./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V --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 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:59:23,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:59:23,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:59:23,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:59:23,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:59:23,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:59:23,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:59:23,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:59:23,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:59:23,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:59:23,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:59:23,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:59:23,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:59:23,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:59:23,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:59:24,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:59:24,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:59:24,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:59:24,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:59:24,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:59:24,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:59:24,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:59:24,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:59:24,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:59:24,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:59:24,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:59:24,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:59:24,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:59:24,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:59:24,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:59:24,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:59:24,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:59:24,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:59:24,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:59:24,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:59:24,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:59:24,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:59:24,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:59:24,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:59:24,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:59:24,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:59:24,083 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 01:59:24,142 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:59:24,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:59:24,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:59:24,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:59:24,153 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:59:24,153 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:59:24,154 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:59:24,154 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:59:24,154 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:59:24,155 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:59:24,156 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:59:24,157 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:59:24,157 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:59:24,157 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:59:24,158 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:59:24,158 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:59:24,158 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:59:24,159 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:59:24,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:59:24,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:59:24,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:59:24,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:59:24,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:59:24,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:59:24,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:59:24,162 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:59:24,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:59:24,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:59:24,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:59:24,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:59:24,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:59:24,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:59:24,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:59:24,165 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:59:24,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:59:24,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:59:24,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:59:24,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:59:24,167 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e [2021-11-23 01:59:24,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:59:24,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:59:24,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:59:24,565 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:59:24,566 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:59:24,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-23 01:59:24,666 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/data/3771e4962/a5d9c18b319e4190a0880cd771d3c839/FLAG32fdf587a [2021-11-23 01:59:25,652 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:59:25,653 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-23 01:59:25,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/data/3771e4962/a5d9c18b319e4190a0880cd771d3c839/FLAG32fdf587a [2021-11-23 01:59:26,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/data/3771e4962/a5d9c18b319e4190a0880cd771d3c839 [2021-11-23 01:59:26,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:59:26,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:59:26,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:59:26,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:59:26,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:59:26,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:59:26" (1/1) ... [2021-11-23 01:59:26,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd2a42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:26, skipping insertion in model container [2021-11-23 01:59:26,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:59:26" (1/1) ... [2021-11-23 01:59:26,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:59:26,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:59:26,640 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-23 01:59:26,647 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-23 01:59:27,678 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,680 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,680 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,682 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,684 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,714 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,718 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,719 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,722 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,724 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,726 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:27,727 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,155 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 01:59:28,157 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 01:59:28,159 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 01:59:28,161 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 01:59:28,163 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 01:59:28,165 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 01:59:28,166 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 01:59:28,167 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 01:59:28,169 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 01:59:28,170 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 01:59:28,358 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 01:59:28,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:59:28,415 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:59:28,434 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-23 01:59:28,435 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-23 01:59:28,501 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,502 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,502 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,503 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,504 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,517 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,518 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,520 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,521 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,523 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,524 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,525 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,525 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:59:28,625 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 01:59:28,627 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 01:59:28,628 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 01:59:28,629 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 01:59:28,631 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 01:59:28,632 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 01:59:28,633 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 01:59:28,634 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 01:59:28,635 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 01:59:28,636 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 01:59:28,673 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 01:59:28,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:59:28,995 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:59:28,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28 WrapperNode [2021-11-23 01:59:28,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:59:28,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:59:28,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:59:28,998 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:59:29,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (1/1) ... [2021-11-23 01:59:29,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (1/1) ... [2021-11-23 01:59:29,143 INFO L137 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 58 [2021-11-23 01:59:29,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:59:29,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:59:29,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:59:29,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:59:29,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (1/1) ... [2021-11-23 01:59:29,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (1/1) ... [2021-11-23 01:59:29,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (1/1) ... [2021-11-23 01:59:29,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (1/1) ... [2021-11-23 01:59:29,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (1/1) ... [2021-11-23 01:59:29,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (1/1) ... [2021-11-23 01:59:29,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (1/1) ... [2021-11-23 01:59:29,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:59:29,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:59:29,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:59:29,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:59:29,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (1/1) ... [2021-11-23 01:59:29,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:59:29,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:29,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:59:29,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:59:29,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 01:59:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 01:59:29,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 01:59:29,313 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-23 01:59:29,313 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-23 01:59:29,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:59:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 01:59:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:59:29,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:59:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 01:59:29,315 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 01:59:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 01:59:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 01:59:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 01:59:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-23 01:59:29,316 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-23 01:59:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:59:29,608 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:59:29,610 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:59:29,920 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:59:30,002 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:59:30,002 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 01:59:30,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:59:30 BoogieIcfgContainer [2021-11-23 01:59:30,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:59:30,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:59:30,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:59:30,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:59:30,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:59:26" (1/3) ... [2021-11-23 01:59:30,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396ef463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:59:30, skipping insertion in model container [2021-11-23 01:59:30,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:59:28" (2/3) ... [2021-11-23 01:59:30,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396ef463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:59:30, skipping insertion in model container [2021-11-23 01:59:30,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:59:30" (3/3) ... [2021-11-23 01:59:30,017 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_next_harness.i [2021-11-23 01:59:30,024 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:59:30,024 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:59:30,094 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:59:30,103 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 01:59:30,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:59:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 01:59:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 01:59:30,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:30,133 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:30,134 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:30,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1641023013, now seen corresponding path program 1 times [2021-11-23 01:59:30,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:30,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855900325] [2021-11-23 01:59:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:30,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:59:31,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:31,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855900325] [2021-11-23 01:59:31,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855900325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:31,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:31,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 01:59:31,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59445116] [2021-11-23 01:59:31,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:31,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:59:31,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:59:31,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:59:31,157 INFO L87 Difference]: Start difference. First operand has 33 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:59:31,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:31,439 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-11-23 01:59:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:59:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 15 [2021-11-23 01:59:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:31,453 INFO L225 Difference]: With dead ends: 62 [2021-11-23 01:59:31,453 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 01:59:31,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:59:31,462 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:31,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 106 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:59:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 01:59:31,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 01:59:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 01:59:31,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-23 01:59:31,521 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2021-11-23 01:59:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:31,522 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-23 01:59:31,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 01:59:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-23 01:59:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 01:59:31,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:31,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:31,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:59:31,527 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1604551445, now seen corresponding path program 1 times [2021-11-23 01:59:31,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:31,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670699214] [2021-11-23 01:59:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:31,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:59:32,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:32,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670699214] [2021-11-23 01:59:32,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670699214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:32,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:32,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 01:59:32,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466298915] [2021-11-23 01:59:32,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:32,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 01:59:32,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:32,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 01:59:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:59:32,025 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 9 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 01:59:32,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:32,353 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-11-23 01:59:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:59:32,354 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2021-11-23 01:59:32,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:32,356 INFO L225 Difference]: With dead ends: 41 [2021-11-23 01:59:32,356 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 01:59:32,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:59:32,361 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:32,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 125 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:59:32,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 01:59:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-23 01:59:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 01:59:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-23 01:59:32,396 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 24 [2021-11-23 01:59:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:32,398 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-23 01:59:32,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 01:59:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-23 01:59:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 01:59:32,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:32,401 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:32,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:59:32,403 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1133002952, now seen corresponding path program 1 times [2021-11-23 01:59:32,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:32,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437798098] [2021-11-23 01:59:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:32,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 01:59:32,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:32,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437798098] [2021-11-23 01:59:32,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437798098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:32,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:32,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:59:32,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954552080] [2021-11-23 01:59:32,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:32,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:59:32,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:32,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:59:32,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:32,658 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 01:59:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:32,837 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-11-23 01:59:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:59:32,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2021-11-23 01:59:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:32,842 INFO L225 Difference]: With dead ends: 45 [2021-11-23 01:59:32,843 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 01:59:32,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:59:32,853 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:32,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 117 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 01:59:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-23 01:59:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 01:59:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-23 01:59:32,885 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 30 [2021-11-23 01:59:32,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:32,886 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-23 01:59:32,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 01:59:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-23 01:59:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 01:59:32,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:32,890 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:32,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:59:32,891 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash 109870167, now seen corresponding path program 1 times [2021-11-23 01:59:32,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:32,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104290131] [2021-11-23 01:59:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:32,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 01:59:33,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:33,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104290131] [2021-11-23 01:59:33,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104290131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:33,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:33,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 01:59:33,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322962589] [2021-11-23 01:59:33,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:33,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 01:59:33,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:33,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 01:59:33,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:59:33,487 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 01:59:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:33,842 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-11-23 01:59:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:59:33,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 39 [2021-11-23 01:59:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:33,845 INFO L225 Difference]: With dead ends: 49 [2021-11-23 01:59:33,845 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 01:59:33,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:59:33,847 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:33,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 126 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:59:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 01:59:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-23 01:59:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 01:59:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-11-23 01:59:33,887 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 39 [2021-11-23 01:59:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:33,888 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-11-23 01:59:33,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 01:59:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-11-23 01:59:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 01:59:33,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:33,901 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:33,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:59:33,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:33,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:33,902 INFO L85 PathProgramCache]: Analyzing trace with hash 178568451, now seen corresponding path program 1 times [2021-11-23 01:59:33,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:33,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162369357] [2021-11-23 01:59:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:33,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 01:59:34,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162369357] [2021-11-23 01:59:34,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162369357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031223752] [2021-11-23 01:59:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:34,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:34,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:34,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:34,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:59:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 01:59:35,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:38,799 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4| Int)) (and (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4|) 0) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4|) 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4| Int)) (not (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4|))) (= .cse0 (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4|)) (.cse2 (+ .cse0 8))) (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| .cse1) .cse2)) (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4| Int)) (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4|)) (.cse7 (+ .cse3 8))) (let ((.cse6 (select (select |c_#memory_$Pointer$.offset| .cse4) .cse7)) (.cse5 (select (select |c_#memory_$Pointer$.base| .cse4) .cse7))) (and (or (not (= .cse3 0)) (not (= .cse4 0))) (= .cse3 (select (select |c_#memory_$Pointer$.offset| .cse5) .cse6)) (= .cse4 (select (select |c_#memory_$Pointer$.base| .cse5) .cse6)) (or (not (= .cse6 0)) (not (= .cse5 0)))))))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4|)) (.cse9 (+ (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4|) 8))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse8) .cse9) 0) (= (select (select |c_#memory_$Pointer$.base| .cse8) .cse9) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4| Int)) (not (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4|))) (= .cse10 (let ((.cse11 (+ (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_next_~node#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_aws_linked_list_next_~node#1.offset_BEFORE_CALL_4|) 8))) (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| .cse10) .cse11)) (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11)))))))) is different from true [2021-11-23 01:59:45,726 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_linked_list_next_~node#1.offset| Int) (|ULTIMATE.start_aws_linked_list_next_~node#1.base| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_next_~node#1.base|) |ULTIMATE.start_aws_linked_list_next_~node#1.offset|)) (.cse4 (+ 8 .cse2))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| .cse3) .cse4)) (.cse1 (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1) .cse2) (or (not (= .cse0 0)) (not (= 0 .cse1))) (or (not (= .cse3 0)) (not (= 0 .cse2))) (= .cse3 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))))))) is different from true [2021-11-23 02:00:21,270 INFO L354 Elim1Store]: treesize reduction 44, result has 63.6 percent of original size [2021-11-23 02:00:21,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 193 [2021-11-23 02:00:21,810 INFO L354 Elim1Store]: treesize reduction 10, result has 88.2 percent of original size [2021-11-23 02:00:21,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 199 [2021-11-23 02:00:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 5 not checked. [2021-11-23 02:00:25,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:00:50,588 WARN L227 SmtUtils]: Spent 15.97s on a formula simplification. DAG size of input: 42 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:01:19,706 WARN L227 SmtUtils]: Spent 7.82s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:01:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:01:25,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031223752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:25,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798735234] [2021-11-23 02:01:25,504 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-23 02:01:25,504 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:25,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:25,519 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:25,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:01:25,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-23 02:01:25,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:25,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:26,079 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-23 02:01:26,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 83 [2021-11-23 02:01:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-23 02:01:26,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:26,497 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-23 02:01:26,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 83 [2021-11-23 02:01:26,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:26,651 INFO L244 Elim1Store]: Index analysis took 103 ms [2021-11-23 02:01:27,324 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-23 02:01:27,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2021-11-23 02:01:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:27,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:01:27,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 23 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 51 [2021-11-23 02:01:29,817 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2021-11-23 02:01:29,907 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-23 02:01:29,915 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 15 for LOIs [2021-11-23 02:01:30,071 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 34 for LOIs [2021-11-23 02:01:30,254 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:01:55,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '937#(and (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 5 |~#s_can_fail_allocator_static~0.base|) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2021-11-23 02:01:55,300 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:01:55,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:01:55,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 16] total 41 [2021-11-23 02:01:55,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519187856] [2021-11-23 02:01:55,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:01:55,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-23 02:01:55,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:01:55,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-23 02:01:55,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=3633, Unknown=14, NotChecked=246, Total=4160 [2021-11-23 02:01:55,308 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 41 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 30 states have internal predecessors, (52), 15 states have call successors, (30), 6 states have call predecessors, (30), 12 states have return successors, (28), 15 states have call predecessors, (28), 13 states have call successors, (28) [2021-11-23 02:02:00,272 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-23 02:02:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:02:00,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 85 SyntacticMatches, 11 SemanticMatches, 64 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 109.1s TimeCoverageRelationStatistics Valid=273, Invalid=3753, Unknown=14, NotChecked=250, Total=4290 [2021-11-23 02:02:00,278 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:00,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 189 Invalid, 0 Unknown, 86 Unchecked, 0.9s Time] [2021-11-23 02:02:00,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-23 02:02:00,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:00,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:00,485 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:192) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:159) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 56 more [2021-11-23 02:02:00,491 INFO L158 Benchmark]: Toolchain (without parser) took 154362.66ms. Allocated memory was 90.2MB in the beginning and 237.0MB in the end (delta: 146.8MB). Free memory was 52.9MB in the beginning and 124.7MB in the end (delta: -71.8MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. [2021-11-23 02:02:00,492 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 90.2MB. Free memory was 58.1MB in the beginning and 58.1MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:02:00,492 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2862.75ms. Allocated memory was 90.2MB in the beginning and 123.7MB in the end (delta: 33.6MB). Free memory was 52.7MB in the beginning and 55.2MB in the end (delta: -2.5MB). Peak memory consumption was 47.9MB. Max. memory is 16.1GB. [2021-11-23 02:02:00,493 INFO L158 Benchmark]: Boogie Procedure Inliner took 147.05ms. Allocated memory is still 123.7MB. Free memory was 55.2MB in the beginning and 50.2MB in the end (delta: 5.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 02:02:00,494 INFO L158 Benchmark]: Boogie Preprocessor took 48.83ms. Allocated memory is still 123.7MB. Free memory was 50.2MB in the beginning and 47.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:02:00,494 INFO L158 Benchmark]: RCFGBuilder took 811.49ms. Allocated memory was 123.7MB in the beginning and 163.6MB in the end (delta: 39.8MB). Free memory was 47.5MB in the beginning and 104.2MB in the end (delta: -56.7MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2021-11-23 02:02:00,495 INFO L158 Benchmark]: TraceAbstraction took 150481.11ms. Allocated memory was 163.6MB in the beginning and 237.0MB in the end (delta: 73.4MB). Free memory was 104.2MB in the beginning and 124.7MB in the end (delta: -20.5MB). Peak memory consumption was 53.6MB. Max. memory is 16.1GB. [2021-11-23 02:02:00,500 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 90.2MB. Free memory was 58.1MB in the beginning and 58.1MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2862.75ms. Allocated memory was 90.2MB in the beginning and 123.7MB in the end (delta: 33.6MB). Free memory was 52.7MB in the beginning and 55.2MB in the end (delta: -2.5MB). Peak memory consumption was 47.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 147.05ms. Allocated memory is still 123.7MB. Free memory was 55.2MB in the beginning and 50.2MB in the end (delta: 5.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.83ms. Allocated memory is still 123.7MB. Free memory was 50.2MB in the beginning and 47.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 811.49ms. Allocated memory was 123.7MB in the beginning and 163.6MB in the end (delta: 39.8MB). Free memory was 47.5MB in the beginning and 104.2MB in the end (delta: -56.7MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * TraceAbstraction took 150481.11ms. Allocated memory was 163.6MB in the beginning and 237.0MB in the end (delta: 73.4MB). Free memory was 104.2MB in the beginning and 124.7MB in the end (delta: -20.5MB). Peak memory consumption was 53.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V --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 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:02:03,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:02:03,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:02:03,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:02:03,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:02:03,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:02:03,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:02:03,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:02:03,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:02:03,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:02:03,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:02:03,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:02:03,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:02:03,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:02:03,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:02:03,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:02:03,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:02:03,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:02:03,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:02:03,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:02:03,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:02:03,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:02:03,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:02:03,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:02:03,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:02:03,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:02:03,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:02:03,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:02:03,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:02:03,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:02:03,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:02:03,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:02:03,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:02:03,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:02:03,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:02:03,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:02:03,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:02:03,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:02:03,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:02:03,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:02:03,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:02:03,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-23 02:02:03,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:02:03,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:02:03,792 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:02:03,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:02:03,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:02:03,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:02:03,795 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:02:03,795 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:02:03,795 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:02:03,796 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:02:03,797 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:02:03,797 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:02:03,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:02:03,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:02:03,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:02:03,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:02:03,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:02:03,801 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:02:03,801 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:02:03,801 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:02:03,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:02:03,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:02:03,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:02:03,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:02:03,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:02:03,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:02:03,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:02:03,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:02:03,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:02:03,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:02:03,805 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:02:03,805 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:02:03,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:02:03,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:02:03,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:02:03,807 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e [2021-11-23 02:02:04,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:02:04,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:02:04,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:02:04,370 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:02:04,371 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:02:04,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-23 02:02:04,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/data/c671d16bf/fb87ffc5a3104556bdc25a0013a665cb/FLAGd0cda392e [2021-11-23 02:02:05,547 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:02:05,552 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-23 02:02:05,613 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/data/c671d16bf/fb87ffc5a3104556bdc25a0013a665cb/FLAGd0cda392e [2021-11-23 02:02:05,967 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/data/c671d16bf/fb87ffc5a3104556bdc25a0013a665cb [2021-11-23 02:02:05,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:02:05,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:02:05,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:02:05,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:02:05,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:02:05,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:02:05" (1/1) ... [2021-11-23 02:02:05,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523ff8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:05, skipping insertion in model container [2021-11-23 02:02:05,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:02:05" (1/1) ... [2021-11-23 02:02:06,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:02:06,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:02:06,530 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-23 02:02:06,538 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-23 02:02:07,707 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,711 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,713 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,743 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,744 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,752 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,757 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,762 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,765 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:07,767 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,437 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:02:08,439 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:02:08,441 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:02:08,443 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:02:08,445 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:02:08,446 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:02:08,447 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:02:08,448 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:02:08,449 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:02:08,450 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:02:08,737 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:02:08,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:02:08,828 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:02:08,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:02:08,873 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-23 02:02:08,874 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-23 02:02:08,964 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,965 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,965 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,966 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,967 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,986 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,988 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,991 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,992 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,998 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:08,999 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,000 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,001 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,101 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:02:09,102 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:02:09,104 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:02:09,106 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:02:09,114 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:02:09,115 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:02:09,116 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:02:09,117 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:02:09,118 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:02:09,119 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:02:09,179 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:02:09,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:02:09,248 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:02:09,280 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-23 02:02:09,290 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_266603b6-a18f-45ad-9dde-0577dcbf0e1e/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-23 02:02:09,376 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,386 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,387 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,387 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,388 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,397 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,397 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,399 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,400 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,401 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,402 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,403 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,403 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:02:09,446 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:02:09,448 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:02:09,449 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:02:09,450 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:02:09,481 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:02:09,482 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:02:09,483 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:02:09,483 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:02:09,484 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:02:09,484 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:02:09,523 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:02:09,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:02:09,977 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:02:09,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09 WrapperNode [2021-11-23 02:02:09,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:02:09,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:02:09,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:02:09,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:02:09,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (1/1) ... [2021-11-23 02:02:10,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (1/1) ... [2021-11-23 02:02:10,172 INFO L137 Inliner]: procedures = 698, calls = 1039, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 59 [2021-11-23 02:02:10,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:02:10,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:02:10,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:02:10,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:02:10,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (1/1) ... [2021-11-23 02:02:10,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (1/1) ... [2021-11-23 02:02:10,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (1/1) ... [2021-11-23 02:02:10,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (1/1) ... [2021-11-23 02:02:10,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (1/1) ... [2021-11-23 02:02:10,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (1/1) ... [2021-11-23 02:02:10,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (1/1) ... [2021-11-23 02:02:10,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:02:10,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:02:10,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:02:10,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:02:10,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (1/1) ... [2021-11-23 02:02:10,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:02:10,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:10,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:02:10,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:02:10,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:02:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:02:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:02:10,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:02:10,372 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-23 02:02:10,373 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-23 02:02:10,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:02:10,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:02:10,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:02:10,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:02:10,375 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:02:10,376 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:02:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:02:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:02:10,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:02:10,377 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-23 02:02:10,378 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-23 02:02:10,722 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:02:10,725 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:02:11,000 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:02:11,010 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:02:11,011 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:02:11,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:02:11 BoogieIcfgContainer [2021-11-23 02:02:11,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:02:11,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:02:11,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:02:11,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:02:11,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:02:05" (1/3) ... [2021-11-23 02:02:11,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6441f6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:02:11, skipping insertion in model container [2021-11-23 02:02:11,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:09" (2/3) ... [2021-11-23 02:02:11,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6441f6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:02:11, skipping insertion in model container [2021-11-23 02:02:11,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:02:11" (3/3) ... [2021-11-23 02:02:11,024 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_next_harness.i [2021-11-23 02:02:11,031 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:02:11,032 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:02:11,122 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:02:11,131 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:02:11,131 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:02:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 02:02:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:02:11,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:11,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:11,165 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:11,173 INFO L85 PathProgramCache]: Analyzing trace with hash 829036907, now seen corresponding path program 1 times [2021-11-23 02:02:11,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:02:11,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398510008] [2021-11-23 02:02:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:11,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:02:11,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:02:11,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:02:11,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:02:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:11,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 02:02:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:11,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:02:11,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:02:11,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398510008] [2021-11-23 02:02:11,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398510008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:11,759 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:11,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:02:11,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623478381] [2021-11-23 02:02:11,763 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:11,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:02:11,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:02:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:02:11,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:02:11,823 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:02:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:11,870 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2021-11-23 02:02:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:02:11,875 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-11-23 02:02:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:11,895 INFO L225 Difference]: With dead ends: 94 [2021-11-23 02:02:11,895 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 02:02:11,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:02:11,908 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:11,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:02:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 02:02:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-23 02:02:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 02:02:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-23 02:02:11,978 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 28 [2021-11-23 02:02:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:11,980 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-23 02:02:11,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:02:11,981 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-23 02:02:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:02:11,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:11,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:12,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:12,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:02:12,204 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash -192031447, now seen corresponding path program 1 times [2021-11-23 02:02:12,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:02:12,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66117840] [2021-11-23 02:02:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:12,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:02:12,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:02:12,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:02:12,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:02:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:12,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 02:02:12,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:15,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:31,614 WARN L227 SmtUtils]: Spent 10.84s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:02:56,981 WARN L227 SmtUtils]: Spent 14.21s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:03:05,074 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:03:05,084 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-23 02:03:05,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2021-11-23 02:03:06,587 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-23 02:03:06,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-23 02:03:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:03:12,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:03:12,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66117840] [2021-11-23 02:03:12,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66117840] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:03:12,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:03:12,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 29 [2021-11-23 02:03:12,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997780359] [2021-11-23 02:03:12,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:12,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:03:12,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:03:12,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:03:12,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=726, Unknown=1, NotChecked=0, Total=812 [2021-11-23 02:03:12,075 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:03:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:15,086 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2021-11-23 02:03:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:03:15,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-11-23 02:03:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:15,093 INFO L225 Difference]: With dead ends: 84 [2021-11-23 02:03:15,093 INFO L226 Difference]: Without dead ends: 82 [2021-11-23 02:03:15,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=105, Invalid=886, Unknown=1, NotChecked=0, Total=992 [2021-11-23 02:03:15,096 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 29 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:15,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 856 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 92 Unchecked, 2.0s Time] [2021-11-23 02:03:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-23 02:03:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-11-23 02:03:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 45 states have internal predecessors, (49), 15 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-23 02:03:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-11-23 02:03:15,119 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 28 [2021-11-23 02:03:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:15,120 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-11-23 02:03:15,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:03:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-11-23 02:03:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:03:15,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:15,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:15,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 02:03:15,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:03:15,328 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1001378073, now seen corresponding path program 1 times [2021-11-23 02:03:15,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:03:15,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2513279] [2021-11-23 02:03:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:15,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:03:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:03:15,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:03:15,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:03:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:15,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:03:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:20,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:24,404 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-23 02:03:24,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-23 02:03:24,446 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:03:24,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-23 02:03:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:03:24,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:03:24,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2513279] [2021-11-23 02:03:24,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2513279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:03:24,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1991907731] [2021-11-23 02:03:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:24,497 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:03:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:03:24,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:03:24,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 02:03:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:24,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:03:24,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:32,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:34,956 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-23 02:03:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-23 02:03:34,993 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:03:34,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-23 02:03:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:03:35,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1991907731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:03:35,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849203805] [2021-11-23 02:03:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:35,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:03:35,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:03:35,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:03:35,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:03:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:03:35,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:03:37,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:40,062 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-23 02:03:40,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-23 02:03:40,102 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:03:40,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-23 02:03:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:03:40,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849203805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:03:40,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:03:40,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13, 11, 12, 11] total 27 [2021-11-23 02:03:40,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016468808] [2021-11-23 02:03:40,153 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:03:40,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 02:03:40,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:03:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 02:03:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:03:40,157 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 27 states have internal predecessors, (47), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:03:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:50,988 INFO L93 Difference]: Finished difference Result 162 states and 216 transitions. [2021-11-23 02:03:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 02:03:50,989 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 27 states have internal predecessors, (47), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 28 [2021-11-23 02:03:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:50,996 INFO L225 Difference]: With dead ends: 162 [2021-11-23 02:03:50,996 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 02:03:50,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:03:51,002 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 62 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:51,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 505 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 299 Invalid, 0 Unknown, 171 Unchecked, 3.0s Time] [2021-11-23 02:03:51,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 02:03:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 77. [2021-11-23 02:03:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 55 states have internal predecessors, (59), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2021-11-23 02:03:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2021-11-23 02:03:51,036 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 28 [2021-11-23 02:03:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:51,037 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2021-11-23 02:03:51,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 27 states have internal predecessors, (47), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:03:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2021-11-23 02:03:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:03:51,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:51,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:51,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 02:03:51,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:51,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:51,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:03:51,644 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1394405083, now seen corresponding path program 1 times [2021-11-23 02:03:51,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:03:51,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449477795] [2021-11-23 02:03:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:51,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:03:51,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:03:51,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:03:51,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:03:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:51,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:03:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:03:52,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:03:53,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:03:53,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449477795] [2021-11-23 02:03:53,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449477795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:03:53,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:03:53,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 02:03:53,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103618430] [2021-11-23 02:03:53,109 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:03:53,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:03:53,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:03:53,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:03:53,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:03:53,111 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:03:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:53,386 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2021-11-23 02:03:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:03:53,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-23 02:03:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:53,390 INFO L225 Difference]: With dead ends: 149 [2021-11-23 02:03:53,390 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 02:03:53,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:03:53,393 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:53,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 191 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:03:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 02:03:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-11-23 02:03:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-23 02:03:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-11-23 02:03:53,409 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 28 [2021-11-23 02:03:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:53,410 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-11-23 02:03:53,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:03:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-11-23 02:03:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:03:53,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:53,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:53,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:53,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:03:53,636 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash 854159971, now seen corresponding path program 1 times [2021-11-23 02:03:53,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:03:53,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134598865] [2021-11-23 02:03:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:53,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:03:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:03:53,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:03:53,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:03:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:53,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 02:03:53,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:03,470 INFO L354 Elim1Store]: treesize reduction 192, result has 28.1 percent of original size [2021-11-23 02:04:03,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 237 treesize of output 189 [2021-11-23 02:04:04,681 INFO L354 Elim1Store]: treesize reduction 47, result has 59.8 percent of original size [2021-11-23 02:04:04,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 157 [2021-11-23 02:04:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:04:05,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:14,218 WARN L227 SmtUtils]: Spent 12.59s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:05:14,220 INFO L354 Elim1Store]: treesize reduction 25, result has 84.3 percent of original size [2021-11-23 02:05:14,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 203 [2021-11-23 02:05:20,075 WARN L227 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 66 DAG size of output: 55 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:05:20,076 INFO L354 Elim1Store]: treesize reduction 23, result has 79.3 percent of original size [2021-11-23 02:05:20,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 220 [2021-11-23 02:06:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:06:17,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:17,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134598865] [2021-11-23 02:06:17,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134598865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:17,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1977380056] [2021-11-23 02:06:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:17,976 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:17,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:17,978 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:17,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 02:06:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 02:06:18,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:05,797 INFO L354 Elim1Store]: treesize reduction 97, result has 41.2 percent of original size [2021-11-23 02:07:05,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 237 treesize of output 182 [2021-11-23 02:07:07,872 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-23 02:07:07,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 143 treesize of output 137 [2021-11-23 02:07:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:08,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:19,743 INFO L354 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2021-11-23 02:07:19,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 1 [2021-11-23 02:07:31,870 WARN L227 SmtUtils]: Spent 11.65s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:07:31,871 INFO L354 Elim1Store]: treesize reduction 25, result has 84.3 percent of original size [2021-11-23 02:07:31,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 203 [2021-11-23 02:07:36,375 INFO L354 Elim1Store]: treesize reduction 23, result has 79.3 percent of original size [2021-11-23 02:07:36,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 220 [2021-11-23 02:07:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:07:53,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1977380056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:53,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861747683] [2021-11-23 02:07:53,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:53,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:53,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:53,335 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:53,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:07:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 02:07:53,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:53,789 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 02:07:53,789 INFO L388 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 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-23 02:07:54,077 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 02:07:54,078 INFO L388 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 1 case distinctions, treesize of input 51 treesize of output 38 [2021-11-23 02:07:54,122 INFO L388 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 48 treesize of output 42 [2021-11-23 02:08:39,708 INFO L354 Elim1Store]: treesize reduction 152, result has 25.1 percent of original size [2021-11-23 02:08:39,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 243 treesize of output 175 [2021-11-23 02:08:41,411 INFO L354 Elim1Store]: treesize reduction 130, result has 23.1 percent of original size [2021-11-23 02:08:41,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 159 treesize of output 127 [2021-11-23 02:08:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:08:41,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:08:50,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861747683] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:50,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 02:08:50,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17, 16, 21, 16, 15] total 51 [2021-11-23 02:08:50,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2851667] [2021-11-23 02:08:50,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:50,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:08:50,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:08:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:08:50,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2331, Unknown=17, NotChecked=0, Total=2550 [2021-11-23 02:08:50,171 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 02:09:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:12,559 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2021-11-23 02:09:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:09:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-11-23 02:09:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:12,567 INFO L225 Difference]: With dead ends: 72 [2021-11-23 02:09:12,567 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 02:09:12,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 183 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 145.3s TimeCoverageRelationStatistics Valid=226, Invalid=2832, Unknown=22, NotChecked=0, Total=3080 [2021-11-23 02:09:12,571 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:12,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 294 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 196 Invalid, 0 Unknown, 40 Unchecked, 5.4s Time] [2021-11-23 02:09:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 02:09:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-11-23 02:09:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 49 states have internal predecessors, (52), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-23 02:09:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-11-23 02:09:12,586 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 42 [2021-11-23 02:09:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:12,586 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-11-23 02:09:12,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 02:09:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-11-23 02:09:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:09:12,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:12,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:12,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-23 02:09:12,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 02:09:13,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:13,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:09:13,194 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash 44813345, now seen corresponding path program 1 times [2021-11-23 02:09:13,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:09:13,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160748171] [2021-11-23 02:09:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:13,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:09:13,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:09:13,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:09:13,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 02:09:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:13,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:09:13,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:17,668 INFO L388 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 36 treesize of output 28 [2021-11-23 02:09:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:30,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:45,596 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 02:09:45,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2021-11-23 02:09:50,290 INFO L354 Elim1Store]: treesize reduction 29, result has 71.8 percent of original size [2021-11-23 02:09:50,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2021-11-23 02:09:50,387 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:09:50,387 INFO L388 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 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-23 02:09:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:09:52,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:09:52,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160748171] [2021-11-23 02:09:52,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160748171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:09:52,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1228672763] [2021-11-23 02:09:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:52,221 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:09:52,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:09:52,223 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:09:52,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 02:09:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:52,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 02:09:52,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:57,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 25 treesize of output 17 [2021-11-23 02:10:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:19,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:28,493 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 02:10:28,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2021-11-23 02:10:30,875 INFO L354 Elim1Store]: treesize reduction 29, result has 71.8 percent of original size [2021-11-23 02:10:30,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2021-11-23 02:10:30,968 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:10:30,968 INFO L388 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 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-23 02:10:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:10:31,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1228672763] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:31,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844960565] [2021-11-23 02:10:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:31,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:31,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:31,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:31,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:10:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:31,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:10:31,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:32,310 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 02:10:32,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-23 02:10:32,600 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 02:10:32,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 38 [2021-11-23 02:10:32,645 INFO L388 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 48 treesize of output 42 [2021-11-23 02:10:51,334 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-23 02:10:51,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2021-11-23 02:11:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:16,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:11:20,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844960565] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:20,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 02:11:20,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 15, 18, 15, 10] total 47 [2021-11-23 02:11:20,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456661273] [2021-11-23 02:11:20,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:20,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:11:20,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:11:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:11:20,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1951, Unknown=3, NotChecked=0, Total=2162 [2021-11-23 02:11:20,186 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:11:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:26,572 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2021-11-23 02:11:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:11:26,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-11-23 02:11:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:26,576 INFO L225 Difference]: With dead ends: 115 [2021-11-23 02:11:26,576 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 02:11:26,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 188 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 77.0s TimeCoverageRelationStatistics Valid=231, Invalid=2216, Unknown=3, NotChecked=0, Total=2450 [2021-11-23 02:11:26,579 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 29 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:26,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 02:11:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 02:11:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-11-23 02:11:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.14) internal successors, (57), 54 states have internal predecessors, (57), 13 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-23 02:11:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2021-11-23 02:11:26,594 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 42 [2021-11-23 02:11:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:26,595 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2021-11-23 02:11:26,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:11:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2021-11-23 02:11:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:11:26,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:26,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:26,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:26,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:27,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 02:11:27,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:11:27,198 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:27,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:27,199 INFO L85 PathProgramCache]: Analyzing trace with hash -348213665, now seen corresponding path program 1 times [2021-11-23 02:11:27,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:11:27,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144490315] [2021-11-23 02:11:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:27,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:11:27,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:11:27,201 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:11:27,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 02:11:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:27,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:11:27,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:32,121 INFO L388 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 32 treesize of output 24 [2021-11-23 02:11:32,165 INFO L388 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 21 treesize of output 13 [2021-11-23 02:11:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:11:35,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:43,359 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-23 02:11:43,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-23 02:11:43,454 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:11:43,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-23 02:11:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:11:43,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:11:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144490315] [2021-11-23 02:11:43,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144490315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [343991145] [2021-11-23 02:11:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:43,575 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:11:43,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:11:43,576 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:11:43,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 02:11:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:43,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 02:11:43,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:51,893 INFO L388 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 32 treesize of output 24 [2021-11-23 02:11:51,935 INFO L388 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 21 treesize of output 13 [2021-11-23 02:11:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:11:53,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:59,602 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-23 02:11:59,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-23 02:11:59,712 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:11:59,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-23 02:11:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:11:59,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [343991145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:59,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215460366] [2021-11-23 02:11:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:59,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:59,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:59,858 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:59,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:11:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:59,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:12:00,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:02,875 INFO L388 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 32 treesize of output 24 [2021-11-23 02:12:02,923 INFO L388 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 21 treesize of output 13 [2021-11-23 02:12:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:12:04,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:10,692 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-23 02:12:10,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-23 02:12:10,786 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 02:12:10,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-23 02:12:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:12:10,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215460366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:10,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:12:10,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12, 10, 11, 10] total 19 [2021-11-23 02:12:10,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839165563] [2021-11-23 02:12:10,907 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:12:10,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:12:10,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:12:10,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:12:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:12:10,910 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 02:12:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:25,025 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2021-11-23 02:12:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:12:25,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2021-11-23 02:12:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:25,029 INFO L225 Difference]: With dead ends: 136 [2021-11-23 02:12:25,029 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 02:12:25,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:12:25,031 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 80 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:25,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 361 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 290 Invalid, 0 Unknown, 63 Unchecked, 6.6s Time] [2021-11-23 02:12:25,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 02:12:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-11-23 02:12:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 54 states have internal predecessors, (59), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:12:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-11-23 02:12:25,050 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 42 [2021-11-23 02:12:25,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:25,051 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-11-23 02:12:25,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 02:12:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-11-23 02:12:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:12:25,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:25,053 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:25,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:25,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 02:12:25,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:25,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:12:25,674 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash -541770688, now seen corresponding path program 1 times [2021-11-23 02:12:25,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:12:25,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210453184] [2021-11-23 02:12:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:25,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:12:25,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:12:25,678 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:12:25,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 02:12:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:25,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:12:25,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:26,667 INFO L388 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 29 treesize of output 21 [2021-11-23 02:12:26,709 INFO L388 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 18 treesize of output 10 [2021-11-23 02:12:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:12:27,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:12:28,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:12:28,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210453184] [2021-11-23 02:12:28,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210453184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:28,771 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:28,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-23 02:12:28,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585383312] [2021-11-23 02:12:28,771 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:28,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:12:28,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:12:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:12:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:28,773 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:12:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:30,848 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-23 02:12:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:12:30,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-11-23 02:12:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:30,851 INFO L225 Difference]: With dead ends: 80 [2021-11-23 02:12:30,851 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 02:12:30,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:12:30,852 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 10 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:30,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 314 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 02:12:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 02:12:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-23 02:12:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:12:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-11-23 02:12:30,866 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 48 [2021-11-23 02:12:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:30,867 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-11-23 02:12:30,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:12:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-11-23 02:12:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 02:12:30,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:30,870 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:30,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:31,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:12:31,090 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash -266250434, now seen corresponding path program 1 times [2021-11-23 02:12:31,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:12:31,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683524713] [2021-11-23 02:12:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:31,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:12:31,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:12:31,092 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:12:31,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266603b6-a18f-45ad-9dde-0577dcbf0e1e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 02:12:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:31,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 02:12:31,318 INFO L286 TraceCheckSpWp]: Computing forward predicates...