./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --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 43b2ef256b4d1a93a084f86d3d9a0522c1b29c695f7bf9f8438f4c917cc80da0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:59:07,602 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:59:07,721 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:59:07,733 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:59:07,734 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:59:07,772 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:59:07,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:59:07,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:59:07,775 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:59:07,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:59:07,781 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:59:07,782 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:59:07,782 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:59:07,784 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:59:07,785 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:59:07,785 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:59:07,786 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:59:07,786 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:59:07,787 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:59:07,787 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:59:07,788 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:59:07,788 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:59:07,790 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:59:07,790 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:59:07,791 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:59:07,791 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:59:07,792 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:59:07,792 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:59:07,792 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:59:07,793 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:59:07,794 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:59:07,795 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:59:07,795 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:59:07,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:07,796 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:59:07,796 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:59:07,797 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:59:07,797 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:59:07,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:59:07,798 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:59:07,798 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:59:07,798 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:59:07,799 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43b2ef256b4d1a93a084f86d3d9a0522c1b29c695f7bf9f8438f4c917cc80da0 [2023-11-12 00:59:08,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:59:08,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:59:08,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:59:08,103 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:59:08,104 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:59:08,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i [2023-11-12 00:59:11,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:59:11,750 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:59:11,751 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i [2023-11-12 00:59:11,793 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/data/cbf498eb7/99a612ed81564ff3a3308f08209b13c8/FLAG1d0dd4bf4 [2023-11-12 00:59:11,811 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/data/cbf498eb7/99a612ed81564ff3a3308f08209b13c8 [2023-11-12 00:59:11,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:59:11,818 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:59:11,821 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:11,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:59:11,827 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:59:11,828 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:11" (1/1) ... [2023-11-12 00:59:11,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3f068d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:11, skipping insertion in model container [2023-11-12 00:59:11,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:11" (1/1) ... [2023-11-12 00:59:11,961 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:59:12,210 WARN L240 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_f66bf417-7697-4b6c-842d-f9f23d7fabd0/sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i[4493,4506] [2023-11-12 00:59:12,262 WARN L240 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_f66bf417-7697-4b6c-842d-f9f23d7fabd0/sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i[4553,4566] [2023-11-12 00:59:13,365 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,365 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,366 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,367 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,368 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,380 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,381 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,383 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,384 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,386 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,387 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,388 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,389 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,749 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:59:13,755 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:59:13,756 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:59:13,758 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:59:13,764 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:59:13,765 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:59:13,766 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:59:13,776 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:59:13,777 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:59:13,778 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:59:13,935 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:13,942 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:14,067 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:59:14,092 WARN L240 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_f66bf417-7697-4b6c-842d-f9f23d7fabd0/sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i[4493,4506] [2023-11-12 00:59:14,093 WARN L240 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_f66bf417-7697-4b6c-842d-f9f23d7fabd0/sv-benchmarks/c/aws-c-common/aws_array_list_back_harness.i[4553,4566] [2023-11-12 00:59:14,188 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,189 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,192 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,192 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,193 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,200 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,206 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,208 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,208 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,210 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,212 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,212 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,213 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,272 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:59:14,273 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:59:14,274 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:59:14,277 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:59:14,278 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:59:14,280 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:59:14,281 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:59:14,281 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:59:14,282 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:59:14,282 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:59:14,367 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,373 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:14,384 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7769-7780] [2023-11-12 00:59:14,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:14,615 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,615 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,615 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,615 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,615 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,616 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,616 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,616 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,616 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,616 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,616 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,617 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,617 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,617 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,617 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:14,626 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:59:14,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14 WrapperNode [2023-11-12 00:59:14,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:14,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:14,628 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:59:14,628 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:59:14,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,737 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,810 INFO L138 Inliner]: procedures = 690, calls = 1683, calls flagged for inlining = 53, calls inlined = 9, statements flattened = 659 [2023-11-12 00:59:14,811 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:14,811 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:59:14,812 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:59:14,812 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:59:14,822 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,852 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,855 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,922 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,942 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,957 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:59:14,974 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:59:14,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:59:14,975 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:59:14,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (1/1) ... [2023-11-12 00:59:14,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:15,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:59:15,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:59:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:59:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-12 00:59:15,077 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-12 00:59:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-12 00:59:15,077 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-12 00:59:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:59:15,078 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:59:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:59:15,079 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:59:15,079 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:59:15,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:59:15,079 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:59:15,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:59:15,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:59:15,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:59:15,080 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-12 00:59:15,080 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-12 00:59:15,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:59:15,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:59:15,080 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:59:15,081 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:59:15,081 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-12 00:59:15,082 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-12 00:59:15,082 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 00:59:15,083 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 00:59:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-12 00:59:15,083 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-12 00:59:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-12 00:59:15,084 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-12 00:59:15,084 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:59:15,084 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:59:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-12 00:59:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-12 00:59:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:59:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:59:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:59:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 00:59:15,086 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 00:59:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 00:59:15,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 00:59:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:59:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-12 00:59:15,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-12 00:59:15,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:59:15,472 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:59:15,477 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:16,704 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:16,927 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:16,927 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:59:16,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:16 BoogieIcfgContainer [2023-11-12 00:59:16,930 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:16,934 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:16,935 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:16,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:16,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:11" (1/3) ... [2023-11-12 00:59:16,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8831b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:16, skipping insertion in model container [2023-11-12 00:59:16,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:14" (2/3) ... [2023-11-12 00:59:16,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8831b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:16, skipping insertion in model container [2023-11-12 00:59:16,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:16" (3/3) ... [2023-11-12 00:59:16,944 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_list_back_harness.i [2023-11-12 00:59:16,966 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:16,966 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:59:17,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:17,052 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=LoopHeads, 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;@2c9f71d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:17,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:59:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 79 states have internal predecessors, (92), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-11-12 00:59:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-12 00:59:17,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:17,077 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:17,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:17,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:17,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1413423871, now seen corresponding path program 1 times [2023-11-12 00:59:17,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:17,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124806610] [2023-11-12 00:59:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:17,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-12 00:59:18,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:18,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124806610] [2023-11-12 00:59:18,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124806610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:18,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959898370] [2023-11-12 00:59:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:18,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:18,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:18,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:18,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 2205 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:59:18,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-12 00:59:19,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:19,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959898370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:19,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:19,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-12 00:59:19,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538102008] [2023-11-12 00:59:19,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:19,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:19,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:19,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:19,175 INFO L87 Difference]: Start difference. First operand has 149 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 79 states have internal predecessors, (92), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-12 00:59:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:19,772 INFO L93 Difference]: Finished difference Result 275 states and 387 transitions. [2023-11-12 00:59:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 95 [2023-11-12 00:59:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:19,787 INFO L225 Difference]: With dead ends: 275 [2023-11-12 00:59:19,787 INFO L226 Difference]: Without dead ends: 145 [2023-11-12 00:59:19,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:19,805 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 39 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:19,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 567 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:59:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-12 00:59:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-12 00:59:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 77 states have internal predecessors, (85), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (56), 51 states have call predecessors, (56), 51 states have call successors, (56) [2023-11-12 00:59:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 194 transitions. [2023-11-12 00:59:19,895 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 194 transitions. Word has length 95 [2023-11-12 00:59:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:19,896 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 194 transitions. [2023-11-12 00:59:19,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-12 00:59:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 194 transitions. [2023-11-12 00:59:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-12 00:59:19,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:19,906 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:19,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:59:20,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:20,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:20,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash -365698913, now seen corresponding path program 1 times [2023-11-12 00:59:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:20,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449362972] [2023-11-12 00:59:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:20,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:20,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:20,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562397917] [2023-11-12 00:59:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:20,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:20,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:20,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:20,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:20,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:59:20,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-12 00:59:21,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:21,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:21,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449362972] [2023-11-12 00:59:21,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:21,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562397917] [2023-11-12 00:59:21,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562397917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:21,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:21,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:21,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056714314] [2023-11-12 00:59:21,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:21,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:21,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:21,043 INFO L87 Difference]: Start difference. First operand 145 states and 194 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:59:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:21,493 INFO L93 Difference]: Finished difference Result 236 states and 315 transitions. [2023-11-12 00:59:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 113 [2023-11-12 00:59:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:21,497 INFO L225 Difference]: With dead ends: 236 [2023-11-12 00:59:21,497 INFO L226 Difference]: Without dead ends: 145 [2023-11-12 00:59:21,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:21,499 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 39 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:21,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 668 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:59:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-12 00:59:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-12 00:59:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 77 states have internal predecessors, (85), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (53), 51 states have call predecessors, (53), 51 states have call successors, (53) [2023-11-12 00:59:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2023-11-12 00:59:21,528 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 113 [2023-11-12 00:59:21,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:21,531 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2023-11-12 00:59:21,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:59:21,532 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2023-11-12 00:59:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-12 00:59:21,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:21,540 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:21,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:21,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:59:21,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:21,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash -446029571, now seen corresponding path program 2 times [2023-11-12 00:59:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282850651] [2023-11-12 00:59:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:21,902 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:21,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102306840] [2023-11-12 00:59:21,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:59:21,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:21,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:21,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:21,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:59:22,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:59:22,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:59:22,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:59:22,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-12 00:59:22,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:22,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:22,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282850651] [2023-11-12 00:59:22,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:22,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102306840] [2023-11-12 00:59:22,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102306840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:22,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:22,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:22,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279736828] [2023-11-12 00:59:22,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:22,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:22,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:22,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:22,563 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand has 5 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-12 00:59:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:23,089 INFO L93 Difference]: Finished difference Result 232 states and 306 transitions. [2023-11-12 00:59:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:23,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 122 [2023-11-12 00:59:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:23,093 INFO L225 Difference]: With dead ends: 232 [2023-11-12 00:59:23,093 INFO L226 Difference]: Without dead ends: 145 [2023-11-12 00:59:23,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:23,095 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 0 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:23,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 595 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:59:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-12 00:59:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-12 00:59:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 77 states have internal predecessors, (85), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2023-11-12 00:59:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 190 transitions. [2023-11-12 00:59:23,119 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 190 transitions. Word has length 122 [2023-11-12 00:59:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:23,122 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 190 transitions. [2023-11-12 00:59:23,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 14.333333333333334) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-12 00:59:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 190 transitions. [2023-11-12 00:59:23,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-12 00:59:23,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:23,128 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:23,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:23,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 00:59:23,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:23,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:23,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1927146155, now seen corresponding path program 3 times [2023-11-12 00:59:23,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:23,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559034432] [2023-11-12 00:59:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:23,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:23,476 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:23,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403761603] [2023-11-12 00:59:23,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:59:23,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:23,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:23,478 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:23,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:59:24,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:59:24,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:59:24,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 2733 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:59:24,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-12 00:59:24,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:24,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:24,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559034432] [2023-11-12 00:59:24,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:24,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403761603] [2023-11-12 00:59:24,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403761603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:24,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:24,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:59:24,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875102608] [2023-11-12 00:59:24,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:24,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:59:24,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:59:24,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:24,335 INFO L87 Difference]: Start difference. First operand 145 states and 190 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:59:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:25,287 INFO L93 Difference]: Finished difference Result 231 states and 302 transitions. [2023-11-12 00:59:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:59:25,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 131 [2023-11-12 00:59:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:25,291 INFO L225 Difference]: With dead ends: 231 [2023-11-12 00:59:25,291 INFO L226 Difference]: Without dead ends: 143 [2023-11-12 00:59:25,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:59:25,293 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 42 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:25,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 941 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:59:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-12 00:59:25,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-11-12 00:59:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 75 states have internal predecessors, (83), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-12 00:59:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2023-11-12 00:59:25,309 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 131 [2023-11-12 00:59:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:25,310 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2023-11-12 00:59:25,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:59:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2023-11-12 00:59:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-12 00:59:25,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:25,313 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:25,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:25,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-12 00:59:25,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:25,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:25,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1403130913, now seen corresponding path program 1 times [2023-11-12 00:59:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:25,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492975406] [2023-11-12 00:59:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:25,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:25,652 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:25,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20252376] [2023-11-12 00:59:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:25,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:25,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:25,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:25,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66bf417-7697-4b6c-842d-f9f23d7fabd0/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:59:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:26,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-12 00:59:26,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-12 00:59:26,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-11-12 00:59:27,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:27,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492975406] [2023-11-12 00:59:27,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:27,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20252376] [2023-11-12 00:59:27,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20252376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:27,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [497995822] [2023-11-12 00:59:27,197 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2023-11-12 00:59:27,197 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:27,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:27,206 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:27,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs