./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS --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 9ff439c9da308e48e314eaeb6f620d0560f5430b3c601570b5afd8d635a5b965 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:02:35,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:02:35,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:02:35,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:02:35,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:02:35,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:02:35,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:02:35,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:02:35,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:02:35,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:02:35,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:02:35,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:02:35,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:02:35,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:02:35,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:02:35,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:02:35,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:02:35,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:02:35,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:02:35,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:02:35,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:02:35,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:02:35,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:02:35,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:02:35,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:02:35,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:02:35,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:02:35,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:02:35,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:02:35,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:02:35,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:02:35,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:02:35,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:02:35,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:02:35,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:02:35,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:02:35,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:02:35,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:02:35,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:02:35,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:02:35,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:02:35,740 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:02:35,783 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:02:35,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:02:35,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:02:35,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:02:35,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:02:35,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:02:35,786 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:02:35,786 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:02:35,786 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:02:35,787 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:02:35,788 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:02:35,788 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:02:35,789 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:02:35,789 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:02:35,789 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:02:35,790 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:02:35,790 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:02:35,790 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:02:35,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:02:35,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:02:35,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:02:35,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:02:35,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:02:35,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:02:35,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:02:35,793 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:02:35,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:02:35,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:02:35,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:02:35,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:02:35,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:02:35,795 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:02:35,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:02:35,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:02:35,796 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:02:35,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:02:35,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:02:35,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:02:35,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ff439c9da308e48e314eaeb6f620d0560f5430b3c601570b5afd8d635a5b965 [2022-11-19 07:02:36,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:02:36,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:02:36,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:02:36,140 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:02:36,141 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:02:36,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i [2022-11-19 07:02:36,218 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/data/f0b723c2e/03621ec9f4cd4bef810d7d54c3c357db/FLAGcb9db857e [2022-11-19 07:02:37,010 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:02:37,011 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i [2022-11-19 07:02:37,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/data/f0b723c2e/03621ec9f4cd4bef810d7d54c3c357db/FLAGcb9db857e [2022-11-19 07:02:37,175 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/data/f0b723c2e/03621ec9f4cd4bef810d7d54c3c357db [2022-11-19 07:02:37,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:02:37,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:02:37,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:02:37,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:02:37,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:02:37,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:02:37" (1/1) ... [2022-11-19 07:02:37,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4be7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:37, skipping insertion in model container [2022-11-19 07:02:37,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:02:37" (1/1) ... [2022-11-19 07:02:37,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:02:37,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:02:37,563 WARN L234 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2022-11-19 07:02:37,569 WARN L234 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2022-11-19 07:02:38,408 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,414 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,416 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,417 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,420 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,444 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,446 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,448 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,448 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,451 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,452 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,453 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,453 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,647 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:02:38,650 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:02:38,653 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:02:38,654 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:02:38,655 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:02:38,656 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:02:38,659 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:02:38,661 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:02:38,662 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:02:38,663 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:02:38,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:02:38,793 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:02:38,819 WARN L234 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2022-11-19 07:02:38,820 WARN L234 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2022-11-19 07:02:38,895 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,895 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,896 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,896 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,897 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,934 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,934 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,936 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,936 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,938 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,939 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,939 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,940 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:38,973 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:02:38,981 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:02:38,982 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:02:38,983 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:02:38,984 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:02:38,985 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:02:38,985 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:02:38,986 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:02:38,987 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:02:38,988 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:02:39,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:02:39,182 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:02:39,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39 WrapperNode [2022-11-19 07:02:39,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:02:39,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:02:39,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:02:39,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:02:39,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,275 INFO L138 Inliner]: procedures = 592, calls = 624, calls flagged for inlining = 38, calls inlined = 6, statements flattened = 122 [2022-11-19 07:02:39,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:02:39,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:02:39,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:02:39,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:02:39,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,310 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:02:39,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:02:39,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:02:39,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:02:39,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (1/1) ... [2022-11-19 07:02:39,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:02:39,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:39,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:02:39,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:02:39,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:02:39,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:02:39,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:02:39,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:02:39,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:02:39,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:02:39,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:02:39,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:02:39,410 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:02:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:02:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2022-11-19 07:02:39,411 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2022-11-19 07:02:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-19 07:02:39,411 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-19 07:02:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:02:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:02:39,677 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:02:39,679 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:02:40,179 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:02:40,457 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:02:40,458 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:02:40,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:02:40 BoogieIcfgContainer [2022-11-19 07:02:40,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:02:40,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:02:40,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:02:40,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:02:40,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:02:37" (1/3) ... [2022-11-19 07:02:40,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c77acdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:02:40, skipping insertion in model container [2022-11-19 07:02:40,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:39" (2/3) ... [2022-11-19 07:02:40,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c77acdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:02:40, skipping insertion in model container [2022-11-19 07:02:40,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:02:40" (3/3) ... [2022-11-19 07:02:40,474 INFO L112 eAbstractionObserver]: Analyzing ICFG memset_using_uint64_harness.i [2022-11-19 07:02:40,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:02:40,494 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:02:40,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:02:40,568 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5033d50d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:02:40,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:02:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:02:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:02:40,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:40,580 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:40,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:02:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:40,585 INFO L85 PathProgramCache]: Analyzing trace with hash 727452986, now seen corresponding path program 1 times [2022-11-19 07:02:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:40,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200016985] [2022-11-19 07:02:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:02:42,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:42,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200016985] [2022-11-19 07:02:42,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200016985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:02:42,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:02:42,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:02:42,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799823266] [2022-11-19 07:02:42,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:02:42,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:02:42,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:02:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:02:42,143 INFO L87 Difference]: Start difference. First operand has 42 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:02:44,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:02:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:44,380 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-11-19 07:02:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:02:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2022-11-19 07:02:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:44,391 INFO L225 Difference]: With dead ends: 77 [2022-11-19 07:02:44,391 INFO L226 Difference]: Without dead ends: 41 [2022-11-19 07:02:44,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:02:44,399 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 23 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:44,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 151 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 07:02:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-19 07:02:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-19 07:02:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:02:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-11-19 07:02:44,457 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 19 [2022-11-19 07:02:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:44,458 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-11-19 07:02:44,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:02:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-11-19 07:02:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:02:44,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:44,461 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-19 07:02:44,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:02:44,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:02:44,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:44,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1509833810, now seen corresponding path program 1 times [2022-11-19 07:02:44,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:44,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206399458] [2022-11-19 07:02:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:44,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:02:45,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206399458] [2022-11-19 07:02:45,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206399458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:45,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298370156] [2022-11-19 07:02:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:45,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:45,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:45,657 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:45,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:02:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:45,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:02:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:02:46,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:02:46,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298370156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:02:46,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:02:46,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-11-19 07:02:46,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873494916] [2022-11-19 07:02:46,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:02:46,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:02:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:02:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:02:46,130 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 07:02:48,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:02:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:48,305 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-11-19 07:02:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:02:48,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 33 [2022-11-19 07:02:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:48,309 INFO L225 Difference]: With dead ends: 74 [2022-11-19 07:02:48,309 INFO L226 Difference]: Without dead ends: 49 [2022-11-19 07:02:48,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:02:48,311 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:48,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-19 07:02:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-19 07:02:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-11-19 07:02:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:02:48,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-11-19 07:02:48,325 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 33 [2022-11-19 07:02:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:48,325 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-11-19 07:02:48,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 07:02:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-11-19 07:02:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:02:48,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:48,327 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-19 07:02:48,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:48,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-19 07:02:48,534 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:02:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:48,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1817674979, now seen corresponding path program 1 times [2022-11-19 07:02:48,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:48,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116127278] [2022-11-19 07:02:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:48,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:02:48,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:48,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116127278] [2022-11-19 07:02:48,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116127278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:02:48,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:02:48,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:02:48,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888253889] [2022-11-19 07:02:48,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:02:48,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:02:48,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:48,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:02:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:02:48,826 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:02:50,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:02:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:50,896 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2022-11-19 07:02:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:02:50,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2022-11-19 07:02:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:50,898 INFO L225 Difference]: With dead ends: 83 [2022-11-19 07:02:50,898 INFO L226 Difference]: Without dead ends: 48 [2022-11-19 07:02:50,898 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:02:50,899 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:50,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-11-19 07:02:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-19 07:02:50,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-19 07:02:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:02:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-11-19 07:02:50,918 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 34 [2022-11-19 07:02:50,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:50,918 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-11-19 07:02:50,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:02:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-11-19 07:02:50,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:02:50,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:50,922 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-19 07:02:50,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:02:50,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:02:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1891232334, now seen corresponding path program 1 times [2022-11-19 07:02:50,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:50,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175576953] [2022-11-19 07:02:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:50,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:02:51,305 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:02:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:02:52,453 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:02:52,453 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:02:52,454 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:02:52,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:02:52,460 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-19 07:02:52,463 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:02:52,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:02:52 BoogieIcfgContainer [2022-11-19 07:02:52,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:02:52,502 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:02:52,503 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:02:52,503 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:02:52,503 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:02:40" (3/4) ... [2022-11-19 07:02:52,506 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 07:02:52,507 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:02:52,507 INFO L158 Benchmark]: Toolchain (without parser) took 15327.04ms. Allocated memory was 113.2MB in the beginning and 293.6MB in the end (delta: 180.4MB). Free memory was 88.3MB in the beginning and 243.2MB in the end (delta: -154.9MB). Peak memory consumption was 25.8MB. Max. memory is 16.1GB. [2022-11-19 07:02:52,508 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 113.2MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:02:52,508 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1999.90ms. Allocated memory was 113.2MB in the beginning and 140.5MB in the end (delta: 27.3MB). Free memory was 87.9MB in the beginning and 55.6MB in the end (delta: 32.3MB). Peak memory consumption was 64.6MB. Max. memory is 16.1GB. [2022-11-19 07:02:52,509 INFO L158 Benchmark]: Boogie Procedure Inliner took 92.18ms. Allocated memory is still 140.5MB. Free memory was 55.6MB in the beginning and 102.1MB in the end (delta: -46.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 07:02:52,509 INFO L158 Benchmark]: Boogie Preprocessor took 40.16ms. Allocated memory is still 140.5MB. Free memory was 102.1MB in the beginning and 99.1MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:02:52,509 INFO L158 Benchmark]: RCFGBuilder took 1143.99ms. Allocated memory is still 140.5MB. Free memory was 99.1MB in the beginning and 80.5MB in the end (delta: 18.6MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. [2022-11-19 07:02:52,510 INFO L158 Benchmark]: TraceAbstraction took 12037.38ms. Allocated memory was 140.5MB in the beginning and 293.6MB in the end (delta: 153.1MB). Free memory was 80.5MB in the beginning and 243.2MB in the end (delta: -162.7MB). Peak memory consumption was 125.4MB. Max. memory is 16.1GB. [2022-11-19 07:02:52,510 INFO L158 Benchmark]: Witness Printer took 4.32ms. Allocated memory is still 293.6MB. Free memory is still 243.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:02:52,512 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 113.2MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1999.90ms. Allocated memory was 113.2MB in the beginning and 140.5MB in the end (delta: 27.3MB). Free memory was 87.9MB in the beginning and 55.6MB in the end (delta: 32.3MB). Peak memory consumption was 64.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 92.18ms. Allocated memory is still 140.5MB. Free memory was 55.6MB in the beginning and 102.1MB in the end (delta: -46.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.16ms. Allocated memory is still 140.5MB. Free memory was 102.1MB in the beginning and 99.1MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1143.99ms. Allocated memory is still 140.5MB. Free memory was 99.1MB in the beginning and 80.5MB in the end (delta: 18.6MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. * TraceAbstraction took 12037.38ms. Allocated memory was 140.5MB in the beginning and 293.6MB in the end (delta: 153.1MB). Free memory was 80.5MB in the beginning and 243.2MB in the end (delta: -162.7MB). Peak memory consumption was 125.4MB. Max. memory is 16.1GB. * Witness Printer took 4.32ms. Allocated memory is still 293.6MB. Free memory is still 243.2MB. 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 5884. Possible FailurePath: [L5947] CALL memset_using_uint64_harness() [L5937] short d1[160]; [L5938] short d2[160]; [L5939] int c = __VERIFIER_nondet_int(); [L5940] unsigned size = __VERIFIER_nondet_uint(); [L5941] CALL assume_abort_if_not(size < 160) VAL [\old(cond)=1] [L211] COND FALSE !(!cond) [L5941] RET assume_abort_if_not(size < 160) VAL [c=-249, d1={10:0}, d2={11:0}, size=1] [L5942] 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=-249, n=1, s={10:0}] [L5871] COND TRUE n > 0 [L5872] char *sp = (char *)s; [L5873] unsigned long i = 0; VAL [c=-249, i=0, n=1, s={10:0}, sp={10:0}] [L5873] COND TRUE i < n [L5874] sp[i] = c [L5873] i++ VAL [c=-249, i=1, n=1, s={10:0}, sp={10:0}] [L5873] COND FALSE !(i < n) VAL [c=-249, i=1, n=1, s={10:0}, sp={10:0}] [L5876] return s; [L5942] RET memset_impl(d1, c, size) [L5943] CALL memset_using_uint64_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=-249, dst={11:0}, n=1] [L5883] size_t num_uint64s = n >> 3; [L5884] size_t rem = n & 0x7; [L5886] uint8_t *d = (uint8_t *)dst; [L5890] case 7: [L5892] case 6: [L5894] case 5: [L5896] case 4: [L5898] case 3: [L5900] case 2: [L5902] case 1: [L5906] d += rem [L5908] uint64_t compounded = 0; [L5909] COND FALSE !(num_uint64s > 0 && c != 0) [L5921] size_t i = 0; VAL [c=-249, chars={11:-8}, compounded={9:0}, d={11:9223372036854775807}, dst={11:0}, i=0, n=1, num_uint64s=0, rem=9223372036854775807] [L5921] COND FALSE !(i < num_uint64s) [L5925] return dst; [L5908] uint64_t compounded = 0; [L5925] return dst; [L5943] RET memset_using_uint64_impl(d2, c, size) [L5944] 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)=1, a={10:0}, a={10:0}, b={11:0}, b={11:0}, len=1] [L5655-L5658] COND TRUE len > 0 && a != ((void *)0) && b != ((void *)0) VAL [\old(len)=1, a={10:0}, a={10:0}, b={11:0}, b={11:0}, len=1] [L5660] CALL, EXPR nondet_uint64_t() [L266] return __VERIFIER_nondet_ulong(); [L5660] RET, EXPR nondet_uint64_t() VAL [\old(len)=1, a={10:0}, a={10:0}, b={11:0}, b={11:0}, len=1, nondet_uint64_t()=0] [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) [L5661-L5663] RET assume_abort_if_not(i < len && len < ( (18446744073709551615UL) >> (8 + 1))) VAL [\old(len)=1, a={10:0}, a={10:0}, b={11:0}, b={11:0}, i=0, len=1] [L5664] EXPR a[i] [L5664] EXPR b[i] VAL [\old(len)=1, a={10:0}, a={10:0}, a[i]=7, b={11:0}, b={11:0}, b[i]=-248, i=0, len=1] [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, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.9s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 357 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 243 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 144 IncrementalHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 114 mSDtfsCounter, 144 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=3, InterpolantAutomatonStates: 16, 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 338 SizeOfPredicates, 7 NumberOfNonLiveVariables, 394 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 45/48 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 could not prove your program: unable to determine feasibility of some traces [2022-11-19 07:02:52,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/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/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS --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 9ff439c9da308e48e314eaeb6f620d0560f5430b3c601570b5afd8d635a5b965 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:02:54,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:02:54,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:02:54,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:02:54,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:02:54,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:02:54,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:02:54,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:02:54,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:02:54,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:02:54,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:02:54,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:02:54,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:02:54,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:02:54,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:02:54,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:02:54,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:02:54,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:02:54,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:02:54,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:02:54,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:02:54,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:02:54,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:02:54,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:02:54,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:02:54,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:02:54,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:02:54,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:02:54,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:02:54,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:02:54,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:02:54,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:02:54,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:02:54,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:02:54,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:02:54,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:02:54,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:02:54,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:02:54,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:02:54,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:02:54,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:02:54,906 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-19 07:02:54,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:02:54,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:02:54,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:02:54,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:02:54,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:02:54,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:02:54,945 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:02:54,945 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:02:54,945 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:02:54,945 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:02:54,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:02:54,947 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:02:54,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:02:54,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:02:54,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:02:54,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:02:54,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:02:54,966 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:02:54,966 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:02:54,966 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:02:54,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:02:54,967 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:02:54,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:02:54,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:02:54,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:02:54,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:02:54,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:02:54,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:02:54,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:02:54,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:02:54,970 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:02:54,970 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:02:54,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:02:54,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:02:54,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:02:54,971 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ff439c9da308e48e314eaeb6f620d0560f5430b3c601570b5afd8d635a5b965 [2022-11-19 07:02:55,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:02:55,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:02:55,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:02:55,400 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:02:55,401 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:02:55,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i [2022-11-19 07:02:55,477 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/data/39a90d130/213273f3b62f45eb91f11911a4503658/FLAGa12f1dca1 [2022-11-19 07:02:56,271 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:02:56,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i [2022-11-19 07:02:56,312 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/data/39a90d130/213273f3b62f45eb91f11911a4503658/FLAGa12f1dca1 [2022-11-19 07:02:56,821 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/data/39a90d130/213273f3b62f45eb91f11911a4503658 [2022-11-19 07:02:56,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:02:56,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:02:56,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:02:56,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:02:56,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:02:56,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:02:56" (1/1) ... [2022-11-19 07:02:56,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9635943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:56, skipping insertion in model container [2022-11-19 07:02:56,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:02:56" (1/1) ... [2022-11-19 07:02:56,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:02:56,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:02:57,219 WARN L234 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2022-11-19 07:02:57,227 WARN L234 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2022-11-19 07:02:57,928 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,929 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,929 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,930 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,932 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,949 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,950 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,956 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,957 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,962 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,967 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,970 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:57,970 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,244 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:02:58,247 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:02:58,249 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:02:58,251 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:02:58,254 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:02:58,256 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:02:58,260 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:02:58,262 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:02:58,265 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:02:58,270 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:02:58,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:02:58,420 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:02:58,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:02:58,507 WARN L234 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2022-11-19 07:02:58,507 WARN L234 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2022-11-19 07:02:58,591 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,602 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,603 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,604 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,609 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,617 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,620 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,623 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,624 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,625 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,627 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,628 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,632 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,666 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:02:58,668 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:02:58,669 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:02:58,672 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:02:58,674 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:02:58,674 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:02:58,675 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:02:58,676 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:02:58,676 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:02:58,677 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:02:58,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:02:58,723 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:02:58,758 WARN L234 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4493,4506] [2022-11-19 07:02:58,758 WARN L234 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_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/sv-benchmarks/c/aws-c-common/memset_using_uint64_harness.i[4553,4566] [2022-11-19 07:02:58,834 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,835 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,835 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,836 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,836 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,844 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,847 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,849 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,849 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,850 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,855 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,856 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,856 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:02:58,879 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:02:58,879 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:02:58,880 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:02:58,882 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:02:58,884 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:02:58,884 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:02:58,885 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:02:58,885 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:02:58,886 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:02:58,887 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:02:58,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:02:59,183 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:02:59,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59 WrapperNode [2022-11-19 07:02:59,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:02:59,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:02:59,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:02:59,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:02:59,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,316 INFO L138 Inliner]: procedures = 611, calls = 624, calls flagged for inlining = 38, calls inlined = 6, statements flattened = 122 [2022-11-19 07:02:59,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:02:59,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:02:59,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:02:59,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:02:59,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,376 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:02:59,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:02:59,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:02:59,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:02:59,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:02:59,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:59,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:02:59,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:02:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:02:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:02:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-11-19 07:02:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:02:59,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:02:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:02:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:02:59,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:02:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-19 07:02:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-19 07:02:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:02:59,486 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:02:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:02:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-19 07:02:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-19 07:02:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2022-11-19 07:02:59,487 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2022-11-19 07:02:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-19 07:02:59,488 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-19 07:02:59,864 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:02:59,867 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:03:02,485 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:03:02,493 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:03:02,493 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:03:02,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:03:02 BoogieIcfgContainer [2022-11-19 07:03:02,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:03:02,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:03:02,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:03:02,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:03:02,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:02:56" (1/3) ... [2022-11-19 07:03:02,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c3774a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:03:02, skipping insertion in model container [2022-11-19 07:03:02,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (2/3) ... [2022-11-19 07:03:02,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c3774a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:03:02, skipping insertion in model container [2022-11-19 07:03:02,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:03:02" (3/3) ... [2022-11-19 07:03:02,510 INFO L112 eAbstractionObserver]: Analyzing ICFG memset_using_uint64_harness.i [2022-11-19 07:03:02,530 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:03:02,531 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:03:02,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:03:02,615 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ef74c81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:03:02,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:03:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 54 states have internal predecessors, (71), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:03:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:03:02,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:02,633 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:03:02,634 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:02,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1430345650, now seen corresponding path program 1 times [2022-11-19 07:03:02,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:02,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411797788] [2022-11-19 07:03:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:02,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:02,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:02,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:02,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:03:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:03,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 07:03:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:03:03,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:03,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:03,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411797788] [2022-11-19 07:03:03,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411797788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:03,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:03,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:03:03,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723992004] [2022-11-19 07:03:03,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:03,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:03:03,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:03,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:03:03,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:03:03,127 INFO L87 Difference]: Start difference. First operand has 70 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 54 states have internal predecessors, (71), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:03:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:03,154 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2022-11-19 07:03:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:03:03,156 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-11-19 07:03:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:03,162 INFO L225 Difference]: With dead ends: 137 [2022-11-19 07:03:03,163 INFO L226 Difference]: Without dead ends: 62 [2022-11-19 07:03:03,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:03:03,169 INFO L413 NwaCegarLoop]: 89 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, 89 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 [2022-11-19 07:03:03,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:03:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-19 07:03:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-19 07:03:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 48 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:03:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-11-19 07:03:03,213 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 45 [2022-11-19 07:03:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:03,214 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-11-19 07:03:03,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:03:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-11-19 07:03:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:03:03,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:03,217 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:03:03,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-19 07:03:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:03,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1361752392, now seen corresponding path program 1 times [2022-11-19 07:03:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:03,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119684150] [2022-11-19 07:03:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:03,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:03,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:03,435 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:03,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:03:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:03,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:03:03,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:03:04,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:04,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:04,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119684150] [2022-11-19 07:03:04,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119684150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:04,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:04,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:03:04,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014088950] [2022-11-19 07:03:04,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:04,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:03:04,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:04,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:03:04,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:03:04,012 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:04,478 INFO L93 Difference]: Finished difference Result 158 states and 203 transitions. [2022-11-19 07:03:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:03:04,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-11-19 07:03:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:04,480 INFO L225 Difference]: With dead ends: 158 [2022-11-19 07:03:04,480 INFO L226 Difference]: Without dead ends: 109 [2022-11-19 07:03:04,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:03:04,482 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 48 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:04,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 438 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2022-11-19 07:03:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-19 07:03:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 67. [2022-11-19 07:03:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 52 states have internal predecessors, (64), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:03:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-11-19 07:03:04,497 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 45 [2022-11-19 07:03:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:04,498 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-11-19 07:03:04,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-11-19 07:03:04,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:03:04,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:04,500 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:03:04,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:04,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:04,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:04,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1127776570, now seen corresponding path program 1 times [2022-11-19 07:03:04,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:04,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284280305] [2022-11-19 07:03:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:04,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:04,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:04,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:04,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 07:03:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:05,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:03:05,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:03:05,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:05,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:05,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284280305] [2022-11-19 07:03:05,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284280305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:05,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:05,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:03:05,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717098460] [2022-11-19 07:03:05,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:05,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:03:05,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:05,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:03:05,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:03:05,525 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:05,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:05,913 INFO L93 Difference]: Finished difference Result 155 states and 198 transitions. [2022-11-19 07:03:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:05,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-11-19 07:03:05,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:05,921 INFO L225 Difference]: With dead ends: 155 [2022-11-19 07:03:05,921 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 07:03:05,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:03:05,923 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 48 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:05,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 355 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 77 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-19 07:03:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 07:03:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 71. [2022-11-19 07:03:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 56 states have internal predecessors, (69), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:03:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2022-11-19 07:03:05,944 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 45 [2022-11-19 07:03:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:05,944 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2022-11-19 07:03:05,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2022-11-19 07:03:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:03:05,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:05,949 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:03:05,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:06,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:06,165 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:06,166 INFO L85 PathProgramCache]: Analyzing trace with hash -561167172, now seen corresponding path program 1 times [2022-11-19 07:03:06,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:06,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102317940] [2022-11-19 07:03:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:06,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:06,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:06,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:06,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:03:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:03:06,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:03:06,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:06,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:06,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102317940] [2022-11-19 07:03:06,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102317940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:06,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:06,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:03:06,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784462863] [2022-11-19 07:03:06,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:06,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:03:06,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:06,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:03:06,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:03:06,917 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:07,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:07,249 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2022-11-19 07:03:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:07,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-11-19 07:03:07,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:07,252 INFO L225 Difference]: With dead ends: 123 [2022-11-19 07:03:07,252 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 07:03:07,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:03:07,254 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 17 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:07,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 364 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-19 07:03:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 07:03:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-11-19 07:03:07,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 58 states have internal predecessors, (71), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:03:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-11-19 07:03:07,270 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 45 [2022-11-19 07:03:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:07,273 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-11-19 07:03:07,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-11-19 07:03:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:03:07,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:07,279 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:03:07,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:07,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:07,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:07,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2145452222, now seen corresponding path program 1 times [2022-11-19 07:03:07,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:07,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603507127] [2022-11-19 07:03:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:07,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:07,495 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:07,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:03:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:07,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:03:07,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:03:08,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:08,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:08,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603507127] [2022-11-19 07:03:08,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603507127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:08,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:08,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:03:08,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184158431] [2022-11-19 07:03:08,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:08,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:03:08,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:03:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:03:08,323 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:08,671 INFO L93 Difference]: Finished difference Result 153 states and 194 transitions. [2022-11-19 07:03:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-11-19 07:03:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:08,673 INFO L225 Difference]: With dead ends: 153 [2022-11-19 07:03:08,673 INFO L226 Difference]: Without dead ends: 112 [2022-11-19 07:03:08,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:03:08,675 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 48 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:08,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 343 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 73 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-11-19 07:03:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-19 07:03:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 75. [2022-11-19 07:03:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 60 states have internal predecessors, (73), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:03:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2022-11-19 07:03:08,684 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 45 [2022-11-19 07:03:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:08,685 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2022-11-19 07:03:08,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2022-11-19 07:03:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:03:08,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:08,686 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:03:08,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:08,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:08,901 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:08,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:08,902 INFO L85 PathProgramCache]: Analyzing trace with hash 865588544, now seen corresponding path program 1 times [2022-11-19 07:03:08,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:08,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160345524] [2022-11-19 07:03:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:08,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:08,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:08,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:08,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-19 07:03:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:09,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:03:09,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:03:09,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:09,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160345524] [2022-11-19 07:03:09,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160345524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:09,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:09,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:03:09,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106471355] [2022-11-19 07:03:09,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:09,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:03:09,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:03:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:03:09,785 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:10,068 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2022-11-19 07:03:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:10,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-11-19 07:03:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:10,072 INFO L225 Difference]: With dead ends: 121 [2022-11-19 07:03:10,072 INFO L226 Difference]: Without dead ends: 82 [2022-11-19 07:03:10,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:03:10,073 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 17 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:10,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 346 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-11-19 07:03:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-19 07:03:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-11-19 07:03:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:03:10,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2022-11-19 07:03:10,092 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 45 [2022-11-19 07:03:10,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:10,092 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2022-11-19 07:03:10,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2022-11-19 07:03:10,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:03:10,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:10,097 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:03:10,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:10,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:10,317 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash 278782530, now seen corresponding path program 1 times [2022-11-19 07:03:10,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:10,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884107687] [2022-11-19 07:03:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:10,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:10,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:10,319 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:10,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 07:03:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:03:10,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:03:11,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:11,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:11,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884107687] [2022-11-19 07:03:11,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884107687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:11,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:11,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:03:11,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838289066] [2022-11-19 07:03:11,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:11,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:03:11,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:11,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:03:11,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:03:11,263 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:11,431 INFO L93 Difference]: Finished difference Result 117 states and 144 transitions. [2022-11-19 07:03:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:03:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-11-19 07:03:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:11,433 INFO L225 Difference]: With dead ends: 117 [2022-11-19 07:03:11,433 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 07:03:11,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:03:11,434 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 16 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:11,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 340 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-19 07:03:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 07:03:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-11-19 07:03:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 64 states have internal predecessors, (77), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:03:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2022-11-19 07:03:11,441 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 45 [2022-11-19 07:03:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:11,442 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2022-11-19 07:03:11,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2022-11-19 07:03:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:03:11,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:11,443 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:03:11,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:11,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:11,644 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:11,644 INFO L85 PathProgramCache]: Analyzing trace with hash 979847108, now seen corresponding path program 1 times [2022-11-19 07:03:11,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:11,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129335184] [2022-11-19 07:03:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:11,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:11,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:11,646 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:11,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 07:03:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:03:11,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:03:12,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:03:12,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129335184] [2022-11-19 07:03:12,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129335184] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:12,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:12,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-19 07:03:12,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017778354] [2022-11-19 07:03:12,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:12,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:03:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:12,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:03:12,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:03:12,613 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:14,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:03:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:14,975 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2022-11-19 07:03:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:03:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2022-11-19 07:03:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:14,977 INFO L225 Difference]: With dead ends: 140 [2022-11-19 07:03:14,977 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 07:03:14,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:03:14,978 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 126 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:14,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 316 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 07:03:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 07:03:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2022-11-19 07:03:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 78 states have internal predecessors, (96), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:03:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2022-11-19 07:03:14,987 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 45 [2022-11-19 07:03:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:14,988 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2022-11-19 07:03:14,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:03:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2022-11-19 07:03:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:03:14,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:14,989 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:03:15,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:15,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:15,199 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:15,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:15,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1659905478, now seen corresponding path program 1 times [2022-11-19 07:03:15,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:15,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144673667] [2022-11-19 07:03:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:15,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:15,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:15,201 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:15,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-19 07:03:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:03:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:03:15,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:15,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:15,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144673667] [2022-11-19 07:03:15,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144673667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:15,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:15,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:03:15,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468159296] [2022-11-19 07:03:15,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:15,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:03:15,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:03:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:03:15,698 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:03:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:15,872 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2022-11-19 07:03:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:03:15,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-11-19 07:03:15,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:15,873 INFO L225 Difference]: With dead ends: 99 [2022-11-19 07:03:15,873 INFO L226 Difference]: Without dead ends: 97 [2022-11-19 07:03:15,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:03:15,874 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 32 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:15,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 294 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:03:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-19 07:03:15,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-19 07:03:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 80 states have (on average 1.2375) internal successors, (99), 81 states have internal predecessors, (99), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 07:03:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2022-11-19 07:03:15,885 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 45 [2022-11-19 07:03:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:15,886 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2022-11-19 07:03:15,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:03:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2022-11-19 07:03:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 07:03:15,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:15,887 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:15,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:16,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:16,107 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash 990784662, now seen corresponding path program 1 times [2022-11-19 07:03:16,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:16,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529479431] [2022-11-19 07:03:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:16,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:16,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:16,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:16,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-19 07:03:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:16,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:03:16,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:03:16,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:16,727 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:16,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529479431] [2022-11-19 07:03:16,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529479431] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:16,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:16,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2022-11-19 07:03:16,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886462453] [2022-11-19 07:03:16,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:16,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:03:16,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:03:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:03:16,730 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 07:03:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:16,904 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2022-11-19 07:03:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:03:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 62 [2022-11-19 07:03:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:16,906 INFO L225 Difference]: With dead ends: 131 [2022-11-19 07:03:16,906 INFO L226 Difference]: Without dead ends: 103 [2022-11-19 07:03:16,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:03:16,907 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 56 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:16,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 291 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:03:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-19 07:03:16,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-11-19 07:03:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 84 states have internal predecessors, (102), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:03:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2022-11-19 07:03:16,918 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 62 [2022-11-19 07:03:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:16,918 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2022-11-19 07:03:16,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 07:03:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2022-11-19 07:03:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:03:16,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:16,920 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:16,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:17,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:17,139 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1705601977, now seen corresponding path program 1 times [2022-11-19 07:03:17,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:17,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387501019] [2022-11-19 07:03:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:17,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:17,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:17,142 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:17,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 07:03:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:17,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:03:17,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:03:17,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:17,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387501019] [2022-11-19 07:03:17,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387501019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:17,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:17,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:17,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106715962] [2022-11-19 07:03:17,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:17,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:17,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:17,416 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:03:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:17,537 INFO L93 Difference]: Finished difference Result 182 states and 228 transitions. [2022-11-19 07:03:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2022-11-19 07:03:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:17,540 INFO L225 Difference]: With dead ends: 182 [2022-11-19 07:03:17,540 INFO L226 Difference]: Without dead ends: 115 [2022-11-19 07:03:17,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:17,541 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:17,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 133 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:03:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-19 07:03:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2022-11-19 07:03:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 96 states have internal predecessors, (109), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:03:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2022-11-19 07:03:17,551 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 63 [2022-11-19 07:03:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:17,552 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2022-11-19 07:03:17,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:03:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2022-11-19 07:03:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:03:17,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:17,553 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:17,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:17,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:17,763 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1560006021, now seen corresponding path program 1 times [2022-11-19 07:03:17,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:17,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591396124] [2022-11-19 07:03:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:17,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:17,765 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:17,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 07:03:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:18,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:03:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:03:18,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:18,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591396124] [2022-11-19 07:03:18,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591396124] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:18,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:18,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-11-19 07:03:18,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467598606] [2022-11-19 07:03:18,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:18,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:03:18,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:18,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:03:18,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:03:18,759 INFO L87 Difference]: Start difference. First operand 113 states and 133 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:03:20,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:03:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:21,068 INFO L93 Difference]: Finished difference Result 164 states and 194 transitions. [2022-11-19 07:03:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:03:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2022-11-19 07:03:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:21,070 INFO L225 Difference]: With dead ends: 164 [2022-11-19 07:03:21,070 INFO L226 Difference]: Without dead ends: 128 [2022-11-19 07:03:21,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:03:21,071 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 12 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:21,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 258 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 07:03:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-19 07:03:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2022-11-19 07:03:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 98 states have internal predecessors, (111), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:03:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-11-19 07:03:21,080 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 63 [2022-11-19 07:03:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:21,081 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-11-19 07:03:21,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:03:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-11-19 07:03:21,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:03:21,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:21,082 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:21,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:21,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:21,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1497966407, now seen corresponding path program 1 times [2022-11-19 07:03:21,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:21,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526735871] [2022-11-19 07:03:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:21,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:21,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:21,285 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:21,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 07:03:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:21,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:03:21,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:03:21,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:22,063 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:22,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526735871] [2022-11-19 07:03:22,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526735871] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:22,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:22,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 14 [2022-11-19 07:03:22,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457830720] [2022-11-19 07:03:22,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:22,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:03:22,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:03:22,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:03:22,065 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:22,617 INFO L93 Difference]: Finished difference Result 220 states and 261 transitions. [2022-11-19 07:03:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:03:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2022-11-19 07:03:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:22,620 INFO L225 Difference]: With dead ends: 220 [2022-11-19 07:03:22,621 INFO L226 Difference]: Without dead ends: 165 [2022-11-19 07:03:22,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:03:22,623 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 126 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:22,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 351 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:03:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-19 07:03:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 121. [2022-11-19 07:03:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 103 states have internal predecessors, (117), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:03:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2022-11-19 07:03:22,639 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 63 [2022-11-19 07:03:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:22,639 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2022-11-19 07:03:22,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:22,640 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2022-11-19 07:03:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:03:22,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:22,643 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:22,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:22,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:22,858 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash 395834293, now seen corresponding path program 1 times [2022-11-19 07:03:22,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:22,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386441691] [2022-11-19 07:03:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:22,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:22,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:22,861 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:22,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 07:03:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:03:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:03:23,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:24,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386441691] [2022-11-19 07:03:24,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386441691] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:24,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:24,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2022-11-19 07:03:24,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629245348] [2022-11-19 07:03:24,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:24,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:03:24,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:03:24,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:03:24,201 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:24,938 INFO L93 Difference]: Finished difference Result 221 states and 262 transitions. [2022-11-19 07:03:24,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:24,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2022-11-19 07:03:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:24,941 INFO L225 Difference]: With dead ends: 221 [2022-11-19 07:03:24,941 INFO L226 Difference]: Without dead ends: 150 [2022-11-19 07:03:24,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:03:24,942 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 161 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:24,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 356 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:03:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-19 07:03:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 115. [2022-11-19 07:03:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 97 states have internal predecessors, (110), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:03:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2022-11-19 07:03:24,958 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 63 [2022-11-19 07:03:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:24,958 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2022-11-19 07:03:24,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2022-11-19 07:03:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:03:24,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:24,960 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:24,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-19 07:03:25,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:25,174 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1467507, now seen corresponding path program 1 times [2022-11-19 07:03:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:25,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469533652] [2022-11-19 07:03:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:25,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:25,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:25,177 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:25,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-19 07:03:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:03:25,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:03:26,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:26,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:26,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469533652] [2022-11-19 07:03:26,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469533652] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:26,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:26,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2022-11-19 07:03:26,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164822808] [2022-11-19 07:03:26,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:26,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:03:26,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:26,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:03:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:03:26,712 INFO L87 Difference]: Start difference. First operand 115 states and 136 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:27,746 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2022-11-19 07:03:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:27,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2022-11-19 07:03:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:27,748 INFO L225 Difference]: With dead ends: 197 [2022-11-19 07:03:27,748 INFO L226 Difference]: Without dead ends: 148 [2022-11-19 07:03:27,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:03:27,749 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 118 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:27,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 508 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:03:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-19 07:03:27,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 117. [2022-11-19 07:03:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 99 states have internal predecessors, (112), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:03:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2022-11-19 07:03:27,765 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 63 [2022-11-19 07:03:27,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:27,766 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2022-11-19 07:03:27,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:27,766 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2022-11-19 07:03:27,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:03:27,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:27,767 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:27,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-19 07:03:27,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:27,982 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:27,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2052451505, now seen corresponding path program 1 times [2022-11-19 07:03:27,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:27,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603489730] [2022-11-19 07:03:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:27,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:27,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:27,985 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:27,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-19 07:03:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:28,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:03:28,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:03:28,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:29,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:29,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603489730] [2022-11-19 07:03:29,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603489730] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:29,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:29,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-11-19 07:03:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168977957] [2022-11-19 07:03:29,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:29,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:03:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:03:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:03:29,192 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:29,760 INFO L93 Difference]: Finished difference Result 193 states and 229 transitions. [2022-11-19 07:03:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:29,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2022-11-19 07:03:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:29,762 INFO L225 Difference]: With dead ends: 193 [2022-11-19 07:03:29,763 INFO L226 Difference]: Without dead ends: 146 [2022-11-19 07:03:29,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:03:29,764 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 198 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:29,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 336 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:03:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-19 07:03:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2022-11-19 07:03:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 100 states have (on average 1.14) internal successors, (114), 101 states have internal predecessors, (114), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:03:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2022-11-19 07:03:29,785 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 63 [2022-11-19 07:03:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:29,787 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2022-11-19 07:03:29,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2022-11-19 07:03:29,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:03:29,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:29,791 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:29,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:30,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:30,003 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:30,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:30,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1967756177, now seen corresponding path program 1 times [2022-11-19 07:03:30,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:30,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835875505] [2022-11-19 07:03:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:30,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:30,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:30,005 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:30,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 07:03:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:30,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:03:30,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:03:30,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:31,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:31,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835875505] [2022-11-19 07:03:31,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835875505] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:31,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:31,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-11-19 07:03:31,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822875318] [2022-11-19 07:03:31,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:31,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:03:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:03:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:03:31,139 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:31,806 INFO L93 Difference]: Finished difference Result 189 states and 224 transitions. [2022-11-19 07:03:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2022-11-19 07:03:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:31,808 INFO L225 Difference]: With dead ends: 189 [2022-11-19 07:03:31,808 INFO L226 Difference]: Without dead ends: 144 [2022-11-19 07:03:31,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:03:31,814 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 128 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:31,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 415 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:03:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-19 07:03:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-11-19 07:03:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:03:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2022-11-19 07:03:31,836 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 63 [2022-11-19 07:03:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:31,837 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2022-11-19 07:03:31,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2022-11-19 07:03:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:03:31,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:31,838 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:31,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:32,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:32,054 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:32,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:32,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1945123923, now seen corresponding path program 1 times [2022-11-19 07:03:32,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:32,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98095116] [2022-11-19 07:03:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:32,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:32,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:32,056 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:32,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-19 07:03:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:32,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:03:32,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:03:32,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:33,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:33,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98095116] [2022-11-19 07:03:33,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98095116] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:33,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:33,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-11-19 07:03:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888361671] [2022-11-19 07:03:33,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:33,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:03:33,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:03:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:03:33,316 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:34,081 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2022-11-19 07:03:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:34,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2022-11-19 07:03:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:34,083 INFO L225 Difference]: With dead ends: 186 [2022-11-19 07:03:34,083 INFO L226 Difference]: Without dead ends: 143 [2022-11-19 07:03:34,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:03:34,084 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 159 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:34,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 425 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:03:34,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-19 07:03:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2022-11-19 07:03:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 105 states have internal predecessors, (118), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:03:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2022-11-19 07:03:34,106 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 63 [2022-11-19 07:03:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:34,108 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2022-11-19 07:03:34,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2022-11-19 07:03:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:03:34,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:34,109 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:34,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:34,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:34,324 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:34,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:34,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1840370283, now seen corresponding path program 1 times [2022-11-19 07:03:34,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:34,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024945257] [2022-11-19 07:03:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:34,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:34,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:34,326 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:34,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-19 07:03:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:34,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:03:34,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:03:34,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:35,003 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:35,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024945257] [2022-11-19 07:03:35,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024945257] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:35,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:35,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-19 07:03:35,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275162562] [2022-11-19 07:03:35,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:35,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:03:35,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:03:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:03:35,005 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 07:03:37,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:03:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:38,710 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2022-11-19 07:03:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:38,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-11-19 07:03:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:38,712 INFO L225 Difference]: With dead ends: 190 [2022-11-19 07:03:38,712 INFO L226 Difference]: Without dead ends: 154 [2022-11-19 07:03:38,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:03:38,713 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 105 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:38,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 482 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 77 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-19 07:03:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-19 07:03:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2022-11-19 07:03:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 107 states have internal predecessors, (121), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:03:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2022-11-19 07:03:38,736 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 63 [2022-11-19 07:03:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:38,736 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2022-11-19 07:03:38,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 07:03:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2022-11-19 07:03:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:03:38,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:38,738 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:38,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:38,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:38,947 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:38,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1435540623, now seen corresponding path program 1 times [2022-11-19 07:03:38,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:38,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678040842] [2022-11-19 07:03:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:38,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:38,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:38,949 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:38,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-19 07:03:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:39,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:03:39,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:03:39,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:03:40,238 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:40,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678040842] [2022-11-19 07:03:40,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678040842] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:40,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:40,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-19 07:03:40,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116061417] [2022-11-19 07:03:40,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:40,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:03:40,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:40,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:03:40,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:03:40,240 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:42,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:03:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:42,788 INFO L93 Difference]: Finished difference Result 169 states and 195 transitions. [2022-11-19 07:03:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:03:42,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 65 [2022-11-19 07:03:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:42,790 INFO L225 Difference]: With dead ends: 169 [2022-11-19 07:03:42,790 INFO L226 Difference]: Without dead ends: 108 [2022-11-19 07:03:42,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:03:42,791 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 125 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:42,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 294 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-19 07:03:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-19 07:03:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-11-19 07:03:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 89 states have internal predecessors, (101), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:03:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-11-19 07:03:42,813 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 65 [2022-11-19 07:03:42,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:42,813 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-11-19 07:03:42,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:03:42,813 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-11-19 07:03:42,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:03:42,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:42,814 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:42,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:43,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:43,031 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:43,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1286455351, now seen corresponding path program 1 times [2022-11-19 07:03:43,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:43,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838709189] [2022-11-19 07:03:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:43,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:43,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:43,033 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:43,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 07:03:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:43,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:03:43,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:03:43,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:44,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:44,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838709189] [2022-11-19 07:03:44,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838709189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:44,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [75841754] [2022-11-19 07:03:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:44,081 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:03:44,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:03:44,083 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:03:44,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-19 07:03:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:44,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:03:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:03:44,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:44,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [75841754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:44,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262189442] [2022-11-19 07:03:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:44,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:44,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:44,819 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:44,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 07:03:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:45,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:03:45,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:03:45,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:45,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262189442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:45,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:03:45,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 8, 8, 8] total 19 [2022-11-19 07:03:45,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549602054] [2022-11-19 07:03:45,238 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:45,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:03:45,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:03:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:03:45,239 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 07:03:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:46,935 INFO L93 Difference]: Finished difference Result 262 states and 319 transitions. [2022-11-19 07:03:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:03:46,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 65 [2022-11-19 07:03:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:46,937 INFO L225 Difference]: With dead ends: 262 [2022-11-19 07:03:46,937 INFO L226 Difference]: Without dead ends: 207 [2022-11-19 07:03:46,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:03:46,939 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 280 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:46,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 938 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 357 Invalid, 0 Unknown, 50 Unchecked, 1.0s Time] [2022-11-19 07:03:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-19 07:03:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 117. [2022-11-19 07:03:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 98 states have (on average 1.163265306122449) internal successors, (114), 99 states have internal predecessors, (114), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 07:03:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2022-11-19 07:03:46,958 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 65 [2022-11-19 07:03:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:46,958 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2022-11-19 07:03:46,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 07:03:46,958 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2022-11-19 07:03:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:03:46,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:46,959 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:46,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:47,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:47,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:47,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:03:47,580 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1114711245, now seen corresponding path program 1 times [2022-11-19 07:03:47,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:47,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34602140] [2022-11-19 07:03:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:47,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:47,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:47,582 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:47,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-19 07:03:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:47,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:03:47,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:03:48,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:49,256 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:49,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34602140] [2022-11-19 07:03:49,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34602140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:49,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1806374488] [2022-11-19 07:03:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:49,257 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:03:49,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:03:49,258 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:03:49,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-19 07:03:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:49,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:03:49,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:03:50,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:50,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1806374488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:50,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193862611] [2022-11-19 07:03:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:50,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:50,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:50,783 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:50,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:03:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:51,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:03:51,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:03:51,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:51,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193862611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:51,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:03:51,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10, 10, 10, 10] total 29 [2022-11-19 07:03:51,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928616801] [2022-11-19 07:03:51,235 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:51,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 07:03:51,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:51,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 07:03:51,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:03:51,237 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-19 07:03:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:53,448 INFO L93 Difference]: Finished difference Result 253 states and 308 transitions. [2022-11-19 07:03:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:03:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 65 [2022-11-19 07:03:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:53,453 INFO L225 Difference]: With dead ends: 253 [2022-11-19 07:03:53,453 INFO L226 Difference]: Without dead ends: 200 [2022-11-19 07:03:53,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 357 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=346, Invalid=1294, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:03:53,454 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 176 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:53,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1309 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 410 Invalid, 0 Unknown, 83 Unchecked, 1.1s Time] [2022-11-19 07:03:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-19 07:03:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 128. [2022-11-19 07:03:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 109 states have internal predecessors, (125), 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) [2022-11-19 07:03:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 153 transitions. [2022-11-19 07:03:53,480 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 153 transitions. Word has length 65 [2022-11-19 07:03:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:53,481 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 153 transitions. [2022-11-19 07:03:53,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-19 07:03:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 153 transitions. [2022-11-19 07:03:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:03:53,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:53,482 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:53,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:53,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:53,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:54,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:03:54,092 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:54,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1509078031, now seen corresponding path program 1 times [2022-11-19 07:03:54,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:03:54,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489424621] [2022-11-19 07:03:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:54,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:03:54,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:03:54,094 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:03:54,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-19 07:03:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:54,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:03:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:03:55,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:55,919 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:03:55,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489424621] [2022-11-19 07:03:55,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489424621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:55,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [439148993] [2022-11-19 07:03:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:55,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:03:55,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:03:55,920 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:03:55,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-19 07:03:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:56,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:03:56,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:03:57,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:57,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [439148993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:57,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462121744] [2022-11-19 07:03:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:57,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:57,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:57,986 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:57,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 07:03:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:03:58,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:03:58,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:58,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462121744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:58,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:03:58,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10, 10, 10, 10] total 37 [2022-11-19 07:03:58,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863381339] [2022-11-19 07:03:58,879 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-19 07:03:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:03:58,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-19 07:03:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:03:58,881 INFO L87 Difference]: Start difference. First operand 128 states and 153 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 11 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-19 07:04:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:01,758 INFO L93 Difference]: Finished difference Result 250 states and 302 transitions. [2022-11-19 07:04:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 07:04:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 11 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) Word has length 65 [2022-11-19 07:04:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:01,767 INFO L225 Difference]: With dead ends: 250 [2022-11-19 07:04:01,767 INFO L226 Difference]: Without dead ends: 201 [2022-11-19 07:04:01,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 347 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 07:04:01,769 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 434 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:01,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1076 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 521 Invalid, 0 Unknown, 165 Unchecked, 1.3s Time] [2022-11-19 07:04:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-19 07:04:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2022-11-19 07:04:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 111 states have internal predecessors, (127), 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) [2022-11-19 07:04:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2022-11-19 07:04:01,796 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 65 [2022-11-19 07:04:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:01,797 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2022-11-19 07:04:01,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 11 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 12 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-19 07:04:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2022-11-19 07:04:01,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:04:01,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:01,799 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:01,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:02,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:02,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:02,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:04:02,413 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:02,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:02,413 INFO L85 PathProgramCache]: Analyzing trace with hash 541905967, now seen corresponding path program 1 times [2022-11-19 07:04:02,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:04:02,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842720191] [2022-11-19 07:04:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:02,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:04:02,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:04:02,415 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:04:02,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-19 07:04:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:02,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:04:02,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:04:03,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:04:03,869 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:04:03,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842720191] [2022-11-19 07:04:03,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842720191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:03,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681324740] [2022-11-19 07:04:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:03,869 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:04:03,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:04:03,870 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:04:03,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-19 07:04:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:04,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:04:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:04:04,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:04:04,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1681324740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:04,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354227732] [2022-11-19 07:04:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:04,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:04,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:04,787 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:04,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-19 07:04:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:05,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:04:05,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:04:05,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:04:05,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354227732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:05,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:04:05,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10, 10, 10, 10] total 23 [2022-11-19 07:04:05,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450858560] [2022-11-19 07:04:05,311 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:05,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:04:05,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:04:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:04:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:04:05,313 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 07:04:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:06,694 INFO L93 Difference]: Finished difference Result 197 states and 229 transitions. [2022-11-19 07:04:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:04:06,695 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 65 [2022-11-19 07:04:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:06,696 INFO L225 Difference]: With dead ends: 197 [2022-11-19 07:04:06,696 INFO L226 Difference]: Without dead ends: 150 [2022-11-19 07:04:06,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:04:06,697 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 62 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:06,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 731 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 260 Invalid, 0 Unknown, 48 Unchecked, 0.7s Time] [2022-11-19 07:04:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-19 07:04:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2022-11-19 07:04:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 122 states have (on average 1.139344262295082) internal successors, (139), 123 states have internal predecessors, (139), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:04:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 169 transitions. [2022-11-19 07:04:06,724 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 169 transitions. Word has length 65 [2022-11-19 07:04:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:06,725 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 169 transitions. [2022-11-19 07:04:06,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 07:04:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 169 transitions. [2022-11-19 07:04:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:04:06,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:06,726 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:06,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:06,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:07,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:07,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:04:07,335 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:07,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:07,335 INFO L85 PathProgramCache]: Analyzing trace with hash 816665581, now seen corresponding path program 1 times [2022-11-19 07:04:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:04:07,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989443339] [2022-11-19 07:04:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:07,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:04:07,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:04:07,337 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:04:07,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-19 07:04:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:04:07,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:04:08,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:04:08,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:04:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989443339] [2022-11-19 07:04:08,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989443339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [653520104] [2022-11-19 07:04:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:08,820 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:04:08,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:04:08,823 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:04:08,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-19 07:04:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:09,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:04:09,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:04:10,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:04:10,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [653520104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194730540] [2022-11-19 07:04:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:10,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:10,371 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:10,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-19 07:04:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:10,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:04:10,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:04:10,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:04:11,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194730540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:11,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:04:11,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10, 10, 10, 10] total 30 [2022-11-19 07:04:11,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696764808] [2022-11-19 07:04:11,056 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:11,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 07:04:11,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:04:11,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 07:04:11,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:04:11,058 INFO L87 Difference]: Start difference. First operand 143 states and 169 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-19 07:04:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:12,594 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2022-11-19 07:04:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:04:12,595 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 65 [2022-11-19 07:04:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:12,596 INFO L225 Difference]: With dead ends: 229 [2022-11-19 07:04:12,596 INFO L226 Difference]: Without dead ends: 184 [2022-11-19 07:04:12,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:04:12,598 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 89 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:12,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 971 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 392 Invalid, 0 Unknown, 33 Unchecked, 0.9s Time] [2022-11-19 07:04:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-19 07:04:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 151. [2022-11-19 07:04:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 131 states have internal predecessors, (147), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 07:04:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 177 transitions. [2022-11-19 07:04:12,626 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 177 transitions. Word has length 65 [2022-11-19 07:04:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:12,627 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 177 transitions. [2022-11-19 07:04:12,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-19 07:04:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 177 transitions. [2022-11-19 07:04:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:04:12,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:12,628 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:12,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:12,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-19 07:04:13,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:13,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:13,233 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash 839297835, now seen corresponding path program 1 times [2022-11-19 07:04:13,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:04:13,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100102329] [2022-11-19 07:04:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:13,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:04:13,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:04:13,235 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:04:13,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-19 07:04:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-19 07:04:13,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:13,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:04:16,075 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2022-11-19 07:04:16,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:04:19,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:19,100 INFO L321 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2022-11-19 07:04:19,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 21 [2022-11-19 07:04:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:04:19,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:20,739 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:04:20,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100102329] [2022-11-19 07:04:20,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100102329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:20,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1840212698] [2022-11-19 07:04:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:20,739 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:04:20,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:04:20,743 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:04:20,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-19 07:04:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:21,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 07:04:21,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:21,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:04:22,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:22,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-19 07:04:34,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:34,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 07:05:44,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:44,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:05:44,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 18 [2022-11-19 07:05:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:05:44,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:44,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1840212698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:44,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833121832] [2022-11-19 07:05:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:44,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:44,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:44,368 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:44,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 07:05:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:44,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 07:05:44,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:44,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:05:45,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:05:49,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:05:52,289 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8| (_ BitVec 64)) (|ULTIMATE.start_memset_using_uint64_impl_~c#1| (_ BitVec 32))) (let ((.cse0 ((_ extract 7 0) |ULTIMATE.start_memset_using_uint64_impl_~c#1|))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_8|) (_ bv0 64)) .cse0) (= .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_8|) (_ bv0 64)))))) is different from true [2022-11-19 07:05:54,826 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9| (_ BitVec 64)) (|ULTIMATE.start_memset_using_uint64_impl_~c#1| (_ BitVec 32)) (|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9| (_ BitVec 64))) (let ((.cse0 ((_ extract 7 0) |ULTIMATE.start_memset_using_uint64_impl_~c#1|))) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9|) (_ bv0 64)) .cse0) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9|) (_ bv0 64)) .cse0) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_9| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_9|))))) is different from true [2022-11-19 07:05:57,340 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10| (_ BitVec 64)) (|ULTIMATE.start_memset_using_uint64_impl_~c#1| (_ BitVec 32))) (let ((.cse0 ((_ extract 7 0) |ULTIMATE.start_memset_using_uint64_impl_~c#1|))) (and (= .cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10|) (_ bv0 64))) (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_10|)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_10|) (_ bv0 64)) .cse0)))) is different from true [2022-11-19 07:06:06,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:06:06,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-11-19 07:06:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2022-11-19 07:06:06,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:06:06,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833121832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:06,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:06:06,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 26] total 57 [2022-11-19 07:06:06,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897648035] [2022-11-19 07:06:06,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:06:06,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-19 07:06:06,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:06:06,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-19 07:06:06,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=3015, Unknown=19, NotChecked=342, Total=3660 [2022-11-19 07:06:06,797 INFO L87 Difference]: Start difference. First operand 151 states and 177 transitions. Second operand has 57 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 50 states have internal predecessors, (131), 14 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) [2022-11-19 07:07:20,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:07:24,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:07:48,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:07:50,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:07:52,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:07:54,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:07:56,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:07:58,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:00,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:02,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:04,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:06,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:08,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:10,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:12,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:14,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:20,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:25,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:25,814 INFO L93 Difference]: Finished difference Result 272 states and 316 transitions. [2022-11-19 07:08:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 07:08:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 50 states have internal predecessors, (131), 14 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) Word has length 65 [2022-11-19 07:08:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:25,818 INFO L225 Difference]: With dead ends: 272 [2022-11-19 07:08:25,818 INFO L226 Difference]: Without dead ends: 219 [2022-11-19 07:08:25,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 142 SyntacticMatches, 19 SemanticMatches, 81 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 197.0s TimeCoverageRelationStatistics Valid=610, Invalid=5672, Unknown=50, NotChecked=474, Total=6806 [2022-11-19 07:08:25,821 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 348 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 48 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 1013 IncrementalHoareTripleChecker+Unchecked, 48.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:25,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 1636 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1158 Invalid, 15 Unknown, 1013 Unchecked, 48.6s Time] [2022-11-19 07:08:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-19 07:08:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 189. [2022-11-19 07:08:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 158 states have (on average 1.1265822784810127) internal successors, (178), 160 states have internal predecessors, (178), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 07:08:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 216 transitions. [2022-11-19 07:08:25,884 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 216 transitions. Word has length 65 [2022-11-19 07:08:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:25,885 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 216 transitions. [2022-11-19 07:08:25,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 50 states have internal predecessors, (131), 14 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 15 states have call predecessors, (18), 12 states have call successors, (18) [2022-11-19 07:08:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 216 transitions. [2022-11-19 07:08:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 07:08:25,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:25,887 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:25,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:26,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-19 07:08:26,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:26,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:26,496 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:08:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash 329824745, now seen corresponding path program 1 times [2022-11-19 07:08:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:26,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829216874] [2022-11-19 07:08:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:26,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:26,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:26,498 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:26,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-19 07:08:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:26,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:08:26,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:08:27,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:08:28,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:28,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829216874] [2022-11-19 07:08:28,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829216874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:28,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [875027498] [2022-11-19 07:08:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:28,781 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:28,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:28,783 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:28,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-19 07:08:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:29,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:08:29,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:08:29,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:08:30,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [875027498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:30,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405785261] [2022-11-19 07:08:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:30,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:30,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:08:30,788 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:08:30,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-19 07:08:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:31,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:08:31,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:08:31,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:08:31,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405785261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:31,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:08:31,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9, 9, 10, 10] total 34 [2022-11-19 07:08:31,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350907886] [2022-11-19 07:08:31,792 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:08:31,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:08:31,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:08:31,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:08:31,794 INFO L87 Difference]: Start difference. First operand 189 states and 216 transitions. Second operand has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 33 states have internal predecessors, (122), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-19 07:08:35,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:46,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:08:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:53,642 INFO L93 Difference]: Finished difference Result 265 states and 309 transitions. [2022-11-19 07:08:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:08:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 33 states have internal predecessors, (122), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 65 [2022-11-19 07:08:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:53,644 INFO L225 Difference]: With dead ends: 265 [2022-11-19 07:08:53,644 INFO L226 Difference]: Without dead ends: 222 [2022-11-19 07:08:53,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 350 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 07:08:53,646 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 197 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 68 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:53,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1354 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 540 Invalid, 2 Unknown, 155 Unchecked, 20.6s Time] [2022-11-19 07:08:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-19 07:08:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 189. [2022-11-19 07:08:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 158 states have (on average 1.120253164556962) internal successors, (177), 160 states have internal predecessors, (177), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 07:08:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 215 transitions. [2022-11-19 07:08:53,687 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 215 transitions. Word has length 65 [2022-11-19 07:08:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:53,687 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 215 transitions. [2022-11-19 07:08:53,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.588235294117647) internal successors, (122), 33 states have internal predecessors, (122), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-19 07:08:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 215 transitions. [2022-11-19 07:08:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:08:53,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:53,689 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:53,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:53,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:54,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:54,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:54,290 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:08:54,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1592252509, now seen corresponding path program 1 times [2022-11-19 07:08:54,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:54,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168638084] [2022-11-19 07:08:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:54,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:54,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:54,292 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:54,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-19 07:08:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:08:54,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:08:54,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:08:55,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:55,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168638084] [2022-11-19 07:08:55,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168638084] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:08:55,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:08:55,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-11-19 07:08:55,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934718200] [2022-11-19 07:08:55,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:08:55,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:08:55,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:08:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:08:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:08:55,230 INFO L87 Difference]: Start difference. First operand 189 states and 215 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:08:55,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:08:55,475 INFO L93 Difference]: Finished difference Result 211 states and 236 transitions. [2022-11-19 07:08:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:08:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 66 [2022-11-19 07:08:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:08:55,476 INFO L225 Difference]: With dead ends: 211 [2022-11-19 07:08:55,477 INFO L226 Difference]: Without dead ends: 164 [2022-11-19 07:08:55,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:08:55,478 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 68 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:08:55,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 306 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:08:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-19 07:08:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-11-19 07:08:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 137 states have internal predecessors, (153), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 07:08:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 187 transitions. [2022-11-19 07:08:55,519 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 187 transitions. Word has length 66 [2022-11-19 07:08:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:08:55,519 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 187 transitions. [2022-11-19 07:08:55,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:08:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 187 transitions. [2022-11-19 07:08:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:08:55,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:08:55,521 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:08:55,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-19 07:08:55,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:55,736 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:08:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:08:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1477592399, now seen corresponding path program 1 times [2022-11-19 07:08:55,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:08:55,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089347886] [2022-11-19 07:08:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:55,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:08:55,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:08:55,738 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:08:55,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-19 07:08:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:56,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:08:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:08:56,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:08:57,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:08:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089347886] [2022-11-19 07:08:57,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089347886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1008986341] [2022-11-19 07:08:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:57,915 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:08:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:08:57,916 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:08:57,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-19 07:08:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:08:58,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:08:58,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:08:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:08:58,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:08:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:08:59,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1008986341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:08:59,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661793004] [2022-11-19 07:08:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:08:59,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:08:59,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:08:59,833 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:08:59,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-19 07:09:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:00,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:09:00,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:09:00,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:09:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:09:00,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661793004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:09:00,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:09:00,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8, 8, 11, 8] total 29 [2022-11-19 07:09:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605683124] [2022-11-19 07:09:00,499 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:09:00,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 07:09:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:09:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 07:09:00,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:09:00,501 INFO L87 Difference]: Start difference. First operand 164 states and 187 transitions. Second operand has 29 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 28 states have internal predecessors, (111), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-19 07:09:04,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:06,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:09:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:09:08,057 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-11-19 07:09:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:09:08,058 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 28 states have internal predecessors, (111), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 67 [2022-11-19 07:09:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:09:08,059 INFO L225 Difference]: With dead ends: 233 [2022-11-19 07:09:08,059 INFO L226 Difference]: Without dead ends: 193 [2022-11-19 07:09:08,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 369 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:09:08,060 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 290 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 44 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:09:08,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1507 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 410 Invalid, 2 Unknown, 80 Unchecked, 6.5s Time] [2022-11-19 07:09:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-19 07:09:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2022-11-19 07:09:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 149 states have (on average 1.1275167785234899) internal successors, (168), 151 states have internal predecessors, (168), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 07:09:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 202 transitions. [2022-11-19 07:09:08,106 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 202 transitions. Word has length 67 [2022-11-19 07:09:08,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:09:08,106 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 202 transitions. [2022-11-19 07:09:08,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 28 states have internal predecessors, (111), 9 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-19 07:09:08,107 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 202 transitions. [2022-11-19 07:09:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:09:08,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:09:08,108 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:09:08,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-19 07:09:08,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-19 07:09:08,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-19 07:09:08,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:09:08,714 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:09:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:09:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash 881349611, now seen corresponding path program 2 times [2022-11-19 07:09:08,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:09:08,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449288145] [2022-11-19 07:09:08,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:09:08,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:09:08,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:09:08,716 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:09:08,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-19 07:09:09,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:09:09,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:09:09,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-19 07:09:09,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:09,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:09:09,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:09:10,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:10,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:09:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:12,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-11-19 07:09:13,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:13,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:09:13,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-19 07:09:58,620 INFO L321 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2022-11-19 07:09:58,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 29 [2022-11-19 07:09:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:09:59,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:01,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:10:01,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449288145] [2022-11-19 07:10:01,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449288145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:10:01,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2007400562] [2022-11-19 07:10:01,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:10:01,082 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:10:01,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:10:01,086 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:10:01,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-19 07:10:01,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:10:01,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:10:01,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-19 07:10:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:02,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:10:05,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:05,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-19 07:10:06,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:06,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:10:06,176 INFO L321 Elim1Store]: treesize reduction 14, result has 44.0 percent of original size [2022-11-19 07:10:06,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-11-19 07:10:18,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:18,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:10:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:18,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:10:18,563 INFO L321 Elim1Store]: treesize reduction 22, result has 33.3 percent of original size [2022-11-19 07:10:18,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 53 [2022-11-19 07:10:21,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:21,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:21,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:10:21,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:10:21,296 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-19 07:10:21,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 63 [2022-11-19 07:10:40,866 INFO L321 Elim1Store]: treesize reduction 50, result has 31.5 percent of original size [2022-11-19 07:10:40,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 55 [2022-11-19 07:10:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:10:41,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:10:41,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2007400562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:10:41,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064437329] [2022-11-19 07:10:41,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:10:41,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:10:41,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:10:41,298 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:10:41,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-19 07:10:41,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:10:41,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:10:41,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-19 07:10:41,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:10:41,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:10:41,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:10:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:42,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 07:10:52,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:52,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-11-19 07:10:53,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:53,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:10:53,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-19 07:11:13,693 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_memset_using_uint64_impl_~c#1| (_ BitVec 32)) (|v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_18| (_ BitVec 64)) (|v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_18| (_ BitVec 64))) (let ((.cse2 (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_18|)) (.cse0 (select |c_#memory_int| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_18|)) (.cse1 ((_ extract 7 0) |ULTIMATE.start_memset_using_uint64_impl_~c#1|))) (and (not (= |v_ULTIMATE.start_assert_bytes_match_~a#1.base_BEFORE_CALL_18| |v_ULTIMATE.start_assert_bytes_match_~b#1.base_BEFORE_CALL_18|)) (= (select .cse0 (_ bv0 64)) .cse1) (= .cse1 (select .cse2 (_ bv1 64))) (= (select .cse2 (_ bv0 64)) .cse1) (= (select .cse0 (_ bv1 64)) .cse1)))) is different from true [2022-11-19 07:11:30,077 INFO L321 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2022-11-19 07:11:30,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 29 [2022-11-19 07:11:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:11:30,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:11:30,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064437329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:11:30,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:11:30,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 29] total 57 [2022-11-19 07:11:30,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402639012] [2022-11-19 07:11:30,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:11:30,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-19 07:11:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:11:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-19 07:11:30,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3258, Unknown=9, NotChecked=116, Total=3660 [2022-11-19 07:11:30,263 INFO L87 Difference]: Start difference. First operand 178 states and 202 transitions. Second operand has 57 states, 54 states have (on average 2.3703703703703702) internal successors, (128), 53 states have internal predecessors, (128), 11 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (14), 11 states have call predecessors, (14), 9 states have call successors, (14) [2022-11-19 07:12:15,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:17,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:20,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:22,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:24,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:26,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:28,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:30,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:32,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:34,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:36,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:38,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:40,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:42,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:47,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:12:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:54,064 INFO L93 Difference]: Finished difference Result 296 states and 328 transitions. [2022-11-19 07:12:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-19 07:12:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 2.3703703703703702) internal successors, (128), 53 states have internal predecessors, (128), 11 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (14), 11 states have call predecessors, (14), 9 states have call successors, (14) Word has length 67 [2022-11-19 07:12:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:54,076 INFO L225 Difference]: With dead ends: 296 [2022-11-19 07:12:54,076 INFO L226 Difference]: Without dead ends: 254 [2022-11-19 07:12:54,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 140 SyntacticMatches, 24 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 3450 ImplicationChecksByTransitivity, 163.9s TimeCoverageRelationStatistics Valid=619, Invalid=7742, Unknown=15, NotChecked=180, Total=8556 [2022-11-19 07:12:54,078 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 219 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 61 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 47.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:54,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 1932 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1455 Invalid, 14 Unknown, 614 Unchecked, 47.5s Time] [2022-11-19 07:12:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-19 07:12:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 194. [2022-11-19 07:12:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 163 states have (on average 1.1288343558282208) internal successors, (184), 165 states have internal predecessors, (184), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 07:12:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 218 transitions. [2022-11-19 07:12:54,138 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 218 transitions. Word has length 67 [2022-11-19 07:12:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:54,138 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 218 transitions. [2022-11-19 07:12:54,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 2.3703703703703702) internal successors, (128), 53 states have internal predecessors, (128), 11 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (14), 11 states have call predecessors, (14), 9 states have call successors, (14) [2022-11-19 07:12:54,139 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 218 transitions. [2022-11-19 07:12:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:12:54,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:54,140 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:54,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:54,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:54,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:54,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:12:54,751 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:54,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1406489528, now seen corresponding path program 1 times [2022-11-19 07:12:54,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:54,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859950003] [2022-11-19 07:12:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:54,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:54,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:54,752 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:54,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-19 07:12:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:54,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:12:55,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:12:55,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:55,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:55,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859950003] [2022-11-19 07:12:55,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859950003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:55,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:55,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:12:55,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591229325] [2022-11-19 07:12:55,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:55,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:12:55,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:55,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:12:55,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:12:55,845 INFO L87 Difference]: Start difference. First operand 194 states and 218 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:12:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:57,017 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2022-11-19 07:12:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:12:57,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 69 [2022-11-19 07:12:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:57,020 INFO L225 Difference]: With dead ends: 256 [2022-11-19 07:12:57,021 INFO L226 Difference]: Without dead ends: 234 [2022-11-19 07:12:57,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:12:57,022 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 138 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:57,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 263 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 101 Invalid, 0 Unknown, 34 Unchecked, 0.5s Time] [2022-11-19 07:12:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-19 07:12:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 219. [2022-11-19 07:12:57,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 186 states have (on average 1.1236559139784945) internal successors, (209), 188 states have internal predecessors, (209), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 07:12:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 247 transitions. [2022-11-19 07:12:57,101 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 247 transitions. Word has length 69 [2022-11-19 07:12:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:57,101 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 247 transitions. [2022-11-19 07:12:57,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:12:57,102 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 247 transitions. [2022-11-19 07:12:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:12:57,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:57,103 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:12:57,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:57,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:57,315 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:12:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1656566613, now seen corresponding path program 2 times [2022-11-19 07:12:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:57,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809933279] [2022-11-19 07:12:57,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:12:57,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:57,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:57,317 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:57,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-19 07:12:57,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:12:57,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:12:57,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-19 07:12:57,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:57,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:12:58,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:12:58,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-19 07:12:59,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2022-11-19 07:13:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:02,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:02,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2022-11-19 07:13:03,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 61 [2022-11-19 07:13:03,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 72 [2022-11-19 07:13:47,635 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-11-19 07:13:47,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 37 [2022-11-19 07:13:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:13:48,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:50,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:50,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809933279] [2022-11-19 07:13:50,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809933279] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:50,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2057163550] [2022-11-19 07:13:50,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:13:50,323 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:13:50,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:13:50,324 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:13:50,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-19 07:13:51,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:13:51,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:51,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-19 07:13:51,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:52,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:13:58,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:58,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-19 07:13:59,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:59,794 INFO L321 Elim1Store]: treesize reduction 14, result has 44.0 percent of original size [2022-11-19 07:13:59,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2022-11-19 07:14:00,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:00,894 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:14:00,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 53 [2022-11-19 07:14:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:13,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:13,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:13,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:13,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:13,791 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:14:13,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 62 [2022-11-19 07:14:16,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:16,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:16,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:16,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:16,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:16,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:16,639 INFO L321 Elim1Store]: treesize reduction 22, result has 33.3 percent of original size [2022-11-19 07:14:16,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 79 [2022-11-19 07:14:19,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:19,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:19,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:19,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:19,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:19,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:19,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:19,098 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-19 07:14:19,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 89 [2022-11-19 07:14:42,779 INFO L321 Elim1Store]: treesize reduction 66, result has 25.8 percent of original size [2022-11-19 07:14:42,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 77 treesize of output 63 [2022-11-19 07:14:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:14:42,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:42,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2057163550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:42,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414678575] [2022-11-19 07:14:42,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:14:42,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:42,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:42,973 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:42,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1fbcfae-fa6b-40d8-ac3b-f87c9585550e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-19 07:14:43,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:14:43,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:14:43,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-19 07:14:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:43,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 07:14:43,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 07:14:43,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-19 07:14:45,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:45,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:45,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2022-11-19 07:14:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:59,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:59,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2022-11-19 07:15:01,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:01,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:01,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 61 [2022-11-19 07:15:03,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:03,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:03,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:03,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:03,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 72 [2022-11-19 07:15:44,726 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-11-19 07:15:44,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 37 [2022-11-19 07:15:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:15:44,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:44,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414678575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:15:44,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:15:44,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 31] total 65 [2022-11-19 07:15:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60808523] [2022-11-19 07:15:44,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:15:44,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-19 07:15:44,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:15:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-19 07:15:44,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=4369, Unknown=7, NotChecked=0, Total=4692 [2022-11-19 07:15:44,930 INFO L87 Difference]: Start difference. First operand 219 states and 247 transitions. Second operand has 65 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 11 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-19 07:16:44,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:46,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:48,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:51,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:53,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:55,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:57,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:59,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:01,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:03,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:05,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:07,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:09,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:11,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:13,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:15,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:17,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:19,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:21,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:23,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:25,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:28,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:31,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []