./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:38:06,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:38:06,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:38:06,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:38:06,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:38:06,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:38:06,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:38:06,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:38:06,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:38:06,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:38:06,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:38:06,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:38:06,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:38:06,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:38:06,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:38:06,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:38:06,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:38:06,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:38:06,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:38:06,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:38:07,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:38:07,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:38:07,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:38:07,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:38:07,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:38:07,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:38:07,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:38:07,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:38:07,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:38:07,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:38:07,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:38:07,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:38:07,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:38:07,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:38:07,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:38:07,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:38:07,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:38:07,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:38:07,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:38:07,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:38:07,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:38:07,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:38:07,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:38:07,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:38:07,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:38:07,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:38:07,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:38:07,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:38:07,077 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:38:07,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:38:07,077 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:38:07,078 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:38:07,078 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:38:07,078 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:38:07,078 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:38:07,079 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:38:07,079 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:38:07,079 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:38:07,080 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:38:07,080 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:38:07,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:38:07,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:38:07,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:38:07,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:38:07,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:38:07,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:38:07,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:38:07,082 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:38:07,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:38:07,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:38:07,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:38:07,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:07,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:38:07,084 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:38:07,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:38:07,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:38:07,085 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:38:07,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:38:07,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:38:07,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:38:07,086 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_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2022-10-17 17:38:07,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:38:07,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:38:07,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:38:07,363 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:38:07,363 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:38:07,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2022-10-17 17:38:07,436 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/data/48797590c/42e1a63494b147bca0a3e38490be390a/FLAG83657f80c [2022-10-17 17:38:08,309 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:38:08,310 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2022-10-17 17:38:08,356 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/data/48797590c/42e1a63494b147bca0a3e38490be390a/FLAG83657f80c [2022-10-17 17:38:08,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/data/48797590c/42e1a63494b147bca0a3e38490be390a [2022-10-17 17:38:08,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:38:08,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:38:08,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:08,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:38:08,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:38:08,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:08" (1/1) ... [2022-10-17 17:38:08,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db1d598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:08, skipping insertion in model container [2022-10-17 17:38:08,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:08" (1/1) ... [2022-10-17 17:38:08,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:38:08,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:38:09,296 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2022-10-17 17:38:09,305 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2022-10-17 17:38:10,149 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,150 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,151 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,152 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,153 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,169 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,169 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,172 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,173 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,175 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,177 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,177 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,178 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,571 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:38:10,572 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:38:10,573 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:38:10,575 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:38:10,577 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:38:10,577 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:38:10,578 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:38:10,579 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:38:10,580 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:38:10,580 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:38:10,747 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:38:10,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:10,790 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:38:10,825 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2022-10-17 17:38:10,826 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2022-10-17 17:38:10,875 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,876 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,876 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,877 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,877 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,891 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,892 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,893 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,894 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,895 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,896 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,897 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,897 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:10,936 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:38:10,938 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:38:10,939 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:38:10,940 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:38:10,941 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:38:10,941 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:38:10,942 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:38:10,943 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:38:10,943 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:38:10,944 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:38:10,970 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:38:10,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:11,225 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:38:11,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11 WrapperNode [2022-10-17 17:38:11,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:11,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:11,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:38:11,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:38:11,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,377 INFO L138 Inliner]: procedures = 679, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 29 [2022-10-17 17:38:11,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:11,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:38:11,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:38:11,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:38:11,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,414 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:38:11,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:38:11,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:38:11,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:38:11,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (1/1) ... [2022-10-17 17:38:11,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:11,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:38:11,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:38:11,568 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2022-10-17 17:38:11,569 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2022-10-17 17:38:11,569 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-10-17 17:38:11,569 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-10-17 17:38:11,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:38:11,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:38:11,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:38:11,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:38:11,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:38:11,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:38:11,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:38:11,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:38:11,570 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:38:11,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:38:11,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:38:11,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:38:11,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:38:11,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:38:11,906 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:38:11,908 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:38:12,047 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:38:12,105 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:38:12,105 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 17:38:12,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:12 BoogieIcfgContainer [2022-10-17 17:38:12,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:38:12,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:38:12,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:38:12,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:38:12,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:38:08" (1/3) ... [2022-10-17 17:38:12,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f643635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:12, skipping insertion in model container [2022-10-17 17:38:12,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:11" (2/3) ... [2022-10-17 17:38:12,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f643635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:12, skipping insertion in model container [2022-10-17 17:38:12,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:12" (3/3) ... [2022-10-17 17:38:12,150 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2022-10-17 17:38:12,174 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:38:12,174 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:38:12,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:38:12,284 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;@613ef0ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:38:12,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:38:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 17:38:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:38:12,296 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:12,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:12,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:12,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 325938203, now seen corresponding path program 1 times [2022-10-17 17:38:12,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:12,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464502282] [2022-10-17 17:38:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:12,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:12,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:12,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464502282] [2022-10-17 17:38:12,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464502282] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:12,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:12,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:38:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610644770] [2022-10-17 17:38:12,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:12,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:38:12,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:38:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:38:12,713 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:38:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:12,754 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2022-10-17 17:38:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:38:12,757 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-10-17 17:38:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:12,765 INFO L225 Difference]: With dead ends: 56 [2022-10-17 17:38:12,766 INFO L226 Difference]: Without dead ends: 29 [2022-10-17 17:38:12,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:38:12,773 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:12,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:38:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-17 17:38:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-10-17 17:38:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-17 17:38:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-10-17 17:38:12,813 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2022-10-17 17:38:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:12,813 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-10-17 17:38:12,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:38:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-10-17 17:38:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:38:12,816 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:12,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:12,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:38:12,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash -805366998, now seen corresponding path program 1 times [2022-10-17 17:38:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:12,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288521364] [2022-10-17 17:38:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:13,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:13,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288521364] [2022-10-17 17:38:13,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288521364] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:13,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:13,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:38:13,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595078666] [2022-10-17 17:38:13,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:13,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:38:13,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:38:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:38:13,164 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:38:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:13,281 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-10-17 17:38:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:38:13,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2022-10-17 17:38:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:13,285 INFO L225 Difference]: With dead ends: 39 [2022-10-17 17:38:13,285 INFO L226 Difference]: Without dead ends: 37 [2022-10-17 17:38:13,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:38:13,287 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:13,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-17 17:38:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-10-17 17:38:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-10-17 17:38:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-10-17 17:38:13,310 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2022-10-17 17:38:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:13,310 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-10-17 17:38:13,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:38:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-10-17 17:38:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 17:38:13,312 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:13,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:13,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:38:13,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash 989415369, now seen corresponding path program 1 times [2022-10-17 17:38:13,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:13,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523005325] [2022-10-17 17:38:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:13,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:13,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:13,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523005325] [2022-10-17 17:38:13,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523005325] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:13,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:13,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:38:13,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617811995] [2022-10-17 17:38:13,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:13,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:38:13,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:13,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:38:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:38:13,610 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:38:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:13,680 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-10-17 17:38:13,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:38:13,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-10-17 17:38:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:13,685 INFO L225 Difference]: With dead ends: 64 [2022-10-17 17:38:13,686 INFO L226 Difference]: Without dead ends: 37 [2022-10-17 17:38:13,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:38:13,693 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:13,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:38:13,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-17 17:38:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-10-17 17:38:13,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-10-17 17:38:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-10-17 17:38:13,725 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2022-10-17 17:38:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:13,726 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-10-17 17:38:13,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:38:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-10-17 17:38:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:38:13,727 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:13,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:13,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:38:13,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash -518460441, now seen corresponding path program 1 times [2022-10-17 17:38:13,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:13,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757069721] [2022-10-17 17:38:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:13,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:14,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757069721] [2022-10-17 17:38:14,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757069721] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:14,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800859614] [2022-10-17 17:38:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:14,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:14,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:14,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:14,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:38:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:14,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2022-10-17 17:38:14,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:14,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 17:38:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:14,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:15,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-10-17 17:38:15,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 20 [2022-10-17 17:38:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:15,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800859614] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1137951017] [2022-10-17 17:38:15,093 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-10-17 17:38:15,094 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:15,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:15,103 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:15,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:15,227 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-10-17 17:38:15,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 62 [2022-10-17 17:38:15,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:15,344 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-10-17 17:38:15,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:38:15,437 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-10-17 17:38:15,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:15,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:38:15,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:15,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:15,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:15,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-10-17 17:38:15,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-10-17 17:38:15,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-10-17 17:38:15,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:15,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:15,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:38:15,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:16,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:16,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:16,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:16,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:16,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:16,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:16,602 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 82 for LOIs [2022-10-17 17:38:16,679 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-10-17 17:38:16,709 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2022-10-17 17:38:16,756 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 133 for LOIs [2022-10-17 17:38:17,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:17,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:17,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:17,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:38:17,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:38:22,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '575#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| Int)) (and (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 2)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 5)) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 0)) 1 0) 0) 0 1) 256) 0)) (= 16 (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 4)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 0)) (not (= (mod (select (select |#memory_int| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 0) 256) 0)) (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 1) (<= 0 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 3)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:38:22,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:38:22,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:38:22,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 17 [2022-10-17 17:38:22,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503321614] [2022-10-17 17:38:22,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:38:22,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 17:38:22,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:22,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 17:38:22,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2022-10-17 17:38:22,218 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:38:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:22,448 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2022-10-17 17:38:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 17:38:22,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 23 [2022-10-17 17:38:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:22,450 INFO L225 Difference]: With dead ends: 74 [2022-10-17 17:38:22,451 INFO L226 Difference]: Without dead ends: 45 [2022-10-17 17:38:22,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2022-10-17 17:38:22,453 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:22,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 215 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-10-17 17:38:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-17 17:38:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-10-17 17:38:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.25) internal successors, (35), 30 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-10-17 17:38:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-10-17 17:38:22,463 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 23 [2022-10-17 17:38:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:22,463 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-10-17 17:38:22,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:38:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-10-17 17:38:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 17:38:22,465 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:22,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:22,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-17 17:38:22,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:22,679 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:22,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1249058711, now seen corresponding path program 1 times [2022-10-17 17:38:22,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:22,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97132119] [2022-10-17 17:38:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:22,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:22,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97132119] [2022-10-17 17:38:22,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97132119] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:22,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235781424] [2022-10-17 17:38:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:22,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:22,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:22,972 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:22,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:38:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjunts are in the unsatisfiable core [2022-10-17 17:38:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:23,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:23,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 17:38:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:23,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:24,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-10-17 17:38:24,948 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:38:24,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 114 treesize of output 108 [2022-10-17 17:38:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:25,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235781424] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:25,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [662349376] [2022-10-17 17:38:25,011 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-10-17 17:38:25,011 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:25,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:25,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:25,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:25,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,093 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-10-17 17:38:25,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 62 [2022-10-17 17:38:25,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,193 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-10-17 17:38:25,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:38:25,238 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-10-17 17:38:25,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 17:38:25,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:25,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 17:38:25,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 17:38:25,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:25,499 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-10-17 17:38:25,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2022-10-17 17:38:25,529 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-10-17 17:38:25,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-10-17 17:38:25,556 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-10-17 17:38:25,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-10-17 17:38:25,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:25,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:25,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:38:25,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:25,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:25,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:25,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:25,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:26,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-10-17 17:38:26,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 433 [2022-10-17 17:38:26,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 433 treesize of output 417 [2022-10-17 17:38:26,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:26,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:26,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:26,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:26,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:26,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:26,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:26,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:26,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:26,515 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2022-10-17 17:38:26,744 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-10-17 17:38:26,769 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2022-10-17 17:38:26,928 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2022-10-17 17:38:27,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:27,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:27,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:27,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:38:27,409 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:38:35,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '943#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 5 |~#s_can_fail_allocator_static~0.base|) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4 Int)) (and (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551616))))) 256) 0)) (<= aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551614) (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (<= 0 ~tl_last_error~0) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (<= 0 |#NULL.offset|) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 Int)) (and (= (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) 16) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23)) (<= 0 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 0)) (not (= (mod (ite (= 0 (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 0)) 1 0)) 0 1) 256) 0)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 4)) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) 1) (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 3)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 2)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:38:35,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:38:35,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:38:35,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 11] total 27 [2022-10-17 17:38:35,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230097170] [2022-10-17 17:38:35,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:38:35,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-17 17:38:35,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:35,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-17 17:38:35,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2022-10-17 17:38:35,146 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 27 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-17 17:38:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:35,747 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-10-17 17:38:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 17:38:35,749 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 26 [2022-10-17 17:38:35,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:35,751 INFO L225 Difference]: With dead ends: 88 [2022-10-17 17:38:35,751 INFO L226 Difference]: Without dead ends: 52 [2022-10-17 17:38:35,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=169, Invalid=2087, Unknown=0, NotChecked=0, Total=2256 [2022-10-17 17:38:35,754 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:35,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 302 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 290 Invalid, 0 Unknown, 90 Unchecked, 0.4s Time] [2022-10-17 17:38:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-10-17 17:38:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-10-17 17:38:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-10-17 17:38:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2022-10-17 17:38:35,767 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2022-10-17 17:38:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:35,767 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2022-10-17 17:38:35,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-17 17:38:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2022-10-17 17:38:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 17:38:35,769 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:35,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:35,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:35,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:35,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash -842842685, now seen corresponding path program 2 times [2022-10-17 17:38:35,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:35,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679510561] [2022-10-17 17:38:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:35,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:38:36,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679510561] [2022-10-17 17:38:36,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679510561] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:36,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470986965] [2022-10-17 17:38:36,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:38:36,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:36,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:36,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:36,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_688968a0-aa90-4859-930c-66d08206d5a9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:38:36,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 17:38:36,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:38:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-17 17:38:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:36,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:38:36,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-10-17 17:38:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:37,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:38,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-10-17 17:38:38,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 54 treesize of output 50 [2022-10-17 17:38:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:38,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470986965] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:38,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21140248] [2022-10-17 17:38:38,154 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-10-17 17:38:38,155 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:38,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:38,155 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:38,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:38:38,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,219 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-10-17 17:38:38,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:38:38,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 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 [2022-10-17 17:38:38,262 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-10-17 17:38:38,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:38,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:38:38,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:38,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:38,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:38,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-10-17 17:38:38,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-10-17 17:38:38,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-10-17 17:38:38,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:38,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-17 17:38:38,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:38,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-17 17:38:38,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:38,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:38,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:38,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:39,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-10-17 17:38:39,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 473 [2022-10-17 17:38:39,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 473 treesize of output 417 [2022-10-17 17:38:39,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:39,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:39,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:39,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:39,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:39,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:39,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:39,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:38:39,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-10-17 17:38:39,352 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs