./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_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_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/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_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/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_0e5559da-457c-4621-9523-36e42544ce5b/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 0f893dc40cf70b8d30dda6e110329e0bc2218e18bc668acf080889b069fe51ab --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:10:47,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:10:47,940 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:10:47,951 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:10:47,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:10:47,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:10:47,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:10:47,992 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:10:47,993 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:10:47,998 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:10:47,999 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:10:47,999 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:10:48,000 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:10:48,003 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:10:48,003 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:10:48,004 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:10:48,004 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:10:48,005 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:10:48,007 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:10:48,007 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:10:48,008 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:10:48,008 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:10:48,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:10:48,010 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:10:48,011 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:10:48,011 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:10:48,012 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:10:48,012 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:10:48,013 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:10:48,013 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:10:48,015 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:10:48,015 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:10:48,015 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:10:48,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:48,016 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:10:48,016 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:10:48,017 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:10:48,017 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:10:48,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:10:48,018 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:10:48,018 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:10:48,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:10:48,019 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_0e5559da-457c-4621-9523-36e42544ce5b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f893dc40cf70b8d30dda6e110329e0bc2218e18bc668acf080889b069fe51ab [2023-11-12 00:10:48,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:10:48,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:10:48,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:10:48,320 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:10:48,320 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:10:48,322 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i [2023-11-12 00:10:51,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:10:52,127 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:10:52,128 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i [2023-11-12 00:10:52,188 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/data/e63dbd839/5d80d8c61ab24f48b5596b273dba3ae8/FLAG330076617 [2023-11-12 00:10:52,210 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/data/e63dbd839/5d80d8c61ab24f48b5596b273dba3ae8 [2023-11-12 00:10:52,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:10:52,219 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:10:52,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:52,223 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:10:52,229 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:10:52,230 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:52" (1/1) ... [2023-11-12 00:10:52,231 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f11b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:52, skipping insertion in model container [2023-11-12 00:10:52,232 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:10:52" (1/1) ... [2023-11-12 00:10:52,413 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:10:52,801 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_0e5559da-457c-4621-9523-36e42544ce5b/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4493,4506] [2023-11-12 00:10:52,812 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_0e5559da-457c-4621-9523-36e42544ce5b/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4553,4566] [2023-11-12 00:10:54,214 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,215 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,221 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,222 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,224 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,239 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,240 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,243 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,244 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,246 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,248 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,249 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,249 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:54,851 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:10:54,853 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:10:54,854 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:10:54,856 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:10:54,857 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:10:54,858 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:10:54,859 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:10:54,860 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:10:54,861 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:10:54,862 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:10:55,531 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,531 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,559 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,563 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,571 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,571 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,595 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,597 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,598 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,599 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,599 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,600 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,600 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:55,711 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:10:55,735 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_0e5559da-457c-4621-9523-36e42544ce5b/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4493,4506] [2023-11-12 00:10:55,736 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_0e5559da-457c-4621-9523-36e42544ce5b/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4553,4566] [2023-11-12 00:10:55,792 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,793 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,793 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,794 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,796 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,808 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,808 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,812 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,813 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,814 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,815 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,815 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,815 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:55,854 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:10:55,855 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:10:55,856 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:10:55,857 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:10:55,858 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:10:55,859 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:10:55,860 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:10:55,861 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:10:55,908 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:10:55,909 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:10:55,964 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-11-12 00:10:56,079 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,080 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,087 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,088 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,092 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,093 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,109 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,110 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,110 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,111 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,111 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,112 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,112 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:10:56,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:10:56,382 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,382 WARN L672 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,382 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,382 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,382 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,383 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,383 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,383 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,383 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,383 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,383 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,383 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,383 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,384 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,384 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,384 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,384 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,384 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:10:56,393 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:10:56,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56 WrapperNode [2023-11-12 00:10:56,393 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:10:56,394 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:56,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:10:56,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:10:56,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,530 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,605 INFO L138 Inliner]: procedures = 772, calls = 2447, calls flagged for inlining = 67, calls inlined = 11, statements flattened = 623 [2023-11-12 00:10:56,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:10:56,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:10:56,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:10:56,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:10:56,618 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,631 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,632 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,675 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,681 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,692 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,699 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:10:56,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:10:56,730 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:10:56,731 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:10:56,732 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (1/1) ... [2023-11-12 00:10:56,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:10:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:56,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:10:56,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:10:56,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-12 00:10:56,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:10:56,880 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:10:56,880 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:10:56,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:10:56,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:10:56,881 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-12 00:10:56,882 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-12 00:10:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:10:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:10:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:10:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:10:56,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:10:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:10:56,883 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:10:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 00:10:56,883 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 00:10:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-12 00:10:56,885 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-12 00:10:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:10:56,885 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 00:10:56,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 00:10:56,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:10:56,886 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:10:56,886 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:10:56,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:10:56,886 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-12 00:10:56,886 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-12 00:10:56,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:10:56,887 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_begin [2023-11-12 00:10:56,887 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_begin [2023-11-12 00:10:56,887 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-12 00:10:56,887 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-12 00:10:56,887 INFO L130 BoogieDeclarations]: Found specification of procedure s_get_next_element [2023-11-12 00:10:56,888 INFO L138 BoogieDeclarations]: Found implementation of procedure s_get_next_element [2023-11-12 00:10:56,888 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:10:56,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:10:56,888 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2023-11-12 00:10:56,888 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2023-11-12 00:10:56,889 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-12 00:10:56,889 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-12 00:10:56,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:10:56,889 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 00:10:56,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 00:10:56,890 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 00:10:56,890 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 00:10:56,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:10:57,332 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:10:57,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:10:57,475 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !true; [2023-11-12 00:10:58,635 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:10:59,072 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:10:59,073 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 00:10:59,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:10:59 BoogieIcfgContainer [2023-11-12 00:10:59,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:10:59,084 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:10:59,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:10:59,092 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:10:59,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:10:52" (1/3) ... [2023-11-12 00:10:59,096 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8bd8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:10:59, skipping insertion in model container [2023-11-12 00:10:59,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:10:56" (2/3) ... [2023-11-12 00:10:59,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8bd8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:10:59, skipping insertion in model container [2023-11-12 00:10:59,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:10:59" (3/3) ... [2023-11-12 00:10:59,101 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_begin_harness.i [2023-11-12 00:10:59,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:10:59,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:10:59,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:10:59,232 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;@7aff804a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:10:59,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:10:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 73 states have internal predecessors, (88), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-12 00:10:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 00:10:59,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:10:59,266 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:10:59,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:10:59,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:10:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash -101302106, now seen corresponding path program 1 times [2023-11-12 00:10:59,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:10:59,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987128057] [2023-11-12 00:10:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:59,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:10:59,731 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:10:59,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526066448] [2023-11-12 00:10:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:10:59,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:10:59,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:10:59,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:10:59,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:11:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:00,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 00:11:00,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-12 00:11:00,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:00,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:00,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987128057] [2023-11-12 00:11:00,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:11:00,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526066448] [2023-11-12 00:11:00,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526066448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:00,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:00,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:11:00,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994034040] [2023-11-12 00:11:00,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:11:00,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:00,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:11:00,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:11:00,795 INFO L87 Difference]: Start difference. First operand has 131 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 73 states have internal predecessors, (88), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-12 00:11:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:01,252 INFO L93 Difference]: Finished difference Result 199 states and 263 transitions. [2023-11-12 00:11:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:11:01,256 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 110 [2023-11-12 00:11:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:01,274 INFO L225 Difference]: With dead ends: 199 [2023-11-12 00:11:01,274 INFO L226 Difference]: Without dead ends: 129 [2023-11-12 00:11:01,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:11:01,291 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:01,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:11:01,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-12 00:11:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-12 00:11:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 72 states have internal predecessors, (83), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-12 00:11:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 162 transitions. [2023-11-12 00:11:01,389 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 162 transitions. Word has length 110 [2023-11-12 00:11:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:01,394 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 162 transitions. [2023-11-12 00:11:01,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-12 00:11:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 162 transitions. [2023-11-12 00:11:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-12 00:11:01,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:01,407 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:01,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:11:01,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:01,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1673466833, now seen corresponding path program 1 times [2023-11-12 00:11:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:01,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248979611] [2023-11-12 00:11:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:01,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:01,935 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:11:01,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274551914] [2023-11-12 00:11:01,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:01,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:01,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:01,940 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:01,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:11:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:02,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 2532 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:11:02,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-12 00:11:03,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:11:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-12 00:11:03,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:03,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248979611] [2023-11-12 00:11:03,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:11:03,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274551914] [2023-11-12 00:11:03,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274551914] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:03,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:03,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-11-12 00:11:03,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208224254] [2023-11-12 00:11:03,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:03,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:11:03,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:03,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:11:03,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:11:03,508 INFO L87 Difference]: Start difference. First operand 129 states and 162 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-12 00:11:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:04,613 INFO L93 Difference]: Finished difference Result 178 states and 223 transitions. [2023-11-12 00:11:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:11:04,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 115 [2023-11-12 00:11:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:04,620 INFO L225 Difference]: With dead ends: 178 [2023-11-12 00:11:04,620 INFO L226 Difference]: Without dead ends: 131 [2023-11-12 00:11:04,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:11:04,623 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 143 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:04,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 677 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:11:04,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-12 00:11:04,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-12 00:11:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 40 states have call successors, (40), 17 states have call predecessors, (40), 18 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2023-11-12 00:11:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 164 transitions. [2023-11-12 00:11:04,648 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 164 transitions. Word has length 115 [2023-11-12 00:11:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:04,649 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 164 transitions. [2023-11-12 00:11:04,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-12 00:11:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 164 transitions. [2023-11-12 00:11:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-12 00:11:04,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:04,653 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:04,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:04,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:04,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:04,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:04,866 INFO L85 PathProgramCache]: Analyzing trace with hash -707815043, now seen corresponding path program 1 times [2023-11-12 00:11:04,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:04,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711636791] [2023-11-12 00:11:04,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:04,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:05,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:11:05,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246879395] [2023-11-12 00:11:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:05,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:05,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:05,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:05,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:11:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:05,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:11:05,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-12 00:11:05,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:05,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:05,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711636791] [2023-11-12 00:11:05,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:11:05,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246879395] [2023-11-12 00:11:05,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246879395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:05,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:05,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:11:05,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433985634] [2023-11-12 00:11:05,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:05,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:11:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:11:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:11:05,948 INFO L87 Difference]: Start difference. First operand 131 states and 164 transitions. Second operand has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-12 00:11:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:06,508 INFO L93 Difference]: Finished difference Result 256 states and 321 transitions. [2023-11-12 00:11:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:11:06,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 116 [2023-11-12 00:11:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:06,512 INFO L225 Difference]: With dead ends: 256 [2023-11-12 00:11:06,512 INFO L226 Difference]: Without dead ends: 135 [2023-11-12 00:11:06,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 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 00:11:06,515 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 1 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:06,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 548 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:11:06,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-12 00:11:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-12 00:11:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.16) internal successors, (87), 77 states have internal predecessors, (87), 40 states have call successors, (40), 17 states have call predecessors, (40), 19 states have return successors, (41), 40 states have call predecessors, (41), 39 states have call successors, (41) [2023-11-12 00:11:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 168 transitions. [2023-11-12 00:11:06,536 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 168 transitions. Word has length 116 [2023-11-12 00:11:06,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:06,537 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 168 transitions. [2023-11-12 00:11:06,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-12 00:11:06,537 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 168 transitions. [2023-11-12 00:11:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-12 00:11:06,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:06,540 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:06,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:06,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:06,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:06,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1579337161, now seen corresponding path program 1 times [2023-11-12 00:11:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:06,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535601127] [2023-11-12 00:11:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:06,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-12 00:11:10,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:10,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535601127] [2023-11-12 00:11:10,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535601127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:10,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:10,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 00:11:10,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628502571] [2023-11-12 00:11:10,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:10,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:11:10,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:11:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:11:10,105 INFO L87 Difference]: Start difference. First operand 135 states and 168 transitions. Second operand has 11 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:11:11,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:11,509 INFO L93 Difference]: Finished difference Result 186 states and 231 transitions. [2023-11-12 00:11:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:11:11,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) Word has length 124 [2023-11-12 00:11:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:11,512 INFO L225 Difference]: With dead ends: 186 [2023-11-12 00:11:11,513 INFO L226 Difference]: Without dead ends: 137 [2023-11-12 00:11:11,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:11:11,514 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 33 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:11,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1080 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-12 00:11:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-12 00:11:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-11-12 00:11:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 40 states have call successors, (40), 17 states have call predecessors, (40), 20 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2023-11-12 00:11:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2023-11-12 00:11:11,534 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 124 [2023-11-12 00:11:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:11,535 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2023-11-12 00:11:11,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (22), 5 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:11:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2023-11-12 00:11:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-12 00:11:11,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:11,538 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:11,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:11:11,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:11,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash -882100433, now seen corresponding path program 1 times [2023-11-12 00:11:11,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:11,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59009942] [2023-11-12 00:11:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:11,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-12 00:11:13,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:13,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59009942] [2023-11-12 00:11:13,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59009942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:13,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:11:13,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-12 00:11:13,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605160481] [2023-11-12 00:11:13,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:13,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:11:13,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:13,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:11:13,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:11:13,864 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-12 00:11:16,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:16,285 INFO L93 Difference]: Finished difference Result 194 states and 240 transitions. [2023-11-12 00:11:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:11:16,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 128 [2023-11-12 00:11:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:16,289 INFO L225 Difference]: With dead ends: 194 [2023-11-12 00:11:16,289 INFO L226 Difference]: Without dead ends: 148 [2023-11-12 00:11:16,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:11:16,291 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 84 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:16,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 576 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-12 00:11:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-12 00:11:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2023-11-12 00:11:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.16) internal successors, (87), 77 states have internal predecessors, (87), 40 states have call successors, (40), 17 states have call predecessors, (40), 19 states have return successors, (41), 40 states have call predecessors, (41), 39 states have call successors, (41) [2023-11-12 00:11:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 168 transitions. [2023-11-12 00:11:16,311 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 168 transitions. Word has length 128 [2023-11-12 00:11:16,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:16,312 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 168 transitions. [2023-11-12 00:11:16,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-12 00:11:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 168 transitions. [2023-11-12 00:11:16,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-12 00:11:16,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:16,315 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:16,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:11:16,316 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:16,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:16,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1019093599, now seen corresponding path program 1 times [2023-11-12 00:11:16,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:16,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199594107] [2023-11-12 00:11:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:16,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-12 00:11:21,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199594107] [2023-11-12 00:11:21,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199594107] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584548491] [2023-11-12 00:11:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:21,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:21,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:21,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:21,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:11:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:22,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-12 00:11:22,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-12 00:11:22,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:22,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584548491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:22,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:22,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 23 [2023-11-12 00:11:22,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944200226] [2023-11-12 00:11:22,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:22,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:11:22,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:22,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:11:22,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:11:22,824 INFO L87 Difference]: Start difference. First operand 135 states and 168 transitions. Second operand has 7 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2023-11-12 00:11:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:11:23,658 INFO L93 Difference]: Finished difference Result 252 states and 315 transitions. [2023-11-12 00:11:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:11:23,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 130 [2023-11-12 00:11:23,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:11:23,661 INFO L225 Difference]: With dead ends: 252 [2023-11-12 00:11:23,661 INFO L226 Difference]: Without dead ends: 137 [2023-11-12 00:11:23,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:11:23,663 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 110 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:11:23,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 351 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:11:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-12 00:11:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-11-12 00:11:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 40 states have call successors, (40), 17 states have call predecessors, (40), 20 states have return successors, (45), 40 states have call predecessors, (45), 39 states have call successors, (45) [2023-11-12 00:11:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2023-11-12 00:11:23,703 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 130 [2023-11-12 00:11:23,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:11:23,704 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2023-11-12 00:11:23,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2023-11-12 00:11:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2023-11-12 00:11:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-12 00:11:23,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:11:23,708 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:11:23,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:11:23,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:11:23,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:11:23,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:11:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1312436489, now seen corresponding path program 1 times [2023-11-12 00:11:23,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:11:23,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697018684] [2023-11-12 00:11:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:23,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:11:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-11-12 00:11:25,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:11:25,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697018684] [2023-11-12 00:11:25,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697018684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:11:25,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902235843] [2023-11-12 00:11:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:11:25,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:11:25,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:11:25,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:11:25,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e5559da-457c-4621-9523-36e42544ce5b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:11:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:11:26,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 2577 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 00:11:26,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:11:26,420 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 00:11:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 00:11:26,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:11:26,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902235843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:11:26,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:11:26,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 20 [2023-11-12 00:11:26,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144495499] [2023-11-12 00:11:26,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:11:26,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:11:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:11:26,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:11:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:11:26,775 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand has 12 states, 9 states have (on average 7.333333333333333) internal successors, (66), 10 states have internal predecessors, (66), 5 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-11-12 00:11:30,796 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 00:11:32,920 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]