./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 0e0057cc 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_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/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_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh --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 0.2.4-dev-0e0057c [2023-12-02 12:42:07,496 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:42:07,577 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 12:42:07,583 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:42:07,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:42:07,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:42:07,607 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:42:07,608 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:42:07,608 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:42:07,609 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:42:07,609 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:42:07,610 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:42:07,611 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:42:07,611 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:42:07,612 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:42:07,612 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:42:07,613 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:42:07,613 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:42:07,614 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:42:07,614 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:42:07,615 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:42:07,616 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:42:07,617 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:42:07,617 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:42:07,618 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:42:07,618 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:42:07,619 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:42:07,619 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:42:07,620 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:42:07,620 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:42:07,620 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:42:07,621 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:42:07,621 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:42:07,621 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:42:07,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:42:07,622 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:42:07,622 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:42:07,622 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:42:07,623 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:42:07,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:42:07,623 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:42:07,623 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:42:07,624 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:42:07,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:42:07,624 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_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3174b0caf7483d7aa96d2ace1d661f4c70bbed9301f1108659fc7d611ebd9af [2023-12-02 12:42:07,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:42:07,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:42:07,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:42:07,854 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:42:07,855 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:42:07,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i [2023-12-02 12:42:10,616 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:42:11,046 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:42:11,047 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i [2023-12-02 12:42:11,085 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/data/14fbf7ef5/9e53c66b50c5447ca442e902f8d47910/FLAG3f95e4a8f [2023-12-02 12:42:11,097 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/data/14fbf7ef5/9e53c66b50c5447ca442e902f8d47910 [2023-12-02 12:42:11,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:42:11,101 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:42:11,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:42:11,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:42:11,106 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:42:11,107 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:42:11" (1/1) ... [2023-12-02 12:42:11,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3502a220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:11, skipping insertion in model container [2023-12-02 12:42:11,109 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:42:11" (1/1) ... [2023-12-02 12:42:11,238 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:42:11,464 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_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4493,4506] [2023-12-02 12:42:11,472 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_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4553,4566] [2023-12-02 12:42:12,499 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:12,500 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:12,501 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:12,502 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:12,503 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:12,522 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:12,523 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:12,525 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:12,526 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,019 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 12:42:13,020 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 12:42:13,021 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 12:42:13,022 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 12:42:13,024 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 12:42:13,025 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 12:42:13,026 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 12:42:13,026 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 12:42:13,027 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 12:42:13,027 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 12:42:13,283 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,284 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:42:13,346 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:42:13,362 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_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4493,4506] [2023-12-02 12:42:13,363 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_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4553,4566] [2023-12-02 12:42:13,402 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,403 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,404 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,404 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,405 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,415 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,416 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,418 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,418 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,455 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 12:42:13,456 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 12:42:13,457 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 12:42:13,458 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 12:42:13,459 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 12:42:13,459 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 12:42:13,460 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 12:42:13,460 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 12:42:13,461 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 12:42:13,461 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 12:42:13,582 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8556] [2023-12-02 12:42:13,584 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,584 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 12:42:13,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:42:13,844 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,844 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,844 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,844 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,845 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,845 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,845 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,845 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,845 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,845 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,845 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,846 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,846 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,846 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,846 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,846 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,846 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:42:13,852 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:42:13,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13 WrapperNode [2023-12-02 12:42:13,853 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:42:13,854 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:42:13,854 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:42:13,854 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:42:13,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:13,940 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:14,001 INFO L138 Inliner]: procedures = 680, calls = 2274, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 392 [2023-12-02 12:42:14,002 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:42:14,002 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:42:14,003 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:42:14,003 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:42:14,014 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:14,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:14,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:14,022 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:14,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:14,052 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:14,057 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:14,061 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:14,068 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:42:14,069 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:42:14,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:42:14,070 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:42:14,070 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (1/1) ... [2023-12-02 12:42:14,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:42:14,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:14,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:42:14,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:42:14,141 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2023-12-02 12:42:14,141 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2023-12-02 12:42:14,141 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-12-02 12:42:14,141 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-12-02 12:42:14,141 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-12-02 12:42:14,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-12-02 12:42:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 12:42:14,142 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 12:42:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 12:42:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 12:42:14,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 12:42:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:42:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:42:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 12:42:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:42:14,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:42:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 12:42:14,143 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 12:42:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 12:42:14,143 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 12:42:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 12:42:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 12:42:14,143 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 12:42:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 12:42:14,143 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 12:42:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 12:42:14,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:42:14,358 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:42:14,361 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:42:14,756 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:42:14,855 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:42:14,856 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:42:14,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:42:14 BoogieIcfgContainer [2023-12-02 12:42:14,857 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:42:14,860 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:42:14,860 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:42:14,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:42:14,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:42:11" (1/3) ... [2023-12-02 12:42:14,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af9e508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:42:14, skipping insertion in model container [2023-12-02 12:42:14,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:13" (2/3) ... [2023-12-02 12:42:14,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af9e508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:42:14, skipping insertion in model container [2023-12-02 12:42:14,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:42:14" (3/3) ... [2023-12-02 12:42:14,867 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_c_str_harness_negated.i [2023-12-02 12:42:14,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:42:14,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:42:14,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:42:14,947 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;@63156349, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:42:14,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:42:14,952 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) [2023-12-02 12:42:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 12:42:14,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:14,963 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] [2023-12-02 12:42:14,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:14,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:14,970 INFO L85 PathProgramCache]: Analyzing trace with hash -914489389, now seen corresponding path program 1 times [2023-12-02 12:42:14,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:14,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846516549] [2023-12-02 12:42:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:42:15,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846516549] [2023-12-02 12:42:15,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846516549] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:15,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:15,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:42:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77141206] [2023-12-02 12:42:15,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:15,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:42:15,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:15,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:42:15,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:42:15,559 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) [2023-12-02 12:42:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:15,694 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2023-12-02 12:42:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:42:15,696 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 [2023-12-02 12:42:15,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:15,706 INFO L225 Difference]: With dead ends: 130 [2023-12-02 12:42:15,706 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 12:42:15,710 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 [2023-12-02 12:42:15,714 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 [2023-12-02 12:42:15,715 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] [2023-12-02 12:42:15,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 12:42:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 12:42:15,760 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) [2023-12-02 12:42:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2023-12-02 12:42:15,765 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 26 [2023-12-02 12:42:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:15,766 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2023-12-02 12:42:15,766 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) [2023-12-02 12:42:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2023-12-02 12:42:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 12:42:15,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:15,770 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] [2023-12-02 12:42:15,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:42:15,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:15,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:15,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1796768763, now seen corresponding path program 1 times [2023-12-02 12:42:15,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:15,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616614642] [2023-12-02 12:42:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:15,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:42:16,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:16,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616614642] [2023-12-02 12:42:16,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616614642] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:16,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:16,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:42:16,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746716767] [2023-12-02 12:42:16,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:16,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:42:16,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:16,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:42:16,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:42:16,227 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) [2023-12-02 12:42:16,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:16,352 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2023-12-02 12:42:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:42:16,353 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 [2023-12-02 12:42:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:16,355 INFO L225 Difference]: With dead ends: 111 [2023-12-02 12:42:16,355 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 12:42:16,356 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 [2023-12-02 12:42:16,357 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 [2023-12-02 12:42:16,357 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] [2023-12-02 12:42:16,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 12:42:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 12:42:16,369 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) [2023-12-02 12:42:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2023-12-02 12:42:16,371 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 45 [2023-12-02 12:42:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:16,372 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2023-12-02 12:42:16,372 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) [2023-12-02 12:42:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2023-12-02 12:42:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 12:42:16,374 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:16,375 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] [2023-12-02 12:42:16,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:42:16,375 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:16,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1370180413, now seen corresponding path program 1 times [2023-12-02 12:42:16,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:16,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994954545] [2023-12-02 12:42:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:16,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:42:16,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:16,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994954545] [2023-12-02 12:42:16,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994954545] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:16,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:16,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:42:16,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333233487] [2023-12-02 12:42:16,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:16,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:42:16,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:42:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:42:16,657 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) [2023-12-02 12:42:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:16,741 INFO L93 Difference]: Finished difference Result 131 states and 167 transitions. [2023-12-02 12:42:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:42:16,742 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 [2023-12-02 12:42:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:16,743 INFO L225 Difference]: With dead ends: 131 [2023-12-02 12:42:16,744 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 12:42:16,745 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 [2023-12-02 12:42:16,746 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 [2023-12-02 12:42:16,746 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] [2023-12-02 12:42:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 12:42:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 12:42:16,756 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) [2023-12-02 12:42:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-12-02 12:42:16,758 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 46 [2023-12-02 12:42:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:16,758 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-12-02 12:42:16,758 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) [2023-12-02 12:42:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-12-02 12:42:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 12:42:16,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:16,761 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] [2023-12-02 12:42:16,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:42:16,762 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:16,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1750816421, now seen corresponding path program 1 times [2023-12-02 12:42:16,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:16,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645654065] [2023-12-02 12:42:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:16,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 12:42:17,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:17,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645654065] [2023-12-02 12:42:17,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645654065] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:17,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710211977] [2023-12-02 12:42:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:17,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:17,344 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:17,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:42:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:17,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 12:42:17,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 12:42:17,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 12:42:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710211977] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:42:17,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815100753] [2023-12-02 12:42:18,019 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2023-12-02 12:42:18,019 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:42:18,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:42:18,031 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:42:18,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:43:56,569 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_string_is_allocated_bounded_length with input of size 863 for LOIs [2023-12-02 12:44:44,813 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_bool with input of size 15 for LOIs [2023-12-02 12:44:44,815 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 15 for LOIs [2023-12-02 12:44:44,816 INFO L197 IcfgInterpreter]: Interpreting procedure bounded_malloc with input of size 15 for LOIs [2023-12-02 12:44:44,870 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-12-02 12:44:44,871 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:44:52,579 WARN L293 SmtUtils]: Spent 7.41s on a formula simplification that was a NOOP. DAG size: 843 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:45:00,315 WARN L293 SmtUtils]: Spent 7.38s on a formula simplification that was a NOOP. DAG size: 847 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:45:08,279 WARN L293 SmtUtils]: Spent 7.60s on a formula simplification that was a NOOP. DAG size: 863 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:45:16,190 WARN L293 SmtUtils]: Spent 7.54s on a formula simplification that was a NOOP. DAG size: 865 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:45:40,090 WARN L293 SmtUtils]: Spent 23.23s on a formula simplification. DAG size of input: 895 DAG size of output: 880 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:46:04,094 WARN L293 SmtUtils]: Spent 23.37s on a formula simplification. DAG size of input: 899 DAG size of output: 884 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:46:32,961 WARN L293 SmtUtils]: Spent 23.78s on a formula simplification that was a NOOP. DAG size: 1546 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:47:00,159 WARN L293 SmtUtils]: Spent 23.96s on a formula simplification that was a NOOP. DAG size: 1550 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:47:27,142 WARN L293 SmtUtils]: Spent 23.46s on a formula simplification that was a NOOP. DAG size: 1547 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:47:57,409 WARN L293 SmtUtils]: Spent 25.42s on a formula simplification that was a NOOP. DAG size: 1555 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:48:17,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [815100753] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:48:17,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:48:17,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [11, 10, 10] total 49 [2023-12-02 12:48:17,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390440582] [2023-12-02 12:48:17,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:48:17,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 12:48:17,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:17,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 12:48:17,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2138, Unknown=27, NotChecked=0, Total=2352 [2023-12-02 12:48:17,192 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 32 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2023-12-02 12:48:26,271 WARN L293 SmtUtils]: Spent 7.14s on a formula simplification that was a NOOP. DAG size: 849 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:48:34,058 WARN L293 SmtUtils]: Spent 7.07s on a formula simplification that was a NOOP. DAG size: 846 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:48:42,123 WARN L293 SmtUtils]: Spent 7.54s on a formula simplification that was a NOOP. DAG size: 861 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:48:50,004 WARN L293 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 879 DAG size of output: 877 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:48:57,436 WARN L293 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 849 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:49:04,752 WARN L293 SmtUtils]: Spent 7.00s on a formula simplification that was a NOOP. DAG size: 849 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:49:12,870 WARN L293 SmtUtils]: Spent 7.54s on a formula simplification that was a NOOP. DAG size: 856 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:50:10,395 WARN L293 SmtUtils]: Spent 32.19s on a formula simplification that was a NOOP. DAG size: 1611 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:50:54,537 WARN L293 SmtUtils]: Spent 37.28s on a formula simplification that was a NOOP. DAG size: 1627 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:51:31,960 WARN L293 SmtUtils]: Spent 26.79s on a formula simplification that was a NOOP. DAG size: 1558 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:52:07,027 WARN L293 SmtUtils]: Spent 28.67s on a formula simplification that was a NOOP. DAG size: 1577 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:52:43,732 WARN L293 SmtUtils]: Spent 29.57s on a formula simplification. DAG size of input: 1572 DAG size of output: 1572 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:53:29,725 WARN L293 SmtUtils]: Spent 30.16s on a formula simplification. DAG size of input: 1571 DAG size of output: 1571 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:54:05,555 WARN L293 SmtUtils]: Spent 29.16s on a formula simplification. DAG size of input: 1573 DAG size of output: 1573 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:54:42,553 WARN L293 SmtUtils]: Spent 29.94s on a formula simplification. DAG size of input: 1575 DAG size of output: 1575 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:55:17,414 WARN L293 SmtUtils]: Spent 27.08s on a formula simplification. DAG size of input: 1561 DAG size of output: 1561 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:56:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:05,272 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2023-12-02 12:56:05,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 12:56:05,273 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) Word has length 71 [2023-12-02 12:56:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:05,276 INFO L225 Difference]: With dead ends: 177 [2023-12-02 12:56:05,276 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 12:56:05,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 579.9s TimeCoverageRelationStatistics Valid=315, Invalid=3801, Unknown=44, NotChecked=0, Total=4160 [2023-12-02 12:56:05,279 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 129 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 29 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:05,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 474 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1561 Invalid, 26 Unknown, 0 Unchecked, 100.4s Time] [2023-12-02 12:56:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 12:56:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 108. [2023-12-02 12:56:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 32 states have call successors, (32), 13 states have call predecessors, (32), 14 states have return successors, (32), 32 states have call predecessors, (32), 31 states have call successors, (32) [2023-12-02 12:56:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2023-12-02 12:56:05,402 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 71 [2023-12-02 12:56:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:05,403 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2023-12-02 12:56:05,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2023-12-02 12:56:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2023-12-02 12:56:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 12:56:05,405 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:05,405 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, 1, 1, 1, 1] [2023-12-02 12:56:05,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:56:05,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:05,606 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:05,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:05,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1303599417, now seen corresponding path program 1 times [2023-12-02 12:56:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:05,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568544966] [2023-12-02 12:56:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:05,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 12:56:06,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:06,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568544966] [2023-12-02 12:56:06,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568544966] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:06,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056412286] [2023-12-02 12:56:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:06,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:06,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:06,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:06,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b8e42d3-dd1b-49c5-aa17-cd918c09b03d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:56:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:06,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 12:56:06,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 12:56:06,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 12:56:06,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056412286] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:06,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168431424] [2023-12-02 12:56:06,621 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-12-02 12:56:06,621 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:06,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:06,622 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:06,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs