./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 2329fc70 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_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/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_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh --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-2329fc7 [2022-12-14 07:57:55,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:57:55,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:57:55,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:57:55,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:57:55,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:57:55,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:57:55,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:57:55,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:57:55,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:57:55,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:57:55,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:57:55,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:57:55,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:57:55,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:57:55,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:57:55,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:57:55,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:57:55,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:57:55,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:57:55,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:57:55,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:57:55,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:57:55,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:57:55,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:57:55,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:57:55,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:57:55,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:57:55,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:57:55,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:57:55,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:57:55,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:57:55,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:57:55,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:57:55,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:57:55,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:57:55,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:57:55,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:57:55,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:57:55,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:57:55,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:57:55,201 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 07:57:55,221 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:57:55,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:57:55,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:57:55,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:57:55,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:57:55,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:57:55,223 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:57:55,223 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:57:55,223 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:57:55,223 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:57:55,224 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:57:55,224 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:57:55,224 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:57:55,224 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:57:55,224 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:57:55,224 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:57:55,225 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:57:55,225 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:57:55,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:57:55,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:57:55,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:57:55,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:57:55,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:57:55,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:57:55,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:57:55,226 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:57:55,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:57:55,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:57:55,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:57:55,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:57:55,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:57:55,227 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:57:55,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:57:55,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:57:55,227 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:57:55,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:57:55,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:57:55,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:57:55,228 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_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd [2022-12-14 07:57:55,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:57:55,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:57:55,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:57:55,444 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:57:55,444 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:57:55,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2022-12-14 07:57:57,940 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:57:58,325 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:57:58,326 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2022-12-14 07:57:58,347 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/data/f85bb0071/b8fc51bdf9a5402bb9c530a564e12cfe/FLAG09f360a3f [2022-12-14 07:57:58,509 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/data/f85bb0071/b8fc51bdf9a5402bb9c530a564e12cfe [2022-12-14 07:57:58,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:57:58,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:57:58,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:57:58,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:57:58,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:57:58,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:57:58" (1/1) ... [2022-12-14 07:57:58,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6090062d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:57:58, skipping insertion in model container [2022-12-14 07:57:58,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:57:58" (1/1) ... [2022-12-14 07:57:58,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:57:58,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:57:58,810 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_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2022-12-14 07:57:58,818 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_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2022-12-14 07:57:59,531 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:57:59,546 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:57:59,554 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:57:59,555 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:57:59,555 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:57:59,556 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:57:59,558 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:57:59,563 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:57:59,573 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:57:59,573 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:57:59,575 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:57:59,576 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:57:59,645 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:57:59,645 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:57:59,646 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:57:59,651 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 07:57:59,654 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 07:57:59,654 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 07:57:59,779 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:57:59,900 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 07:57:59,901 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 07:57:59,902 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 07:57:59,903 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 07:57:59,904 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 07:57:59,906 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 07:57:59,906 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 07:57:59,907 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 07:57:59,908 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 07:57:59,909 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 07:57:59,909 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 07:58:00,043 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 07:58:00,069 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,070 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,077 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,079 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,080 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,081 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-14 07:58:00,089 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 07:58:00,112 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 07:58:00,119 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,119 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,129 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,152 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,172 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:58:00,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:58:00,218 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:58:00,231 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_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2022-12-14 07:58:00,231 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_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2022-12-14 07:58:00,257 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,261 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,263 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,264 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,264 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,265 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,265 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,267 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,270 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,271 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,272 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,272 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,278 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:58:00,279 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:58:00,279 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:58:00,282 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 07:58:00,283 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 07:58:00,284 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 07:58:00,286 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,303 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 07:58:00,304 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 07:58:00,304 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 07:58:00,305 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 07:58:00,305 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 07:58:00,306 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 07:58:00,307 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 07:58:00,307 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 07:58:00,307 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 07:58:00,308 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 07:58:00,308 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 07:58:00,336 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 07:58:00,348 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,349 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,355 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,357 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,357 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,358 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-14 07:58:00,363 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 07:58:00,377 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 07:58:00,383 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,383 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:58:00,391 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,395 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-14 07:58:00,406 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:58:00,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:58:00,586 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:58:00,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00 WrapperNode [2022-12-14 07:58:00,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:58:00,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:58:00,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:58:00,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:58:00,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,703 INFO L138 Inliner]: procedures = 691, calls = 2630, calls flagged for inlining = 59, calls inlined = 7, statements flattened = 815 [2022-12-14 07:58:00,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:58:00,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:58:00,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:58:00,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:58:00,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,756 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:58:00,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:58:00,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:58:00,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:58:00,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (1/1) ... [2022-12-14 07:58:00,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:58:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:58:00,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:58:00,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:58:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-12-14 07:58:00,835 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-12-14 07:58:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:58:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-12-14 07:58:00,835 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-12-14 07:58:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:58:00,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 07:58:00,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 07:58:00,836 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2022-12-14 07:58:00,836 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2022-12-14 07:58:00,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:58:00,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:58:00,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 07:58:00,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:58:00,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:58:00,836 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-12-14 07:58:00,837 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-12-14 07:58:00,837 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 07:58:00,837 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 07:58:00,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:58:00,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 07:58:00,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 07:58:00,837 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-12-14 07:58:00,848 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-12-14 07:58:00,848 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2022-12-14 07:58:00,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2022-12-14 07:58:00,848 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 07:58:00,849 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 07:58:00,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:58:00,849 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-12-14 07:58:00,849 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-12-14 07:58:00,849 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-12-14 07:58:00,849 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-12-14 07:58:00,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:58:01,045 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:58:01,047 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:58:01,791 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:58:01,962 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:58:01,962 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 07:58:01,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:58:01 BoogieIcfgContainer [2022-12-14 07:58:01,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:58:01,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:58:01,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:58:01,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:58:01,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:57:58" (1/3) ... [2022-12-14 07:58:01,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48812bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:58:01, skipping insertion in model container [2022-12-14 07:58:01,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:58:00" (2/3) ... [2022-12-14 07:58:01,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48812bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:58:01, skipping insertion in model container [2022-12-14 07:58:01,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:58:01" (3/3) ... [2022-12-14 07:58:01,970 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reset_harness.i [2022-12-14 07:58:01,984 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:58:01,984 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:58:02,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:58:02,024 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;@68ec8afd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:58:02,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:58:02,027 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) [2022-12-14 07:58:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 07:58:02,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:58:02,035 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] [2022-12-14 07:58:02,035 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:58:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:58:02,039 INFO L85 PathProgramCache]: Analyzing trace with hash 260092782, now seen corresponding path program 1 times [2022-12-14 07:58:02,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:58:02,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273959396] [2022-12-14 07:58:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:58:02,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:58:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:58:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:58:03,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:58:03,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273959396] [2022-12-14 07:58:03,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273959396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:58:03,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:58:03,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:58:03,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999257058] [2022-12-14 07:58:03,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:58:03,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:58:03,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:58:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:58:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:58:03,381 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) [2022-12-14 07:58:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:58:04,072 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2022-12-14 07:58:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:58:04,075 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 [2022-12-14 07:58:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:58:04,083 INFO L225 Difference]: With dead ends: 121 [2022-12-14 07:58:04,083 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 07:58:04,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:58:04,090 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 14 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:58:04,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 354 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:58:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 07:58:04,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-12-14 07:58:04,131 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) [2022-12-14 07:58:04,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-12-14 07:58:04,135 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 31 [2022-12-14 07:58:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:58:04,136 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-12-14 07:58:04,136 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) [2022-12-14 07:58:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-12-14 07:58:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 07:58:04,137 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:58:04,137 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] [2022-12-14 07:58:04,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:58:04,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:58:04,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:58:04,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1664605148, now seen corresponding path program 1 times [2022-12-14 07:58:04,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:58:04,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821126676] [2022-12-14 07:58:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:58:04,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:58:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:58:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:58:05,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:58:05,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821126676] [2022-12-14 07:58:05,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821126676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:58:05,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:58:05,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 07:58:05,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090395595] [2022-12-14 07:58:05,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:58:05,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:58:05,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:58:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:58:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:58:05,486 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 07:58:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:58:06,499 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2022-12-14 07:58:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:58:06,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-12-14 07:58:06,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:58:06,502 INFO L225 Difference]: With dead ends: 96 [2022-12-14 07:58:06,502 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 07:58:06,502 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 [2022-12-14 07:58:06,503 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 28 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:58:06,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 420 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:58:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 07:58:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-12-14 07:58:06,516 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) [2022-12-14 07:58:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-12-14 07:58:06,518 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 37 [2022-12-14 07:58:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:58:06,518 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-12-14 07:58:06,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 07:58:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-12-14 07:58:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 07:58:06,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:58:06,520 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] [2022-12-14 07:58:06,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:58:06,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:58:06,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:58:06,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1200533547, now seen corresponding path program 1 times [2022-12-14 07:58:06,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:58:06,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684101727] [2022-12-14 07:58:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:58:06,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:58:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:58:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 07:58:07,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:58:07,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684101727] [2022-12-14 07:58:07,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684101727] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:58:07,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:58:07,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 07:58:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339803220] [2022-12-14 07:58:07,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:58:07,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 07:58:07,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:58:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 07:58:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:58:07,997 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 07:58:09,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:58:09,321 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2022-12-14 07:58:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:58:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 44 [2022-12-14 07:58:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:58:09,323 INFO L225 Difference]: With dead ends: 133 [2022-12-14 07:58:09,323 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 07:58:09,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:58:09,324 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 45 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:58:09,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 470 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 07:58:09,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 07:58:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-12-14 07:58:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 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) [2022-12-14 07:58:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2022-12-14 07:58:09,332 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 44 [2022-12-14 07:58:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:58:09,333 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2022-12-14 07:58:09,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 07:58:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2022-12-14 07:58:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 07:58:09,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:58:09,334 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] [2022-12-14 07:58:09,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:58:09,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:58:09,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:58:09,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1989852472, now seen corresponding path program 1 times [2022-12-14 07:58:09,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:58:09,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638921726] [2022-12-14 07:58:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:58:09,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:58:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:58:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:58:10,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:58:10,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638921726] [2022-12-14 07:58:10,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638921726] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:58:10,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:58:10,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 07:58:10,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397219224] [2022-12-14 07:58:10,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:58:10,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:58:10,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:58:10,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:58:10,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:58:10,492 INFO L87 Difference]: Start difference. First operand 87 states and 102 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) [2022-12-14 07:58:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:58:11,265 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2022-12-14 07:58:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:58:11,265 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 [2022-12-14 07:58:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:58:11,267 INFO L225 Difference]: With dead ends: 100 [2022-12-14 07:58:11,267 INFO L226 Difference]: Without dead ends: 98 [2022-12-14 07:58:11,267 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 [2022-12-14 07:58:11,268 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 28 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:58:11,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 413 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:58:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-14 07:58:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-12-14 07:58:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 07:58:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2022-12-14 07:58:11,282 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 43 [2022-12-14 07:58:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:58:11,283 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2022-12-14 07:58:11,283 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) [2022-12-14 07:58:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2022-12-14 07:58:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 07:58:11,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:58:11,285 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] [2022-12-14 07:58:11,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:58:11,285 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:58:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:58:11,286 INFO L85 PathProgramCache]: Analyzing trace with hash 489918898, now seen corresponding path program 1 times [2022-12-14 07:58:11,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:58:11,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786597702] [2022-12-14 07:58:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:58:11,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:58:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:58:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 07:58:12,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:58:12,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786597702] [2022-12-14 07:58:12,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786597702] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:58:12,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:58:12,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 07:58:12,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641552799] [2022-12-14 07:58:12,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:58:12,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:58:12,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:58:12,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:58:12,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:58:12,448 INFO L87 Difference]: Start difference. First operand 93 states and 108 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) [2022-12-14 07:58:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:58:13,263 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2022-12-14 07:58:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:58:13,264 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 [2022-12-14 07:58:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:58:13,264 INFO L225 Difference]: With dead ends: 104 [2022-12-14 07:58:13,265 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 07:58:13,265 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 [2022-12-14 07:58:13,265 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 32 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:58:13,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 366 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:58:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 07:58:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2022-12-14 07:58:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 07:58:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2022-12-14 07:58:13,276 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 49 [2022-12-14 07:58:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:58:13,276 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2022-12-14 07:58:13,276 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) [2022-12-14 07:58:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2022-12-14 07:58:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 07:58:13,282 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:58:13,282 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] [2022-12-14 07:58:13,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:58:13,282 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:58:13,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:58:13,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2007351451, now seen corresponding path program 1 times [2022-12-14 07:58:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:58:13,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578821846] [2022-12-14 07:58:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:58:13,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:58:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:58:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 07:58:17,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:58:17,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578821846] [2022-12-14 07:58:17,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578821846] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:58:17,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828362563] [2022-12-14 07:58:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:58:17,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:58:17,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:58:17,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:58:17,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc6e275-21a7-40e5-b944-e4fb65ad3a57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:58:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:58:17,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 07:58:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:58:17,684 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 [2022-12-14 07:58:19,493 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:58:19,498 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 07:58:19,828 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 [2022-12-14 07:58:19,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:58:19,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:58:19,882 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 [2022-12-14 07:58:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:58:20,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:58:22,606 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-12-14 08:05:02,146 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.