./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/memset_override_0_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/memset_override_0_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P --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 5db0d3c47797ff0a215821e8d5fa38ab9190be93d125d3ffd24136b371560f6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:57:21,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:57:21,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:57:21,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:57:21,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:57:21,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:57:21,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:57:21,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:57:21,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:57:21,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:57:21,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:57:21,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:57:21,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:57:21,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:57:21,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:57:21,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:57:21,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:57:21,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:57:21,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:57:21,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:57:21,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:57:21,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:57:21,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:57:21,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:57:21,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:57:21,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:57:21,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:57:21,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:57:21,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:57:21,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:57:21,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:57:21,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:57:21,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:57:21,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:57:21,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:57:21,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:57:21,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:57:21,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:57:21,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:57:21,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:57:21,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:57:21,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:57:21,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:57:21,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:57:21,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:57:21,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:57:21,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:57:21,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:57:21,210 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:57:21,210 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:57:21,210 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:57:21,211 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:57:21,212 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:57:21,212 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:57:21,212 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:57:21,212 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:57:21,212 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:57:21,213 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:57:21,213 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:57:21,213 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:57:21,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:57:21,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:57:21,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:57:21,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:57:21,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:57:21,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:57:21,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:57:21,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:57:21,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:57:21,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:57:21,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:57:21,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:57:21,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:57:21,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:57:21,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:57:21,219 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:57:21,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:57:21,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:57:21,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:57:21,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:57:21,221 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5db0d3c47797ff0a215821e8d5fa38ab9190be93d125d3ffd24136b371560f6c [2021-11-20 23:57:21,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:57:21,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:57:21,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:57:21,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:57:21,527 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:57:21,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/memset_override_0_harness.i [2021-11-20 23:57:21,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/data/997cd55f2/094f7ec91bde42478edf3f17ad906f7e/FLAGed1e05178 [2021-11-20 23:57:22,249 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:57:22,250 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i [2021-11-20 23:57:22,301 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/data/997cd55f2/094f7ec91bde42478edf3f17ad906f7e/FLAGed1e05178 [2021-11-20 23:57:22,406 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/data/997cd55f2/094f7ec91bde42478edf3f17ad906f7e [2021-11-20 23:57:22,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:57:22,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:57:22,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:57:22,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:57:22,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:57:22,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:57:22" (1/1) ... [2021-11-20 23:57:22,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53144353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:22, skipping insertion in model container [2021-11-20 23:57:22,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:57:22" (1/1) ... [2021-11-20 23:57:22,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:57:22,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:57:22,810 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4491,4504] [2021-11-20 23:57:22,816 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4551,4564] [2021-11-20 23:57:23,509 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,510 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,511 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,511 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,513 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,527 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,527 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,529 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,530 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,532 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,533 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,534 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,534 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,693 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:57:23,694 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:57:23,695 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:57:23,696 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:57:23,698 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:57:23,699 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:57:23,699 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:57:23,700 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:57:23,701 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:57:23,702 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:57:23,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:57:23,778 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:57:23,791 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4491,4504] [2021-11-20 23:57:23,792 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4551,4564] [2021-11-20 23:57:23,839 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,840 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,840 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,841 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,842 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,851 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,852 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,853 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,853 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,855 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,856 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,856 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,857 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:23,883 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:57:23,884 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:57:23,885 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:57:23,886 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:57:23,891 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:57:23,893 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:57:23,894 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:57:23,895 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:57:23,896 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:57:23,897 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:57:23,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:57:24,123 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:57:24,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24 WrapperNode [2021-11-20 23:57:24,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:57:24,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:57:24,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:57:24,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:57:24,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (1/1) ... [2021-11-20 23:57:24,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (1/1) ... [2021-11-20 23:57:24,231 INFO L137 Inliner]: procedures = 592, calls = 609, calls flagged for inlining = 38, calls inlined = 6, statements flattened = 85 [2021-11-20 23:57:24,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:57:24,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:57:24,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:57:24,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:57:24,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (1/1) ... [2021-11-20 23:57:24,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (1/1) ... [2021-11-20 23:57:24,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (1/1) ... [2021-11-20 23:57:24,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (1/1) ... [2021-11-20 23:57:24,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (1/1) ... [2021-11-20 23:57:24,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (1/1) ... [2021-11-20 23:57:24,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (1/1) ... [2021-11-20 23:57:24,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:57:24,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:57:24,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:57:24,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:57:24,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (1/1) ... [2021-11-20 23:57:24,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:57:24,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:24,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:57:24,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:57:24,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:57:24,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:57:24,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:57:24,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:57:24,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:57:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:57:24,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:57:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:57:24,426 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:57:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:57:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2021-11-20 23:57:24,427 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2021-11-20 23:57:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 23:57:24,427 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 23:57:24,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:57:24,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:57:24,650 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:57:24,652 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:57:24,966 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:57:25,005 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:57:25,005 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:57:25,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:57:25 BoogieIcfgContainer [2021-11-20 23:57:25,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:57:25,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:57:25,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:57:25,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:57:25,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:57:22" (1/3) ... [2021-11-20 23:57:25,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31834abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:57:25, skipping insertion in model container [2021-11-20 23:57:25,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:24" (2/3) ... [2021-11-20 23:57:25,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31834abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:57:25, skipping insertion in model container [2021-11-20 23:57:25,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:57:25" (3/3) ... [2021-11-20 23:57:25,017 INFO L111 eAbstractionObserver]: Analyzing ICFG memset_override_0_harness.i [2021-11-20 23:57:25,022 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:57:25,022 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:57:25,071 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:57:25,078 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 [2021-11-20 23:57:25,078 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:57:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 23:57:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:57:25,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:25,101 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:25,102 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1342933705, now seen corresponding path program 1 times [2021-11-20 23:57:25,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:25,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55705393] [2021-11-20 23:57:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:25,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 23:57:25,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:25,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55705393] [2021-11-20 23:57:25,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55705393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:25,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105099711] [2021-11-20 23:57:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:25,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:25,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:25,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:25,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:57:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:25,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 23:57:25,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 23:57:26,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 23:57:26,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105099711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:26,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101543117] [2021-11-20 23:57:26,799 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-20 23:57:26,799 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:57:26,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:57:26,818 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:57:26,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:57:26,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:26,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:26,976 INFO L354 Elim1Store]: treesize reduction 83, result has 33.6 percent of original size [2021-11-20 23:57:26,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 64 [2021-11-20 23:57:27,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:27,157 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-20 23:57:27,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2021-11-20 23:57:29,560 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2021-11-20 23:57:29,605 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-20 23:57:29,624 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:57:30,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [101543117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:30,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:57:30,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 7, 8] total 23 [2021-11-20 23:57:30,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640889731] [2021-11-20 23:57:30,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:30,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 23:57:30,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:30,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 23:57:30,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:57:30,590 INFO L87 Difference]: Start difference. First operand has 48 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 13 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 23:57:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:31,096 INFO L93 Difference]: Finished difference Result 108 states and 152 transitions. [2021-11-20 23:57:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 23:57:31,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2021-11-20 23:57:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:31,107 INFO L225 Difference]: With dead ends: 108 [2021-11-20 23:57:31,107 INFO L226 Difference]: Without dead ends: 66 [2021-11-20 23:57:31,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:57:31,114 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 96 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:31,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 189 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:57:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-20 23:57:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-11-20 23:57:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 23:57:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-11-20 23:57:31,162 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 24 [2021-11-20 23:57:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:31,163 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-11-20 23:57:31,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 23:57:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-11-20 23:57:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 23:57:31,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:31,166 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:31,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:31,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 23:57:31,377 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:31,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1152670264, now seen corresponding path program 1 times [2021-11-20 23:57:31,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:31,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774948352] [2021-11-20 23:57:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:31,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 23:57:31,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774948352] [2021-11-20 23:57:31,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774948352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:31,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:31,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:57:31,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622641528] [2021-11-20 23:57:31,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:31,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:57:31,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:57:31,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:57:31,589 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:57:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:31,629 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2021-11-20 23:57:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:57:31,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2021-11-20 23:57:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:31,633 INFO L225 Difference]: With dead ends: 89 [2021-11-20 23:57:31,636 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 23:57:31,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:57:31,639 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:31,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:57:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 23:57:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-20 23:57:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 23:57:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-11-20 23:57:31,680 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 25 [2021-11-20 23:57:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:31,682 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-11-20 23:57:31,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:57:31,682 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-11-20 23:57:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:57:31,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:31,684 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:31,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:57:31,685 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1319363776, now seen corresponding path program 1 times [2021-11-20 23:57:31,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:31,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755629561] [2021-11-20 23:57:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:31,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:57:31,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:57:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755629561] [2021-11-20 23:57:31,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755629561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:57:31,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453808265] [2021-11-20 23:57:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:31,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:31,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:31,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:31,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:57:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:31,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:57:31,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 23:57:32,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:57:32,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453808265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:32,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [368721843] [2021-11-20 23:57:32,495 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-20 23:57:32,496 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:57:32,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:57:32,496 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:57:32,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:57:32,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:32,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:32,601 INFO L354 Elim1Store]: treesize reduction 83, result has 33.6 percent of original size [2021-11-20 23:57:32,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 64 [2021-11-20 23:57:32,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:32,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:32,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:32,747 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-20 23:57:32,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2021-11-20 23:57:34,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:57:34,108 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 0 case distinctions, treesize of input 27 treesize of output 1 [2021-11-20 23:57:34,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:57:34,218 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:57:34,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:57:34,279 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 0 case distinctions, treesize of input 27 treesize of output 1 [2021-11-20 23:57:34,303 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 0 case distinctions, treesize of input 27 treesize of output 1 [2021-11-20 23:57:34,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:34,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:34,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:34,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:34,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 284 [2021-11-20 23:57:34,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:34,531 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-20 23:57:34,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:57:34,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:34,641 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 0 case distinctions, treesize of input 42 treesize of output 21 [2021-11-20 23:57:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:57:34,701 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 0 case distinctions, treesize of input 160 treesize of output 129 [2021-11-20 23:57:34,989 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 0 case distinctions, treesize of input 27 treesize of output 1 [2021-11-20 23:57:35,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:57:35,139 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 0 case distinctions, treesize of input 27 treesize of output 1 [2021-11-20 23:57:35,179 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 0 case distinctions, treesize of input 27 treesize of output 1 [2021-11-20 23:57:35,290 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 0 case distinctions, treesize of input 29 treesize of output 1 [2021-11-20 23:57:35,306 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 0 case distinctions, treesize of input 27 treesize of output 1 [2021-11-20 23:57:35,352 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 0 case distinctions, treesize of input 27 treesize of output 1 [2021-11-20 23:57:35,365 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 0 case distinctions, treesize of input 29 treesize of output 1 [2021-11-20 23:57:35,383 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 0 case distinctions, treesize of input 27 treesize of output 1 [2021-11-20 23:57:35,395 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 0 case distinctions, treesize of input 29 treesize of output 1 [2021-11-20 23:57:35,435 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:57:35,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:57:35,484 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 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 23:57:35,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:57:36,921 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2021-11-20 23:57:36,943 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-20 23:57:36,962 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:57:38,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [368721843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:38,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:57:38,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 10, 7] total 27 [2021-11-20 23:57:38,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081329536] [2021-11-20 23:57:38,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:38,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 23:57:38,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:57:38,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 23:57:38,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-11-20 23:57:38,666 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 23:57:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:40,802 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2021-11-20 23:57:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 23:57:40,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 26 [2021-11-20 23:57:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:40,804 INFO L225 Difference]: With dead ends: 73 [2021-11-20 23:57:40,804 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 23:57:40,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-11-20 23:57:40,806 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 36 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:40,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 233 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 23:57:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 23:57:40,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2021-11-20 23:57:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:57:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2021-11-20 23:57:40,819 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 26 [2021-11-20 23:57:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:40,819 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2021-11-20 23:57:40,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 23:57:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2021-11-20 23:57:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:57:40,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:40,820 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:40,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:41,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:41,021 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash -16112764, now seen corresponding path program 1 times [2021-11-20 23:57:41,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:57:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699035083] [2021-11-20 23:57:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:41,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:57:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:57:41,069 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:57:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:57:41,133 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-20 23:57:41,134 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:57:41,135 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:57:41,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:57:41,140 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-20 23:57:41,142 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:57:41,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:57:41 BoogieIcfgContainer [2021-11-20 23:57:41,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:57:41,174 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:57:41,174 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:57:41,174 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:57:41,175 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:57:25" (3/4) ... [2021-11-20 23:57:41,178 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 23:57:41,178 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:57:41,179 INFO L158 Benchmark]: Toolchain (without parser) took 18765.96ms. Allocated memory was 113.2MB in the beginning and 255.9MB in the end (delta: 142.6MB). Free memory was 74.4MB in the beginning and 151.7MB in the end (delta: -77.3MB). Peak memory consumption was 65.3MB. Max. memory is 16.1GB. [2021-11-20 23:57:41,179 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 77.6MB. Free memory was 51.4MB in the beginning and 51.4MB in the end (delta: 24.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:57:41,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1708.91ms. Allocated memory is still 113.2MB. Free memory was 74.1MB in the beginning and 50.9MB in the end (delta: 23.2MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. [2021-11-20 23:57:41,180 INFO L158 Benchmark]: Boogie Procedure Inliner took 106.43ms. Allocated memory is still 113.2MB. Free memory was 50.9MB in the beginning and 46.3MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 23:57:41,180 INFO L158 Benchmark]: Boogie Preprocessor took 38.59ms. Allocated memory is still 113.2MB. Free memory was 46.3MB in the beginning and 44.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:57:41,180 INFO L158 Benchmark]: RCFGBuilder took 736.97ms. Allocated memory is still 113.2MB. Free memory was 44.2MB in the beginning and 63.9MB in the end (delta: -19.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 23:57:41,181 INFO L158 Benchmark]: TraceAbstraction took 16163.56ms. Allocated memory was 113.2MB in the beginning and 255.9MB in the end (delta: 142.6MB). Free memory was 63.2MB in the beginning and 151.7MB in the end (delta: -88.4MB). Peak memory consumption was 54.0MB. Max. memory is 16.1GB. [2021-11-20 23:57:41,181 INFO L158 Benchmark]: Witness Printer took 4.12ms. Allocated memory is still 255.9MB. Free memory is still 151.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:57:41,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 77.6MB. Free memory was 51.4MB in the beginning and 51.4MB in the end (delta: 24.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1708.91ms. Allocated memory is still 113.2MB. Free memory was 74.1MB in the beginning and 50.9MB in the end (delta: 23.2MB). Peak memory consumption was 44.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 106.43ms. Allocated memory is still 113.2MB. Free memory was 50.9MB in the beginning and 46.3MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.59ms. Allocated memory is still 113.2MB. Free memory was 46.3MB in the beginning and 44.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 736.97ms. Allocated memory is still 113.2MB. Free memory was 44.2MB in the beginning and 63.9MB in the end (delta: -19.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 16163.56ms. Allocated memory was 113.2MB in the beginning and 255.9MB in the end (delta: 142.6MB). Free memory was 63.2MB in the beginning and 151.7MB in the end (delta: -88.4MB). Peak memory consumption was 54.0MB. Max. memory is 16.1GB. * Witness Printer took 4.12ms. Allocated memory is still 255.9MB. Free memory is still 151.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 223]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 5885. Possible FailurePath: [L5919] CALL memset_override_0_harness() [L5906] short d1[160]; [L5907] short d2[160]; [L5908] int c = __VERIFIER_nondet_int(); [L5909] CALL assume_abort_if_not(c == 0) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5909] RET assume_abort_if_not(c == 0) VAL [c=0, d1={6:0}, d2={5:0}] [L5911] unsigned size = __VERIFIER_nondet_uint(); [L5912] CALL assume_abort_if_not((size & 0x7) == 0) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5912] RET assume_abort_if_not((size & 0x7) == 0) VAL [c=0, d1={6:0}, d2={5:0}, size=0] [L5913] CALL assume_abort_if_not(size < 160) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5913] RET assume_abort_if_not(size < 160) VAL [c=0, d1={6:0}, d2={5:0}, size=0] [L5914] CALL memset_impl(d1, c, size) [L5870] CALL assume_abort_if_not((((n) == 0) || (s))) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5870] RET assume_abort_if_not((((n) == 0) || (s))) VAL [c=0, n=0, s={6:0}] [L5871] COND FALSE !(n > 0) VAL [c=0, n=0, s={6:0}] [L5876] return s; [L5914] RET memset_impl(d1, c, size) [L5915] CALL memset_override_0_impl(d2, c, size) [L5881] CALL assume_abort_if_not((((n) == 0) || (dst))) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5881] RET assume_abort_if_not((((n) == 0) || (dst))) VAL [c=0, dst={5:0}, n=0] [L5883] CALL __VERIFIER_assert(c == 0) VAL [\old(cond)=1] [L223] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5883] RET __VERIFIER_assert(c == 0) VAL [c=0, dst={5:0}, n=0] [L5884] size_t num_uint64s = n >> 3; [L5885] size_t rem = n & 0x7; VAL [c=0, dst={5:0}, n=0, num_uint64s=0] [L5886] CALL __VERIFIER_assert(rem == 0) VAL [\old(cond)=0] [L223] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L223] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.1s, OverallIterations: 4, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 160 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 132 mSDsluCounter, 517 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 395 mSDsCounter, 66 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 708 IncrementalHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 66 mSolverCounterUnsat, 157 mSDtfsCounter, 708 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 103 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=2, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 35 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 692 SizeOfPredicates, 26 NumberOfNonLiveVariables, 280 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 119/143 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 7.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 41, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 22, TOOLS_POST_TIME: 3.2s, TOOLS_POST_CALL_APPLICATIONS: 32, TOOLS_POST_CALL_TIME: 1.6s, TOOLS_POST_RETURN_APPLICATIONS: 20, TOOLS_POST_RETURN_TIME: 2.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 74, TOOLS_QUANTIFIERELIM_TIME: 6.9s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.8s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 102, FLUID_YES_ANSWERS: 8, DOMAIN_JOIN_APPLICATIONS: 32, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 8, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 41, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 1.5s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.5s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 20, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 462, DAG_COMPRESSION_RETAINED_NODES: 115, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-20 23:57:41,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/memset_override_0_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P --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 5db0d3c47797ff0a215821e8d5fa38ab9190be93d125d3ffd24136b371560f6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:57:43,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:57:43,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:57:43,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:57:43,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:57:43,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:57:43,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:57:43,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:57:43,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:57:43,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:57:43,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:57:43,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:57:43,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:57:43,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:57:43,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:57:43,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:57:43,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:57:43,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:57:43,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:57:43,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:57:43,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:57:43,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:57:43,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:57:43,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:57:43,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:57:43,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:57:43,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:57:43,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:57:43,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:57:43,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:57:43,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:57:43,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:57:43,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:57:43,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:57:43,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:57:43,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:57:43,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:57:43,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:57:43,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:57:43,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:57:43,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:57:43,743 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-20 23:57:43,794 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:57:43,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:57:43,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:57:43,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:57:43,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:57:43,796 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:57:43,797 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:57:43,797 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:57:43,797 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:57:43,797 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:57:43,798 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:57:43,799 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:57:43,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:57:43,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:57:43,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:57:43,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:57:43,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:57:43,801 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:57:43,802 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:57:43,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:57:43,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:57:43,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:57:43,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:57:43,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:57:43,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:57:43,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:57:43,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:57:43,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:57:43,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:57:43,804 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:57:43,805 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:57:43,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:57:43,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:57:43,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:57:43,806 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5db0d3c47797ff0a215821e8d5fa38ab9190be93d125d3ffd24136b371560f6c [2021-11-20 23:57:44,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:57:44,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:57:44,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:57:44,236 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:57:44,237 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:57:44,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/memset_override_0_harness.i [2021-11-20 23:57:44,314 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/data/940e5a820/e5c2f324ad274655b29a22afd27c6494/FLAG855e0b40b [2021-11-20 23:57:45,085 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:57:45,086 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i [2021-11-20 23:57:45,127 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/data/940e5a820/e5c2f324ad274655b29a22afd27c6494/FLAG855e0b40b [2021-11-20 23:57:45,183 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/data/940e5a820/e5c2f324ad274655b29a22afd27c6494 [2021-11-20 23:57:45,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:57:45,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:57:45,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:57:45,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:57:45,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:57:45,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:45,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f087b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:45, skipping insertion in model container [2021-11-20 23:57:45,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:57:45" (1/1) ... [2021-11-20 23:57:45,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:57:45,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:57:45,650 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4491,4504] [2021-11-20 23:57:45,656 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4551,4564] [2021-11-20 23:57:46,319 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,320 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,322 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,323 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,338 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,339 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,341 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,342 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,344 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,345 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,346 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,347 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,547 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:57:46,549 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:57:46,550 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:57:46,551 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:57:46,553 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:57:46,554 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:57:46,555 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:57:46,555 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:57:46,556 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:57:46,557 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:57:46,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:57:46,683 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:57:46,711 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4491,4504] [2021-11-20 23:57:46,714 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_a6f88f52-4005-40df-be31-20eeb1dbacf8/sv-benchmarks/c/aws-c-common/memset_override_0_harness.i[4551,4564] [2021-11-20 23:57:46,797 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,798 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,802 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,805 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,825 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,836 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,838 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,838 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,839 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,844 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,844 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,845 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:57:46,879 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:57:46,880 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:57:46,881 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:57:46,882 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:57:46,883 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:57:46,884 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:57:46,884 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:57:46,885 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:57:46,885 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:57:46,886 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:57:46,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:57:47,101 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:57:47,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47 WrapperNode [2021-11-20 23:57:47,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:57:47,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:57:47,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:57:47,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:57:47,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (1/1) ... [2021-11-20 23:57:47,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (1/1) ... [2021-11-20 23:57:47,233 INFO L137 Inliner]: procedures = 611, calls = 609, calls flagged for inlining = 38, calls inlined = 6, statements flattened = 85 [2021-11-20 23:57:47,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:57:47,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:57:47,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:57:47,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:57:47,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (1/1) ... [2021-11-20 23:57:47,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (1/1) ... [2021-11-20 23:57:47,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (1/1) ... [2021-11-20 23:57:47,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (1/1) ... [2021-11-20 23:57:47,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (1/1) ... [2021-11-20 23:57:47,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (1/1) ... [2021-11-20 23:57:47,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (1/1) ... [2021-11-20 23:57:47,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:57:47,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:57:47,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:57:47,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:57:47,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (1/1) ... [2021-11-20 23:57:47,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:57:47,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:47,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:57:47,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:57:47,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:57:47,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:57:47,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:57:47,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:57:47,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:57:47,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:57:47,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:57:47,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-20 23:57:47,418 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:57:47,418 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:57:47,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:57:47,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-20 23:57:47,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-20 23:57:47,419 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2021-11-20 23:57:47,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2021-11-20 23:57:47,419 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 23:57:47,419 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 23:57:47,692 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:57:47,694 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:57:47,977 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:57:47,986 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:57:47,988 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:57:47,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:57:47 BoogieIcfgContainer [2021-11-20 23:57:47,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:57:47,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:57:47,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:57:47,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:57:47,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:57:45" (1/3) ... [2021-11-20 23:57:47,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7460cc07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:57:47, skipping insertion in model container [2021-11-20 23:57:47,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:57:47" (2/3) ... [2021-11-20 23:57:47,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7460cc07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:57:47, skipping insertion in model container [2021-11-20 23:57:47,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:57:47" (3/3) ... [2021-11-20 23:57:48,001 INFO L111 eAbstractionObserver]: Analyzing ICFG memset_override_0_harness.i [2021-11-20 23:57:48,006 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:57:48,007 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:57:48,085 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:57:48,094 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 [2021-11-20 23:57:48,094 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:57:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 40 states have internal predecessors, (49), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 23:57:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:57:48,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:48,120 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:48,120 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash 16590849, now seen corresponding path program 1 times [2021-11-20 23:57:48,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:57:48,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441700790] [2021-11-20 23:57:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:48,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:57:48,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:57:48,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:57:48,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:57:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:48,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 23:57:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 23:57:48,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 23:57:48,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:57:48,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441700790] [2021-11-20 23:57:48,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441700790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:48,513 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:48,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:57:48,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881430281] [2021-11-20 23:57:48,516 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:48,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:57:48,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:57:48,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:57:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:57:48,566 INFO L87 Difference]: Start difference. First operand has 60 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 40 states have internal predecessors, (49), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 23:57:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:48,613 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2021-11-20 23:57:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:57:48,617 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2021-11-20 23:57:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:48,626 INFO L225 Difference]: With dead ends: 117 [2021-11-20 23:57:48,626 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 23:57:48,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:57:48,634 INFO L933 BasicCegarLoop]: 75 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, 75 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 [2021-11-20 23:57:48,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:57:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 23:57:48,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-20 23:57:48,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 15 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:57:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-11-20 23:57:48,676 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 36 [2021-11-20 23:57:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:48,677 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-11-20 23:57:48,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 23:57:48,677 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-11-20 23:57:48,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:57:48,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:48,680 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:48,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:48,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:57:48,893 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:48,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:48,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1271235587, now seen corresponding path program 1 times [2021-11-20 23:57:48,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:57:48,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424485032] [2021-11-20 23:57:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:48,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:57:48,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:57:48,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:57:48,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:57:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:49,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:57:49,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:49,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:49,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:57:49,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424485032] [2021-11-20 23:57:49,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424485032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:49,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [906279971] [2021-11-20 23:57:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:49,381 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:57:49,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:57:49,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:57:49,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-20 23:57:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:49,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:57:49,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:49,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:49,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [906279971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:49,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149634260] [2021-11-20 23:57:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:49,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:49,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:49,854 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:49,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:57:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:49,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:57:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 23:57:50,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:50,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149634260] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:50,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:57:50,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 9] total 12 [2021-11-20 23:57:50,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522286694] [2021-11-20 23:57:50,247 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:57:50,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:57:50,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:57:50,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:57:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:57:50,255 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 23:57:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:50,464 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-11-20 23:57:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:57:50,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 36 [2021-11-20 23:57:50,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:50,467 INFO L225 Difference]: With dead ends: 58 [2021-11-20 23:57:50,467 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 23:57:50,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:57:50,469 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:50,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 429 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:57:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 23:57:50,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-20 23:57:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 37 states have internal predecessors, (41), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:57:50,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-11-20 23:57:50,483 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 36 [2021-11-20 23:57:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:50,484 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-11-20 23:57:50,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 23:57:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-11-20 23:57:50,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 23:57:50,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:50,487 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 23:57:50,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:50,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:50,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-20 23:57:51,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:57:51,113 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2010040638, now seen corresponding path program 1 times [2021-11-20 23:57:51,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:57:51,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685056566] [2021-11-20 23:57:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:51,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:57:51,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:57:51,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:57:51,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:57:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:51,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:57:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:51,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:51,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:57:51,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685056566] [2021-11-20 23:57:51,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685056566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:51,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [738973687] [2021-11-20 23:57:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:51,860 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:57:51,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:57:51,869 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:57:51,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-20 23:57:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:52,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:57:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 23:57:52,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 23:57:52,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [738973687] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:52,650 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:57:52,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [9, 9] total 18 [2021-11-20 23:57:52,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030589773] [2021-11-20 23:57:52,651 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:52,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 23:57:52,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:57:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 23:57:52,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:57:52,653 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 23:57:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:52,969 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2021-11-20 23:57:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:57:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 42 [2021-11-20 23:57:52,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:52,972 INFO L225 Difference]: With dead ends: 83 [2021-11-20 23:57:52,972 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 23:57:52,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:57:52,974 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 42 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:52,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 742 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2021-11-20 23:57:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 23:57:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2021-11-20 23:57:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:57:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2021-11-20 23:57:52,988 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 42 [2021-11-20 23:57:52,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:52,988 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2021-11-20 23:57:52,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 23:57:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2021-11-20 23:57:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 23:57:52,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:52,990 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 23:57:53,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:53,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:53,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:57:53,394 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:53,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1722148702, now seen corresponding path program 1 times [2021-11-20 23:57:53,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:57:53,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150673833] [2021-11-20 23:57:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:53,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:57:53,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:57:53,396 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:57:53,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 23:57:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:53,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:57:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:53,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:54,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:57:54,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150673833] [2021-11-20 23:57:54,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150673833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:54,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2079912655] [2021-11-20 23:57:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:54,152 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:57:54,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:57:54,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:57:54,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-20 23:57:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:54,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:57:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 23:57:54,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 23:57:54,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2079912655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:54,522 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:57:54,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9] total 16 [2021-11-20 23:57:54,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370053869] [2021-11-20 23:57:54,522 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:54,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:57:54,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:57:54,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:57:54,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:57:54,524 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:57:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:54,568 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2021-11-20 23:57:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:57:54,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 43 [2021-11-20 23:57:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:54,572 INFO L225 Difference]: With dead ends: 113 [2021-11-20 23:57:54,572 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 23:57:54,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:57:54,574 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:54,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 124 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:57:54,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 23:57:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-20 23:57:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:57:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-11-20 23:57:54,586 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 43 [2021-11-20 23:57:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:54,587 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-11-20 23:57:54,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:57:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-11-20 23:57:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 23:57:54,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:54,589 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 23:57:54,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:54,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-20 23:57:55,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:57:55,004 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:55,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:55,005 INFO L85 PathProgramCache]: Analyzing trace with hash 982661572, now seen corresponding path program 1 times [2021-11-20 23:57:55,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:57:55,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565045129] [2021-11-20 23:57:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:55,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:57:55,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:57:55,007 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:57:55,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 23:57:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:55,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:57:55,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 23:57:55,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 23:57:55,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:57:55,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565045129] [2021-11-20 23:57:55,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565045129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:55,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876868417] [2021-11-20 23:57:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:55,724 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:57:55,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:57:55,726 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:57:55,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-20 23:57:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:55,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:57:55,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:57:56,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:56,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [876868417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:56,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846095702] [2021-11-20 23:57:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:56,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:57:56,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:57:56,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:57:56,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 23:57:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:57:56,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:57:57,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:57:57,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846095702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:57:57,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:57:57,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 10, 9, 9] total 23 [2021-11-20 23:57:57,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161487042] [2021-11-20 23:57:57,594 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:57:57,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 23:57:57,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:57:57,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 23:57:57,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:57:57,596 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 10 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-20 23:57:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:58,269 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2021-11-20 23:57:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 23:57:58,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 10 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 45 [2021-11-20 23:57:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:58,270 INFO L225 Difference]: With dead ends: 120 [2021-11-20 23:57:58,270 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 23:57:58,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-11-20 23:57:58,273 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 16 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:58,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 821 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2021-11-20 23:57:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 23:57:58,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2021-11-20 23:57:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 45 states have internal predecessors, (49), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:57:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-11-20 23:57:58,285 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 45 [2021-11-20 23:57:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:58,286 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-11-20 23:57:58,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 10 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-20 23:57:58,286 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-11-20 23:57:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 23:57:58,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:58,288 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:58,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:58,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:58,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:58,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:57:58,891 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1110629482, now seen corresponding path program 1 times [2021-11-20 23:57:58,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:57:58,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273247716] [2021-11-20 23:57:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:58,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:57:58,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:57:58,894 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:57:58,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 23:57:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:59,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:57:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:57:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 23:57:59,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:57:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-20 23:57:59,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:57:59,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273247716] [2021-11-20 23:57:59,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273247716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:57:59,474 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:57:59,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-20 23:57:59,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597821929] [2021-11-20 23:57:59,474 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:57:59,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:57:59,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:57:59,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:57:59,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:57:59,476 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 23:57:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:57:59,595 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-11-20 23:57:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:57:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 51 [2021-11-20 23:57:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:57:59,597 INFO L225 Difference]: With dead ends: 71 [2021-11-20 23:57:59,597 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 23:57:59,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:57:59,598 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:57:59,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 309 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:57:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 23:57:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-20 23:57:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 48 states have internal predecessors, (52), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:57:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-11-20 23:57:59,609 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 51 [2021-11-20 23:57:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:57:59,610 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-11-20 23:57:59,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 23:57:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-11-20 23:57:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 23:57:59,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:57:59,612 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:57:59,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:57:59,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:57:59,829 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:57:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:57:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1132287315, now seen corresponding path program 1 times [2021-11-20 23:57:59,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:57:59,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813500672] [2021-11-20 23:57:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:57:59,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:57:59,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:57:59,831 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:57:59,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 23:57:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:57:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:57:59,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 23:58:00,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 23:58:00,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:58:00,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813500672] [2021-11-20 23:58:00,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813500672] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:00,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:58:00,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2021-11-20 23:58:00,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745996881] [2021-11-20 23:58:00,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:58:00,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:58:00,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:58:00,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:58:00,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:58:00,442 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 23:58:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:00,552 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-11-20 23:58:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:58:00,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-11-20 23:58:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:00,554 INFO L225 Difference]: With dead ends: 112 [2021-11-20 23:58:00,554 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 23:58:00,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:58:00,556 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 31 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:00,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 191 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:58:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 23:58:00,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2021-11-20 23:58:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 57 states have internal predecessors, (62), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 23:58:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-11-20 23:58:00,574 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 68 [2021-11-20 23:58:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:00,575 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-11-20 23:58:00,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 23:58:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-11-20 23:58:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 23:58:00,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:00,577 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:58:00,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:00,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:58:00,792 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:58:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1383518092, now seen corresponding path program 1 times [2021-11-20 23:58:00,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:58:00,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461021008] [2021-11-20 23:58:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:00,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:58:00,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:58:00,794 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:58:00,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 23:58:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:00,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:58:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 23:58:01,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 23:58:01,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:58:01,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461021008] [2021-11-20 23:58:01,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461021008] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:01,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:58:01,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 13 [2021-11-20 23:58:01,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067651861] [2021-11-20 23:58:01,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:58:01,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:58:01,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:58:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:58:01,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:58:01,525 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 4 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 23:58:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:01,650 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2021-11-20 23:58:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:58:01,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 4 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 72 [2021-11-20 23:58:01,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:01,652 INFO L225 Difference]: With dead ends: 104 [2021-11-20 23:58:01,652 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 23:58:01,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:58:01,653 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 25 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:01,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 315 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:58:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 23:58:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-20 23:58:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:58:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2021-11-20 23:58:01,662 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 72 [2021-11-20 23:58:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:01,663 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2021-11-20 23:58:01,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 4 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 23:58:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2021-11-20 23:58:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 23:58:01,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:01,665 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:58:01,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:01,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:58:01,880 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:58:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:01,881 INFO L85 PathProgramCache]: Analyzing trace with hash 511671837, now seen corresponding path program 1 times [2021-11-20 23:58:01,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:58:01,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30713633] [2021-11-20 23:58:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:01,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:58:01,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:58:01,883 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:58:01,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 23:58:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:02,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 23:58:02,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 23:58:02,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 23:58:03,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:58:03,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30713633] [2021-11-20 23:58:03,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30713633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:03,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [172204152] [2021-11-20 23:58:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:03,337 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:58:03,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:58:03,338 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:58:03,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-20 23:58:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:03,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 23:58:03,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 23:58:04,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 23:58:05,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [172204152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:05,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480562457] [2021-11-20 23:58:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:05,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:05,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:58:05,216 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:58:05,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 23:58:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:05,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 23:58:05,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 23:58:06,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 23:58:06,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480562457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:06,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:58:06,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 13, 10, 10] total 41 [2021-11-20 23:58:06,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009760600] [2021-11-20 23:58:06,600 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:58:06,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 23:58:06,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:58:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 23:58:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 23:58:06,604 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 35 states have internal predecessors, (90), 16 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-20 23:58:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:08,358 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2021-11-20 23:58:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 23:58:08,359 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 35 states have internal predecessors, (90), 16 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) Word has length 75 [2021-11-20 23:58:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:08,360 INFO L225 Difference]: With dead ends: 131 [2021-11-20 23:58:08,360 INFO L226 Difference]: Without dead ends: 78 [2021-11-20 23:58:08,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 408 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=442, Invalid=2528, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 23:58:08,362 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:08,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 995 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2021-11-20 23:58:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-20 23:58:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-20 23:58:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:58:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-11-20 23:58:08,372 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 75 [2021-11-20 23:58:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:08,372 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-11-20 23:58:08,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 35 states have internal predecessors, (90), 16 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-20 23:58:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-11-20 23:58:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 23:58:08,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:08,375 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:58:08,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-20 23:58:08,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-20 23:58:08,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:08,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:08,979 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:58:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:08,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2075883641, now seen corresponding path program 1 times [2021-11-20 23:58:08,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:58:08,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264919906] [2021-11-20 23:58:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:08,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:58:08,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:58:08,981 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:58:08,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 23:58:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:58:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 38 proven. 55 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 23:58:10,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 9 proven. 61 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 23:58:11,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:58:11,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264919906] [2021-11-20 23:58:11,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264919906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:11,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2119105081] [2021-11-20 23:58:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:11,293 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:58:11,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:58:11,298 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:58:11,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-20 23:58:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:11,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:58:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 49 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 23:58:12,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 23:58:14,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2119105081] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:14,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622045093] [2021-11-20 23:58:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:14,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:14,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:58:14,953 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:58:14,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 23:58:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 23:58:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:58:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 38 proven. 55 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 23:58:16,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:58:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 23:58:21,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622045093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:58:21,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:58:21,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14, 14, 16, 18] total 75 [2021-11-20 23:58:21,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392652521] [2021-11-20 23:58:21,054 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:58:21,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-20 23:58:21,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:58:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-20 23:58:21,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=4839, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 23:58:21,058 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 72 states have internal predecessors, (156), 16 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-20 23:58:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:58:41,320 INFO L93 Difference]: Finished difference Result 196 states and 239 transitions. [2021-11-20 23:58:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 23:58:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 72 states have internal predecessors, (156), 16 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) Word has length 85 [2021-11-20 23:58:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:58:41,324 INFO L225 Difference]: With dead ends: 196 [2021-11-20 23:58:41,324 INFO L226 Difference]: Without dead ends: 142 [2021-11-20 23:58:41,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 436 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3200 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=1488, Invalid=9224, Unknown=0, NotChecked=0, Total=10712 [2021-11-20 23:58:41,328 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 245 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:58:41,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 2385 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1323 Invalid, 0 Unknown, 80 Unchecked, 4.1s Time] [2021-11-20 23:58:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-20 23:58:41,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 105. [2021-11-20 23:58:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.15) internal successors, (92), 81 states have internal predecessors, (92), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:58:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2021-11-20 23:58:41,347 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 85 [2021-11-20 23:58:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:58:41,347 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2021-11-20 23:58:41,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 72 states have internal predecessors, (156), 16 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-20 23:58:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2021-11-20 23:58:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 23:58:41,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:58:41,350 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:58:41,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-20 23:58:41,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-20 23:58:41,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:41,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:41,966 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:58:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:58:41,966 INFO L85 PathProgramCache]: Analyzing trace with hash 24387113, now seen corresponding path program 2 times [2021-11-20 23:58:41,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:58:41,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478949636] [2021-11-20 23:58:41,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:58:41,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:58:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:58:41,968 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:58:41,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 23:58:42,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:58:42,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-20 23:58:42,349 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:58:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:58:42,705 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-20 23:58:42,705 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:58:42,706 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:58:42,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 23:58:42,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:58:42,932 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:58:42,935 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:58:43,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:58:43 BoogieIcfgContainer [2021-11-20 23:58:43,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:58:43,011 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:58:43,011 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:58:43,011 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:58:43,011 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:57:47" (3/4) ... [2021-11-20 23:58:43,013 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 23:58:43,092 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-20 23:58:43,092 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:58:43,093 INFO L158 Benchmark]: Toolchain (without parser) took 57905.25ms. Allocated memory was 60.8MB in the beginning and 123.7MB in the end (delta: 62.9MB). Free memory was 34.1MB in the beginning and 84.4MB in the end (delta: -50.3MB). Peak memory consumption was 75.5MB. Max. memory is 16.1GB. [2021-11-20 23:58:43,093 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 60.8MB. Free memory was 41.7MB in the beginning and 41.7MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:58:43,094 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1910.64ms. Allocated memory was 60.8MB in the beginning and 102.8MB in the end (delta: 41.9MB). Free memory was 33.9MB in the beginning and 73.7MB in the end (delta: -39.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2021-11-20 23:58:43,094 INFO L158 Benchmark]: Boogie Procedure Inliner took 131.32ms. Allocated memory is still 102.8MB. Free memory was 73.7MB in the beginning and 69.0MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 23:58:43,094 INFO L158 Benchmark]: Boogie Preprocessor took 67.23ms. Allocated memory is still 102.8MB. Free memory was 69.0MB in the beginning and 65.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:58:43,095 INFO L158 Benchmark]: RCFGBuilder took 688.15ms. Allocated memory is still 102.8MB. Free memory was 65.9MB in the beginning and 48.5MB in the end (delta: 17.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-20 23:58:43,095 INFO L158 Benchmark]: TraceAbstraction took 55018.19ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 48.0MB in the beginning and 25.7MB in the end (delta: 22.3MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. [2021-11-20 23:58:43,096 INFO L158 Benchmark]: Witness Printer took 81.73ms. Allocated memory is still 123.7MB. Free memory was 25.7MB in the beginning and 84.4MB in the end (delta: -58.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 23:58:43,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 60.8MB. Free memory was 41.7MB in the beginning and 41.7MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1910.64ms. Allocated memory was 60.8MB in the beginning and 102.8MB in the end (delta: 41.9MB). Free memory was 33.9MB in the beginning and 73.7MB in the end (delta: -39.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 131.32ms. Allocated memory is still 102.8MB. Free memory was 73.7MB in the beginning and 69.0MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.23ms. Allocated memory is still 102.8MB. Free memory was 69.0MB in the beginning and 65.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 688.15ms. Allocated memory is still 102.8MB. Free memory was 65.9MB in the beginning and 48.5MB in the end (delta: 17.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 55018.19ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 48.0MB in the beginning and 25.7MB in the end (delta: 22.3MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. * Witness Printer took 81.73ms. Allocated memory is still 123.7MB. Free memory was 25.7MB in the beginning and 84.4MB in the end (delta: -58.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 223]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L5919] CALL memset_override_0_harness() [L5906] short d1[160]; [L5907] short d2[160]; [L5908] int c = __VERIFIER_nondet_int(); [L5909] CALL assume_abort_if_not(c == 0) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5909] RET assume_abort_if_not(c == 0) VAL [c=0, d1={16777223:0}, d2={5:0}] [L5911] unsigned size = __VERIFIER_nondet_uint(); [L5912] CALL assume_abort_if_not((size & 0x7) == 0) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5912] RET assume_abort_if_not((size & 0x7) == 0) VAL [c=0, d1={16777223:0}, d2={5:0}, size=8] [L5913] CALL assume_abort_if_not(size < 160) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5913] RET assume_abort_if_not(size < 160) VAL [c=0, d1={16777223:0}, d2={5:0}, size=8] [L5914] CALL memset_impl(d1, c, size) [L5870] CALL assume_abort_if_not((((n) == 0) || (s))) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5870] RET assume_abort_if_not((((n) == 0) || (s))) VAL [c=0, n=8, s={16777223:0}] [L5871] COND TRUE n > 0 [L5872] char *sp = (char *)s; [L5873] unsigned long i = 0; VAL [c=0, i=0, n=8, s={16777223:0}, sp={16777223:0}] [L5873] COND TRUE i < n [L5874] sp[i] = c VAL [c=0, i=0, n=8, s={16777223:0}, sp={16777223:0}] [L5873] i++ VAL [c=0, i=1, n=8, s={16777223:0}, sp={16777223:0}] [L5873] COND TRUE i < n [L5874] sp[i] = c VAL [c=0, i=1, n=8, s={16777223:0}, sp={16777223:0}] [L5873] i++ VAL [c=0, i=2, n=8, s={16777223:0}, sp={16777223:0}] [L5873] COND TRUE i < n [L5874] sp[i] = c VAL [c=0, i=2, n=8, s={16777223:0}, sp={16777223:0}] [L5873] i++ VAL [c=0, i=3, n=8, s={16777223:0}, sp={16777223:0}] [L5873] COND TRUE i < n [L5874] sp[i] = c VAL [c=0, i=3, n=8, s={16777223:0}, sp={16777223:0}] [L5873] i++ VAL [c=0, i=4, n=8, s={16777223:0}, sp={16777223:0}] [L5873] COND TRUE i < n [L5874] sp[i] = c VAL [c=0, i=4, n=8, s={16777223:0}, sp={16777223:0}] [L5873] i++ VAL [c=0, i=5, n=8, s={16777223:0}, sp={16777223:0}] [L5873] COND TRUE i < n [L5874] sp[i] = c VAL [c=0, i=5, n=8, s={16777223:0}, sp={16777223:0}] [L5873] i++ VAL [c=0, i=6, n=8, s={16777223:0}, sp={16777223:0}] [L5873] COND TRUE i < n [L5874] sp[i] = c VAL [c=0, i=6, n=8, s={16777223:0}, sp={16777223:0}] [L5873] i++ VAL [c=0, i=7, n=8, s={16777223:0}, sp={16777223:0}] [L5873] COND TRUE i < n [L5874] sp[i] = c VAL [c=0, i=7, n=8, s={16777223:0}, sp={16777223:0}] [L5873] i++ VAL [c=0, i=8, n=8, s={16777223:0}, sp={16777223:0}] [L5873] COND FALSE !(i < n) VAL [c=0, i=8, n=8, s={16777223:0}, sp={16777223:0}] [L5876] return s; VAL [c=0, i=8, n=8, s={16777223:0}, sp={16777223:0}] [L5914] RET memset_impl(d1, c, size) [L5915] CALL memset_override_0_impl(d2, c, size) [L5881] CALL assume_abort_if_not((((n) == 0) || (dst))) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5881] RET assume_abort_if_not((((n) == 0) || (dst))) VAL [c=0, dst={5:0}, n=8] [L5883] CALL __VERIFIER_assert(c == 0) VAL [\old(cond)=1] [L223] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5883] RET __VERIFIER_assert(c == 0) VAL [c=0, dst={5:0}, n=8] [L5884] size_t num_uint64s = n >> 3; [L5885] size_t rem = n & 0x7; VAL [c=0, dst={5:0}, n=8, num_uint64s=1, rem=0] [L5886] CALL __VERIFIER_assert(rem == 0) VAL [\old(cond)=1] [L223] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5886] RET __VERIFIER_assert(rem == 0) VAL [c=0, dst={5:0}, n=8, num_uint64s=1, rem=0] [L5888] uint64_t *d = (uint64_t *)dst; [L5890] size_t i = 0; VAL [c=0, d={5:0}, dst={5:0}, i=0, n=8, num_uint64s=1, rem=0] [L5890] COND TRUE i < num_uint64s [L5891] d[i] = 0 VAL [c=0, d={5:0}, dst={5:0}, i=0, n=8, num_uint64s=1, rem=0] [L5890] ++i VAL [c=0, d={5:0}, dst={5:0}, i=1, n=8, num_uint64s=1, rem=0] [L5890] COND FALSE !(i < num_uint64s) VAL [c=0, d={5:0}, dst={5:0}, i=1, n=8, num_uint64s=1, rem=0] [L5894] return dst; VAL [c=0, d={5:0}, dst={5:0}, i=1, n=8, num_uint64s=1, rem=0] [L5915] RET memset_override_0_impl(d2, c, size) [L5916] CALL assert_bytes_match(d1, d2, size) [L5654] CALL __VERIFIER_assert(!a == !b) VAL [\old(cond)=1] [L223] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5654] RET __VERIFIER_assert(!a == !b) VAL [\old(len)=8, a={16777223:0}, a={16777223:0}, b={5:0}, b={5:0}, len=8] [L5655-L5658] COND TRUE len > 0 && a != ((void *)0) && b != ((void *)0) VAL [\old(len)=8, a={16777223:0}, a={16777223:0}, b={5:0}, b={5:0}, len=8] [L5660] CALL, EXPR nondet_uint64_t() [L266] return __VERIFIER_nondet_ulong(); [L5660] RET, EXPR nondet_uint64_t() VAL [\old(len)=8, a={16777223:0}, a={16777223:0}, b={5:0}, b={5:0}, len=8, nondet_uint64_t()=6] [L5660] size_t i = nondet_uint64_t(); [L5661-L5663] CALL assume_abort_if_not(i < len && len < ( (18446744073709551615UL) >> (8 + 1))) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L5661-L5663] RET assume_abort_if_not(i < len && len < ( (18446744073709551615UL) >> (8 + 1))) VAL [\old(len)=8, a={16777223:0}, a={16777223:0}, b={5:0}, b={5:0}, i=6, len=8] [L5664] EXPR a[i] [L5664] EXPR b[i] VAL [\old(len)=8, a={16777223:0}, a={16777223:0}, a[i]=0, b={5:0}, b={5:0}, b[i]=-128, i=6, len=8] [L5664] CALL __VERIFIER_assert(a[i] == b[i]) VAL [\old(cond)=0] [L223] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L223] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 54.9s, OverallIterations: 11, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 23.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 484 SdHoareTripleChecker+Valid, 5.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 454 mSDsluCounter, 6386 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 177 IncrementalHoareTripleChecker+Unchecked, 5703 mSDsCounter, 208 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1974 IncrementalHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 208 mSolverCounterUnsat, 683 mSDtfsCounter, 1974 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2275 GetRequests, 2004 SyntacticMatches, 10 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 4350 ImplicationChecksByTransitivity, 32.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=10, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 65 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 22.7s InterpolantComputationTime, 1207 NumberOfCodeBlocks, 1207 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 2200 ConstructedInterpolants, 76 QuantifiedInterpolants, 6359 SizeOfPredicates, 122 NumberOfNonLiveVariables, 2553 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 40 InterpolantComputations, 10 PerfectInterpolantSequences, 2016/2612 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 23:58:43,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6f88f52-4005-40df-be31-20eeb1dbacf8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE