./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/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_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/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_6f71600b-3e52-4fae-961f-9e0bfd7412f9/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 c9f60659fbb0886b2c3c86084c4cc81dbedd027936fc1dda43226ecbc4710056 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:52:01,505 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:52:01,620 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:52:01,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:52:01,629 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:52:01,669 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:52:01,670 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:52:01,670 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:52:01,671 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:52:01,676 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:52:01,677 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:52:01,678 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:52:01,678 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:52:01,680 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:52:01,680 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:52:01,681 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:52:01,681 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:52:01,682 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:52:01,682 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:52:01,683 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:52:01,683 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:52:01,684 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:52:01,685 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:52:01,685 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:52:01,686 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:52:01,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:52:01,687 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:52:01,687 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:52:01,687 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:52:01,688 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:52:01,689 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:52:01,690 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:52:01,690 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:52:01,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:52:01,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:52:01,691 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:52:01,691 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:52:01,691 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:52:01,691 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:52:01,692 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:52:01,692 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:52:01,692 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:52:01,693 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_6f71600b-3e52-4fae-961f-9e0bfd7412f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9f60659fbb0886b2c3c86084c4cc81dbedd027936fc1dda43226ecbc4710056 [2023-11-12 00:52:02,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:52:02,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:52:02,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:52:02,052 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:52:02,052 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:52:02,053 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i [2023-11-12 00:52:05,083 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:52:05,711 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:52:05,713 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i [2023-11-12 00:52:05,764 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/data/b884b6da8/bac97e3e2e3e440aa9e37eea4b86b3b3/FLAG41db88fb6 [2023-11-12 00:52:05,780 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/data/b884b6da8/bac97e3e2e3e440aa9e37eea4b86b3b3 [2023-11-12 00:52:05,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:52:05,787 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:52:05,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:52:05,791 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:52:05,796 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:52:05,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:52:05" (1/1) ... [2023-11-12 00:52:05,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ebef92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:05, skipping insertion in model container [2023-11-12 00:52:05,798 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:52:05" (1/1) ... [2023-11-12 00:52:05,955 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:52:06,248 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_6f71600b-3e52-4fae-961f-9e0bfd7412f9/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4486,4499] [2023-11-12 00:52:06,257 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_6f71600b-3e52-4fae-961f-9e0bfd7412f9/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4546,4559] [2023-11-12 00:52:07,538 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:07,539 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:07,540 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:07,541 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:07,542 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:07,556 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:07,557 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:07,559 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:07,560 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:07,961 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:52:07,963 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:52:07,965 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:52:07,970 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:52:07,980 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:52:07,984 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:52:07,985 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:52:07,988 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:52:07,989 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:52:07,993 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:52:08,379 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,380 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:52:08,494 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:52:08,507 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_6f71600b-3e52-4fae-961f-9e0bfd7412f9/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4486,4499] [2023-11-12 00:52:08,508 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_6f71600b-3e52-4fae-961f-9e0bfd7412f9/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4546,4559] [2023-11-12 00:52:08,550 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,557 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,560 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,564 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,564 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,570 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,571 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,572 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,573 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,605 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:52:08,606 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:52:08,607 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:52:08,607 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:52:08,608 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:52:08,609 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:52:08,609 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:52:08,610 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:52:08,610 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:52:08,611 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:52:08,686 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8277] [2023-11-12 00:52:08,688 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,688 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:52:08,746 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8763-8774] [2023-11-12 00:52:08,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:52:09,094 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,094 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,094 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,095 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,096 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,096 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,096 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,096 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,097 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,097 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,097 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,098 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,098 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,099 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,099 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,101 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,102 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,102 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:52:09,110 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:52:09,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09 WrapperNode [2023-11-12 00:52:09,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:52:09,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:52:09,112 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:52:09,112 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:52:09,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,384 INFO L138 Inliner]: procedures = 690, calls = 2619, calls flagged for inlining = 59, calls inlined = 5, statements flattened = 792 [2023-11-12 00:52:09,385 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:52:09,385 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:52:09,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:52:09,386 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:52:09,395 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,395 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,409 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,462 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,483 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,495 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,503 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:52:09,504 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:52:09,504 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:52:09,504 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:52:09,505 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (1/1) ... [2023-11-12 00:52:09,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:52:09,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:09,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:52:09,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:52:09,624 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-12 00:52:09,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:52:09,626 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:52:09,626 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:52:09,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:52:09,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:52:09,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:52:09,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:52:09,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:52:09,627 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2023-11-12 00:52:09,628 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2023-11-12 00:52:09,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:52:09,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:52:09,629 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:52:09,629 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:52:09,629 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-12 00:52:09,630 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-12 00:52:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-12 00:52:09,630 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-12 00:52:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:52:09,630 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:52:09,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:52:09,631 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2023-11-12 00:52:09,631 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2023-11-12 00:52:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:52:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:52:09,632 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:52:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:52:09,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:52:09,952 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:52:09,954 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:52:11,438 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:52:11,607 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:52:11,607 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:52:11,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:52:11 BoogieIcfgContainer [2023-11-12 00:52:11,612 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:52:11,615 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:52:11,615 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:52:11,618 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:52:11,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:52:05" (1/3) ... [2023-11-12 00:52:11,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785ab06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:52:11, skipping insertion in model container [2023-11-12 00:52:11,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:52:09" (2/3) ... [2023-11-12 00:52:11,622 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785ab06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:52:11, skipping insertion in model container [2023-11-12 00:52:11,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:52:11" (3/3) ... [2023-11-12 00:52:11,624 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_eq_harness.i [2023-11-12 00:52:11,645 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:52:11,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:52:11,717 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:52:11,730 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;@22cc7c78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:52:11,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:52:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-12 00:52:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:52:11,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:11,750 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-12 00:52:11,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:11,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:11,757 INFO L85 PathProgramCache]: Analyzing trace with hash 736196803, now seen corresponding path program 1 times [2023-11-12 00:52:11,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:11,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112835836] [2023-11-12 00:52:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:11,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 00:52:15,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:15,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112835836] [2023-11-12 00:52:15,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112835836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:52:15,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759876909] [2023-11-12 00:52:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:15,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:52:15,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:15,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:52:15,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:52:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:16,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 2424 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:52:16,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:52:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:52:16,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:52:16,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759876909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:16,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:52:16,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-11-12 00:52:16,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044353118] [2023-11-12 00:52:16,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:16,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:52:16,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:52:16,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:52:16,447 INFO L87 Difference]: Start difference. First operand has 74 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-12 00:52:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:16,663 INFO L93 Difference]: Finished difference Result 134 states and 194 transitions. [2023-11-12 00:52:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:52:16,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 50 [2023-11-12 00:52:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:16,675 INFO L225 Difference]: With dead ends: 134 [2023-11-12 00:52:16,675 INFO L226 Difference]: Without dead ends: 99 [2023-11-12 00:52:16,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:52:16,682 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 18 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:16,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:52:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-12 00:52:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2023-11-12 00:52:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 47 states have internal predecessors, (54), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-12 00:52:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2023-11-12 00:52:16,734 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 50 [2023-11-12 00:52:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:16,735 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2023-11-12 00:52:16,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-12 00:52:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2023-11-12 00:52:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 00:52:16,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:16,739 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-12 00:52:16,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:52:16,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:52:16,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:16,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:16,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1241944069, now seen corresponding path program 1 times [2023-11-12 00:52:16,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:16,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134020738] [2023-11-12 00:52:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:16,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:52:17,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:17,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134020738] [2023-11-12 00:52:17,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134020738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:17,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:17,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:52:17,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376268083] [2023-11-12 00:52:17,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:17,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:52:17,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:52:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:52:17,638 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-12 00:52:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:17,812 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2023-11-12 00:52:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:52:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 54 [2023-11-12 00:52:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:17,817 INFO L225 Difference]: With dead ends: 144 [2023-11-12 00:52:17,818 INFO L226 Difference]: Without dead ends: 115 [2023-11-12 00:52:17,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:52:17,820 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:17,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 406 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:52:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-12 00:52:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2023-11-12 00:52:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 states have internal predecessors, (69), 45 states have call successors, (45), 10 states have call predecessors, (45), 11 states have return successors, (47), 43 states have call predecessors, (47), 44 states have call successors, (47) [2023-11-12 00:52:17,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2023-11-12 00:52:17,842 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 54 [2023-11-12 00:52:17,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:17,843 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2023-11-12 00:52:17,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-12 00:52:17,843 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2023-11-12 00:52:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 00:52:17,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:17,847 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-12 00:52:17,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:52:17,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:17,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -548565407, now seen corresponding path program 1 times [2023-11-12 00:52:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:17,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008710292] [2023-11-12 00:52:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:52:18,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:18,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008710292] [2023-11-12 00:52:18,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008710292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:18,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:18,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:52:18,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382855147] [2023-11-12 00:52:18,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:18,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:52:18,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:52:18,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:52:18,622 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:52:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:18,852 INFO L93 Difference]: Finished difference Result 131 states and 179 transitions. [2023-11-12 00:52:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:52:18,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 55 [2023-11-12 00:52:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:18,858 INFO L225 Difference]: With dead ends: 131 [2023-11-12 00:52:18,859 INFO L226 Difference]: Without dead ends: 106 [2023-11-12 00:52:18,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:52:18,863 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 18 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:18,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 507 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:52:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-12 00:52:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2023-11-12 00:52:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 56 states have internal predecessors, (64), 39 states have call successors, (39), 10 states have call predecessors, (39), 11 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2023-11-12 00:52:18,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2023-11-12 00:52:18,898 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 55 [2023-11-12 00:52:18,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:18,900 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2023-11-12 00:52:18,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:52:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2023-11-12 00:52:18,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 00:52:18,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:18,908 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 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] [2023-11-12 00:52:18,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:52:18,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:18,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1705899325, now seen corresponding path program 1 times [2023-11-12 00:52:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:18,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612743768] [2023-11-12 00:52:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-12 00:52:21,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:21,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612743768] [2023-11-12 00:52:21,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612743768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:52:21,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124663707] [2023-11-12 00:52:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:21,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:52:21,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:21,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:52:21,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:52:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:22,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 2458 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 00:52:22,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:52:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 00:52:22,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:52:22,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124663707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:22,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:52:22,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 18 [2023-11-12 00:52:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136896088] [2023-11-12 00:52:22,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:22,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:52:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:52:22,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:52:22,942 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-12 00:52:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:23,322 INFO L93 Difference]: Finished difference Result 115 states and 156 transitions. [2023-11-12 00:52:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:52:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 62 [2023-11-12 00:52:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:23,325 INFO L225 Difference]: With dead ends: 115 [2023-11-12 00:52:23,325 INFO L226 Difference]: Without dead ends: 113 [2023-11-12 00:52:23,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:52:23,326 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 20 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:23,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 490 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:52:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-12 00:52:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2023-11-12 00:52:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 59 states have internal predecessors, (67), 39 states have call successors, (39), 11 states have call predecessors, (39), 12 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2023-11-12 00:52:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2023-11-12 00:52:23,346 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 62 [2023-11-12 00:52:23,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:23,347 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2023-11-12 00:52:23,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-12 00:52:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2023-11-12 00:52:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 00:52:23,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:23,349 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-11-12 00:52:23,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:52:23,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-12 00:52:23,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:23,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash -806179689, now seen corresponding path program 1 times [2023-11-12 00:52:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:23,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952212827] [2023-11-12 00:52:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:23,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-12 00:52:25,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:25,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952212827] [2023-11-12 00:52:25,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952212827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:52:25,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172065563] [2023-11-12 00:52:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:25,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:52:25,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:25,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:52:25,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:52:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:25,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 00:52:25,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:52:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:52:26,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:52:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-12 00:52:27,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172065563] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:52:27,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:52:27,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12, 14] total 34 [2023-11-12 00:52:27,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642437448] [2023-11-12 00:52:27,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:27,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:52:27,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:27,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:52:27,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 00:52:27,107 INFO L87 Difference]: Start difference. First operand 108 states and 147 transitions. Second operand has 14 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-12 00:52:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:28,347 INFO L93 Difference]: Finished difference Result 164 states and 228 transitions. [2023-11-12 00:52:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:52:28,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 62 [2023-11-12 00:52:28,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:28,350 INFO L225 Difference]: With dead ends: 164 [2023-11-12 00:52:28,350 INFO L226 Difference]: Without dead ends: 135 [2023-11-12 00:52:28,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2023-11-12 00:52:28,353 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 181 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:28,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 506 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:52:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-12 00:52:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 101. [2023-11-12 00:52:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 57 states have internal predecessors, (63), 35 states have call successors, (35), 10 states have call predecessors, (35), 12 states have return successors, (43), 34 states have call predecessors, (43), 34 states have call successors, (43) [2023-11-12 00:52:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 141 transitions. [2023-11-12 00:52:28,389 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 141 transitions. Word has length 62 [2023-11-12 00:52:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:52:28,391 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 141 transitions. [2023-11-12 00:52:28,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-12 00:52:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 141 transitions. [2023-11-12 00:52:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-12 00:52:28,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:28,394 INFO L195 NwaCegarLoop]: trace histogram [7, 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] [2023-11-12 00:52:28,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:52:28,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:52:28,613 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:28,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:28,614 INFO L85 PathProgramCache]: Analyzing trace with hash 679985305, now seen corresponding path program 1 times [2023-11-12 00:52:28,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:28,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806430915] [2023-11-12 00:52:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:28,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 00:52:30,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:30,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806430915] [2023-11-12 00:52:30,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806430915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:52:30,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563027608] [2023-11-12 00:52:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:30,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:52:30,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:52:30,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:52:30,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f71600b-3e52-4fae-961f-9e0bfd7412f9/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:52:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:30,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 2530 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 00:52:30,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:52:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 00:52:31,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:52:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 00:52:32,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563027608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:52:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [878851257] [2023-11-12 00:52:32,141 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2023-11-12 00:52:32,141 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:52:32,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:52:32,151 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:52:32,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs