./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 76206b4f7fb4016a4087a30dbd51e90ef533ed916c2eae20331e23ac9a9e91be --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:08:28,239 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:08:28,329 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:08:28,335 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:08:28,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:08:28,361 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:08:28,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:08:28,363 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:08:28,364 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:08:28,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:08:28,365 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:08:28,365 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:08:28,366 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:08:28,366 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:08:28,367 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:08:28,368 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:08:28,368 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:08:28,369 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:08:28,369 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:08:28,370 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:08:28,370 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:08:28,371 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:08:28,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:08:28,373 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:08:28,373 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:08:28,374 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:08:28,374 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:08:28,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:08:28,375 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:08:28,376 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:08:28,376 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:08:28,377 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:08:28,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:08:28,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:08:28,378 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:08:28,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:08:28,379 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:08:28,379 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:08:28,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:08:28,380 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:08:28,381 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:08:28,381 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:08:28,382 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_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76206b4f7fb4016a4087a30dbd51e90ef533ed916c2eae20331e23ac9a9e91be [2023-11-12 00:08:28,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:08:28,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:08:28,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:08:28,741 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:08:28,742 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:08:28,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness.i [2023-11-12 00:08:31,896 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:08:32,656 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:08:32,658 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness.i [2023-11-12 00:08:32,713 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/data/9089fb5cb/729a4b4c00c14006b48538b8156c8f56/FLAGacb7e3591 [2023-11-12 00:08:32,733 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/data/9089fb5cb/729a4b4c00c14006b48538b8156c8f56 [2023-11-12 00:08:32,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:08:32,743 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:08:32,744 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:08:32,745 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:08:32,751 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:08:32,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:08:32" (1/1) ... [2023-11-12 00:08:32,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42967a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:32, skipping insertion in model container [2023-11-12 00:08:32,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:08:32" (1/1) ... [2023-11-12 00:08:32,920 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:08:33,265 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_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness.i[4494,4507] [2023-11-12 00:08:33,278 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_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness.i[4554,4567] [2023-11-12 00:08:35,186 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,188 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,189 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,190 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,199 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,233 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,235 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,238 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,244 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,246 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,252 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,253 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,257 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:35,951 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:08:35,952 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:08:35,953 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:08:35,955 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:08:35,956 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:08:35,957 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:08:35,958 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:08:35,959 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:08:35,959 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:08:35,960 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:08:36,574 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,575 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,615 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,617 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,626 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,627 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,655 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,656 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,657 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,657 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,658 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,658 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,659 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:08:36,763 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:08:36,787 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_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness.i[4494,4507] [2023-11-12 00:08:36,788 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_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness.i[4554,4567] [2023-11-12 00:08:36,838 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,839 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,839 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,840 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,843 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,849 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,852 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,853 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,853 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,854 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,855 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,856 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,856 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:36,889 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:08:36,890 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:08:36,891 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:08:36,892 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:08:36,893 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:08:36,894 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:08:36,894 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:08:36,896 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:08:36,896 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:08:36,897 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:08:36,952 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7585-7596] [2023-11-12 00:08:37,068 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,070 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,080 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,081 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,084 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,085 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,101 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,102 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,103 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,103 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,104 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,106 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,106 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:08:37,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:08:37,591 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,591 WARN L672 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,591 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,591 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,591 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,592 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,592 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,592 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,592 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,592 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,593 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,593 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,593 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,593 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,593 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,594 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,594 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,594 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:08:37,602 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:08:37,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37 WrapperNode [2023-11-12 00:08:37,604 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:08:37,605 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:08:37,606 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:08:37,606 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:08:37,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,843 INFO L138 Inliner]: procedures = 773, calls = 2441, calls flagged for inlining = 68, calls inlined = 13, statements flattened = 611 [2023-11-12 00:08:37,843 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:08:37,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:08:37,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:08:37,845 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:08:37,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,864 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,864 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,908 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,913 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,923 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,929 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:08:37,943 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:08:37,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:08:37,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:08:37,944 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (1/1) ... [2023-11-12 00:08:37,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:08:37,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:08:37,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:08:38,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:08:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure memset_override_0_impl [2023-11-12 00:08:38,043 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_override_0_impl [2023-11-12 00:08:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-12 00:08:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:08:38,044 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:08:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:08:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:08:38,045 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:08:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:08:38,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:08:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-12 00:08:38,046 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-12 00:08:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_clear [2023-11-12 00:08:38,046 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_clear [2023-11-12 00:08:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:08:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:08:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:08:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:08:38,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:08:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:08:38,049 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:08:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 00:08:38,049 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 00:08:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:08:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 00:08:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 00:08:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:08:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:08:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:08:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:08:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-12 00:08:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-12 00:08:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-12 00:08:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-12 00:08:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:08:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-12 00:08:38,052 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-12 00:08:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:08:38,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:08:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:08:38,053 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:08:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-12 00:08:38,053 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-12 00:08:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:08:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 00:08:38,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 00:08:38,055 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 00:08:38,055 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 00:08:38,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:08:38,480 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:08:38,486 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:08:39,805 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:08:40,018 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:08:40,018 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:08:40,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:08:40 BoogieIcfgContainer [2023-11-12 00:08:40,023 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:08:40,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:08:40,031 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:08:40,035 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:08:40,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:08:32" (1/3) ... [2023-11-12 00:08:40,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f50dc9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:08:40, skipping insertion in model container [2023-11-12 00:08:40,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:08:37" (2/3) ... [2023-11-12 00:08:40,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f50dc9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:08:40, skipping insertion in model container [2023-11-12 00:08:40,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:08:40" (3/3) ... [2023-11-12 00:08:40,041 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_clear_harness.i [2023-11-12 00:08:40,061 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:08:40,068 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:08:40,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:08:40,150 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;@5a9bb64b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:08:40,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:08:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-12 00:08:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-12 00:08:40,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:08:40,175 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:08:40,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:08:40,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:08:40,184 INFO L85 PathProgramCache]: Analyzing trace with hash -484344292, now seen corresponding path program 1 times [2023-11-12 00:08:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:08:40,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463495950] [2023-11-12 00:08:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:08:40,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:08:40,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:08:40,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299269639] [2023-11-12 00:08:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:08:40,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:08:40,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:08:40,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:08:40,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:08:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:08:41,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:08:41,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:08:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-12 00:08:41,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:08:41,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:08:41,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463495950] [2023-11-12 00:08:41,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:08:41,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299269639] [2023-11-12 00:08:41,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299269639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:08:41,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:08:41,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:08:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321348703] [2023-11-12 00:08:41,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:08:41,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:08:41,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:08:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:08:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:08:41,645 INFO L87 Difference]: Start difference. First operand has 137 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-12 00:08:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:08:42,122 INFO L93 Difference]: Finished difference Result 244 states and 317 transitions. [2023-11-12 00:08:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:08:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 99 [2023-11-12 00:08:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:08:42,136 INFO L225 Difference]: With dead ends: 244 [2023-11-12 00:08:42,136 INFO L226 Difference]: Without dead ends: 138 [2023-11-12 00:08:42,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:08:42,151 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:08:42,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 576 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:08:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-12 00:08:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-11-12 00:08:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 77 states have (on average 1.155844155844156) internal successors, (89), 78 states have internal predecessors, (89), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) [2023-11-12 00:08:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 171 transitions. [2023-11-12 00:08:42,238 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 171 transitions. Word has length 99 [2023-11-12 00:08:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:08:42,240 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 171 transitions. [2023-11-12 00:08:42,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-12 00:08:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 171 transitions. [2023-11-12 00:08:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:08:42,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:08:42,254 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:08:42,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:08:42,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:08:42,465 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:08:42,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:08:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash -529906335, now seen corresponding path program 1 times [2023-11-12 00:08:42,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:08:42,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760366738] [2023-11-12 00:08:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:08:42,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:08:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:08:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-12 00:08:45,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:08:45,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760366738] [2023-11-12 00:08:45,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760366738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:08:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465564644] [2023-11-12 00:08:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:08:45,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:08:45,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:08:45,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:08:45,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:08:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:08:45,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 2309 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 00:08:45,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:08:46,068 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 00:08:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 00:08:46,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:08:46,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465564644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:08:46,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:08:46,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2023-11-12 00:08:46,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104957811] [2023-11-12 00:08:46,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:08:46,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:08:46,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:08:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:08:46,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:08:46,616 INFO L87 Difference]: Start difference. First operand 138 states and 171 transitions. Second operand has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:08:50,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 00:08:52,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:08:54,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:08:56,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:08:58,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:09:00,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:09:03,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:09:05,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:09:07,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:09:09,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:09:11,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:09:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:09:11,628 INFO L93 Difference]: Finished difference Result 272 states and 329 transitions. [2023-11-12 00:09:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:09:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 103 [2023-11-12 00:09:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:09:11,633 INFO L225 Difference]: With dead ends: 272 [2023-11-12 00:09:11,634 INFO L226 Difference]: Without dead ends: 182 [2023-11-12 00:09:11,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:09:11,636 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 59 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 12 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:09:11,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 878 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 403 Invalid, 11 Unknown, 0 Unchecked, 24.8s Time] [2023-11-12 00:09:11,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-12 00:09:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2023-11-12 00:09:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 103 states have internal predecessors, (115), 49 states have call successors, (49), 28 states have call predecessors, (49), 30 states have return successors, (51), 49 states have call predecessors, (51), 48 states have call successors, (51) [2023-11-12 00:09:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2023-11-12 00:09:11,664 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 103 [2023-11-12 00:09:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:09:11,665 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2023-11-12 00:09:11,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:09:11,665 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2023-11-12 00:09:11,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-12 00:09:11,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:09:11,668 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:09:11,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:09:11,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:11,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:09:11,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:09:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash 986409729, now seen corresponding path program 1 times [2023-11-12 00:09:11,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:09:11,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297253139] [2023-11-12 00:09:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:11,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:09:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-12 00:09:13,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:09:13,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297253139] [2023-11-12 00:09:13,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297253139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:09:13,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103228500] [2023-11-12 00:09:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:09:13,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:09:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:09:13,340 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:09:13,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fb6cb84-b8b4-4dc2-819e-2e02fbad02aa/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:09:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:09:13,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 2333 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 00:09:13,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:09:14,090 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 00:09:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 00:09:14,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:09:14,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103228500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:09:14,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:09:14,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 20 [2023-11-12 00:09:14,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575031646] [2023-11-12 00:09:14,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:09:14,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:09:14,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:09:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:09:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:09:14,422 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 12 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-12 00:09:18,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 00:09:20,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:09:22,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:09:25,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:09:27,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]