./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur --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 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd --- 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-38b53e6 [2022-11-25 22:41:20,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:41:20,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:41:20,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:41:20,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:41:20,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:41:20,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:41:20,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:41:20,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:41:20,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:41:20,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:41:20,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:41:20,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:41:20,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:41:20,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:41:20,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:41:20,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:41:20,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:41:20,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:41:20,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:41:20,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:41:20,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:41:20,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:41:20,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:41:20,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:41:20,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:41:20,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:41:20,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:41:20,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:41:20,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:41:20,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:41:20,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:41:20,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:41:20,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:41:20,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:41:20,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:41:20,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:41:20,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:41:20,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:41:20,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:41:20,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:41:20,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-25 22:41:20,325 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:41:20,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:41:20,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:41:20,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:41:20,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:41:20,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:41:20,329 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:41:20,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:41:20,329 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:41:20,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:41:20,331 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:41:20,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:41:20,332 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:41:20,332 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:41:20,332 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:41:20,333 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:41:20,333 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:41:20,333 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:41:20,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:41:20,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:41:20,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:41:20,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:41:20,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:41:20,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:41:20,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:41:20,336 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:41:20,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:41:20,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:41:20,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:41:20,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:41:20,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:41:20,339 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:41:20,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:41:20,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:41:20,340 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:41:20,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:41:20,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:41:20,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:41:20,341 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_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd [2022-11-25 22:41:20,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:41:20,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:41:20,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:41:20,744 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:41:20,745 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:41:20,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2022-11-25 22:41:24,092 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:41:24,675 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:41:24,676 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2022-11-25 22:41:24,723 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/data/37d1e5213/366db046535b41d490a8ddfcc4d2b9ba/FLAGec782abe5 [2022-11-25 22:41:24,741 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/data/37d1e5213/366db046535b41d490a8ddfcc4d2b9ba [2022-11-25 22:41:24,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:41:24,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:41:24,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:41:24,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:41:24,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:41:24,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:41:24" (1/1) ... [2022-11-25 22:41:24,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74365248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:24, skipping insertion in model container [2022-11-25 22:41:24,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:41:24" (1/1) ... [2022-11-25 22:41:24,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:41:24,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:41:25,228 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_a80c0398-a18f-4222-a343-3795cd6f20a4/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2022-11-25 22:41:25,241 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_a80c0398-a18f-4222-a343-3795cd6f20a4/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2022-11-25 22:41:26,760 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:26,796 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:26,806 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:26,815 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:26,815 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:26,817 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:26,818 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:26,822 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:26,838 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:26,839 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:26,842 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:26,843 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:26,967 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:41:26,969 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:41:26,971 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:41:26,992 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 22:41:26,995 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 22:41:26,995 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 22:41:27,198 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:27,376 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 22:41:27,378 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 22:41:27,379 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 22:41:27,381 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 22:41:27,383 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 22:41:27,385 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 22:41:27,386 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 22:41:27,387 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 22:41:27,388 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 22:41:27,389 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 22:41:27,390 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 22:41:27,580 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 22:41:27,619 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:27,621 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:27,633 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:27,637 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:27,639 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:27,641 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 22:41:27,666 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:41:27,734 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:41:27,757 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:27,762 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:27,788 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:27,842 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:27,872 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 22:41:27,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:41:27,961 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:41:27,993 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_a80c0398-a18f-4222-a343-3795cd6f20a4/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2022-11-25 22:41:27,994 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_a80c0398-a18f-4222-a343-3795cd6f20a4/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2022-11-25 22:41:28,038 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,049 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,055 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,056 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,056 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,057 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,058 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,061 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,070 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,071 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,072 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,073 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,085 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:41:28,086 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:41:28,088 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:41:28,101 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 22:41:28,104 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 22:41:28,105 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 22:41:28,109 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,151 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 22:41:28,151 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 22:41:28,152 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 22:41:28,154 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 22:41:28,155 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 22:41:28,156 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 22:41:28,158 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 22:41:28,158 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 22:41:28,159 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 22:41:28,159 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 22:41:28,166 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 22:41:28,207 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 22:41:28,240 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,242 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,249 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,254 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,257 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,258 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 22:41:28,268 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:41:28,289 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:41:28,302 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,303 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:41:28,314 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,321 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 22:41:28,389 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 22:41:28,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:41:28,728 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:41:28,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28 WrapperNode [2022-11-25 22:41:28,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:41:28,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:41:28,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:41:28,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:41:28,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:28,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:28,922 INFO L138 Inliner]: procedures = 691, calls = 2630, calls flagged for inlining = 59, calls inlined = 7, statements flattened = 815 [2022-11-25 22:41:28,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:41:28,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:41:28,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:41:28,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:41:28,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:28,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:28,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:28,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:28,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:28,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:28,990 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:28,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:29,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:41:29,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:41:29,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:41:29,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:41:29,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (1/1) ... [2022-11-25 22:41:29,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:41:29,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:41:29,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:41:29,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:41:29,135 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-25 22:41:29,135 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-25 22:41:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:41:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-25 22:41:29,137 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-25 22:41:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:41:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 22:41:29,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 22:41:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2022-11-25 22:41:29,138 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2022-11-25 22:41:29,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 22:41:29,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:41:29,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 22:41:29,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:41:29,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:41:29,139 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-25 22:41:29,139 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-25 22:41:29,140 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 22:41:29,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 22:41:29,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:41:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 22:41:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 22:41:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-25 22:41:29,143 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-25 22:41:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2022-11-25 22:41:29,143 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2022-11-25 22:41:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-25 22:41:29,144 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-25 22:41:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:41:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-11-25 22:41:29,144 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-11-25 22:41:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-11-25 22:41:29,144 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-11-25 22:41:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:41:29,579 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:41:29,581 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:41:31,167 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:41:31,598 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:41:31,599 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 22:41:31,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:41:31 BoogieIcfgContainer [2022-11-25 22:41:31,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:41:31,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:41:31,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:41:31,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:41:31,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:41:24" (1/3) ... [2022-11-25 22:41:31,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1593ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:41:31, skipping insertion in model container [2022-11-25 22:41:31,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:41:28" (2/3) ... [2022-11-25 22:41:31,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1593ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:41:31, skipping insertion in model container [2022-11-25 22:41:31,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:41:31" (3/3) ... [2022-11-25 22:41:31,613 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reset_harness.i [2022-11-25 22:41:31,635 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:41:31,635 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:41:31,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:41:31,733 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;@19d3358c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:41:31,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:41:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-25 22:41:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 22:41:31,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:31,750 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:31,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:31,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2135767528, now seen corresponding path program 1 times [2022-11-25 22:41:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:31,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979335621] [2022-11-25 22:41:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:41:34,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:34,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979335621] [2022-11-25 22:41:34,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979335621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:34,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:34,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:41:34,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291333870] [2022-11-25 22:41:34,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:34,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:41:34,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:34,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:41:34,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:41:34,704 INFO L87 Difference]: Start difference. First operand has 81 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:41:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:36,031 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2022-11-25 22:41:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:41:36,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 31 [2022-11-25 22:41:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:36,051 INFO L225 Difference]: With dead ends: 121 [2022-11-25 22:41:36,051 INFO L226 Difference]: Without dead ends: 79 [2022-11-25 22:41:36,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:41:36,066 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 14 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:36,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 354 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:41:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-25 22:41:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-25 22:41:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 22:41:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-11-25 22:41:36,144 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 31 [2022-11-25 22:41:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:36,146 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-11-25 22:41:36,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 22:41:36,147 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-11-25 22:41:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:41:36,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:36,150 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] [2022-11-25 22:41:36,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:41:36,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2101338410, now seen corresponding path program 1 times [2022-11-25 22:41:36,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:36,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055185178] [2022-11-25 22:41:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:36,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:41:39,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:39,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055185178] [2022-11-25 22:41:39,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055185178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:39,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:39,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 22:41:39,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438952669] [2022-11-25 22:41:39,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:39,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:41:39,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:41:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:41:39,726 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 22:41:41,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:41,634 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2022-11-25 22:41:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:41:41,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-11-25 22:41:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:41,637 INFO L225 Difference]: With dead ends: 96 [2022-11-25 22:41:41,637 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 22:41:41,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:41:41,639 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:41,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 110 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-25 22:41:41,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 22:41:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-11-25 22:41:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-25 22:41:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-11-25 22:41:41,673 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 37 [2022-11-25 22:41:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:41,673 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-11-25 22:41:41,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 22:41:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-11-25 22:41:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 22:41:41,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:41,680 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:41,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:41:41,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash 257990555, now seen corresponding path program 1 times [2022-11-25 22:41:41,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:41,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287427850] [2022-11-25 22:41:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:41,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 22:41:50,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287427850] [2022-11-25 22:41:50,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287427850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:50,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:50,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 22:41:50,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466370068] [2022-11-25 22:41:50,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:50,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:41:50,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:50,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:41:50,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:41:50,681 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-25 22:41:52,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:52,894 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2022-11-25 22:41:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 22:41:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 44 [2022-11-25 22:41:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:52,897 INFO L225 Difference]: With dead ends: 98 [2022-11-25 22:41:52,898 INFO L226 Difference]: Without dead ends: 96 [2022-11-25 22:41:52,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:41:52,899 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 38 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:52,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 582 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 22:41:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-25 22:41:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-11-25 22:41:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 27 states have call successors, (27), 14 states have call predecessors, (27), 13 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-25 22:41:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2022-11-25 22:41:52,931 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 44 [2022-11-25 22:41:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:52,931 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2022-11-25 22:41:52,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-25 22:41:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2022-11-25 22:41:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 22:41:52,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:52,933 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-25 22:41:52,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:41:52,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:52,934 INFO L85 PathProgramCache]: Analyzing trace with hash -418782654, now seen corresponding path program 1 times [2022-11-25 22:41:52,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:52,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456733242] [2022-11-25 22:41:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:52,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 22:41:55,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:55,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456733242] [2022-11-25 22:41:55,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456733242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:55,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:55,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:41:55,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999071541] [2022-11-25 22:41:55,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:55,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:41:55,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:55,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:41:55,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:41:55,424 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 22:41:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:41:56,865 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2022-11-25 22:41:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:41:56,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2022-11-25 22:41:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:41:56,868 INFO L225 Difference]: With dead ends: 107 [2022-11-25 22:41:56,869 INFO L226 Difference]: Without dead ends: 105 [2022-11-25 22:41:56,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:41:56,870 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 28 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:41:56,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 420 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 22:41:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-25 22:41:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-11-25 22:41:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.105263157894737) internal successors, (63), 60 states have internal predecessors, (63), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-25 22:41:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-11-25 22:41:56,890 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 43 [2022-11-25 22:41:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:41:56,890 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-11-25 22:41:56,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 22:41:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-11-25 22:41:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 22:41:56,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:41:56,892 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:41:56,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:41:56,893 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:41:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:41:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash -463655508, now seen corresponding path program 1 times [2022-11-25 22:41:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:41:56,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499123946] [2022-11-25 22:41:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:41:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:41:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:41:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 22:41:59,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:41:59,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499123946] [2022-11-25 22:41:59,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499123946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:41:59,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:41:59,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:41:59,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504178945] [2022-11-25 22:41:59,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:41:59,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:41:59,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:41:59,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:41:59,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:41:59,007 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:42:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:42:00,524 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2022-11-25 22:42:00,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:42:00,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 49 [2022-11-25 22:42:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:42:00,527 INFO L225 Difference]: With dead ends: 111 [2022-11-25 22:42:00,527 INFO L226 Difference]: Without dead ends: 109 [2022-11-25 22:42:00,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:42:00,528 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 28 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:42:00,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 419 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 22:42:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-25 22:42:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2022-11-25 22:42:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 61 states have (on average 1.098360655737705) internal successors, (67), 64 states have internal predecessors, (67), 29 states have call successors, (29), 16 states have call predecessors, (29), 15 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-25 22:42:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2022-11-25 22:42:00,563 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 49 [2022-11-25 22:42:00,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:42:00,564 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2022-11-25 22:42:00,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:42:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2022-11-25 22:42:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 22:42:00,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:42:00,573 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:42:00,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:42:00,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:42:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:42:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1351434591, now seen corresponding path program 1 times [2022-11-25 22:42:00,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:42:00,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849298719] [2022-11-25 22:42:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:42:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:42:07,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:42:07,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849298719] [2022-11-25 22:42:07,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849298719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:42:07,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982703507] [2022-11-25 22:42:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:42:07,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:42:07,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:42:07,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:42:07,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a80c0398-a18f-4222-a343-3795cd6f20a4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:42:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:42:07,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-25 22:42:07,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:42:08,031 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 [2022-11-25 22:42:08,038 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 [2022-11-25 22:42:11,096 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:42:11,105 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 22:42:11,707 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 8 treesize of output 4 [2022-11-25 22:42:11,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:42:11,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:42:11,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 38 treesize of output 16 [2022-11-25 22:42:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:42:12,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:42:16,188 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-25 22:51:39,806 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.