./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.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_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/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_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/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_60319afa-baa9-4bc7-8044-801f368baacc/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 b64b813c3d856efe8cd859d380d09d4b682c371a0a165a5a5fe0d11dc206dad7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:46:59,184 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:46:59,246 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 16:46:59,250 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:46:59,251 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:46:59,272 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:46:59,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:46:59,273 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:46:59,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:46:59,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:46:59,275 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:46:59,276 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:46:59,276 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:46:59,277 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:46:59,277 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:46:59,292 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:46:59,293 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:46:59,293 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:46:59,294 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:46:59,294 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:46:59,295 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:46:59,295 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:46:59,296 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:46:59,296 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:46:59,297 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:46:59,297 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:46:59,298 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:46:59,298 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:46:59,298 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:46:59,298 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:46:59,299 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:46:59,299 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:46:59,300 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:46:59,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:46:59,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:46:59,300 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:46:59,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:46:59,301 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:46:59,301 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:46:59,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:46:59,301 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:46:59,301 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:46:59,302 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:46:59,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:46:59,302 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_60319afa-baa9-4bc7-8044-801f368baacc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b64b813c3d856efe8cd859d380d09d4b682c371a0a165a5a5fe0d11dc206dad7 [2023-12-02 16:46:59,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:46:59,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:46:59,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:46:59,564 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:46:59,564 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:46:59,566 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i [2023-12-02 16:47:02,221 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:47:02,630 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:47:02,630 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i [2023-12-02 16:47:02,662 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/data/13e863a86/638505d91ba74b239337519ee7abffbf/FLAG2282582e3 [2023-12-02 16:47:02,676 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/data/13e863a86/638505d91ba74b239337519ee7abffbf [2023-12-02 16:47:02,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:47:02,680 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:47:02,681 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:47:02,681 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:47:02,686 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:47:02,687 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:47:02" (1/1) ... [2023-12-02 16:47:02,688 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e1e2014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:02, skipping insertion in model container [2023-12-02 16:47:02,688 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:47:02" (1/1) ... [2023-12-02 16:47:02,808 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:47:03,064 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_60319afa-baa9-4bc7-8044-801f368baacc/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4493,4506] [2023-12-02 16:47:03,073 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_60319afa-baa9-4bc7-8044-801f368baacc/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4553,4566] [2023-12-02 16:47:03,897 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:03,898 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:03,899 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:03,900 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:03,901 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:03,916 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:03,917 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:03,919 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:03,919 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,362 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 16:47:04,363 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 16:47:04,364 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 16:47:04,365 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 16:47:04,367 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 16:47:04,367 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 16:47:04,368 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 16:47:04,369 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 16:47:04,370 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 16:47:04,370 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 16:47:04,656 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,657 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:47:04,720 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:47:04,744 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_60319afa-baa9-4bc7-8044-801f368baacc/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4493,4506] [2023-12-02 16:47:04,745 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_60319afa-baa9-4bc7-8044-801f368baacc/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness.i[4553,4566] [2023-12-02 16:47:04,783 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,783 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,784 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,784 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,785 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,795 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,795 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,796 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,797 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,823 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 16:47:04,824 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 16:47:04,825 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 16:47:04,826 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 16:47:04,827 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 16:47:04,827 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 16:47:04,828 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 16:47:04,828 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 16:47:04,829 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 16:47:04,829 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 16:47:04,896 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8588] [2023-12-02 16:47:04,897 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,898 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:47:04,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:47:05,137 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,137 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,137 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,137 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,137 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,138 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,138 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,138 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,138 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,138 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,138 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,138 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,138 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,139 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,139 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,139 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,139 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:47:05,144 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:47:05,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05 WrapperNode [2023-12-02 16:47:05,145 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:47:05,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:47:05,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:47:05,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:47:05,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,224 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,280 INFO L138 Inliner]: procedures = 680, calls = 2274, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 392 [2023-12-02 16:47:05,281 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:47:05,282 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:47:05,282 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:47:05,282 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:47:05,289 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,295 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,296 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,320 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,324 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,329 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,333 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,341 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:47:05,342 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:47:05,342 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:47:05,342 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:47:05,343 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (1/1) ... [2023-12-02 16:47:05,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:47:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:47:05,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:47:05,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:47:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2023-12-02 16:47:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2023-12-02 16:47:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-12-02 16:47:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-12-02 16:47:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-12-02 16:47:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-12-02 16:47:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 16:47:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 16:47:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 16:47:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:47:05,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:47:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:47:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:47:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 16:47:05,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:47:05,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:47:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 16:47:05,406 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 16:47:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 16:47:05,406 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 16:47:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 16:47:05,406 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 16:47:05,407 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 16:47:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 16:47:05,407 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 16:47:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 16:47:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:47:05,612 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:47:05,614 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:47:06,027 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:47:06,135 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:47:06,135 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:47:06,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:47:06 BoogieIcfgContainer [2023-12-02 16:47:06,137 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:47:06,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:47:06,140 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:47:06,143 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:47:06,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:47:02" (1/3) ... [2023-12-02 16:47:06,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abbcedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:47:06, skipping insertion in model container [2023-12-02 16:47:06,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:47:05" (2/3) ... [2023-12-02 16:47:06,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abbcedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:47:06, skipping insertion in model container [2023-12-02 16:47:06,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:47:06" (3/3) ... [2023-12-02 16:47:06,146 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_c_str_harness.i [2023-12-02 16:47:06,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:47:06,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:47:06,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:47:06,211 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;@5e88e39d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:47:06,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:47:06,216 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 16:47:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:47:06,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:06,226 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 16:47:06,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:06,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:06,233 INFO L85 PathProgramCache]: Analyzing trace with hash 108865387, now seen corresponding path program 1 times [2023-12-02 16:47:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:06,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503093780] [2023-12-02 16:47:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:06,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:06,814 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 16:47:06,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:06,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503093780] [2023-12-02 16:47:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503093780] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:06,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:06,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:47:06,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934651448] [2023-12-02 16:47:06,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:06,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:47:06,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:06,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:47:06,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:47:06,850 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 16:47:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:06,958 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2023-12-02 16:47:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:47:06,960 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 16:47:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:06,967 INFO L225 Difference]: With dead ends: 130 [2023-12-02 16:47:06,967 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 16:47:06,970 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 16:47:06,973 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 16:47:06,974 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 16:47:06,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 16:47:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 16:47:07,010 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 16:47:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2023-12-02 16:47:07,014 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 26 [2023-12-02 16:47:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:07,015 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2023-12-02 16:47:07,016 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 16:47:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2023-12-02 16:47:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 16:47:07,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:07,019 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 16:47:07,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:47:07,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:07,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:07,021 INFO L85 PathProgramCache]: Analyzing trace with hash -632253318, now seen corresponding path program 1 times [2023-12-02 16:47:07,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:07,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056823934] [2023-12-02 16:47:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:07,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:07,323 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 16:47:07,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056823934] [2023-12-02 16:47:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056823934] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:07,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:07,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:47:07,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047376560] [2023-12-02 16:47:07,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:07,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:47:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:47:07,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:47:07,345 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 16:47:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:07,464 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2023-12-02 16:47:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:47:07,465 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 16:47:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:07,467 INFO L225 Difference]: With dead ends: 111 [2023-12-02 16:47:07,467 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 16:47:07,468 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 16:47:07,469 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 16:47:07,470 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 16:47:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 16:47:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 16:47:07,482 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 16:47:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2023-12-02 16:47:07,484 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 45 [2023-12-02 16:47:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:07,485 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2023-12-02 16:47:07,485 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 16:47:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2023-12-02 16:47:07,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 16:47:07,487 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:07,487 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 16:47:07,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:47:07,488 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:07,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash 370654660, now seen corresponding path program 1 times [2023-12-02 16:47:07,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:07,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048507098] [2023-12-02 16:47:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:07,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:07,712 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 16:47:07,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:07,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048507098] [2023-12-02 16:47:07,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048507098] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:47:07,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:47:07,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:47:07,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509542421] [2023-12-02 16:47:07,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:47:07,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:47:07,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:47:07,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:47:07,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:47:07,715 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 16:47:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:47:07,799 INFO L93 Difference]: Finished difference Result 131 states and 167 transitions. [2023-12-02 16:47:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:47:07,800 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 16:47:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:47:07,801 INFO L225 Difference]: With dead ends: 131 [2023-12-02 16:47:07,802 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 16:47:07,803 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 16:47:07,804 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 16:47:07,804 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 16:47:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 16:47:07,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 16:47:07,814 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 16:47:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-12-02 16:47:07,816 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 46 [2023-12-02 16:47:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:47:07,816 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-12-02 16:47:07,816 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 16:47:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-12-02 16:47:07,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 16:47:07,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:47:07,819 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 16:47:07,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:47:07,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:47:07,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:47:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash 630601622, now seen corresponding path program 1 times [2023-12-02 16:47:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:47:07,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019056653] [2023-12-02 16:47:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:07,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:47:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:08,417 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 16:47:08,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:47:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019056653] [2023-12-02 16:47:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019056653] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:47:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680265724] [2023-12-02 16:47:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:47:08,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:47:08,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:47:08,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:47:08,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:47:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:47:08,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 16:47:08,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:47:08,956 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 16:47:08,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:47:09,085 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 16:47:09,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680265724] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:47:09,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [960787067] [2023-12-02 16:47:09,108 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2023-12-02 16:47:09,108 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:47:09,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:47:09,118 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:47:09,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:48:47,185 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_string_is_allocated_bounded_length with input of size 863 for LOIs [2023-12-02 16:49:34,543 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_bool with input of size 15 for LOIs [2023-12-02 16:49:34,544 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 15 for LOIs [2023-12-02 16:49:34,546 INFO L197 IcfgInterpreter]: Interpreting procedure bounded_malloc with input of size 15 for LOIs [2023-12-02 16:49:34,593 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2023-12-02 16:49:34,594 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:49:42,012 WARN L293 SmtUtils]: Spent 7.16s 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 16:49:49,075 WARN L293 SmtUtils]: Spent 6.75s 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 16:49:56,989 WARN L293 SmtUtils]: Spent 7.52s 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 16:50:04,724 WARN L293 SmtUtils]: Spent 7.33s 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 16:50:28,083 WARN L293 SmtUtils]: Spent 22.73s 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 16:50:51,281 WARN L293 SmtUtils]: Spent 22.59s 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 16:51:19,612 WARN L293 SmtUtils]: Spent 23.22s 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 16:51:46,756 WARN L293 SmtUtils]: Spent 24.03s 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 16:52:14,155 WARN L293 SmtUtils]: Spent 23.72s 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 16:52:42,331 WARN L293 SmtUtils]: Spent 24.54s 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 16:53:01,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [960787067] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:53:01,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:53:01,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [11, 10, 10] total 49 [2023-12-02 16:53:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200989414] [2023-12-02 16:53:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:53:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 16:53:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:53:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 16:53:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2138, Unknown=27, NotChecked=0, Total=2352 [2023-12-02 16:53:01,084 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 16:53:10,197 WARN L293 SmtUtils]: Spent 7.12s 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 16:53:17,673 WARN L293 SmtUtils]: Spent 6.80s 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 16:53:25,465 WARN L293 SmtUtils]: Spent 7.22s 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 16:53:33,185 WARN L293 SmtUtils]: Spent 7.39s 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 16:53:40,372 WARN L293 SmtUtils]: Spent 6.82s 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 16:53:47,578 WARN L293 SmtUtils]: Spent 6.85s 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 16:53:55,414 WARN L293 SmtUtils]: Spent 7.32s 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 16:54:48,163 WARN L293 SmtUtils]: Spent 28.38s 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 16:55:33,594 WARN L293 SmtUtils]: Spent 38.77s 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 16:56:11,009 WARN L293 SmtUtils]: Spent 26.40s 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 16:56:45,623 WARN L293 SmtUtils]: Spent 28.87s 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 16:57:20,680 WARN L293 SmtUtils]: Spent 28.54s 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 16:58:04,095 WARN L293 SmtUtils]: Spent 29.22s 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 16:58:39,899 WARN L293 SmtUtils]: Spent 28.72s 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 16:59:16,241 WARN L293 SmtUtils]: Spent 29.55s 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 16:59:52,347 WARN L293 SmtUtils]: Spent 27.66s 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 17:00:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:34,028 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2023-12-02 17:00:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 17:00:34,028 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 17:00:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:34,030 INFO L225 Difference]: With dead ends: 177 [2023-12-02 17:00:34,030 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 17:00:34,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 566.4s TimeCoverageRelationStatistics Valid=315, Invalid=3804, Unknown=41, NotChecked=0, Total=4160 [2023-12-02 17:00:34,033 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 129 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 29 mSolverCounterUnsat, 33 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 33 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:34,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 474 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1554 Invalid, 33 Unknown, 0 Unchecked, 93.0s Time] [2023-12-02 17:00:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 17:00:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 108. [2023-12-02 17:00:34,190 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 17:00:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2023-12-02 17:00:34,191 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 71 [2023-12-02 17:00:34,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:34,191 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2023-12-02 17:00:34,192 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 17:00:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2023-12-02 17:00:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 17:00:34,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:34,193 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 17:00:34,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:34,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:34,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:34,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1779153524, now seen corresponding path program 1 times [2023-12-02 17:00:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:34,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736319863] [2023-12-02 17:00:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:34,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:34,909 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 17:00:34,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:34,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736319863] [2023-12-02 17:00:34,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736319863] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:34,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49205892] [2023-12-02 17:00:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:34,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:34,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:34,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:34,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60319afa-baa9-4bc7-8044-801f368baacc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:00:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:35,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 17:00:35,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:35,322 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 17:00:35,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:35,433 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 17:00:35,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49205892] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:35,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967248485] [2023-12-02 17:00:35,437 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-12-02 17:00:35,438 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:00:35,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:00:35,438 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:00:35,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs