./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 dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/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_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta --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-dbf71c6-m [2022-10-17 17:36:04,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:36:04,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:36:04,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:36:04,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:36:04,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:36:04,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:36:04,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:36:04,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:36:04,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:36:04,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:36:04,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:36:04,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:36:04,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:36:04,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:36:04,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:36:04,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:36:04,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:36:04,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:36:04,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:36:04,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:36:04,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:36:04,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:36:04,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:36:04,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:36:04,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:36:04,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:36:04,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:36:04,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:36:04,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:36:04,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:36:04,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:36:04,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:36:04,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:36:04,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:36:04,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:36:04,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:36:04,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:36:04,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:36:04,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:36:04,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:36:04,315 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:36:04,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:36:04,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:36:04,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:36:04,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:36:04,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:36:04,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:36:04,359 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:36:04,360 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:36:04,360 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:36:04,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:36:04,361 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:36:04,361 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:36:04,362 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:36:04,362 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:36:04,362 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:36:04,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:36:04,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:36:04,363 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:36:04,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:36:04,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:36:04,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:36:04,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:36:04,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:36:04,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:36:04,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:36:04,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:36:04,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:36:04,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:36:04,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:36:04,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:04,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:36:04,367 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:36:04,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:36:04,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:36:04,378 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:36:04,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:36:04,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:36:04,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:36:04,379 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_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd [2022-10-17 17:36:04,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:36:04,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:36:04,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:36:04,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:36:04,675 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:36:04,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2022-10-17 17:36:04,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/data/a07c0abbd/57fb966a8356416db1a918d97708eaeb/FLAGb09bab33e [2022-10-17 17:36:05,625 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:36:05,626 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2022-10-17 17:36:05,667 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/data/a07c0abbd/57fb966a8356416db1a918d97708eaeb/FLAGb09bab33e [2022-10-17 17:36:06,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/data/a07c0abbd/57fb966a8356416db1a918d97708eaeb [2022-10-17 17:36:06,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:36:06,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:36:06,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:06,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:36:06,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:36:06,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:06" (1/1) ... [2022-10-17 17:36:06,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b038723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:06, skipping insertion in model container [2022-10-17 17:36:06,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:06" (1/1) ... [2022-10-17 17:36:06,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:36:06,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:36:06,566 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2022-10-17 17:36:06,575 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2022-10-17 17:36:07,659 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:07,660 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:07,660 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:07,661 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:07,663 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:07,679 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:07,679 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:07,681 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:07,682 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,163 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:36:08,165 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:36:08,166 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:36:08,168 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:36:08,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:36:08,176 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:36:08,177 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:36:08,179 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:36:08,180 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:36:08,181 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:36:08,399 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:36:08,562 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,562 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:08,707 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:36:08,721 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2022-10-17 17:36:08,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2022-10-17 17:36:08,758 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,759 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,759 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,760 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,761 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,767 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,768 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,769 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,769 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,802 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:36:08,803 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:36:08,803 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:36:08,804 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:36:08,805 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:36:08,806 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:36:08,807 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:36:08,807 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:36:08,808 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:36:08,808 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:36:08,829 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:36:08,919 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,920 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:08,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:09,244 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:36:09,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09 WrapperNode [2022-10-17 17:36:09,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:09,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:09,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:36:09,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:36:09,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,511 INFO L138 Inliner]: procedures = 691, calls = 2631, calls flagged for inlining = 59, calls inlined = 7, statements flattened = 816 [2022-10-17 17:36:09,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:09,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:36:09,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:36:09,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:36:09,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,613 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:36:09,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:36:09,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:36:09,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:36:09,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (1/1) ... [2022-10-17 17:36:09,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:09,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:09,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:36:09,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c28e0e2-d113-488c-996b-110c985c6903/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:36:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-10-17 17:36:09,732 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-10-17 17:36:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:36:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-10-17 17:36:09,734 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-10-17 17:36:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:36:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:36:09,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:36:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2022-10-17 17:36:09,736 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2022-10-17 17:36:09,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:36:09,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:36:09,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:36:09,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:36:09,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:36:09,737 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-10-17 17:36:09,737 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-10-17 17:36:09,737 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:36:09,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:36:09,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:36:09,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:36:09,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:36:09,764 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-10-17 17:36:09,765 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-10-17 17:36:09,765 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2022-10-17 17:36:09,766 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2022-10-17 17:36:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-10-17 17:36:09,766 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-10-17 17:36:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:36:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-10-17 17:36:09,766 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-10-17 17:36:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-10-17 17:36:09,767 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-10-17 17:36:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:36:10,114 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:36:10,118 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:36:11,446 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:36:11,835 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:36:11,835 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:36:11,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:11 BoogieIcfgContainer [2022-10-17 17:36:11,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:36:11,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:36:11,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:36:11,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:36:11,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:36:06" (1/3) ... [2022-10-17 17:36:11,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9c6fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:11, skipping insertion in model container [2022-10-17 17:36:11,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:09" (2/3) ... [2022-10-17 17:36:11,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9c6fdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:11, skipping insertion in model container [2022-10-17 17:36:11,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:11" (3/3) ... [2022-10-17 17:36:11,877 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reset_harness.i [2022-10-17 17:36:11,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:36:11,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:36:11,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:36:12,001 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;@53cd68eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:36:12,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:36:12,007 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) [2022-10-17 17:36:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-17 17:36:12,017 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:12,018 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] [2022-10-17 17:36:12,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:12,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2135767528, now seen corresponding path program 1 times [2022-10-17 17:36:12,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:12,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354746708] [2022-10-17 17:36:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:12,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:36:14,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:14,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354746708] [2022-10-17 17:36:14,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354746708] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:14,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:14,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:36:14,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514684938] [2022-10-17 17:36:14,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:14,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:36:14,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:14,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:36:14,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:14,773 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) [2022-10-17 17:36:15,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:15,910 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2022-10-17 17:36:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:36:15,916 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 [2022-10-17 17:36:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:15,931 INFO L225 Difference]: With dead ends: 121 [2022-10-17 17:36:15,931 INFO L226 Difference]: Without dead ends: 79 [2022-10-17 17:36:15,937 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 [2022-10-17 17:36:15,948 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 13 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:15,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 354 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 17:36:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-10-17 17:36:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-10-17 17:36:15,997 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) [2022-10-17 17:36:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-10-17 17:36:16,001 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 31 [2022-10-17 17:36:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:16,002 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-10-17 17:36:16,003 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) [2022-10-17 17:36:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-10-17 17:36:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 17:36:16,005 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:16,006 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] [2022-10-17 17:36:16,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:36:16,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:16,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2101338410, now seen corresponding path program 1 times [2022-10-17 17:36:16,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:16,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532242086] [2022-10-17 17:36:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:16,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:36:18,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532242086] [2022-10-17 17:36:18,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532242086] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:18,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:18,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:36:18,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618884596] [2022-10-17 17:36:18,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:18,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:36:18,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:18,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:36:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:36:18,782 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) [2022-10-17 17:36:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:20,723 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2022-10-17 17:36:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:36:20,724 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 [2022-10-17 17:36:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:20,726 INFO L225 Difference]: With dead ends: 96 [2022-10-17 17:36:20,726 INFO L226 Difference]: Without dead ends: 94 [2022-10-17 17:36:20,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:36:20,728 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 26 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:20,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 420 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-17 17:36:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-17 17:36:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-10-17 17:36:20,748 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) [2022-10-17 17:36:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-10-17 17:36:20,750 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 37 [2022-10-17 17:36:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:20,751 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-10-17 17:36:20,751 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) [2022-10-17 17:36:20,751 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-10-17 17:36:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 17:36:20,753 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:20,753 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] [2022-10-17 17:36:20,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:36:20,754 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:20,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:20,754 INFO L85 PathProgramCache]: Analyzing trace with hash 257990555, now seen corresponding path program 1 times [2022-10-17 17:36:20,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:20,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976643050] [2022-10-17 17:36:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:20,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 17:36:23,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:23,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976643050] [2022-10-17 17:36:23,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976643050] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:23,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:23,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-10-17 17:36:23,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204420624] [2022-10-17 17:36:23,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 17:36:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 17:36:23,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:36:23,651 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) [2022-10-17 17:36:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:25,853 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2022-10-17 17:36:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 17:36:25,854 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 [2022-10-17 17:36:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:25,856 INFO L225 Difference]: With dead ends: 133 [2022-10-17 17:36:25,856 INFO L226 Difference]: Without dead ends: 94 [2022-10-17 17:36:25,857 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 [2022-10-17 17:36:25,858 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 44 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:25,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 470 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-10-17 17:36:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-17 17:36:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-10-17 17:36:25,887 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) [2022-10-17 17:36:25,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2022-10-17 17:36:25,893 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 44 [2022-10-17 17:36:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:25,894 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2022-10-17 17:36:25,894 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) [2022-10-17 17:36:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2022-10-17 17:36:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 17:36:25,902 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:25,903 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] [2022-10-17 17:36:25,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:36:25,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash -418782654, now seen corresponding path program 1 times [2022-10-17 17:36:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:25,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055789413] [2022-10-17 17:36:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:25,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:36:28,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:28,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055789413] [2022-10-17 17:36:28,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055789413] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:28,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:28,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:36:28,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677244375] [2022-10-17 17:36:28,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:28,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:36:28,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:36:28,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:36:28,337 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) [2022-10-17 17:36:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:30,496 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2022-10-17 17:36:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:36:30,497 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 [2022-10-17 17:36:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:30,499 INFO L225 Difference]: With dead ends: 100 [2022-10-17 17:36:30,499 INFO L226 Difference]: Without dead ends: 98 [2022-10-17 17:36:30,500 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 [2022-10-17 17:36:30,501 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 26 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:30,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 413 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-10-17 17:36:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-10-17 17:36:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-10-17 17:36:30,519 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) [2022-10-17 17:36:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2022-10-17 17:36:30,521 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 43 [2022-10-17 17:36:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:30,521 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2022-10-17 17:36:30,522 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) [2022-10-17 17:36:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2022-10-17 17:36:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-17 17:36:30,524 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:30,524 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] [2022-10-17 17:36:30,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:36:30,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -463655508, now seen corresponding path program 1 times [2022-10-17 17:36:30,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:30,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983340968] [2022-10-17 17:36:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:30,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 17:36:33,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:33,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983340968] [2022-10-17 17:36:33,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983340968] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:33,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:33,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 17:36:33,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025441311] [2022-10-17 17:36:33,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:33,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 17:36:33,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 17:36:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-17 17:36:33,296 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)