./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:36:06,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:36:06,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:36:06,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:36:06,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:36:06,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:36:06,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:36:06,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:36:06,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:36:06,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:36:06,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:36:06,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:36:06,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:36:06,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:36:06,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:36:06,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:36:06,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:36:06,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:36:06,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:36:06,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:36:06,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:36:06,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:36:06,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:36:06,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:36:06,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:36:06,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:36:06,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:36:06,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:36:06,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:36:06,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:36:06,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:36:06,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:36:06,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:36:06,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:36:06,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:36:06,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:36:06,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:36:06,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:36:06,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:36:06,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:36:06,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:36:06,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 10:36:06,382 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:36:06,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:36:06,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:36:06,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:36:06,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:36:06,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:36:06,384 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:36:06,385 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:36:06,385 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:36:06,385 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:36:06,385 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:36:06,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:36:06,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:36:06,386 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:36:06,386 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:36:06,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:36:06,386 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:36:06,386 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:36:06,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:36:06,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:36:06,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:36:06,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:36:06,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:36:06,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:36:06,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:36:06,388 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:36:06,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:36:06,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:36:06,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:36:06,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:36:06,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:36:06,389 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:36:06,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:36:06,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:36:06,390 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:36:06,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:36:06,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:36:06,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:36:06,390 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_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 [2022-12-14 10:36:06,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:36:06,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:36:06,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:36:06,599 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:36:06,600 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:36:06,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2022-12-14 10:36:09,257 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:36:09,573 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:36:09,573 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2022-12-14 10:36:09,596 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/data/9c4bc57d2/0451c5588694479dbdaae8ba320a593b/FLAGd2f3e2be6 [2022-12-14 10:36:09,607 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/data/9c4bc57d2/0451c5588694479dbdaae8ba320a593b [2022-12-14 10:36:09,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:36:09,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:36:09,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:36:09,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:36:09,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:36:09,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:36:09" (1/1) ... [2022-12-14 10:36:09,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46296d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:09, skipping insertion in model container [2022-12-14 10:36:09,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:36:09" (1/1) ... [2022-12-14 10:36:09,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:36:09,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:36:09,830 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2022-12-14 10:36:09,835 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2022-12-14 10:36:10,332 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 10:36:10,337 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,337 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,338 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,338 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,339 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,359 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,359 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,361 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,362 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,364 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,364 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,365 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,365 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,422 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:36:10,422 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:36:10,423 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:36:10,426 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 10:36:10,427 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 10:36:10,428 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 10:36:10,660 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 10:36:10,661 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 10:36:10,662 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 10:36:10,663 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 10:36:10,663 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 10:36:10,664 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 10:36:10,665 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 10:36:10,665 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 10:36:10,665 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 10:36:10,666 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 10:36:10,666 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 10:36:10,771 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 10:36:10,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:36:10,810 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:36:10,822 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2022-12-14 10:36:10,822 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2022-12-14 10:36:10,856 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 10:36:10,859 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,859 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,860 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,860 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,861 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,867 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,867 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,868 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,869 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,870 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,870 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,871 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,871 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:36:10,878 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:36:10,878 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:36:10,879 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:36:10,882 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 10:36:10,883 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 10:36:10,884 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 10:36:10,903 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 10:36:10,904 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 10:36:10,905 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 10:36:10,906 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 10:36:10,906 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 10:36:10,907 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 10:36:10,908 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 10:36:10,908 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 10:36:10,909 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 10:36:10,909 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 10:36:10,909 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 10:36:10,928 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 10:36:10,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:36:11,083 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:36:11,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11 WrapperNode [2022-12-14 10:36:11,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:36:11,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:36:11,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:36:11,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:36:11,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,172 INFO L138 Inliner]: procedures = 679, calls = 1045, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 224 [2022-12-14 10:36:11,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:36:11,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:36:11,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:36:11,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:36:11,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,212 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:36:11,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:36:11,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:36:11,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:36:11,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (1/1) ... [2022-12-14 10:36:11,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:36:11,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:36:11,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:36:11,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:36:11,284 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-12-14 10:36:11,284 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-12-14 10:36:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-12-14 10:36:11,285 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-12-14 10:36:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:36:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:36:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 10:36:11,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 10:36:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 10:36:11,285 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 10:36:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 10:36:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 10:36:11,285 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 10:36:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:36:11,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 10:36:11,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:36:11,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:36:11,286 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-12-14 10:36:11,286 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-12-14 10:36:11,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-14 10:36:11,286 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-14 10:36:11,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 10:36:11,286 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 10:36:11,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:36:11,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 10:36:11,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 10:36:11,287 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 10:36:11,287 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 10:36:11,287 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-12-14 10:36:11,287 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-12-14 10:36:11,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:36:11,486 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:36:11,488 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:36:11,761 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:36:11,874 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:36:11,874 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 10:36:11,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:36:11 BoogieIcfgContainer [2022-12-14 10:36:11,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:36:11,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:36:11,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:36:11,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:36:11,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:36:09" (1/3) ... [2022-12-14 10:36:11,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333506a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:36:11, skipping insertion in model container [2022-12-14 10:36:11,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:36:11" (2/3) ... [2022-12-14 10:36:11,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333506a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:36:11, skipping insertion in model container [2022-12-14 10:36:11,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:36:11" (3/3) ... [2022-12-14 10:36:11,885 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_back_harness.i [2022-12-14 10:36:11,901 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:36:11,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:36:11,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:36:11,941 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;@1148393, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:36:11,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:36:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 10:36:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 10:36:11,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:36:11,955 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:36:11,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:36:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:36:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash -53848961, now seen corresponding path program 1 times [2022-12-14 10:36:11,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:36:11,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100002127] [2022-12-14 10:36:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:11,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:36:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 10:36:12,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:36:12,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100002127] [2022-12-14 10:36:12,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100002127] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:36:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000548703] [2022-12-14 10:36:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:12,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:36:12,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:36:12,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:36:12,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:36:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 10:36:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:36:12,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 10:36:12,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 10:36:13,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:13,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:13,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:13,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-12-14 10:36:13,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:13,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:13,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:13,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-12-14 10:36:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 10:36:14,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:36:14,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000548703] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:36:14,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:36:14,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-12-14 10:36:14,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656358650] [2022-12-14 10:36:14,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:36:14,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 10:36:14,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:36:14,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 10:36:14,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:36:14,898 INFO L87 Difference]: Start difference. First operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 10:36:15,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:36:15,992 INFO L93 Difference]: Finished difference Result 245 states and 355 transitions. [2022-12-14 10:36:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:36:15,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 70 [2022-12-14 10:36:15,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:36:16,001 INFO L225 Difference]: With dead ends: 245 [2022-12-14 10:36:16,001 INFO L226 Difference]: Without dead ends: 159 [2022-12-14 10:36:16,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:36:16,005 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 80 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:36:16,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 473 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:36:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-14 10:36:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2022-12-14 10:36:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 81 states have internal predecessors, (95), 60 states have call successors, (60), 17 states have call predecessors, (60), 17 states have return successors, (61), 57 states have call predecessors, (61), 59 states have call successors, (61) [2022-12-14 10:36:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 216 transitions. [2022-12-14 10:36:16,051 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 216 transitions. Word has length 70 [2022-12-14 10:36:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:36:16,052 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 216 transitions. [2022-12-14 10:36:16,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 10:36:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 216 transitions. [2022-12-14 10:36:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:36:16,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:36:16,058 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:36:16,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:36:16,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 10:36:16,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:36:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:36:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1869393802, now seen corresponding path program 1 times [2022-12-14 10:36:16,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:36:16,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18168340] [2022-12-14 10:36:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:16,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:36:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 10:36:16,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:36:16,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18168340] [2022-12-14 10:36:16,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18168340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:36:16,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143909688] [2022-12-14 10:36:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:16,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:36:16,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:36:16,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:36:16,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:36:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:16,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-14 10:36:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:36:16,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:36:16,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 10:36:16,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 10:36:16,911 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 10:36:16,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 10:36:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:16,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:16,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-14 10:36:16,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 10:36:16,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:16,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:16,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-14 10:36:16,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 10:36:17,005 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 10:36:17,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 140 [2022-12-14 10:36:17,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:17,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:17,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 136 treesize of output 124 [2022-12-14 10:36:17,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:17,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-12-14 10:36:17,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 10:36:17,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-12-14 10:36:17,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-12-14 10:36:17,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:17,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:17,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:17,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 44 [2022-12-14 10:36:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 55 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 10:36:19,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:36:22,483 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset| 8)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse1 (+ 16 |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|))) (and (forall ((v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset|) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base| 0))) (let ((.cse2 (+ |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) .cse2) 0))) (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) .cse2) 0))))) (forall ((v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) .cse3) 0)) (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) .cse3))) (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|)) |c_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base|) .cse1) 0)))) is different from false [2022-12-14 10:36:22,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:22,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2022-12-14 10:36:22,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:22,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2022-12-14 10:36:22,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:22,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 426 treesize of output 362 [2022-12-14 10:36:22,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:22,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 319 treesize of output 309 [2022-12-14 10:36:22,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 294 treesize of output 278 [2022-12-14 10:36:22,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 262 treesize of output 254 [2022-12-14 10:36:22,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 294 treesize of output 286 [2022-12-14 10:36:23,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 322 treesize of output 306 [2022-12-14 10:36:23,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-12-14 10:36:23,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-12-14 10:36:23,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 69 [2022-12-14 10:36:23,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,198 INFO L350 Elim1Store]: Elim1 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 67 treesize of output 77 [2022-12-14 10:36:23,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 10:36:23,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 264 [2022-12-14 10:36:23,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 266 treesize of output 250 [2022-12-14 10:36:23,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 87 treesize of output 79 [2022-12-14 10:36:23,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-12-14 10:36:23,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 65 [2022-12-14 10:36:23,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 10:36:23,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 319 [2022-12-14 10:36:23,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 282 treesize of output 274 [2022-12-14 10:36:23,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 322 treesize of output 306 [2022-12-14 10:36:23,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-12-14 10:36:23,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 70 [2022-12-14 10:36:23,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 10:36:23,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:36:23,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 98 [2022-12-14 10:36:23,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 33 treesize of output 29 [2022-12-14 10:36:23,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-12-14 10:36:23,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 61 [2022-12-14 10:36:23,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 10:36:23,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 319 [2022-12-14 10:36:23,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 282 treesize of output 274 [2022-12-14 10:36:23,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 322 treesize of output 306 [2022-12-14 10:36:23,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-12-14 10:36:23,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 70 [2022-12-14 10:36:23,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-12-14 10:36:23,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 61 [2022-12-14 10:36:23,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 192 [2022-12-14 10:36:23,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 152 treesize of output 148 [2022-12-14 10:36:23,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 148 treesize of output 146 [2022-12-14 10:36:23,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:36:23,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:23,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 99 [2022-12-14 10:36:24,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 68 treesize of output 66 [2022-12-14 10:36:24,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-12-14 10:36:24,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-12-14 10:36:24,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:24,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2022-12-14 10:36:24,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:36:24,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 75 [2022-12-14 10:36:24,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143909688] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:36:24,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [987855226] [2022-12-14 10:36:24,506 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-12-14 10:36:24,506 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:36:24,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:36:24,514 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:36:24,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:36:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,602 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:36:24,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 10:36:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 10:36:24,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 10:36:24,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 10:36:24,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 10:36:24,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 10:36:24,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:36:24,959 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 10:36:24,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 10:36:24,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:36:24,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:24,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:36:25,002 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 10:36:25,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 10:36:25,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:36:25,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,100 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 10:36:25,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 10:36:25,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 10:36:25,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 10:36:25,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-12-14 10:36:25,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 10:36:25,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 10:36:25,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 10:36:25,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:36:25,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 10:36:25,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-12-14 10:36:25,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 10:36:25,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:36:25,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 10:36:25,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:25,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:36:27,909 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 109 for LOIs [2022-12-14 10:36:28,111 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 73 for LOIs [2022-12-14 10:36:28,302 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 10:36:28,303 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 10:36:28,327 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:36:33,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [987855226] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:36:33,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:36:33,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [5, 11] total 34 [2022-12-14 10:36:33,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839679465] [2022-12-14 10:36:33,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:36:33,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 10:36:33,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:36:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 10:36:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1490, Unknown=1, NotChecked=78, Total=1722 [2022-12-14 10:36:33,498 INFO L87 Difference]: Start difference. First operand 156 states and 216 transitions. Second operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-12-14 10:36:36,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:36:36,737 INFO L93 Difference]: Finished difference Result 274 states and 370 transitions. [2022-12-14 10:36:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 10:36:36,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) Word has length 71 [2022-12-14 10:36:36,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:36:36,739 INFO L225 Difference]: With dead ends: 274 [2022-12-14 10:36:36,739 INFO L226 Difference]: Without dead ends: 188 [2022-12-14 10:36:36,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 151 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=178, Invalid=1717, Unknown=1, NotChecked=84, Total=1980 [2022-12-14 10:36:36,741 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 93 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:36:36,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 334 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 10:36:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-12-14 10:36:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-12-14 10:36:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 100 states have (on average 1.25) internal successors, (125), 102 states have internal predecessors, (125), 64 states have call successors, (64), 22 states have call predecessors, (64), 21 states have return successors, (63), 61 states have call predecessors, (63), 63 states have call successors, (63) [2022-12-14 10:36:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 252 transitions. [2022-12-14 10:36:36,813 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 252 transitions. Word has length 71 [2022-12-14 10:36:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:36:36,813 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 252 transitions. [2022-12-14 10:36:36,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 11 states have internal predecessors, (20), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-12-14 10:36:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 252 transitions. [2022-12-14 10:36:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 10:36:36,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:36:36,817 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:36:36,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:36:37,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 10:36:37,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:36:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:36:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1341664707, now seen corresponding path program 1 times [2022-12-14 10:36:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:36:37,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8745555] [2022-12-14 10:36:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:37,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:36:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:36:37,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:36:37,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8745555] [2022-12-14 10:36:37,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8745555] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:36:37,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984010659] [2022-12-14 10:36:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:37,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:36:37,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:36:37,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:36:37,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:36:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:37,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:36:37,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:36:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:36:37,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:36:37,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984010659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:36:37,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:36:37,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-12-14 10:36:37,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254706133] [2022-12-14 10:36:37,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:36:37,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:36:37,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:36:37,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:36:37,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:36:37,418 INFO L87 Difference]: Start difference. First operand 186 states and 252 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:36:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:36:37,680 INFO L93 Difference]: Finished difference Result 333 states and 453 transitions. [2022-12-14 10:36:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:36:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 72 [2022-12-14 10:36:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:36:37,682 INFO L225 Difference]: With dead ends: 333 [2022-12-14 10:36:37,682 INFO L226 Difference]: Without dead ends: 196 [2022-12-14 10:36:37,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:36:37,683 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 54 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:36:37,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 504 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:36:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-14 10:36:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 189. [2022-12-14 10:36:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 105 states have internal predecessors, (125), 64 states have call successors, (64), 22 states have call predecessors, (64), 22 states have return successors, (65), 61 states have call predecessors, (65), 63 states have call successors, (65) [2022-12-14 10:36:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 254 transitions. [2022-12-14 10:36:37,724 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 254 transitions. Word has length 72 [2022-12-14 10:36:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:36:37,724 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 254 transitions. [2022-12-14 10:36:37,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:36:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 254 transitions. [2022-12-14 10:36:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 10:36:37,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:36:37,725 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:36:37,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:36:37,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:36:37,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:36:37,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:36:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1924319100, now seen corresponding path program 1 times [2022-12-14 10:36:37,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:36:37,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795052476] [2022-12-14 10:36:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:37,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:36:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:36:38,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:36:38,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795052476] [2022-12-14 10:36:38,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795052476] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:36:38,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279877514] [2022-12-14 10:36:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:38,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:36:38,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:36:38,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:36:38,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:36:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:38,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:36:38,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:36:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:36:38,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:36:38,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279877514] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:36:38,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:36:38,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 10:36:38,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583850688] [2022-12-14 10:36:38,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:36:38,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:36:38,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:36:38,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:36:38,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:36:38,312 INFO L87 Difference]: Start difference. First operand 189 states and 254 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:36:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:36:38,628 INFO L93 Difference]: Finished difference Result 378 states and 519 transitions. [2022-12-14 10:36:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:36:38,629 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 74 [2022-12-14 10:36:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:36:38,632 INFO L225 Difference]: With dead ends: 378 [2022-12-14 10:36:38,632 INFO L226 Difference]: Without dead ends: 236 [2022-12-14 10:36:38,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:36:38,634 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 85 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:36:38,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 585 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:36:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-12-14 10:36:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 193. [2022-12-14 10:36:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 106 states have (on average 1.2264150943396226) internal successors, (130), 109 states have internal predecessors, (130), 64 states have call successors, (64), 22 states have call predecessors, (64), 22 states have return successors, (65), 61 states have call predecessors, (65), 63 states have call successors, (65) [2022-12-14 10:36:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 259 transitions. [2022-12-14 10:36:38,712 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 259 transitions. Word has length 74 [2022-12-14 10:36:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:36:38,712 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 259 transitions. [2022-12-14 10:36:38,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:36:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 259 transitions. [2022-12-14 10:36:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 10:36:38,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:36:38,714 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:36:38,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:36:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:36:38,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:36:38,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:36:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash -915652434, now seen corresponding path program 1 times [2022-12-14 10:36:38,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:36:38,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722796713] [2022-12-14 10:36:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:38,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:36:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:36:39,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:36:39,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722796713] [2022-12-14 10:36:39,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722796713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:36:39,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427822643] [2022-12-14 10:36:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:39,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:36:39,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:36:39,253 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:36:39,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:36:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:39,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:36:39,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:36:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 10:36:39,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:36:39,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427822643] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:36:39,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:36:39,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 10:36:39,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123473317] [2022-12-14 10:36:39,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:36:39,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:36:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:36:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:36:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:36:39,410 INFO L87 Difference]: Start difference. First operand 193 states and 259 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 10:36:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:36:39,516 INFO L93 Difference]: Finished difference Result 366 states and 504 transitions. [2022-12-14 10:36:39,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:36:39,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 75 [2022-12-14 10:36:39,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:36:39,519 INFO L225 Difference]: With dead ends: 366 [2022-12-14 10:36:39,519 INFO L226 Difference]: Without dead ends: 222 [2022-12-14 10:36:39,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:36:39,520 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 6 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:36:39,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 225 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:36:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-12-14 10:36:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 198. [2022-12-14 10:36:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 114 states have internal predecessors, (136), 64 states have call successors, (64), 22 states have call predecessors, (64), 22 states have return successors, (65), 61 states have call predecessors, (65), 63 states have call successors, (65) [2022-12-14 10:36:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 265 transitions. [2022-12-14 10:36:39,575 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 265 transitions. Word has length 75 [2022-12-14 10:36:39,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:36:39,575 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 265 transitions. [2022-12-14 10:36:39,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 10:36:39,576 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 265 transitions. [2022-12-14 10:36:39,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 10:36:39,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:36:39,576 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:36:39,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 10:36:39,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:36:39,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:36:39,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:36:39,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1617287136, now seen corresponding path program 1 times [2022-12-14 10:36:39,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:36:39,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157549369] [2022-12-14 10:36:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:39,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:36:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 10:36:39,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:36:39,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157549369] [2022-12-14 10:36:39,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157549369] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:36:39,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902241659] [2022-12-14 10:36:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:39,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:36:39,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:36:39,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:36:39,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:36:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:40,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 10:36:40,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:36:40,208 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-12-14 10:36:40,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-12-14 10:36:40,221 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:36:40,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 10:36:40,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 10:36:40,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 10:36:40,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2022-12-14 10:36:40,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-12-14 10:36:51,554 WARN L233 SmtUtils]: Spent 7.70s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:36:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 10:36:54,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:36:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 10:36:57,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902241659] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:36:57,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258201732] [2022-12-14 10:36:57,515 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-12-14 10:36:57,515 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:36:57,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:36:57,515 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:36:57,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:36:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,556 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 10:36:57,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 10:36:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,593 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:36:57,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 10:36:57,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 10:36:57,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 10:36:57,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 10:36:57,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 10:36:57,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 10:36:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-12-14 10:36:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:36:57,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:57,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-12-14 10:36:58,181 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 130 for LOIs [2022-12-14 10:36:58,335 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 10:36:58,336 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 10:36:58,348 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:37:01,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1258201732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:01,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:37:01,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 15, 8] total 36 [2022-12-14 10:37:01,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132640282] [2022-12-14 10:37:01,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:01,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:37:01,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:01,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:37:01,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1098, Unknown=1, NotChecked=0, Total=1260 [2022-12-14 10:37:01,823 INFO L87 Difference]: Start difference. First operand 198 states and 265 transitions. Second operand has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 10:37:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:03,939 INFO L93 Difference]: Finished difference Result 263 states and 343 transitions. [2022-12-14 10:37:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:37:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 78 [2022-12-14 10:37:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:03,940 INFO L225 Difference]: With dead ends: 263 [2022-12-14 10:37:03,940 INFO L226 Difference]: Without dead ends: 124 [2022-12-14 10:37:03,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 180 SyntacticMatches, 24 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=167, Invalid=1164, Unknown=1, NotChecked=0, Total=1332 [2022-12-14 10:37:03,941 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 117 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:03,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 321 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 10:37:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-12-14 10:37:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-12-14 10:37:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 71 states have internal predecessors, (83), 39 states have call successors, (39), 13 states have call predecessors, (39), 14 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2022-12-14 10:37:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 162 transitions. [2022-12-14 10:37:03,961 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 162 transitions. Word has length 78 [2022-12-14 10:37:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:03,961 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 162 transitions. [2022-12-14 10:37:03,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 10:37:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 162 transitions. [2022-12-14 10:37:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 10:37:03,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:03,962 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:37:03,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:37:04,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 10:37:04,164 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:04,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:04,165 INFO L85 PathProgramCache]: Analyzing trace with hash 306134295, now seen corresponding path program 1 times [2022-12-14 10:37:04,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:04,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115279002] [2022-12-14 10:37:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:04,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 10:37:04,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115279002] [2022-12-14 10:37:04,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115279002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:37:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016610555] [2022-12-14 10:37:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:04,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:37:04,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:37:04,359 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:37:04,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:37:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:04,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-14 10:37:04,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:37:04,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:37:04,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 10:37:04,685 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:37:04,685 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 10:37:04,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-12-14 10:37:04,697 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 10:37:04,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 10:37:04,746 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 10:37:04,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 114 [2022-12-14 10:37:04,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:04,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 110 treesize of output 90 [2022-12-14 10:37:04,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-12-14 10:37:04,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 10:37:04,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-12-14 10:37:04,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-12-14 10:37:15,436 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:37:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 10:37:20,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:37:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 10:37:23,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016610555] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:37:23,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571012838] [2022-12-14 10:37:23,133 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-12-14 10:37:23,133 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:37:23,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:37:23,134 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:37:23,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:37:23,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,185 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:37:23,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 10:37:23,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 10:37:23,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 10:37:23,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 10:37:23,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 10:37:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 10:37:23,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:37:23,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:37:23,449 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 10:37:23,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 10:37:23,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:37:23,481 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 10:37:23,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 10:37:23,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 10:37:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,563 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 10:37:23,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 10:37:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:37:23,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 10:37:23,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-12-14 10:37:23,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-12-14 10:37:23,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:37:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 10:37:23,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 10:37:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 10:37:23,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 10:37:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 10:37:23,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 10:37:23,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:37:23,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:23,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:37:26,407 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 109 for LOIs [2022-12-14 10:37:26,634 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 73 for LOIs [2022-12-14 10:37:26,925 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 10:37:26,926 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 10:37:26,940 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-12-14 10:37:26,988 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:37:34,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [571012838] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:37:34,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:37:34,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [6, 18, 8] total 55 [2022-12-14 10:37:34,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615008561] [2022-12-14 10:37:34,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:37:34,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 10:37:34,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:37:34,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 10:37:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2743, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 10:37:34,574 INFO L87 Difference]: Start difference. First operand 123 states and 162 transitions. Second operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 16 states have internal predecessors, (27), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-12-14 10:37:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:37:38,376 INFO L93 Difference]: Finished difference Result 218 states and 288 transitions. [2022-12-14 10:37:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 10:37:38,376 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 20 states have (on average 1.35) internal successors, (27), 16 states have internal predecessors, (27), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 79 [2022-12-14 10:37:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:37:38,377 INFO L225 Difference]: With dead ends: 218 [2022-12-14 10:37:38,377 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 10:37:38,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 162 SyntacticMatches, 26 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=280, Invalid=3260, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 10:37:38,379 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 107 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:37:38,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 352 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 10:37:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 10:37:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-12-14 10:37:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 73 states have internal predecessors, (85), 40 states have call successors, (40), 14 states have call predecessors, (40), 15 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-12-14 10:37:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2022-12-14 10:37:38,407 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 79 [2022-12-14 10:37:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:37:38,408 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2022-12-14 10:37:38,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 20 states have (on average 1.35) internal successors, (27), 16 states have internal predecessors, (27), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-12-14 10:37:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2022-12-14 10:37:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 10:37:38,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:37:38,409 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:37:38,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 10:37:38,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 10:37:38,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:37:38,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:37:38,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1082961456, now seen corresponding path program 1 times [2022-12-14 10:37:38,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:37:38,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050006178] [2022-12-14 10:37:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:38,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:37:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 10:37:38,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:37:38,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050006178] [2022-12-14 10:37:38,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050006178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:37:38,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661520852] [2022-12-14 10:37:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:37:38,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:37:38,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:37:38,786 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:37:38,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:37:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:37:38,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 87 conjunts are in the unsatisfiable core [2022-12-14 10:37:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:37:39,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:37:39,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 10:37:39,145 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:37:39,145 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 10:37:39,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-12-14 10:37:39,158 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 10:37:39,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 10:37:39,201 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-12-14 10:37:39,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 99 [2022-12-14 10:37:39,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:39,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 85 treesize of output 71 [2022-12-14 10:37:39,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 10:37:39,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 23 [2022-12-14 10:37:39,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-12-14 10:37:53,463 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-12-14 10:37:53,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 1 [2022-12-14 10:37:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 10:37:53,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:37:54,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:37:54,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2022-12-14 10:37:54,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:37:54,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 156 [2022-12-14 10:37:54,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 144 treesize of output 140 [2022-12-14 10:37:54,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 140 treesize of output 138 [2022-12-14 10:37:54,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-12-14 10:37:54,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 22 [2022-12-14 10:37:54,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:37:54,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-12-14 10:37:58,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661520852] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:37:58,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595907549] [2022-12-14 10:37:58,705 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-12-14 10:37:58,705 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:37:58,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:37:58,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:37:58,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:37:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,746 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:37:58,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 10:37:58,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 10:37:58,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 10:37:58,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 10:37:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 10:37:58,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:58,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 10:37:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:37:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,072 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 10:37:59,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-12-14 10:37:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 10:37:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:37:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:37:59,139 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 10:37:59,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 10:37:59,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:37:59,180 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 10:37:59,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 10:37:59,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,243 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 10:37:59,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 10:37:59,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-12-14 10:37:59,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-12-14 10:37:59,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:37:59,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 10:37:59,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 10:37:59,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 10:37:59,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 10:37:59,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 10:37:59,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 10:37:59,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:37:59,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:37:59,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:38:02,196 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 109 for LOIs [2022-12-14 10:38:02,432 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 96 for LOIs [2022-12-14 10:38:03,107 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 10:38:03,108 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 10:38:03,123 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 10:38:03,170 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:38:10,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [595907549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:38:10,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:38:10,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [7, 13] total 45 [2022-12-14 10:38:10,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306844363] [2022-12-14 10:38:10,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:38:10,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 10:38:10,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:38:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 10:38:10,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2736, Unknown=15, NotChecked=0, Total=2970 [2022-12-14 10:38:10,227 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 28 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 9 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-12-14 10:38:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:38:15,511 INFO L93 Difference]: Finished difference Result 222 states and 291 transitions. [2022-12-14 10:38:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 10:38:15,512 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 9 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 81 [2022-12-14 10:38:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:38:15,513 INFO L225 Difference]: With dead ends: 222 [2022-12-14 10:38:15,513 INFO L226 Difference]: Without dead ends: 130 [2022-12-14 10:38:15,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 173 SyntacticMatches, 16 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=319, Invalid=3572, Unknown=15, NotChecked=0, Total=3906 [2022-12-14 10:38:15,514 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 100 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:38:15,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 388 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 10:38:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-14 10:38:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-12-14 10:38:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 40 states have call successors, (40), 14 states have call predecessors, (40), 15 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-12-14 10:38:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2022-12-14 10:38:15,537 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 81 [2022-12-14 10:38:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:38:15,537 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2022-12-14 10:38:15,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 9 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-12-14 10:38:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2022-12-14 10:38:15,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 10:38:15,538 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:38:15,538 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 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] [2022-12-14 10:38:15,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:38:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:38:15,740 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:38:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:38:15,741 INFO L85 PathProgramCache]: Analyzing trace with hash 347930842, now seen corresponding path program 1 times [2022-12-14 10:38:15,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:38:15,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476640873] [2022-12-14 10:38:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:38:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 10:38:15,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:38:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476640873] [2022-12-14 10:38:15,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476640873] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:38:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531706829] [2022-12-14 10:38:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:15,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:38:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:38:15,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:38:15,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:38:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:16,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 10:38:16,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:38:16,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:38:16,250 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 10:38:16,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 10:38:16,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 10:38:16,256 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-14 10:38:16,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:16,276 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 21 [2022-12-14 10:38:16,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:16,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 20 [2022-12-14 10:38:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 10:38:16,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:38:16,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:38:16,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 10:38:16,865 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:38:16,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-12-14 10:38:16,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 148 treesize of output 144 [2022-12-14 10:38:16,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 144 treesize of output 142 [2022-12-14 10:38:16,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-12-14 10:38:16,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:38:16,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 65 [2022-12-14 10:38:16,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 48 treesize of output 46 [2022-12-14 10:38:16,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:38:16,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-12-14 10:38:16,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:38:16,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2022-12-14 10:38:17,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531706829] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:38:17,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [796756542] [2022-12-14 10:38:17,287 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-12-14 10:38:17,288 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:38:17,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:38:17,288 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:38:17,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:38:17,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,328 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 10:38:17,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 10:38:17,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 10:38:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 10:38:17,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 10:38:17,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 10:38:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-12-14 10:38:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:38:17,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:38:17,598 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 10:38:17,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 10:38:17,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:38:17,636 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 10:38:17,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-12-14 10:38:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,693 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 10:38:17,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-12-14 10:38:17,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 10:38:17,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 10:38:17,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:38:17,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-12-14 10:38:17,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:38:17,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 10:38:17,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 10:38:17,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 10:38:17,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 10:38:17,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-12-14 10:38:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 10:38:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:38:17,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 10:38:17,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:17,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 10:38:25,973 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 19 for LOIs [2022-12-14 10:38:25,991 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-12-14 10:38:26,017 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 10:38:26,525 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 10:38:26,526 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 10:38:26,538 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 10:38:26,589 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:38:45,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9051#(and (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96| Int)) (and (<= 0 (ite (= (ite (and (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96|) 0))) 1 0) 0) 0 1)) (<= 0 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96|) (not (= (mod (ite (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96| 0) 0 1) 256) 0)) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96|) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= (ite (= (ite (and (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_96|) 0))) 1 0) 0) 0 1) 1))) (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_123| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_123| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_123|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_123| 24)) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_123|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_123| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_123|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_123| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_123|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_123|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_123| 24))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_123| 0) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_123| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_123|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_123| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_123|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_123| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_123|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_123|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:38:45,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:38:45,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:38:45,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13] total 17 [2022-12-14 10:38:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015177388] [2022-12-14 10:38:45,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:38:45,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:38:45,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:38:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:38:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=3631, Unknown=7, NotChecked=0, Total=3906 [2022-12-14 10:38:45,674 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2022-12-14 10:38:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:38:47,157 INFO L93 Difference]: Finished difference Result 278 states and 364 transitions. [2022-12-14 10:38:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:38:47,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) Word has length 82 [2022-12-14 10:38:47,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:38:47,159 INFO L225 Difference]: With dead ends: 278 [2022-12-14 10:38:47,159 INFO L226 Difference]: Without dead ends: 181 [2022-12-14 10:38:47,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 169 SyntacticMatches, 18 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=399, Invalid=5293, Unknown=8, NotChecked=0, Total=5700 [2022-12-14 10:38:47,163 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 201 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:38:47,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 671 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:38:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-12-14 10:38:47,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 148. [2022-12-14 10:38:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 87 states have (on average 1.206896551724138) internal successors, (105), 89 states have internal predecessors, (105), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-12-14 10:38:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2022-12-14 10:38:47,191 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 82 [2022-12-14 10:38:47,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:38:47,191 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2022-12-14 10:38:47,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2022-12-14 10:38:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2022-12-14 10:38:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 10:38:47,192 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:38:47,192 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 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] [2022-12-14 10:38:47,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:38:47,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:38:47,394 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:38:47,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:38:47,395 INFO L85 PathProgramCache]: Analyzing trace with hash 612279792, now seen corresponding path program 1 times [2022-12-14 10:38:47,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:38:47,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479067521] [2022-12-14 10:38:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:47,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:38:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 10:38:47,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:38:47,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479067521] [2022-12-14 10:38:47,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479067521] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:38:47,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745083717] [2022-12-14 10:38:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:47,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:38:47,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:38:47,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:38:47,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:38:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:47,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:38:47,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:38:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 10:38:47,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:38:47,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745083717] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:38:47,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:38:47,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 10:38:47,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164014975] [2022-12-14 10:38:47,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:38:47,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:38:47,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:38:47,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:38:47,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:38:47,818 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 10:38:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:38:48,012 INFO L93 Difference]: Finished difference Result 257 states and 327 transitions. [2022-12-14 10:38:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:38:48,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 87 [2022-12-14 10:38:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:38:48,013 INFO L225 Difference]: With dead ends: 257 [2022-12-14 10:38:48,013 INFO L226 Difference]: Without dead ends: 150 [2022-12-14 10:38:48,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:38:48,014 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 59 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:38:48,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 573 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:38:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-14 10:38:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2022-12-14 10:38:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 89 states have internal predecessors, (104), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-12-14 10:38:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 186 transitions. [2022-12-14 10:38:48,041 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 186 transitions. Word has length 87 [2022-12-14 10:38:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:38:48,041 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 186 transitions. [2022-12-14 10:38:48,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 10:38:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 186 transitions. [2022-12-14 10:38:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 10:38:48,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:38:48,042 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 2, 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] [2022-12-14 10:38:48,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 10:38:48,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 10:38:48,244 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:38:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:38:48,245 INFO L85 PathProgramCache]: Analyzing trace with hash 229903191, now seen corresponding path program 1 times [2022-12-14 10:38:48,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:38:48,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693825391] [2022-12-14 10:38:48,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:48,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:38:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 10:38:48,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:38:48,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693825391] [2022-12-14 10:38:48,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693825391] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:38:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98886207] [2022-12-14 10:38:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:48,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:38:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:38:48,483 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:38:48,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:38:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:48,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:38:48,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:38:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 10:38:48,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:38:48,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98886207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:38:48,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:38:48,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-12-14 10:38:48,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833300446] [2022-12-14 10:38:48,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:38:48,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 10:38:48,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:38:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 10:38:48,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:38:48,695 INFO L87 Difference]: Start difference. First operand 148 states and 186 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 10:38:48,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:38:48,951 INFO L93 Difference]: Finished difference Result 273 states and 347 transitions. [2022-12-14 10:38:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:38:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2022-12-14 10:38:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:38:48,952 INFO L225 Difference]: With dead ends: 273 [2022-12-14 10:38:48,952 INFO L226 Difference]: Without dead ends: 165 [2022-12-14 10:38:48,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:38:48,953 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 74 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:38:48,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 667 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:38:48,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-14 10:38:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-12-14 10:38:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 89 states have internal predecessors, (103), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-12-14 10:38:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 185 transitions. [2022-12-14 10:38:48,981 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 185 transitions. Word has length 89 [2022-12-14 10:38:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:38:48,981 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 185 transitions. [2022-12-14 10:38:48,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 10:38:48,981 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 185 transitions. [2022-12-14 10:38:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 10:38:48,982 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:38:48,982 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:38:48,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 10:38:49,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 10:38:49,183 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:38:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:38:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2142124211, now seen corresponding path program 1 times [2022-12-14 10:38:49,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:38:49,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137503119] [2022-12-14 10:38:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:38:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-12-14 10:38:49,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:38:49,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137503119] [2022-12-14 10:38:49,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137503119] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:38:49,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366700654] [2022-12-14 10:38:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:38:49,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:38:49,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:38:49,331 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:38:49,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:38:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:38:49,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 107 conjunts are in the unsatisfiable core [2022-12-14 10:38:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:38:49,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:38:49,663 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 10:38:49,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 10:38:49,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 10:38:49,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:38:49,705 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 10:38:49,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 103 [2022-12-14 10:38:49,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:38:49,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 99 treesize of output 81 [2022-12-14 10:38:49,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-12-14 10:38:49,775 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|))) (let ((.cse0 (select .cse1 0))) (and (= .cse0 (select v_DerPreprocessor_40 24)) (not (= .cse0 0)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| v_DerPreprocessor_40) .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| v_DerPreprocessor_40) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select .cse1 24)))))) is different from true [2022-12-14 10:38:49,925 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_41 (Array Int Int)) (v_DerPreprocessor_42 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|))) (let ((.cse0 (select .cse1 0))) (and (not (= .cse0 0)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|) (= .cse0 (select v_DerPreprocessor_41 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_42) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| v_DerPreprocessor_41) .cse0 v_DerPreprocessor_42) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| v_DerPreprocessor_41) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select .cse1 24)))))) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| Int)) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|))) (let ((.cse3 (select .cse2 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|) (= (select .cse2 24) .cse3) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| v_DerPreprocessor_40) .cse3 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| v_DerPreprocessor_40) .cse3) (select |c_#memory_$Pointer$.base| .cse3)) (not (= .cse3 0)) (= .cse3 (select v_DerPreprocessor_40 24)) (not (= .cse3 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|))))))) is different from true [2022-12-14 10:38:50,271 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_41 (Array Int Int)) (v_DerPreprocessor_42 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|))) (let ((.cse0 (select .cse1 0))) (and (not (= .cse0 0)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|) (= .cse0 (select v_DerPreprocessor_41 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_42) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| v_DerPreprocessor_41) .cse0 v_DerPreprocessor_42) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| v_DerPreprocessor_41) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select .cse1 24)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175| Int) (v_DerPreprocessor_43 (Array Int Int)) (v_DerPreprocessor_44 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175|))) (let ((.cse2 (select .cse3 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175|) (not (= .cse2 0)) (= .cse2 (select .cse3 24)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175|)) (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_44) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175| v_DerPreprocessor_43) .cse2 v_DerPreprocessor_44) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175| v_DerPreprocessor_43) .cse2)) (= .cse2 (select v_DerPreprocessor_43 24)))))) (exists ((v_DerPreprocessor_40 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114| Int) (v_DerPreprocessor_39 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114|))) (let ((.cse4 (select .cse5 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114|) (not (= .cse4 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114|)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114| v_DerPreprocessor_40) .cse4 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114| v_DerPreprocessor_40) .cse4) (select |c_#memory_$Pointer$.base| .cse4)) (= .cse4 (select .cse5 24)) (not (= .cse4 0)) (= .cse4 (select v_DerPreprocessor_40 24)))))) (exists ((v_DerPreprocessor_45 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| Int) (v_DerPreprocessor_46 (Array Int Int))) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|))) (let ((.cse6 (select .cse7 0))) (and (= (select |c_#memory_$Pointer$.base| .cse6) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_46) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| v_DerPreprocessor_45) .cse6 v_DerPreprocessor_46) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| v_DerPreprocessor_45) .cse6)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|) (= (select .cse7 24) .cse6) (not (= .cse6 0)) (not (= .cse6 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|)) (= .cse6 (select v_DerPreprocessor_45 24))))))) is different from true [2022-12-14 10:38:50,766 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_41 (Array Int Int)) (v_DerPreprocessor_42 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|))) (let ((.cse0 (select .cse1 0))) (and (not (= .cse0 0)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|) (= .cse0 (select v_DerPreprocessor_41 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_42) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| v_DerPreprocessor_41) .cse0 v_DerPreprocessor_42) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| v_DerPreprocessor_41) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select .cse1 24)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175| Int) (v_DerPreprocessor_43 (Array Int Int)) (v_DerPreprocessor_44 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175|))) (let ((.cse2 (select .cse3 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175|) (not (= .cse2 0)) (= .cse2 (select .cse3 24)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175|)) (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_44) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175| v_DerPreprocessor_43) .cse2 v_DerPreprocessor_44) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175| v_DerPreprocessor_43) .cse2)) (= .cse2 (select v_DerPreprocessor_43 24)))))) (exists ((v_DerPreprocessor_45 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| Int) (v_DerPreprocessor_46 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|))) (let ((.cse4 (select .cse5 0))) (and (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_46) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| v_DerPreprocessor_45) .cse4 v_DerPreprocessor_46) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| v_DerPreprocessor_45) .cse4)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|) (= (select .cse5 24) .cse4) (not (= .cse4 0)) (not (= .cse4 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|)) (= .cse4 (select v_DerPreprocessor_45 24)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114| Int) (v_DerPreprocessor_48 (Array Int Int)) (v_DerPreprocessor_47 (Array Int Int))) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114|))) (let ((.cse6 (select .cse7 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_48) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114| v_DerPreprocessor_47) .cse6 v_DerPreprocessor_48) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114| v_DerPreprocessor_47) .cse6) (select |c_#memory_$Pointer$.base| .cse6)) (not (= .cse6 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114|)) (= .cse6 (select v_DerPreprocessor_47 24)) (= .cse6 (select .cse7 24)) (not (= .cse6 0)))))) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115| Int)) (let ((.cse8 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115|))) (let ((.cse9 (select .cse8 0))) (and (= (select .cse8 24) .cse9) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse9 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115| v_DerPreprocessor_40) .cse9 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115| v_DerPreprocessor_40) .cse9) (select |c_#memory_$Pointer$.base| .cse9)) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115| .cse9)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115|) (= (select v_DerPreprocessor_40 24) .cse9) (not (= .cse9 0))))))) is different from true [2022-12-14 10:38:51,257 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_41 (Array Int Int)) (v_DerPreprocessor_42 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|))) (let ((.cse0 (select .cse1 0))) (and (not (= .cse0 0)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173|) (= .cse0 (select v_DerPreprocessor_41 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_42) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| v_DerPreprocessor_41) .cse0 v_DerPreprocessor_42) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_173| v_DerPreprocessor_41) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select .cse1 24)))))) (exists ((v_DerPreprocessor_40 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_117| Int) (v_DerPreprocessor_39 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_117|))) (let ((.cse2 (select .cse3 0))) (and (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_117|)) (= .cse2 (select .cse3 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_117|) (= (select v_DerPreprocessor_40 24) .cse2) (not (= .cse2 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_117| v_DerPreprocessor_40) .cse2 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_117| v_DerPreprocessor_40) .cse2) (select |c_#memory_$Pointer$.base| .cse2)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175| Int) (v_DerPreprocessor_43 (Array Int Int)) (v_DerPreprocessor_44 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175|))) (let ((.cse4 (select .cse5 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175|) (not (= .cse4 0)) (= .cse4 (select .cse5 24)) (not (= .cse4 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175|)) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_44) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175| v_DerPreprocessor_43) .cse4 v_DerPreprocessor_44) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_175| v_DerPreprocessor_43) .cse4)) (= .cse4 (select v_DerPreprocessor_43 24)))))) (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_116| Int)) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_116|))) (let ((.cse6 (select .cse7 0))) (and (not (= .cse6 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_116|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_116|) (= (select |c_#memory_$Pointer$.base| .cse6) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_50) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_116| v_DerPreprocessor_49) .cse6 v_DerPreprocessor_50) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_116| v_DerPreprocessor_49) .cse6)) (not (= .cse6 0)) (= (select v_DerPreprocessor_49 24) .cse6) (= (select .cse7 24) .cse6))))) (exists ((v_DerPreprocessor_45 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| Int) (v_DerPreprocessor_46 (Array Int Int))) (let ((.cse9 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|))) (let ((.cse8 (select .cse9 0))) (and (= (select |c_#memory_$Pointer$.base| .cse8) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse8 v_DerPreprocessor_46) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| v_DerPreprocessor_45) .cse8 v_DerPreprocessor_46) |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174| v_DerPreprocessor_45) .cse8)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|) (= (select .cse9 24) .cse8) (not (= .cse8 0)) (not (= .cse8 |v_ULTIMATE.start_aws_linked_list_pop_back_harness_~#list~0#1.base_BEFORE_CALL_174|)) (= .cse8 (select v_DerPreprocessor_45 24)))))) (exists ((v_DerPreprocessor_51 (Array Int Int)) (v_DerPreprocessor_52 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115| Int)) (let ((.cse10 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115|))) (let ((.cse11 (select .cse10 0))) (and (= (select .cse10 24) .cse11) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse11 v_DerPreprocessor_52) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115| v_DerPreprocessor_51) .cse11 v_DerPreprocessor_52) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115| v_DerPreprocessor_51) .cse11) (select |c_#memory_$Pointer$.base| .cse11)) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115| .cse11)) (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_115|) (not (= .cse11 0)) (= .cse11 (select v_DerPreprocessor_51 24)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114| Int) (v_DerPreprocessor_48 (Array Int Int)) (v_DerPreprocessor_47 (Array Int Int))) (let ((.cse13 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114|))) (let ((.cse12 (select .cse13 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse12 v_DerPreprocessor_48) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114| v_DerPreprocessor_47) .cse12 v_DerPreprocessor_48) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114| v_DerPreprocessor_47) .cse12) (select |c_#memory_$Pointer$.base| .cse12)) (not (= .cse12 |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_114|)) (= .cse12 (select v_DerPreprocessor_47 24)) (= .cse12 (select .cse13 24)) (not (= .cse12 0))))))) is different from true [2022-12-14 10:39:52,042 WARN L233 SmtUtils]: Spent 42.12s on a formula simplification that was a NOOP. DAG size: 229 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:40:41,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-12-14 10:40:41,586 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-12-14 10:40:41,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-12-14 10:40:41,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508568240] [2022-12-14 10:40:41,588 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-12-14 10:40:41,588 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:40:41,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:40:41,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:40:41,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:40:41,594 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:273) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 44 more [2022-12-14 10:40:41,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:40:41,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2022-12-14 10:40:41,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147193627] [2022-12-14 10:40:41,595 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:40:41,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:40:41,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:40:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:40:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=20, NotChecked=220, Total=702 [2022-12-14 10:40:41,596 INFO L87 Difference]: Start difference. First operand 148 states and 185 transitions. Second operand has 6 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 10:40:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 10:40:41,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 89.7s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=20, NotChecked=220, Total=702 [2022-12-14 10:40:41,597 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:40:41,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:40:41,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 10:40:41,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:40:41,799 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2e096f91 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:460) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:104) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 10:40:41,806 INFO L158 Benchmark]: Toolchain (without parser) took 272195.77ms. Allocated memory was 134.2MB in the beginning and 490.7MB in the end (delta: 356.5MB). Free memory was 91.7MB in the beginning and 208.9MB in the end (delta: -117.3MB). Peak memory consumption was 242.1MB. Max. memory is 16.1GB. [2022-12-14 10:40:41,806 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 111.1MB. Free memory is still 85.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:40:41,807 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1473.68ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 91.7MB in the beginning and 109.8MB in the end (delta: -18.2MB). Peak memory consumption was 59.7MB. Max. memory is 16.1GB. [2022-12-14 10:40:41,807 INFO L158 Benchmark]: Boogie Procedure Inliner took 87.50ms. Allocated memory is still 161.5MB. Free memory was 109.8MB in the beginning and 104.5MB in the end (delta: 5.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 10:40:41,808 INFO L158 Benchmark]: Boogie Preprocessor took 47.88ms. Allocated memory is still 161.5MB. Free memory was 104.5MB in the beginning and 100.5MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 10:40:41,809 INFO L158 Benchmark]: RCFGBuilder took 655.33ms. Allocated memory is still 161.5MB. Free memory was 100.5MB in the beginning and 96.7MB in the end (delta: 3.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-12-14 10:40:41,809 INFO L158 Benchmark]: TraceAbstraction took 269926.07ms. Allocated memory was 161.5MB in the beginning and 490.7MB in the end (delta: 329.3MB). Free memory was 96.7MB in the beginning and 208.9MB in the end (delta: -112.2MB). Peak memory consumption was 218.6MB. Max. memory is 16.1GB. [2022-12-14 10:40:41,812 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 111.1MB. Free memory is still 85.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1473.68ms. Allocated memory was 134.2MB in the beginning and 161.5MB in the end (delta: 27.3MB). Free memory was 91.7MB in the beginning and 109.8MB in the end (delta: -18.2MB). Peak memory consumption was 59.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 87.50ms. Allocated memory is still 161.5MB. Free memory was 109.8MB in the beginning and 104.5MB in the end (delta: 5.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.88ms. Allocated memory is still 161.5MB. Free memory was 104.5MB in the beginning and 100.5MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 655.33ms. Allocated memory is still 161.5MB. Free memory was 100.5MB in the beginning and 96.7MB in the end (delta: 3.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * TraceAbstraction took 269926.07ms. Allocated memory was 161.5MB in the beginning and 490.7MB in the end (delta: 329.3MB). Free memory was 96.7MB in the beginning and 208.9MB in the end (delta: -112.2MB). Peak memory consumption was 218.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2e096f91 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2e096f91: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:40:43,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:40:43,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:40:43,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:40:43,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:40:43,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:40:43,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:40:43,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:40:43,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:40:43,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:40:43,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:40:43,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:40:43,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:40:43,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:40:43,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:40:43,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:40:43,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:40:43,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:40:43,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:40:43,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:40:43,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:40:43,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:40:43,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:40:43,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:40:43,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:40:43,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:40:43,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:40:43,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:40:43,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:40:43,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:40:43,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:40:43,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:40:43,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:40:43,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:40:43,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:40:43,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:40:43,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:40:43,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:40:43,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:40:43,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:40:43,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:40:43,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-12-14 10:40:43,253 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:40:43,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:40:43,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:40:43,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:40:43,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:40:43,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:40:43,254 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:40:43,255 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:40:43,255 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:40:43,255 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:40:43,255 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:40:43,255 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:40:43,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:40:43,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:40:43,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:40:43,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:40:43,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:40:43,256 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:40:43,256 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 10:40:43,256 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 10:40:43,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:40:43,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:40:43,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:40:43,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:40:43,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 10:40:43,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:40:43,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:40:43,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:40:43,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:40:43,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:40:43,258 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 10:40:43,258 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 10:40:43,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:40:43,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:40:43,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 10:40:43,258 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbdd24aa3539f554995115754c17957131f4a70e9c01f3bd768b3e606eed4d4 [2022-12-14 10:40:43,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:40:43,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:40:43,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:40:43,506 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:40:43,506 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:40:43,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2022-12-14 10:40:46,044 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:40:46,375 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:40:46,376 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i [2022-12-14 10:40:46,400 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/data/548036e4b/d8dd78b4623840aea8a1584e31cd96b5/FLAG304e94435 [2022-12-14 10:40:46,412 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/data/548036e4b/d8dd78b4623840aea8a1584e31cd96b5 [2022-12-14 10:40:46,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:40:46,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:40:46,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:40:46,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:40:46,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:40:46,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:40:46" (1/1) ... [2022-12-14 10:40:46,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d06d837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:46, skipping insertion in model container [2022-12-14 10:40:46,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:40:46" (1/1) ... [2022-12-14 10:40:46,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:40:46,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:40:46,700 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2022-12-14 10:40:46,705 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2022-12-14 10:40:47,225 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 10:40:47,229 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,229 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,229 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,230 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,230 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,239 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,239 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,247 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,247 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,249 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,250 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,251 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,251 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,298 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:40:47,299 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:40:47,299 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:40:47,303 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 10:40:47,304 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 10:40:47,304 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 10:40:47,500 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 10:40:47,501 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 10:40:47,502 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 10:40:47,503 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 10:40:47,504 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 10:40:47,504 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 10:40:47,505 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 10:40:47,505 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 10:40:47,506 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 10:40:47,506 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 10:40:47,507 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 10:40:47,611 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 10:40:47,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:40:47,648 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 10:40:47,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:40:47,668 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2022-12-14 10:40:47,668 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2022-12-14 10:40:47,690 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 10:40:47,692 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,693 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,693 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,693 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,694 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,698 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,698 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,699 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,699 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,700 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,701 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,701 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,701 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,706 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:40:47,707 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:40:47,707 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:40:47,709 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 10:40:47,710 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 10:40:47,710 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 10:40:47,734 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 10:40:47,735 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 10:40:47,736 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 10:40:47,737 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 10:40:47,737 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 10:40:47,738 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 10:40:47,739 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 10:40:47,739 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 10:40:47,740 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 10:40:47,740 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 10:40:47,741 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 10:40:47,762 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 10:40:47,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:40:47,784 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:40:47,794 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4498,4511] [2022-12-14 10:40:47,794 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_back_harness.i[4558,4571] [2022-12-14 10:40:47,826 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 10:40:47,828 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,829 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,829 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,829 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,830 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,835 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,836 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,837 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,837 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,838 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,839 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,839 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,839 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 10:40:47,846 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:40:47,847 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:40:47,847 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 10:40:47,851 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 10:40:47,852 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 10:40:47,852 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 10:40:47,874 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 10:40:47,874 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 10:40:47,875 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 10:40:47,875 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 10:40:47,876 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 10:40:47,877 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 10:40:47,877 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 10:40:47,877 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 10:40:47,878 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 10:40:47,878 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 10:40:47,878 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 10:40:47,896 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 10:40:47,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:40:48,070 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:40:48,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48 WrapperNode [2022-12-14 10:40:48,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:40:48,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:40:48,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:40:48,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:40:48,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,160 INFO L138 Inliner]: procedures = 698, calls = 1045, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 225 [2022-12-14 10:40:48,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:40:48,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:40:48,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:40:48,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:40:48,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,200 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:40:48,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:40:48,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:40:48,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:40:48,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (1/1) ... [2022-12-14 10:40:48,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:40:48,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:40:48,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:40:48,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:40:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-12-14 10:40:48,272 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-12-14 10:40:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-12-14 10:40:48,272 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-12-14 10:40:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:40:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 10:40:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 10:40:48,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 10:40:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 10:40:48,273 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 10:40:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 10:40:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 10:40:48,273 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 10:40:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:40:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 10:40:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:40:48,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:40:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-12-14 10:40:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-12-14 10:40:48,274 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-12-14 10:40:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-14 10:40:48,274 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-14 10:40:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 10:40:48,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 10:40:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:40:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 10:40:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 10:40:48,274 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 10:40:48,275 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 10:40:48,275 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-12-14 10:40:48,275 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-12-14 10:40:48,471 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:40:48,474 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:40:48,905 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:40:48,911 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:40:48,912 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 10:40:48,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:40:48 BoogieIcfgContainer [2022-12-14 10:40:48,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:40:48,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:40:48,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:40:48,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:40:48,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:40:46" (1/3) ... [2022-12-14 10:40:48,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a88801f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:40:48, skipping insertion in model container [2022-12-14 10:40:48,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:48" (2/3) ... [2022-12-14 10:40:48,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a88801f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:40:48, skipping insertion in model container [2022-12-14 10:40:48,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:40:48" (3/3) ... [2022-12-14 10:40:48,922 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_back_harness.i [2022-12-14 10:40:48,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:40:48,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:40:48,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:40:48,999 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;@1e61ceba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:40:49,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:40:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 10:40:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:40:49,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:40:49,016 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:40:49,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:40:49,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:40:49,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1579343520, now seen corresponding path program 1 times [2022-12-14 10:40:49,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:40:49,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733777008] [2022-12-14 10:40:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:40:49,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:49,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:40:49,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:40:49,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 10:40:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:40:49,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:40:49,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:40:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 10:40:49,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:40:49,392 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:40:49,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733777008] [2022-12-14 10:40:49,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733777008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:40:49,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:40:49,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:40:49,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818609955] [2022-12-14 10:40:49,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:40:49,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:40:49,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:40:49,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:40:49,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:40:49,421 INFO L87 Difference]: Start difference. First operand has 137 states, 89 states have (on average 1.303370786516854) internal successors, (116), 90 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 10:40:49,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:40:49,496 INFO L93 Difference]: Finished difference Result 274 states and 414 transitions. [2022-12-14 10:40:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:40:49,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2022-12-14 10:40:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:40:49,507 INFO L225 Difference]: With dead ends: 274 [2022-12-14 10:40:49,507 INFO L226 Difference]: Without dead ends: 140 [2022-12-14 10:40:49,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:40:49,514 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 12 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:40:49,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 536 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:40:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-14 10:40:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2022-12-14 10:40:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.244186046511628) internal successors, (107), 87 states have internal predecessors, (107), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 10:40:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 180 transitions. [2022-12-14 10:40:49,558 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 180 transitions. Word has length 116 [2022-12-14 10:40:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:40:49,559 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 180 transitions. [2022-12-14 10:40:49,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 10:40:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 180 transitions. [2022-12-14 10:40:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:40:49,562 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:40:49,562 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:40:49,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:40:49,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:49,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:40:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:40:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash -183799078, now seen corresponding path program 1 times [2022-12-14 10:40:49,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:40:49,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664945070] [2022-12-14 10:40:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:40:49,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:49,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:40:49,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:40:49,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 10:40:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:40:50,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:40:50,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:40:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 10:40:50,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:40:50,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:40:50,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664945070] [2022-12-14 10:40:50,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664945070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:40:50,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:40:50,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:40:50,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737441030] [2022-12-14 10:40:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:40:50,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:40:50,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:40:50,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:40:50,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:40:50,133 INFO L87 Difference]: Start difference. First operand 134 states and 180 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 10:40:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:40:50,194 INFO L93 Difference]: Finished difference Result 255 states and 350 transitions. [2022-12-14 10:40:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:40:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2022-12-14 10:40:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:40:50,196 INFO L225 Difference]: With dead ends: 255 [2022-12-14 10:40:50,196 INFO L226 Difference]: Without dead ends: 141 [2022-12-14 10:40:50,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:40:50,197 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 9 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:40:50,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 688 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:40:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-14 10:40:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2022-12-14 10:40:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 10:40:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2022-12-14 10:40:50,207 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 116 [2022-12-14 10:40:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:40:50,208 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2022-12-14 10:40:50,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 10:40:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2022-12-14 10:40:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 10:40:50,209 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:40:50,209 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:40:50,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 10:40:50,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:50,410 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:40:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:40:50,411 INFO L85 PathProgramCache]: Analyzing trace with hash -543175276, now seen corresponding path program 1 times [2022-12-14 10:40:50,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:40:50,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239751366] [2022-12-14 10:40:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:40:50,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:50,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:40:50,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:40:50,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 10:40:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:40:50,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:40:50,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:40:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 10:40:50,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:40:50,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:40:50,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239751366] [2022-12-14 10:40:50,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239751366] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:40:50,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:40:50,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:40:50,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852580236] [2022-12-14 10:40:50,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:40:50,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:40:50,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:40:50,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:40:50,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:40:50,653 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 10:40:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:40:50,761 INFO L93 Difference]: Finished difference Result 256 states and 345 transitions. [2022-12-14 10:40:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:40:50,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 116 [2022-12-14 10:40:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:40:50,764 INFO L225 Difference]: With dead ends: 256 [2022-12-14 10:40:50,764 INFO L226 Difference]: Without dead ends: 139 [2022-12-14 10:40:50,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:40:50,769 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 2 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:40:50,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 800 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:40:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-14 10:40:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-12-14 10:40:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 92 states have internal predecessors, (111), 37 states have call successors, (37), 10 states have call predecessors, (37), 11 states have return successors, (40), 36 states have call predecessors, (40), 36 states have call successors, (40) [2022-12-14 10:40:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 188 transitions. [2022-12-14 10:40:50,783 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 188 transitions. Word has length 116 [2022-12-14 10:40:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:40:50,784 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 188 transitions. [2022-12-14 10:40:50,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 10:40:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 188 transitions. [2022-12-14 10:40:50,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 10:40:50,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:40:50,786 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:40:50,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 10:40:50,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:50,988 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:40:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:40:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1486715478, now seen corresponding path program 1 times [2022-12-14 10:40:50,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:40:50,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778707617] [2022-12-14 10:40:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:40:50,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:50,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:40:50,995 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:40:50,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 10:40:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:40:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:40:51,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:40:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 10:40:51,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:40:51,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:40:51,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778707617] [2022-12-14 10:40:51,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778707617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:40:51,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:40:51,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:40:51,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836153776] [2022-12-14 10:40:51,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:40:51,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:40:51,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:40:51,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:40:51,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:40:51,398 INFO L87 Difference]: Start difference. First operand 139 states and 188 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:40:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:40:51,679 INFO L93 Difference]: Finished difference Result 261 states and 356 transitions. [2022-12-14 10:40:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:40:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 118 [2022-12-14 10:40:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:40:51,681 INFO L225 Difference]: With dead ends: 261 [2022-12-14 10:40:51,681 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 10:40:51,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:40:51,683 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 69 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:40:51,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 836 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:40:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 10:40:51,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-12-14 10:40:51,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 95 states have internal predecessors, (113), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2022-12-14 10:40:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 192 transitions. [2022-12-14 10:40:51,700 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 192 transitions. Word has length 118 [2022-12-14 10:40:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:40:51,703 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 192 transitions. [2022-12-14 10:40:51,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:40:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 192 transitions. [2022-12-14 10:40:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 10:40:51,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:40:51,706 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:40:51,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 10:40:51,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:51,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:40:51,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:40:51,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1084644541, now seen corresponding path program 1 times [2022-12-14 10:40:51,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:40:51,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990875258] [2022-12-14 10:40:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:40:51,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:51,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:40:51,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:40:51,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 10:40:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:40:52,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:40:52,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:40:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 10:40:52,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:40:52,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:40:52,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990875258] [2022-12-14 10:40:52,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990875258] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:40:52,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:40:52,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:40:52,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451586753] [2022-12-14 10:40:52,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:40:52,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:40:52,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:40:52,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:40:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:40:52,256 INFO L87 Difference]: Start difference. First operand 142 states and 192 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:40:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:40:52,643 INFO L93 Difference]: Finished difference Result 276 states and 381 transitions. [2022-12-14 10:40:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:40:52,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 120 [2022-12-14 10:40:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:40:52,646 INFO L225 Difference]: With dead ends: 276 [2022-12-14 10:40:52,646 INFO L226 Difference]: Without dead ends: 154 [2022-12-14 10:40:52,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:40:52,647 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 99 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:40:52,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 978 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:40:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-14 10:40:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 144. [2022-12-14 10:40:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 97 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2022-12-14 10:40:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 195 transitions. [2022-12-14 10:40:52,662 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 195 transitions. Word has length 120 [2022-12-14 10:40:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:40:52,663 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 195 transitions. [2022-12-14 10:40:52,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:40:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 195 transitions. [2022-12-14 10:40:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 10:40:52,664 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:40:52,664 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:40:52,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 10:40:52,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:52,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:40:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:40:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1096826829, now seen corresponding path program 1 times [2022-12-14 10:40:52,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:40:52,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69391233] [2022-12-14 10:40:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:40:52,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:52,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:40:52,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:40:52,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 10:40:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:40:53,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:40:53,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:40:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 10:40:53,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:40:53,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:40:53,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69391233] [2022-12-14 10:40:53,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69391233] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:40:53,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:40:53,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:40:53,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043198653] [2022-12-14 10:40:53,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:40:53,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:40:53,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:40:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:40:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:40:53,154 INFO L87 Difference]: Start difference. First operand 144 states and 195 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:40:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:40:53,406 INFO L93 Difference]: Finished difference Result 277 states and 385 transitions. [2022-12-14 10:40:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:40:53,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 121 [2022-12-14 10:40:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:40:53,408 INFO L225 Difference]: With dead ends: 277 [2022-12-14 10:40:53,408 INFO L226 Difference]: Without dead ends: 153 [2022-12-14 10:40:53,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:40:53,410 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 82 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:40:53,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 683 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:40:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-14 10:40:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2022-12-14 10:40:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 95 states have (on average 1.231578947368421) internal successors, (117), 98 states have internal predecessors, (117), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2022-12-14 10:40:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 196 transitions. [2022-12-14 10:40:53,429 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 196 transitions. Word has length 121 [2022-12-14 10:40:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:40:53,429 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 196 transitions. [2022-12-14 10:40:53,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:40:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 196 transitions. [2022-12-14 10:40:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 10:40:53,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:40:53,430 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:40:53,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-12-14 10:40:53,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:53,631 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:40:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:40:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash 546558767, now seen corresponding path program 1 times [2022-12-14 10:40:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:40:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455347808] [2022-12-14 10:40:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:40:53,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:53,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:40:53,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:40:53,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 10:40:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:40:53,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:40:53,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:40:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 10:40:53,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:40:53,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:40:53,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455347808] [2022-12-14 10:40:53,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455347808] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:40:53,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:40:53,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:40:53,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017792988] [2022-12-14 10:40:53,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:40:53,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:40:53,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:40:53,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:40:53,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:40:53,868 INFO L87 Difference]: Start difference. First operand 145 states and 196 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:40:53,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:40:53,990 INFO L93 Difference]: Finished difference Result 276 states and 376 transitions. [2022-12-14 10:40:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:40:53,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 129 [2022-12-14 10:40:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:40:53,992 INFO L225 Difference]: With dead ends: 276 [2022-12-14 10:40:53,992 INFO L226 Difference]: Without dead ends: 151 [2022-12-14 10:40:53,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:40:53,993 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 4 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:40:53,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 981 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:40:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-12-14 10:40:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2022-12-14 10:40:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 96 states have (on average 1.2291666666666667) internal successors, (118), 99 states have internal predecessors, (118), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2022-12-14 10:40:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 197 transitions. [2022-12-14 10:40:54,008 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 197 transitions. Word has length 129 [2022-12-14 10:40:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:40:54,009 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 197 transitions. [2022-12-14 10:40:54,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:40:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 197 transitions. [2022-12-14 10:40:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 10:40:54,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:40:54,010 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:40:54,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 10:40:54,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:54,212 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:40:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:40:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1662855644, now seen corresponding path program 1 times [2022-12-14 10:40:54,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:40:54,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219206176] [2022-12-14 10:40:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:40:54,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:54,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:40:54,220 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:40:54,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 10:40:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:40:54,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 10:40:54,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:40:56,811 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|))))) is different from true [2022-12-14 10:40:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 10:40:57,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:40:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-12-14 10:40:57,303 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:40:57,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219206176] [2022-12-14 10:40:57,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219206176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:40:57,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1183238159] [2022-12-14 10:40:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:40:57,304 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:40:57,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:40:57,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:40:57,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-12-14 10:40:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:40:57,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:40:57,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:40:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 10:40:57,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:40:57,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1183238159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:40:57,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:40:57,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8] total 22 [2022-12-14 10:40:57,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532025143] [2022-12-14 10:40:57,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:40:57,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:40:57,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:40:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:40:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=369, Unknown=1, NotChecked=38, Total=462 [2022-12-14 10:40:57,616 INFO L87 Difference]: Start difference. First operand 146 states and 197 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 10:40:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:40:57,787 INFO L93 Difference]: Finished difference Result 281 states and 384 transitions. [2022-12-14 10:40:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:40:57,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 131 [2022-12-14 10:40:57,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:40:57,789 INFO L225 Difference]: With dead ends: 281 [2022-12-14 10:40:57,789 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 10:40:57,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 369 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=73, Invalid=530, Unknown=1, NotChecked=46, Total=650 [2022-12-14 10:40:57,791 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 8 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:40:57,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1152 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:40:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 10:40:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2022-12-14 10:40:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 100 states have internal predecessors, (119), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (42), 36 states have call predecessors, (42), 36 states have call successors, (42) [2022-12-14 10:40:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 198 transitions. [2022-12-14 10:40:57,799 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 198 transitions. Word has length 131 [2022-12-14 10:40:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:40:57,799 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 198 transitions. [2022-12-14 10:40:57,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 10:40:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 198 transitions. [2022-12-14 10:40:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 10:40:57,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:40:57,800 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 10:40:57,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-12-14 10:40:58,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 10:40:58,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:58,203 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:40:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:40:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash 369986644, now seen corresponding path program 1 times [2022-12-14 10:40:58,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:40:58,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786849507] [2022-12-14 10:40:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:40:58,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:40:58,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:40:58,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:40:58,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 10:40:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:40:58,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:40:58,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:00,795 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_8| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_8|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_8|))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_8| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_8|) (_ bv0 64)) (_ bv16 64))))) is different from true [2022-12-14 10:41:02,933 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_9| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_9|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_9| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_9|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_9|)))) is different from true [2022-12-14 10:41:05,067 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_10|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_10| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_10|) (_ bv0 64)))))) is different from true [2022-12-14 10:41:13,204 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:41:21,464 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:41:29,656 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:41:37,957 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:41:46,225 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:41:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 14 not checked. [2022-12-14 10:41:46,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:41:51,364 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 10:41:51,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-14 10:41:51,381 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-14 10:41:51,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 10:41:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-12-14 10:41:51,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:41:51,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786849507] [2022-12-14 10:41:51,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786849507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:41:51,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1581502412] [2022-12-14 10:41:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:51,401 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:41:51,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:41:51,401 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:41:51,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 10:41:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:51,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:41:51,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 10:41:51,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:41:51,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1581502412] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:51,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:41:51,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18, 14] total 31 [2022-12-14 10:41:51,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934558052] [2022-12-14 10:41:51,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:51,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:41:51,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:41:51,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:41:51,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=675, Unknown=4, NotChecked=162, Total=930 [2022-12-14 10:41:51,759 INFO L87 Difference]: Start difference. First operand 147 states and 198 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:41:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:51,932 INFO L93 Difference]: Finished difference Result 273 states and 367 transitions. [2022-12-14 10:41:51,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:41:51,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 132 [2022-12-14 10:41:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:51,934 INFO L225 Difference]: With dead ends: 273 [2022-12-14 10:41:51,934 INFO L226 Difference]: Without dead ends: 149 [2022-12-14 10:41:51,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 361 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=95, Invalid=725, Unknown=4, NotChecked=168, Total=992 [2022-12-14 10:41:51,936 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 2 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:51,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 801 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:41:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-12-14 10:41:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-12-14 10:41:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 102 states have internal predecessors, (120), 37 states have call successors, (37), 10 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2022-12-14 10:41:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 202 transitions. [2022-12-14 10:41:51,946 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 202 transitions. Word has length 132 [2022-12-14 10:41:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:51,947 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 202 transitions. [2022-12-14 10:41:51,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:41:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 202 transitions. [2022-12-14 10:41:51,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 10:41:51,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:51,947 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:51,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 10:41:52,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-12-14 10:41:52,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:41:52,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:52,351 INFO L85 PathProgramCache]: Analyzing trace with hash 665791126, now seen corresponding path program 1 times [2022-12-14 10:41:52,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:41:52,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531853813] [2022-12-14 10:41:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:52,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:41:52,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:41:52,356 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:41:52,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 10:41:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:52,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:41:52,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:41:54,928 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_14| (_ BitVec 64))) (not (= (_ bv16 64) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_14|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_14| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_14| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_14|) (_ bv0 64)))))) is different from true [2022-12-14 10:41:57,088 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_15| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_15|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_15|))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_15| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_15|) (_ bv0 64)) (_ bv16 64))))) is different from true [2022-12-14 10:41:59,243 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_16| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_16| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_16|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_16| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_16|) (_ bv0 64)) (_ bv16 64))))) is different from true [2022-12-14 10:42:07,392 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:42:15,635 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:42:23,833 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:42:32,160 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:42:40,407 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:42:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 14 not checked. [2022-12-14 10:42:40,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:42:45,518 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 10:42:45,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-14 10:42:45,533 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-14 10:42:45,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 10:42:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-12-14 10:42:45,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:42:45,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531853813] [2022-12-14 10:42:45,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531853813] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:42:45,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [58070386] [2022-12-14 10:42:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:45,548 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:42:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:42:45,549 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:42:45,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 10:42:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:45,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:42:45,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:42:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 10:42:46,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:42:46,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [58070386] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:46,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:42:46,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18, 14] total 35 [2022-12-14 10:42:46,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097742788] [2022-12-14 10:42:46,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:46,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:42:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:42:46,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:42:46,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=899, Unknown=4, NotChecked=186, Total=1190 [2022-12-14 10:42:46,353 INFO L87 Difference]: Start difference. First operand 149 states and 202 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 10:42:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:46,889 INFO L93 Difference]: Finished difference Result 278 states and 374 transitions. [2022-12-14 10:42:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:42:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 134 [2022-12-14 10:42:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:46,891 INFO L225 Difference]: With dead ends: 278 [2022-12-14 10:42:46,891 INFO L226 Difference]: Without dead ends: 149 [2022-12-14 10:42:46,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 365 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=121, Invalid=1147, Unknown=4, NotChecked=210, Total=1482 [2022-12-14 10:42:46,893 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 85 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:46,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 949 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:42:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-12-14 10:42:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-12-14 10:42:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 98 states have (on average 1.2142857142857142) internal successors, (119), 102 states have internal predecessors, (119), 37 states have call successors, (37), 10 states have call predecessors, (37), 13 states have return successors, (45), 36 states have call predecessors, (45), 36 states have call successors, (45) [2022-12-14 10:42:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 201 transitions. [2022-12-14 10:42:46,901 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 201 transitions. Word has length 134 [2022-12-14 10:42:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:46,901 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 201 transitions. [2022-12-14 10:42:46,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 10:42:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 201 transitions. [2022-12-14 10:42:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 10:42:46,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:46,903 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2022-12-14 10:42:46,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-12-14 10:42:47,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-14 10:42:47,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:42:47,305 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:47,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:47,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1372436029, now seen corresponding path program 1 times [2022-12-14 10:42:47,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:42:47,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282656739] [2022-12-14 10:42:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:47,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:42:47,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:42:47,312 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:42:47,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 10:42:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:47,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:42:47,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:42:49,876 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_24| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_24| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_24|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_24| (_ BitVec 64))) (not (= (_ bv16 64) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_24|) (_ bv0 64)))))) is different from true [2022-12-14 10:42:52,049 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_25| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_25| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_25|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_25| (_ BitVec 64))) (not (= (_ bv16 64) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_25|) (_ bv0 64)))))) is different from true [2022-12-14 10:42:54,166 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_26| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_26|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_26| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_26| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_26|) (_ bv0 64)))))) is different from true [2022-12-14 10:43:02,339 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:43:10,558 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:43:18,797 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:43:27,084 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:43:35,316 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:43:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 14 not checked. [2022-12-14 10:43:35,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:43:40,349 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 10:43:40,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-14 10:43:40,364 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-14 10:43:40,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 10:43:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-12-14 10:43:40,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:43:40,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282656739] [2022-12-14 10:43:40,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282656739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:43:40,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [720347369] [2022-12-14 10:43:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:40,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:43:40,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:43:40,379 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:43:40,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 10:43:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:40,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:43:40,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:43:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 10:43:41,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:43:41,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [720347369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:41,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:43:41,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18, 14] total 36 [2022-12-14 10:43:41,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493785492] [2022-12-14 10:43:41,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:41,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 10:43:41,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:43:41,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 10:43:41,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=960, Unknown=4, NotChecked=192, Total=1260 [2022-12-14 10:43:41,361 INFO L87 Difference]: Start difference. First operand 149 states and 201 transitions. Second operand has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 10:43:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:42,035 INFO L93 Difference]: Finished difference Result 280 states and 378 transitions. [2022-12-14 10:43:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:43:42,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 136 [2022-12-14 10:43:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:42,037 INFO L225 Difference]: With dead ends: 280 [2022-12-14 10:43:42,037 INFO L226 Difference]: Without dead ends: 150 [2022-12-14 10:43:42,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 371 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=132, Invalid=1282, Unknown=4, NotChecked=222, Total=1640 [2022-12-14 10:43:42,039 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 108 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:42,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1081 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:43:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-14 10:43:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2022-12-14 10:43:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 98 states have internal predecessors, (115), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (43), 36 states have call predecessors, (43), 36 states have call successors, (43) [2022-12-14 10:43:42,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 195 transitions. [2022-12-14 10:43:42,046 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 195 transitions. Word has length 136 [2022-12-14 10:43:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:42,046 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 195 transitions. [2022-12-14 10:43:42,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 10:43:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 195 transitions. [2022-12-14 10:43:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 10:43:42,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:42,047 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:43:42,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 10:43:42,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-12-14 10:43:42,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:43:42,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash 180165591, now seen corresponding path program 1 times [2022-12-14 10:43:42,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:43:42,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797814342] [2022-12-14 10:43:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:42,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:43:42,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:43:42,455 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:43:42,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 10:43:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:42,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:43:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:43:45,184 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_34| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_34|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_34| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_34| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_34|) (_ bv0 64)))))) is different from true [2022-12-14 10:43:47,325 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_35| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_35|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_35| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_35| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_35|) (_ bv0 64)))))) is different from true [2022-12-14 10:43:49,453 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_36| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_36| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_36|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_36| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_36|) (_ bv0 64)) (_ bv16 64))))) is different from true [2022-12-14 10:43:57,627 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:44:05,969 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:44:14,255 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:44:22,535 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:44:30,800 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:44:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 14 not checked. [2022-12-14 10:44:30,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:44:35,720 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 10:44:35,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-14 10:44:35,739 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-14 10:44:35,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 10:44:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-14 10:44:35,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:44:35,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797814342] [2022-12-14 10:44:35,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797814342] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:44:35,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [930763090] [2022-12-14 10:44:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:35,752 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:44:35,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:44:35,752 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:44:35,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 10:44:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:35,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:44:35,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:44:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 10:44:36,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:44:36,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [930763090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:36,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:44:36,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18, 14] total 32 [2022-12-14 10:44:36,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141574190] [2022-12-14 10:44:36,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:36,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:44:36,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:44:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:44:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=729, Unknown=4, NotChecked=168, Total=992 [2022-12-14 10:44:36,193 INFO L87 Difference]: Start difference. First operand 145 states and 195 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:44:36,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:36,439 INFO L93 Difference]: Finished difference Result 270 states and 363 transitions. [2022-12-14 10:44:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:44:36,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 145 [2022-12-14 10:44:36,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:36,441 INFO L225 Difference]: With dead ends: 270 [2022-12-14 10:44:36,441 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 10:44:36,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 399 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=101, Invalid=837, Unknown=4, NotChecked=180, Total=1122 [2022-12-14 10:44:36,442 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 4 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:36,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 972 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:44:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 10:44:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2022-12-14 10:44:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 99 states have internal predecessors, (116), 37 states have call successors, (37), 10 states have call predecessors, (37), 12 states have return successors, (43), 36 states have call predecessors, (43), 36 states have call successors, (43) [2022-12-14 10:44:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 196 transitions. [2022-12-14 10:44:36,449 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 196 transitions. Word has length 145 [2022-12-14 10:44:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:36,449 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 196 transitions. [2022-12-14 10:44:36,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:44:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 196 transitions. [2022-12-14 10:44:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 10:44:36,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:36,450 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:44:36,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 10:44:36,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 10:44:36,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:44:36,852 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash 92860100, now seen corresponding path program 2 times [2022-12-14 10:44:36,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:44:36,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617184576] [2022-12-14 10:44:36,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:44:36,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:44:36,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:44:36,857 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:44:36,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 10:44:37,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:44:37,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:44:37,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:44:37,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:44:39,458 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_40| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_40| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_40|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_40| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_40|) (_ bv0 64)) (_ bv16 64))))) is different from true [2022-12-14 10:44:41,606 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_41| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_41|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_41| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_41| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_41|) (_ bv0 64)))))) is different from true [2022-12-14 10:44:43,740 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_42| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_42| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_42|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_42| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_42|) (_ bv0 64)) (_ bv16 64))))) is different from true [2022-12-14 10:44:51,893 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:45:00,149 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:45:08,340 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:45:16,695 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:45:24,975 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:45:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 14 not checked. [2022-12-14 10:45:25,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:45:30,164 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 10:45:30,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-14 10:45:30,182 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-14 10:45:30,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 10:45:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 6 proven. 59 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-12-14 10:45:30,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:45:30,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617184576] [2022-12-14 10:45:30,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617184576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:45:30,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [871428913] [2022-12-14 10:45:30,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:45:30,197 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:45:30,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:45:30,198 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:45:30,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 10:45:30,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:45:30,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:45:30,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:45:30,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:45:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 10:45:30,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:45:30,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [871428913] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:45:30,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:45:30,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18, 14] total 33 [2022-12-14 10:45:30,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301035564] [2022-12-14 10:45:30,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:45:30,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:45:30,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:45:30,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:45:30,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=785, Unknown=4, NotChecked=174, Total=1056 [2022-12-14 10:45:30,968 INFO L87 Difference]: Start difference. First operand 146 states and 196 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 10:45:31,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:45:31,353 INFO L93 Difference]: Finished difference Result 271 states and 363 transitions. [2022-12-14 10:45:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:45:31,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 147 [2022-12-14 10:45:31,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:45:31,354 INFO L225 Difference]: With dead ends: 271 [2022-12-14 10:45:31,354 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 10:45:31,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 405 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=109, Invalid=955, Unknown=4, NotChecked=192, Total=1260 [2022-12-14 10:45:31,355 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 8 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:45:31,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1125 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:45:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 10:45:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2022-12-14 10:45:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 96 states have internal predecessors, (114), 37 states have call successors, (37), 10 states have call predecessors, (37), 11 states have return successors, (39), 36 states have call predecessors, (39), 36 states have call successors, (39) [2022-12-14 10:45:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 190 transitions. [2022-12-14 10:45:31,363 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 190 transitions. Word has length 147 [2022-12-14 10:45:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:45:31,363 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 190 transitions. [2022-12-14 10:45:31,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 10:45:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 190 transitions. [2022-12-14 10:45:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 10:45:31,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:45:31,364 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:45:31,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-12-14 10:45:31,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 10:45:31,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:45:31,766 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:45:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:45:31,767 INFO L85 PathProgramCache]: Analyzing trace with hash 765829908, now seen corresponding path program 2 times [2022-12-14 10:45:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:45:31,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047802203] [2022-12-14 10:45:31,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:45:31,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:45:31,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:45:31,771 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:45:31,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 10:45:32,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:45:32,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:45:32,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:45:32,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:45:34,335 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_46| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_46| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_46|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_46| (_ BitVec 64))) (not (= (_ bv16 64) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_46|) (_ bv0 64)))))) is different from true [2022-12-14 10:45:36,478 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_47| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_47| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_47|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_47| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_47|) (_ bv0 64)) (_ bv16 64))))) is different from true [2022-12-14 10:45:38,590 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_48| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_48|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_48| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_48| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_48|) (_ bv0 64)))))) is different from true [2022-12-14 10:45:46,737 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:45:54,978 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:46:03,173 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:46:11,508 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:46:19,782 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:46:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 14 not checked. [2022-12-14 10:46:19,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:46:24,731 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 10:46:24,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-14 10:46:24,746 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-14 10:46:24,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 10:46:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-12-14 10:46:24,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:46:24,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047802203] [2022-12-14 10:46:24,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047802203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:46:24,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1185597237] [2022-12-14 10:46:24,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:46:24,766 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:46:24,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:46:24,767 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:46:24,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 10:46:25,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:46:25,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:46:25,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 10:46:25,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:46:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:46:25,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-12-14 10:46:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-12-14 10:46:36,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:46:37,329 INFO L321 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2022-12-14 10:46:37,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 93 [2022-12-14 10:46:37,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:46:37,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 109 [2022-12-14 10:46:37,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 60 [2022-12-14 10:46:37,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-12-14 10:46:37,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:46:37,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 121 [2022-12-14 10:46:37,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 104 treesize of output 102 [2022-12-14 10:46:37,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-12-14 10:46:37,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:46:37,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 128 [2022-12-14 10:46:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-14 10:46:38,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1185597237] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 10:46:38,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:46:38,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [18, 14, 15] total 51 [2022-12-14 10:46:38,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403787076] [2022-12-14 10:46:38,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:46:38,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:46:38,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:46:38,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:46:38,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2098, Unknown=6, NotChecked=282, Total=2550 [2022-12-14 10:46:38,322 INFO L87 Difference]: Start difference. First operand 143 states and 190 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 10:46:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:46:42,030 INFO L93 Difference]: Finished difference Result 343 states and 481 transitions. [2022-12-14 10:46:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:46:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 148 [2022-12-14 10:46:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:46:42,033 INFO L225 Difference]: With dead ends: 343 [2022-12-14 10:46:42,033 INFO L226 Difference]: Without dead ends: 234 [2022-12-14 10:46:42,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 517 SyntacticMatches, 23 SemanticMatches, 58 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 63.7s TimeCoverageRelationStatistics Valid=231, Invalid=2967, Unknown=6, NotChecked=336, Total=3540 [2022-12-14 10:46:42,034 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 128 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:46:42,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1393 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 10:46:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-12-14 10:46:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 173. [2022-12-14 10:46:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 116 states have internal predecessors, (135), 48 states have call successors, (48), 10 states have call predecessors, (48), 12 states have return successors, (54), 46 states have call predecessors, (54), 47 states have call successors, (54) [2022-12-14 10:46:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 237 transitions. [2022-12-14 10:46:42,052 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 237 transitions. Word has length 148 [2022-12-14 10:46:42,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:46:42,053 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 237 transitions. [2022-12-14 10:46:42,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 10:46:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 237 transitions. [2022-12-14 10:46:42,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 10:46:42,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:46:42,055 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 10:46:42,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 10:46:42,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-12-14 10:46:42,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:46:42,456 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:46:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:46:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash 189308624, now seen corresponding path program 1 times [2022-12-14 10:46:42,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:46:42,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143805779] [2022-12-14 10:46:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:46:42,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:46:42,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:46:42,463 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:46:42,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 10:46:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:46:42,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:46:42,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:46:45,123 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_60| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_60|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_60| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_60| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_60|) (_ bv0 64)))))) is different from true [2022-12-14 10:46:47,268 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_61| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_61|) (_ bv0 64)) (_ bv16 64)))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_61| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_61|) (_ bv0 64)) |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_61|)))) is different from true [2022-12-14 10:46:49,387 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_62| (_ BitVec 64))) (not (= |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_62| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_62|) (_ bv0 64))))) (exists ((|v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_62| (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_pop_back_~list#1.base_BEFORE_CALL_62|) (_ bv0 64)) (_ bv16 64))))) is different from true [2022-12-14 10:46:57,575 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:47:05,802 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:47:13,994 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:47:22,302 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:47:30,576 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:47:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 14 not checked. [2022-12-14 10:47:30,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:47:35,617 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 10:47:35,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-12-14 10:47:35,632 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-14 10:47:35,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 10:47:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 10:47:35,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:47:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143805779] [2022-12-14 10:47:35,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143805779] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:47:35,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [223244998] [2022-12-14 10:47:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:47:35,650 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:47:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:47:35,651 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:47:35,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 10:47:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:47:36,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 10:47:36,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:47:36,421 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-12-14 10:47:36,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-12-14 10:47:36,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 10:47:36,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 10:47:36,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-12-14 10:47:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 111 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 10:47:50,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:47:52,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:47:52,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 221 [2022-12-14 10:47:52,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 265 treesize of output 257 [2022-12-14 10:47:52,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 257 treesize of output 253 [2022-12-14 10:47:53,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-12-14 10:47:53,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-12-14 10:47:53,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 49 treesize of output 45 [2022-12-14 10:47:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-12-14 10:47:53,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [223244998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:47:53,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579944508] [2022-12-14 10:47:53,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:47:53,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:47:53,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:47:53,203 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:47:53,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcd843a4-57da-473e-bfb9-9827b0c49f4f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 10:47:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:47:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 10:47:53,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:48:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 34 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 10:48:00,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:48:00,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 10:48:01,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:48:01,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 10:48:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-12-14 10:48:01,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579944508] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:48:01,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:48:01,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 20, 16, 16, 15] total 72 [2022-12-14 10:48:01,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161114026] [2022-12-14 10:48:01,685 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:48:01,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 10:48:01,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:48:01,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 10:48:01,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=4385, Unknown=9, NotChecked=408, Total=5112 [2022-12-14 10:48:01,689 INFO L87 Difference]: Start difference. First operand 173 states and 237 transitions. Second operand has 72 states, 70 states have (on average 4.671428571428572) internal successors, (327), 65 states have internal predecessors, (327), 30 states have call successors, (79), 7 states have call predecessors, (79), 18 states have return successors, (79), 31 states have call predecessors, (79), 30 states have call successors, (79) [2022-12-14 10:48:04,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:48:07,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:48:10,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:48:12,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:48:29,062 WARN L233 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:48:31,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:48:41,443 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:48:53,711 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:49:03,995 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:49:06,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:49:16,498 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:49:22,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:49:31,285 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:49:39,554 WARN L233 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:49:47,798 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:49:49,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:49:51,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:49:53,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:49:55,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:50:04,360 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:50:12,615 WARN L233 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:50:22,052 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:50:24,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]