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 14:35:21,053 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2022-11-23 14:35:21,054 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2022-11-23 14:35:21,054 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2022-11-23 14:35:21,054 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2022-11-23 14:35:21,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:35:21,054 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-11-23 14:35:21,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-11-23 14:35:21,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:35:21,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:35:21,055 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-23 14:35:21,055 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-23 14:35:21,055 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-11-23 14:35:21,055 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-11-23 14:35:21,056 INFO L130 BoogieDeclarations]: Found specification of procedure assert_bytes_match [2022-11-23 14:35:21,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_bytes_match [2022-11-23 14:35:21,056 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-23 14:35:21,056 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-23 14:35:21,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:35:21,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:35:21,445 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:35:21,448 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:35:23,181 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:35:23,508 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:35:23,508 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:35:23,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:23 BoogieIcfgContainer [2022-11-23 14:35:23,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:35:23,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:35:23,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:35:23,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:35:23,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:35:17" (1/3) ... [2022-11-23 14:35:23,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0dad38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:23, skipping insertion in model container [2022-11-23 14:35:23,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:20" (2/3) ... [2022-11-23 14:35:23,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0dad38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:23, skipping insertion in model container [2022-11-23 14:35:23,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:23" (3/3) ... [2022-11-23 14:35:23,529 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_append_dynamic_harness.i [2022-11-23 14:35:23,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:35:23,549 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:35:23,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:35:23,631 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;@5c9db1b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:35:23,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:35:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 194 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 103 states have internal predecessors, (123), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-23 14:35:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 14:35:23,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:23,654 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:23,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:23,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:23,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1899896275, now seen corresponding path program 1 times [2022-11-23 14:35:23,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:23,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697680204] [2022-11-23 14:35:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:23,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:35:24,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:24,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697680204] [2022-11-23 14:35:24,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697680204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:24,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:24,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:35:24,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205856640] [2022-11-23 14:35:24,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:24,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:35:24,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:35:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:35:24,584 INFO L87 Difference]: Start difference. First operand has 194 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 103 states have internal predecessors, (123), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:35:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:24,834 INFO L93 Difference]: Finished difference Result 363 states and 514 transitions. [2022-11-23 14:35:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:35:24,836 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 55 [2022-11-23 14:35:24,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:24,855 INFO L225 Difference]: With dead ends: 363 [2022-11-23 14:35:24,856 INFO L226 Difference]: Without dead ends: 192 [2022-11-23 14:35:24,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:35:24,877 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:24,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 242 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:35:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-23 14:35:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-11-23 14:35:24,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 102 states have internal predecessors, (119), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-23 14:35:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 262 transitions. [2022-11-23 14:35:24,998 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 262 transitions. Word has length 55 [2022-11-23 14:35:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:25,002 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 262 transitions. [2022-11-23 14:35:25,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:35:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 262 transitions. [2022-11-23 14:35:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-23 14:35:25,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:25,010 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:25,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:35:25,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:25,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash 974803453, now seen corresponding path program 1 times [2022-11-23 14:35:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:25,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370118309] [2022-11-23 14:35:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:25,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:35:32,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:32,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370118309] [2022-11-23 14:35:32,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370118309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:32,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:32,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 14:35:32,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259423492] [2022-11-23 14:35:32,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:35:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:32,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:35:32,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:35:32,982 INFO L87 Difference]: Start difference. First operand 192 states and 262 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 7 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-23 14:35:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:34,945 INFO L93 Difference]: Finished difference Result 398 states and 545 transitions. [2022-11-23 14:35:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:35:34,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 7 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 57 [2022-11-23 14:35:34,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:34,948 INFO L225 Difference]: With dead ends: 398 [2022-11-23 14:35:34,949 INFO L226 Difference]: Without dead ends: 235 [2022-11-23 14:35:34,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:35:34,950 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 143 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:34,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1133 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 14:35:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-23 14:35:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 214. [2022-11-23 14:35:34,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 113 states have internal predecessors, (131), 83 states have call successors, (83), 18 states have call predecessors, (83), 18 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-23 14:35:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 296 transitions. [2022-11-23 14:35:34,984 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 296 transitions. Word has length 57 [2022-11-23 14:35:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:34,985 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 296 transitions. [2022-11-23 14:35:34,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 7 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-23 14:35:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 296 transitions. [2022-11-23 14:35:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-23 14:35:34,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:34,987 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:34,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:35:34,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:34,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:34,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1771125939, now seen corresponding path program 1 times [2022-11-23 14:35:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:34,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774275598] [2022-11-23 14:35:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:34,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:35:35,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:35,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774275598] [2022-11-23 14:35:35,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774275598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:35,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:35,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:35:35,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739626885] [2022-11-23 14:35:35,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:35,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:35:35,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:35,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:35:35,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:35,449 INFO L87 Difference]: Start difference. First operand 214 states and 296 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-23 14:35:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:36,017 INFO L93 Difference]: Finished difference Result 269 states and 366 transitions. [2022-11-23 14:35:36,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:35:36,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 59 [2022-11-23 14:35:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:36,025 INFO L225 Difference]: With dead ends: 269 [2022-11-23 14:35:36,029 INFO L226 Difference]: Without dead ends: 231 [2022-11-23 14:35:36,032 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 [2022-11-23 14:35:36,034 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 8 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:36,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1212 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:35:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-23 14:35:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 216. [2022-11-23 14:35:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 83 states have call successors, (83), 18 states have call predecessors, (83), 18 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-23 14:35:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 298 transitions. [2022-11-23 14:35:36,079 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 298 transitions. Word has length 59 [2022-11-23 14:35:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:36,081 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 298 transitions. [2022-11-23 14:35:36,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-23 14:35:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 298 transitions. [2022-11-23 14:35:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 14:35:36,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:36,089 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:36,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:35:36,089 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:36,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:36,090 INFO L85 PathProgramCache]: Analyzing trace with hash 360017072, now seen corresponding path program 1 times [2022-11-23 14:35:36,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:36,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713443253] [2022-11-23 14:35:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:36,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:35:41,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:41,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713443253] [2022-11-23 14:35:41,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713443253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:41,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:41,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-23 14:35:41,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395182308] [2022-11-23 14:35:41,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:41,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 14:35:41,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:41,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 14:35:41,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:35:41,275 INFO L87 Difference]: Start difference. First operand 216 states and 298 transitions. Second operand has 14 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-23 14:35:45,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:45,017 INFO L93 Difference]: Finished difference Result 315 states and 447 transitions. [2022-11-23 14:35:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:35:45,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 61 [2022-11-23 14:35:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:45,025 INFO L225 Difference]: With dead ends: 315 [2022-11-23 14:35:45,025 INFO L226 Difference]: Without dead ends: 313 [2022-11-23 14:35:45,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:35:45,027 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 205 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:45,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1165 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 14:35:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-23 14:35:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 234. [2022-11-23 14:35:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 125 states have (on average 1.16) internal successors, (145), 127 states have internal predecessors, (145), 88 states have call successors, (88), 20 states have call predecessors, (88), 20 states have return successors, (87), 86 states have call predecessors, (87), 87 states have call successors, (87) [2022-11-23 14:35:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 320 transitions. [2022-11-23 14:35:45,071 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 320 transitions. Word has length 61 [2022-11-23 14:35:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:45,072 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 320 transitions. [2022-11-23 14:35:45,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-23 14:35:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 320 transitions. [2022-11-23 14:35:45,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 14:35:45,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:45,074 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:45,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:35:45,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:45,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:45,075 INFO L85 PathProgramCache]: Analyzing trace with hash 249299340, now seen corresponding path program 1 times [2022-11-23 14:35:45,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:45,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324551829] [2022-11-23 14:35:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:45,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:35:51,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324551829] [2022-11-23 14:35:51,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324551829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:51,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:51,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-23 14:35:51,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129901945] [2022-11-23 14:35:51,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:51,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 14:35:51,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 14:35:51,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:35:51,844 INFO L87 Difference]: Start difference. First operand 234 states and 320 transitions. Second operand has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-23 14:35:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:54,117 INFO L93 Difference]: Finished difference Result 469 states and 644 transitions. [2022-11-23 14:35:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:35:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 61 [2022-11-23 14:35:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:54,120 INFO L225 Difference]: With dead ends: 469 [2022-11-23 14:35:54,121 INFO L226 Difference]: Without dead ends: 308 [2022-11-23 14:35:54,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:35:54,123 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 176 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:54,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1621 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 14:35:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-23 14:35:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 250. [2022-11-23 14:35:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 135 states have (on average 1.1555555555555554) internal successors, (156), 137 states have internal predecessors, (156), 94 states have call successors, (94), 20 states have call predecessors, (94), 20 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-23 14:35:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 343 transitions. [2022-11-23 14:35:54,188 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 343 transitions. Word has length 61 [2022-11-23 14:35:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:54,189 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 343 transitions. [2022-11-23 14:35:54,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-23 14:35:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 343 transitions. [2022-11-23 14:35:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 14:35:54,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:54,191 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 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] [2022-11-23 14:35:54,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:35:54,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1682617456, now seen corresponding path program 1 times [2022-11-23 14:35:54,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:54,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515047608] [2022-11-23 14:35:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:54,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 14:36:09,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515047608] [2022-11-23 14:36:09,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515047608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:36:09,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321505181] [2022-11-23 14:36:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:09,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:09,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:36:09,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:36:09,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e6fc113-1b8c-45d2-859b-aea22fe98f82/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:36:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:10,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 2590 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-23 14:36:10,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:10,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-23 14:36:11,605 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:11,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-23 14:36:11,712 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 [2022-11-23 14:36:11,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-11-23 14:36:13,931 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-23 14:36:13,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-23 14:36:26,374 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 27 treesize of output 27 [2022-11-23 14:36:26,390 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 6 treesize of output 5 [2022-11-23 14:36:55,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:55,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:36:55,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 289 [2022-11-23 14:37:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:20,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2022-11-23 14:37:20,607 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 28 treesize of output 23 [2022-11-23 14:37:23,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:37:23,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 125 treesize of output 109 [2022-11-23 14:37:23,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:37:23,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2022-11-23 14:37:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:37:24,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:37:27,404 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-23 14:45:11,133 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.