./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_compare_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_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/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_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/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_34820050-8128-4094-8075-8a236bd82565/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 66fb9bfec5c458b51d86deb6748dd65f162e7ac6a772af5f3fec59d101a18d8d --- 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 17:36:39,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:36:39,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:36:39,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:36:39,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:36:39,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:36:39,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:36:39,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:36:39,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:36:39,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:36:39,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:36:39,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:36:39,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:36:39,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:36:39,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:36:39,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:36:39,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:36:39,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:36:39,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:36:39,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:36:39,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:36:39,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:36:39,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:36:39,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:36:39,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:36:39,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:36:39,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:36:39,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:36:39,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:36:39,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:36:39,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:36:39,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:36:39,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:36:39,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:36:39,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:36:39,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:36:39,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:36:39,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:36:39,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:36:39,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:36:39,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:36:39,266 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:36:39,291 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:36:39,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:36:39,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:36:39,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:36:39,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:36:39,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:36:39,294 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:36:39,294 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:36:39,294 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:36:39,294 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:36:39,295 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:36:39,295 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:36:39,295 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:36:39,295 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:36:39,295 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:36:39,296 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:36:39,296 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:36:39,296 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:36:39,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:36:39,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:36:39,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:36:39,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:36:39,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:36:39,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:36:39,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:36:39,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:36:39,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:36:39,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:36:39,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:36:39,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:39,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:36:39,300 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:36:39,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:36:39,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:36:39,301 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:36:39,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:36:39,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:36:39,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:36:39,302 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_34820050-8128-4094-8075-8a236bd82565/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66fb9bfec5c458b51d86deb6748dd65f162e7ac6a772af5f3fec59d101a18d8d [2022-10-17 17:36:39,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:36:39,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:36:39,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:36:39,577 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:36:39,578 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:36:39,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i [2022-10-17 17:36:39,655 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/data/f06bd7bd0/9ffb6d3bd78b48188f34090a39b18fa6/FLAG1156646d4 [2022-10-17 17:36:40,451 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:36:40,452 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i [2022-10-17 17:36:40,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/data/f06bd7bd0/9ffb6d3bd78b48188f34090a39b18fa6/FLAG1156646d4 [2022-10-17 17:36:40,976 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/data/f06bd7bd0/9ffb6d3bd78b48188f34090a39b18fa6 [2022-10-17 17:36:40,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:36:40,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:36:40,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:40,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:36:40,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:36:40,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:40,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3187c549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:40, skipping insertion in model container [2022-10-17 17:36:40,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:40" (1/1) ... [2022-10-17 17:36:41,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:36:41,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:36:41,422 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_34820050-8128-4094-8075-8a236bd82565/sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i[4492,4505] [2022-10-17 17:36:41,429 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_34820050-8128-4094-8075-8a236bd82565/sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i[4552,4565] [2022-10-17 17:36:42,436 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:42,438 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:42,441 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:42,443 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:42,444 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:42,458 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:42,459 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:42,461 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:42,462 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:42,931 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:36:42,932 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:36:42,934 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:36:42,935 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:36:42,937 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:36:42,938 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:36:42,938 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:36:42,939 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:36:42,940 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:36:42,941 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:36:43,103 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:36:43,278 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,279 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:43,476 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:36:43,511 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_34820050-8128-4094-8075-8a236bd82565/sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i[4492,4505] [2022-10-17 17:36:43,512 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_34820050-8128-4094-8075-8a236bd82565/sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i[4552,4565] [2022-10-17 17:36:43,546 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,546 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,547 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,547 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,548 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,559 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,560 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,561 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,561 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,618 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:36:43,619 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:36:43,620 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:36:43,620 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:36:43,622 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:36:43,623 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:36:43,623 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:36:43,624 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:36:43,624 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:36:43,624 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:36:43,654 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:36:43,773 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,774 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:36:43,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:44,094 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:36:44,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44 WrapperNode [2022-10-17 17:36:44,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:44,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:44,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:36:44,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:36:44,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,359 INFO L138 Inliner]: procedures = 693, calls = 2780, calls flagged for inlining = 57, calls inlined = 5, statements flattened = 822 [2022-10-17 17:36:44,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:44,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:36:44,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:36:44,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:36:44,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,442 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:36:44,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:36:44,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:36:44,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:36:44,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (1/1) ... [2022-10-17 17:36:44,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:44,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:44,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:36:44,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:36:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2022-10-17 17:36:44,561 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2022-10-17 17:36:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_compare [2022-10-17 17:36:44,561 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_compare [2022-10-17 17:36:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2022-10-17 17:36:44,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2022-10-17 17:36:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-10-17 17:36:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-10-17 17:36:44,563 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-10-17 17:36:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:36:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:36:44,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:36:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:36:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:36:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:36:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:36:44,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:36:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-10-17 17:36:44,566 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-10-17 17:36:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 17:36:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_bytes [2022-10-17 17:36:44,567 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_bytes [2022-10-17 17:36:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:36:44,567 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:36:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:36:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-10-17 17:36:44,568 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-10-17 17:36:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-10-17 17:36:44,568 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-10-17 17:36:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:36:44,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:36:44,947 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:36:44,950 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:36:46,237 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:36:46,437 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:36:46,437 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:36:46,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:46 BoogieIcfgContainer [2022-10-17 17:36:46,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:36:46,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:36:46,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:36:46,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:36:46,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:36:40" (1/3) ... [2022-10-17 17:36:46,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4941ab2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:46, skipping insertion in model container [2022-10-17 17:36:46,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:44" (2/3) ... [2022-10-17 17:36:46,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4941ab2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:46, skipping insertion in model container [2022-10-17 17:36:46,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:46" (3/3) ... [2022-10-17 17:36:46,450 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_compare_harness.i [2022-10-17 17:36:46,469 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:36:46,469 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:36:46,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:36:46,530 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;@3b6c6a08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:36:46,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:36:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 57 states have internal predecessors, (71), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-10-17 17:36:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 17:36:46,546 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:46,546 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:46,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash 503850300, now seen corresponding path program 1 times [2022-10-17 17:36:46,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:46,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801017673] [2022-10-17 17:36:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:36:47,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801017673] [2022-10-17 17:36:47,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801017673] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:47,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:47,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:36:47,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977048239] [2022-10-17 17:36:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:47,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:36:47,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:36:47,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:36:47,937 INFO L87 Difference]: Start difference. First operand has 101 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 57 states have internal predecessors, (71), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:36:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:48,181 INFO L93 Difference]: Finished difference Result 162 states and 228 transitions. [2022-10-17 17:36:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:36:48,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-10-17 17:36:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:48,200 INFO L225 Difference]: With dead ends: 162 [2022-10-17 17:36:48,200 INFO L226 Difference]: Without dead ends: 116 [2022-10-17 17:36:48,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:36:48,214 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 9 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:48,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 364 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:36:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-10-17 17:36:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2022-10-17 17:36:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.234375) internal successors, (79), 65 states have internal predecessors, (79), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-10-17 17:36:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 154 transitions. [2022-10-17 17:36:48,275 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 154 transitions. Word has length 41 [2022-10-17 17:36:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:48,276 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 154 transitions. [2022-10-17 17:36:48,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:36:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 154 transitions. [2022-10-17 17:36:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 17:36:48,280 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:48,280 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:48,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:36:48,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash -483925148, now seen corresponding path program 1 times [2022-10-17 17:36:48,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:48,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146216605] [2022-10-17 17:36:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:48,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:36:48,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:48,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146216605] [2022-10-17 17:36:48,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146216605] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:48,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:48,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:36:48,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605685674] [2022-10-17 17:36:48,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:48,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:36:48,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:36:48,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:36:48,856 INFO L87 Difference]: Start difference. First operand 113 states and 154 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:36:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:49,043 INFO L93 Difference]: Finished difference Result 135 states and 181 transitions. [2022-10-17 17:36:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:36:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2022-10-17 17:36:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:49,050 INFO L225 Difference]: With dead ends: 135 [2022-10-17 17:36:49,051 INFO L226 Difference]: Without dead ends: 119 [2022-10-17 17:36:49,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:36:49,056 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 0 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:49,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 346 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:36:49,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-10-17 17:36:49,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-10-17 17:36:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 38 states have call successors, (38), 10 states have call predecessors, (38), 11 states have return successors, (39), 39 states have call predecessors, (39), 37 states have call successors, (39) [2022-10-17 17:36:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 161 transitions. [2022-10-17 17:36:49,079 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 161 transitions. Word has length 45 [2022-10-17 17:36:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:49,080 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 161 transitions. [2022-10-17 17:36:49,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:36:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 161 transitions. [2022-10-17 17:36:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 17:36:49,083 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:49,083 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:49,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:36:49,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash 71909681, now seen corresponding path program 1 times [2022-10-17 17:36:49,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:49,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134107140] [2022-10-17 17:36:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:49,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:36:50,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:50,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134107140] [2022-10-17 17:36:50,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134107140] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:50,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:50,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:36:50,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868436515] [2022-10-17 17:36:50,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:50,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:36:50,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:50,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:36:50,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:50,070 INFO L87 Difference]: Start difference. First operand 119 states and 161 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 17:36:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:50,315 INFO L93 Difference]: Finished difference Result 143 states and 189 transitions. [2022-10-17 17:36:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:36:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 46 [2022-10-17 17:36:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:50,318 INFO L225 Difference]: With dead ends: 143 [2022-10-17 17:36:50,318 INFO L226 Difference]: Without dead ends: 126 [2022-10-17 17:36:50,319 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 [2022-10-17 17:36:50,320 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 17 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:50,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 597 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:36:50,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-10-17 17:36:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-10-17 17:36:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 72 states have internal predecessors, (86), 40 states have call successors, (40), 10 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2022-10-17 17:36:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 166 transitions. [2022-10-17 17:36:50,338 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 166 transitions. Word has length 46 [2022-10-17 17:36:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:50,338 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 166 transitions. [2022-10-17 17:36:50,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 17:36:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 166 transitions. [2022-10-17 17:36:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 17:36:50,342 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:50,342 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:50,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:36:50,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash 404379916, now seen corresponding path program 1 times [2022-10-17 17:36:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:50,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234546648] [2022-10-17 17:36:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:50,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-10-17 17:36:51,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234546648] [2022-10-17 17:36:51,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234546648] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:51,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:51,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:36:51,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253169417] [2022-10-17 17:36:51,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:51,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:36:51,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:36:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:51,154 INFO L87 Difference]: Start difference. First operand 123 states and 166 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-10-17 17:36:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:51,408 INFO L93 Difference]: Finished difference Result 179 states and 236 transitions. [2022-10-17 17:36:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:36:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2022-10-17 17:36:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:51,416 INFO L225 Difference]: With dead ends: 179 [2022-10-17 17:36:51,416 INFO L226 Difference]: Without dead ends: 139 [2022-10-17 17:36:51,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:51,420 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 28 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:51,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 605 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:36:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-10-17 17:36:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2022-10-17 17:36:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 80 states have internal predecessors, (96), 41 states have call successors, (41), 11 states have call predecessors, (41), 13 states have return successors, (42), 42 states have call predecessors, (42), 40 states have call successors, (42) [2022-10-17 17:36:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 179 transitions. [2022-10-17 17:36:51,441 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 179 transitions. Word has length 62 [2022-10-17 17:36:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:51,442 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 179 transitions. [2022-10-17 17:36:51,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-10-17 17:36:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 179 transitions. [2022-10-17 17:36:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-17 17:36:51,445 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:51,445 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:36:51,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:36:51,445 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:51,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:51,446 INFO L85 PathProgramCache]: Analyzing trace with hash 714050021, now seen corresponding path program 1 times [2022-10-17 17:36:51,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:51,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790849863] [2022-10-17 17:36:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:51,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 17:36:53,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:53,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790849863] [2022-10-17 17:36:53,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790849863] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:53,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912712625] [2022-10-17 17:36:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:53,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:53,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:53,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:53,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34820050-8128-4094-8075-8a236bd82565/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:36:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:54,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 77 conjunts are in the unsatisfiable core [2022-10-17 17:36:54,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:54,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 60 [2022-10-17 17:36:54,932 INFO L356 Elim1Store]: treesize reduction 15, result has 53.1 percent of original size [2022-10-17 17:36:54,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 124 [2022-10-17 17:36:55,052 INFO L356 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2022-10-17 17:36:55,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 91 [2022-10-17 17:36:57,471 INFO L356 Elim1Store]: treesize reduction 93, result has 7.9 percent of original size [2022-10-17 17:36:57,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 113 [2022-10-17 17:36:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:36:57,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:01,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 52 treesize of output 48 [2022-10-17 17:37:01,194 INFO L356 Elim1Store]: treesize reduction 14, result has 76.7 percent of original size [2022-10-17 17:37:01,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 120 [2022-10-17 17:37:01,482 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:37:01,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 306 treesize of output 316 [2022-10-17 17:37:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 17:37:02,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912712625] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:02,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270165554] [2022-10-17 17:37:02,339 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2022-10-17 17:37:02,340 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:37:02,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:37:02,349 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:37:02,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:37:06,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:06,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:06,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:06,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:06,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:06,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1746 treesize of output 1374 [2022-10-17 17:37:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:07,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:07,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:07,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:07,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:07,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1746 treesize of output 1374