./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/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_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/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_a3ca0f14-9152-4fbb-90e7-356d01283429/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 f3174b0caf7483d7aa96d2ace1d661f4c70bbed9301f1108659fc7d611ebd9af --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:00:42,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:00:42,754 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 01:00:42,760 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:00:42,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:00:42,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:00:42,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:00:42,787 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:00:42,788 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:00:42,793 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:00:42,793 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:00:42,794 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:00:42,794 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:00:42,796 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:00:42,796 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:00:42,797 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:00:42,797 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:00:42,798 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:00:42,798 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:00:42,798 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:00:42,799 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:00:42,799 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:00:42,801 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:00:42,801 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:00:42,801 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:00:42,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:00:42,802 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:00:42,802 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:00:42,803 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:00:42,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:00:42,805 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:00:42,805 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:00:42,805 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:00:42,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:42,806 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:00:42,806 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:00:42,806 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:00:42,806 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:00:42,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:00:42,807 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:00:42,807 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:00:42,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:00:42,807 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_a3ca0f14-9152-4fbb-90e7-356d01283429/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3174b0caf7483d7aa96d2ace1d661f4c70bbed9301f1108659fc7d611ebd9af [2023-11-12 01:00:43,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:00:43,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:00:43,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:00:43,123 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:00:43,123 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:00:43,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i [2023-11-12 01:00:46,382 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:00:46,983 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:00:46,984 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i [2023-11-12 01:00:47,022 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/data/1af2a9bb6/d581d37d524541428abc0cbdfa9a39c3/FLAG63621d47a [2023-11-12 01:00:47,038 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/data/1af2a9bb6/d581d37d524541428abc0cbdfa9a39c3 [2023-11-12 01:00:47,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:00:47,043 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:00:47,045 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:47,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:00:47,051 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:00:47,052 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:47" (1/1) ... [2023-11-12 01:00:47,053 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ef3881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:47, skipping insertion in model container [2023-11-12 01:00:47,053 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:47" (1/1) ... [2023-11-12 01:00:47,204 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:00:47,479 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_a3ca0f14-9152-4fbb-90e7-356d01283429/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4493,4506] [2023-11-12 01:00:47,488 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_a3ca0f14-9152-4fbb-90e7-356d01283429/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4553,4566] [2023-11-12 01:00:48,545 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:48,575 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:48,577 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:48,584 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:48,585 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:48,608 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:48,609 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:48,611 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:48,612 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,077 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 01:00:49,079 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 01:00:49,080 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 01:00:49,082 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 01:00:49,083 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 01:00:49,084 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 01:00:49,085 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 01:00:49,086 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 01:00:49,087 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 01:00:49,088 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 01:00:49,493 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,495 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:49,608 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:00:49,635 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_a3ca0f14-9152-4fbb-90e7-356d01283429/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4493,4506] [2023-11-12 01:00:49,636 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_a3ca0f14-9152-4fbb-90e7-356d01283429/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4553,4566] [2023-11-12 01:00:49,712 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,714 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,714 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,715 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,716 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,740 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,742 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,744 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,746 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,801 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 01:00:49,802 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 01:00:49,803 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 01:00:49,811 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 01:00:49,814 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 01:00:49,815 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 01:00:49,815 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 01:00:49,818 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 01:00:49,819 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 01:00:49,820 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 01:00:49,937 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8556] [2023-11-12 01:00:49,939 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,941 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:49,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:50,257 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,262 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,262 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,263 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,263 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,263 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,263 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,264 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,264 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,264 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,264 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,277 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,277 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,278 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,278 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,278 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,278 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:50,284 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:00:50,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50 WrapperNode [2023-11-12 01:00:50,285 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:50,286 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:50,286 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:00:50,287 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:00:50,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,400 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,462 INFO L138 Inliner]: procedures = 680, calls = 2274, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 390 [2023-11-12 01:00:50,469 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:50,470 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:00:50,470 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:00:50,471 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:00:50,481 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,502 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,506 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,551 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,555 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,561 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,586 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:00:50,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:00:50,593 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:00:50,593 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:00:50,594 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (1/1) ... [2023-11-12 01:00:50,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:50,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:00:50,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:00:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2023-11-12 01:00:50,672 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2023-11-12 01:00:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-11-12 01:00:50,673 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-11-12 01:00:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-11-12 01:00:50,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-11-12 01:00:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 01:00:50,674 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 01:00:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:00:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 01:00:50,675 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 01:00:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:00:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:00:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:00:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:00:50,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:00:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 01:00:50,677 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 01:00:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 01:00:50,677 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 01:00:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 01:00:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 01:00:50,678 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 01:00:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 01:00:50,678 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 01:00:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:00:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:00:50,970 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:00:50,973 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:00:51,579 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:00:51,678 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:00:51,678 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 01:00:51,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:51 BoogieIcfgContainer [2023-11-12 01:00:51,682 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:00:51,684 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:00:51,685 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:00:51,688 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:00:51,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:00:47" (1/3) ... [2023-11-12 01:00:51,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24de8b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:51, skipping insertion in model container [2023-11-12 01:00:51,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:50" (2/3) ... [2023-11-12 01:00:51,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24de8b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:51, skipping insertion in model container [2023-11-12 01:00:51,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:51" (3/3) ... [2023-11-12 01:00:51,691 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_c_str_harness_negated.i [2023-11-12 01:00:51,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:00:51,711 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:00:51,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:00:51,769 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;@2210a052, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:00:51,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:00:51,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 50 states have (on average 1.26) internal successors, (63), 51 states have internal predecessors, (63), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 01:00:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 01:00:51,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:51,784 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 01:00:51,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:51,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:51,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1371401817, now seen corresponding path program 1 times [2023-11-12 01:00:51,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:51,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79187324] [2023-11-12 01:00:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:51,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:52,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:52,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79187324] [2023-11-12 01:00:52,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79187324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:52,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:52,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:00:52,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237098633] [2023-11-12 01:00:52,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:52,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:00:52,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:00:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:52,632 INFO L87 Difference]: Start difference. First operand has 87 states, 50 states have (on average 1.26) internal successors, (63), 51 states have internal predecessors, (63), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 01:00:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:52,788 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2023-11-12 01:00:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:00:52,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-11-12 01:00:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:52,802 INFO L225 Difference]: With dead ends: 130 [2023-11-12 01:00:52,803 INFO L226 Difference]: Without dead ends: 83 [2023-11-12 01:00:52,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:52,818 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 7 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:52,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 294 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:52,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-12 01:00:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-12 01:00:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-12 01:00:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2023-11-12 01:00:52,878 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 26 [2023-11-12 01:00:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:52,879 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2023-11-12 01:00:52,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 01:00:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2023-11-12 01:00:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 01:00:52,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:52,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:52,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:00:52,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:52,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash 469334089, now seen corresponding path program 1 times [2023-11-12 01:00:52,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:52,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229131159] [2023-11-12 01:00:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:52,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 01:00:53,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:53,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229131159] [2023-11-12 01:00:53,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229131159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:53,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:53,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:00:53,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645085284] [2023-11-12 01:00:53,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:53,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:00:53,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:00:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:00:53,450 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-12 01:00:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:53,640 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2023-11-12 01:00:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:00:53,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 45 [2023-11-12 01:00:53,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:53,646 INFO L225 Difference]: With dead ends: 111 [2023-11-12 01:00:53,647 INFO L226 Difference]: Without dead ends: 83 [2023-11-12 01:00:53,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:00:53,649 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 6 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:53,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 521 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-12 01:00:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-12 01:00:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 48 states have internal predecessors, (55), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-12 01:00:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2023-11-12 01:00:53,666 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 45 [2023-11-12 01:00:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:53,666 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2023-11-12 01:00:53,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-12 01:00:53,667 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2023-11-12 01:00:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 01:00:53,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:53,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:00:53,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:53,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash 159531263, now seen corresponding path program 1 times [2023-11-12 01:00:53,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:53,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003379349] [2023-11-12 01:00:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:53,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 01:00:54,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:54,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003379349] [2023-11-12 01:00:54,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003379349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:54,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:54,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:00:54,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741565893] [2023-11-12 01:00:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:54,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:00:54,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:54,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:00:54,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:54,032 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 01:00:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:54,166 INFO L93 Difference]: Finished difference Result 131 states and 167 transitions. [2023-11-12 01:00:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:00:54,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 46 [2023-11-12 01:00:54,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:54,172 INFO L225 Difference]: With dead ends: 131 [2023-11-12 01:00:54,172 INFO L226 Difference]: Without dead ends: 83 [2023-11-12 01:00:54,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:54,177 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:54,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 271 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-12 01:00:54,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-12 01:00:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.148936170212766) internal successors, (54), 48 states have internal predecessors, (54), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-12 01:00:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-11-12 01:00:54,195 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 46 [2023-11-12 01:00:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:54,196 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-11-12 01:00:54,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 01:00:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-11-12 01:00:54,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 01:00:54,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:54,199 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 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] [2023-11-12 01:00:54,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:00:54,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:54,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1062584429, now seen corresponding path program 1 times [2023-11-12 01:00:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:54,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947428728] [2023-11-12 01:00:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:54,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-12 01:00:54,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:54,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947428728] [2023-11-12 01:00:54,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947428728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:54,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209748765] [2023-11-12 01:00:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:54,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:54,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:54,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:54,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ca0f14-9152-4fbb-90e7-356d01283429/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:00:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:55,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 01:00:55,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 01:00:55,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-12 01:00:55,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209748765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:55,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519439931] [2023-11-12 01:00:55,671 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2023-11-12 01:00:55,671 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:55,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:55,681 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:55,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs