./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_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_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/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_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/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_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/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 97e90b5866c6e9df01c589395fdbbe46254bc553e4330f2a669b393b022bbd71 --- 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 17:23:00,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:23:00,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:23:00,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:23:00,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:23:00,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:23:00,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:23:00,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:23:00,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:23:00,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:23:00,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:23:00,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:23:00,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:23:00,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:23:00,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:23:00,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:23:00,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:23:00,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:23:00,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:23:00,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:23:00,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:23:00,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:23:00,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:23:00,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:23:00,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:23:00,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:23:00,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:23:00,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:23:00,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:23:00,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:23:00,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:23:00,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:23:00,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:23:00,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:23:00,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:23:00,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:23:00,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:23:00,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:23:00,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:23:00,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:23:00,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:23:00,387 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:23:00,415 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:23:00,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:23:00,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:23:00,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:23:00,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:23:00,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:23:00,424 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:23:00,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:23:00,425 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:23:00,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:23:00,425 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:23:00,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:23:00,426 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:23:00,426 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:23:00,426 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:23:00,427 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:23:00,427 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:23:00,427 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:23:00,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:23:00,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:23:00,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:23:00,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:23:00,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:23:00,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:23:00,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:23:00,430 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:23:00,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:23:00,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:23:00,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:23:00,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:00,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:23:00,432 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:23:00,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:23:00,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:23:00,432 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:23:00,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:23:00,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:23:00,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:23:00,433 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_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97e90b5866c6e9df01c589395fdbbe46254bc553e4330f2a669b393b022bbd71 [2022-10-17 17:23:00,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:23:00,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:23:00,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:23:00,721 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:23:00,721 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:23:00,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i [2022-10-17 17:23:00,805 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/data/5c2769871/cc0c3282860946a79bd1e400d92ff0cc/FLAG5a404c0c7 [2022-10-17 17:23:01,736 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:23:01,737 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i [2022-10-17 17:23:01,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/data/5c2769871/cc0c3282860946a79bd1e400d92ff0cc/FLAG5a404c0c7 [2022-10-17 17:23:02,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/data/5c2769871/cc0c3282860946a79bd1e400d92ff0cc [2022-10-17 17:23:02,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:23:02,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:23:02,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:02,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:23:02,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:23:02,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f0aefc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:02, skipping insertion in model container [2022-10-17 17:23:02,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:02" (1/1) ... [2022-10-17 17:23:02,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:23:02,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:23:02,673 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_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4495,4508] [2022-10-17 17:23:02,682 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_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4555,4568] [2022-10-17 17:23:03,954 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,955 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,956 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,957 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,958 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,973 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,973 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,976 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,976 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,979 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,980 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,981 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:03,981 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:04,462 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:23:04,463 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:23:04,465 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:23:04,466 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:23:04,468 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:23:04,469 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:23:04,470 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:23:04,471 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:23:04,472 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:23:04,472 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:23:04,732 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:23:05,112 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,113 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,137 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,139 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,145 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,146 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,162 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,163 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,164 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,164 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,165 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,166 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,166 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:05,237 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:23:05,251 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_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4495,4508] [2022-10-17 17:23:05,251 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_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness.i[4555,4568] [2022-10-17 17:23:05,288 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,289 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,289 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,290 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,291 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,298 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,298 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,299 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,300 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,301 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,302 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,302 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,303 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,337 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:23:05,338 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:23:05,339 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:23:05,340 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:23:05,341 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:23:05,341 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:23:05,342 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:23:05,343 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:23:05,343 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:23:05,344 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:23:05,366 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:23:05,531 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,532 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,541 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,542 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,546 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,546 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,561 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,562 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,563 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,563 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,564 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,564 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,565 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:23:05,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:05,831 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:23:05,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05 WrapperNode [2022-10-17 17:23:05,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:05,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:05,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:23:05,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:23:05,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:05,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:06,107 INFO L138 Inliner]: procedures = 775, calls = 2499, calls flagged for inlining = 69, calls inlined = 19, statements flattened = 1070 [2022-10-17 17:23:06,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:06,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:23:06,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:23:06,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:23:06,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:06,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:06,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:06,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:06,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:06,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:06,275 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:06,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:06,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:23:06,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:23:06,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:23:06,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:23:06,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (1/1) ... [2022-10-17 17:23:06,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:06,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:06,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:23:06,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:23:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-10-17 17:23:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-10-17 17:23:06,402 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-10-17 17:23:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:23:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-10-17 17:23:06,403 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-10-17 17:23:06,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:23:06,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:23:06,403 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2022-10-17 17:23:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2022-10-17 17:23:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:23:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:23:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:23:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:23:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:23:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-10-17 17:23:06,406 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-10-17 17:23:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-10-17 17:23:06,406 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-10-17 17:23:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:23:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-10-17 17:23:06,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-10-17 17:23:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:23:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-10-17 17:23:06,407 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-10-17 17:23:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:23:06,408 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2022-10-17 17:23:06,408 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2022-10-17 17:23:06,408 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-10-17 17:23:06,409 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-10-17 17:23:06,409 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2022-10-17 17:23:06,409 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2022-10-17 17:23:06,409 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2022-10-17 17:23:06,410 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2022-10-17 17:23:06,411 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2022-10-17 17:23:06,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2022-10-17 17:23:06,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:23:06,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2022-10-17 17:23:06,415 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2022-10-17 17:23:06,415 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2022-10-17 17:23:06,416 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 17:23:06,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 17:23:06,416 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2022-10-17 17:23:06,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2022-10-17 17:23:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2022-10-17 17:23:06,425 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2022-10-17 17:23:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2022-10-17 17:23:06,425 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2022-10-17 17:23:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:23:06,425 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:23:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2022-10-17 17:23:06,426 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2022-10-17 17:23:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:23:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-10-17 17:23:06,426 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-10-17 17:23:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-10-17 17:23:06,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-10-17 17:23:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-10-17 17:23:06,427 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-10-17 17:23:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2022-10-17 17:23:06,427 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2022-10-17 17:23:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-10-17 17:23:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-10-17 17:23:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2022-10-17 17:23:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2022-10-17 17:23:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-10-17 17:23:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-10-17 17:23:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:23:06,987 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:23:06,990 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:23:07,200 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !true; [2022-10-17 17:23:07,201 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2022-10-17 17:23:07,230 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2022-10-17 17:23:07,271 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2022-10-17 17:23:08,448 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !true; [2022-10-17 17:23:08,449 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !true; [2022-10-17 17:23:08,477 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:23:08,659 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:23:08,660 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-10-17 17:23:08,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:08 BoogieIcfgContainer [2022-10-17 17:23:08,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:23:08,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:23:08,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:23:08,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:23:08,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:23:02" (1/3) ... [2022-10-17 17:23:08,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e58fc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:08, skipping insertion in model container [2022-10-17 17:23:08,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:05" (2/3) ... [2022-10-17 17:23:08,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e58fc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:08, skipping insertion in model container [2022-10-17 17:23:08,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:08" (3/3) ... [2022-10-17 17:23:08,671 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_remove_harness.i [2022-10-17 17:23:08,690 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:23:08,690 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:23:08,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:23:08,778 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;@6b7f0f8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:23:08,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:23:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 259 states, 149 states have (on average 1.221476510067114) internal successors, (182), 144 states have internal predecessors, (182), 87 states have call successors, (87), 27 states have call predecessors, (87), 27 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2022-10-17 17:23:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-10-17 17:23:08,806 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:08,807 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:08,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:08,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:08,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1987443898, now seen corresponding path program 1 times [2022-10-17 17:23:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:08,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166749831] [2022-10-17 17:23:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:08,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:09,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:23:09,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014836581] [2022-10-17 17:23:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:09,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:09,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:09,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:09,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:23:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:23:10,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-10-17 17:23:10,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:23:10,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:10,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166749831] [2022-10-17 17:23:10,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:23:10,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014836581] [2022-10-17 17:23:10,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014836581] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:10,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:10,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:23:10,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847353792] [2022-10-17 17:23:10,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:10,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:10,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:10,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:10,403 INFO L87 Difference]: Start difference. First operand has 259 states, 149 states have (on average 1.221476510067114) internal successors, (182), 144 states have internal predecessors, (182), 87 states have call successors, (87), 27 states have call predecessors, (87), 27 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-10-17 17:23:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:11,301 INFO L93 Difference]: Finished difference Result 488 states and 698 transitions. [2022-10-17 17:23:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:23:11,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 127 [2022-10-17 17:23:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:11,321 INFO L225 Difference]: With dead ends: 488 [2022-10-17 17:23:11,321 INFO L226 Difference]: Without dead ends: 259 [2022-10-17 17:23:11,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:23:11,331 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 1 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:11,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1207 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 17:23:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-10-17 17:23:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-10-17 17:23:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 145 states have internal predecessors, (170), 87 states have call successors, (87), 27 states have call predecessors, (87), 28 states have return successors, (86), 86 states have call predecessors, (86), 85 states have call successors, (86) [2022-10-17 17:23:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 343 transitions. [2022-10-17 17:23:11,411 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 343 transitions. Word has length 127 [2022-10-17 17:23:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:11,413 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 343 transitions. [2022-10-17 17:23:11,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-10-17 17:23:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 343 transitions. [2022-10-17 17:23:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-10-17 17:23:11,417 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:11,418 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:11,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:11,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 17:23:11,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1602005392, now seen corresponding path program 1 times [2022-10-17 17:23:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:11,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321774573] [2022-10-17 17:23:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:11,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-10-17 17:23:13,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:13,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321774573] [2022-10-17 17:23:13,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321774573] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:13,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:13,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:23:13,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104964619] [2022-10-17 17:23:13,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:13,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:13,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:13,486 INFO L87 Difference]: Start difference. First operand 259 states and 343 transitions. Second operand has 5 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-10-17 17:23:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:14,653 INFO L93 Difference]: Finished difference Result 434 states and 584 transitions. [2022-10-17 17:23:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:23:14,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) Word has length 131 [2022-10-17 17:23:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:14,660 INFO L225 Difference]: With dead ends: 434 [2022-10-17 17:23:14,661 INFO L226 Difference]: Without dead ends: 262 [2022-10-17 17:23:14,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:14,663 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 0 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:14,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1068 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 17:23:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-10-17 17:23:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2022-10-17 17:23:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 144 states have (on average 1.1875) internal successors, (171), 147 states have internal predecessors, (171), 87 states have call successors, (87), 27 states have call predecessors, (87), 29 states have return successors, (93), 86 states have call predecessors, (93), 85 states have call successors, (93) [2022-10-17 17:23:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 351 transitions. [2022-10-17 17:23:14,693 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 351 transitions. Word has length 131 [2022-10-17 17:23:14,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:14,694 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 351 transitions. [2022-10-17 17:23:14,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-10-17 17:23:14,694 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 351 transitions. [2022-10-17 17:23:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-10-17 17:23:14,697 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:14,698 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:14,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:23:14,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2076489748, now seen corresponding path program 1 times [2022-10-17 17:23:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:14,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222923608] [2022-10-17 17:23:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-10-17 17:23:17,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:17,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222923608] [2022-10-17 17:23:17,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222923608] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:17,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157255912] [2022-10-17 17:23:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:17,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:17,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:17,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:18,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:23:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 2890 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-17 17:23:18,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-10-17 17:23:19,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-10-17 17:23:19,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157255912] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:19,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:23:19,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7] total 15 [2022-10-17 17:23:19,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619456823] [2022-10-17 17:23:19,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:19,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:19,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:23:19,348 INFO L87 Difference]: Start difference. First operand 261 states and 351 transitions. Second operand has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2022-10-17 17:23:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:21,026 INFO L93 Difference]: Finished difference Result 269 states and 358 transitions. [2022-10-17 17:23:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:23:21,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 135 [2022-10-17 17:23:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:21,030 INFO L225 Difference]: With dead ends: 269 [2022-10-17 17:23:21,030 INFO L226 Difference]: Without dead ends: 267 [2022-10-17 17:23:21,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:23:21,031 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 9 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:21,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1169 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-10-17 17:23:21,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-10-17 17:23:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2022-10-17 17:23:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 147 states have (on average 1.183673469387755) internal successors, (174), 150 states have internal predecessors, (174), 87 states have call successors, (87), 28 states have call predecessors, (87), 30 states have return successors, (93), 86 states have call predecessors, (93), 85 states have call successors, (93) [2022-10-17 17:23:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 354 transitions. [2022-10-17 17:23:21,080 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 354 transitions. Word has length 135 [2022-10-17 17:23:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:21,082 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 354 transitions. [2022-10-17 17:23:21,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2022-10-17 17:23:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 354 transitions. [2022-10-17 17:23:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-10-17 17:23:21,092 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:21,092 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:21,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:21,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:21,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1418729824, now seen corresponding path program 1 times [2022-10-17 17:23:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950599068] [2022-10-17 17:23:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-10-17 17:23:24,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:24,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950599068] [2022-10-17 17:23:24,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950599068] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:24,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094530012] [2022-10-17 17:23:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:24,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:24,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:24,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:24,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:23:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:24,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 2918 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-17 17:23:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-10-17 17:23:24,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:23:24,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094530012] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:24,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:23:24,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-10-17 17:23:24,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946856182] [2022-10-17 17:23:24,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:24,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:23:24,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:24,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:23:24,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:23:24,966 INFO L87 Difference]: Start difference. First operand 265 states and 354 transitions. Second operand has 6 states, 3 states have (on average 19.666666666666668) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2022-10-17 17:23:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:26,634 INFO L93 Difference]: Finished difference Result 483 states and 655 transitions. [2022-10-17 17:23:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:23:26,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 19.666666666666668) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 144 [2022-10-17 17:23:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:26,638 INFO L225 Difference]: With dead ends: 483 [2022-10-17 17:23:26,638 INFO L226 Difference]: Without dead ends: 268 [2022-10-17 17:23:26,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:23:26,641 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 0 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:26,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1343 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-10-17 17:23:26,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-10-17 17:23:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2022-10-17 17:23:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 152 states have internal predecessors, (175), 87 states have call successors, (87), 28 states have call predecessors, (87), 31 states have return successors, (98), 86 states have call predecessors, (98), 85 states have call successors, (98) [2022-10-17 17:23:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 360 transitions. [2022-10-17 17:23:26,662 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 360 transitions. Word has length 144 [2022-10-17 17:23:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:26,663 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 360 transitions. [2022-10-17 17:23:26,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 19.666666666666668) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2022-10-17 17:23:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 360 transitions. [2022-10-17 17:23:26,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-10-17 17:23:26,665 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:26,666 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:26,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:26,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:26,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1291579152, now seen corresponding path program 1 times [2022-10-17 17:23:26,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:26,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212722467] [2022-10-17 17:23:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:26,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-10-17 17:23:28,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:28,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212722467] [2022-10-17 17:23:28,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212722467] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:28,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862046006] [2022-10-17 17:23:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:28,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:28,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:28,819 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:28,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54d9cd1c-5851-4f0e-9449-cdee7aef0f9d/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:23:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:29,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 2942 conjuncts, 35 conjunts are in the unsatisfiable core [2022-10-17 17:23:29,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:29,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 17:23:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-10-17 17:23:30,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:23:30,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862046006] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:30,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:23:30,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 20 [2022-10-17 17:23:30,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473110604] [2022-10-17 17:23:30,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:30,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 17:23:30,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:30,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 17:23:30,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-10-17 17:23:30,172 INFO L87 Difference]: Start difference. First operand 267 states and 360 transitions. Second operand has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (36), 3 states have call predecessors, (36), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34)