./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1baae56bade188786b6c048f5a5545dd6165460ea50e58a0310e4360c89d1838 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:56:04,869 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:56:04,949 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 16:56:04,955 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:56:04,956 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:56:04,977 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:56:04,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:56:04,979 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:56:04,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:56:04,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:56:04,980 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:56:04,981 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:56:04,981 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:56:04,982 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:56:04,982 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:56:04,983 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:56:04,983 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:56:04,984 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:56:04,984 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:56:04,985 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:56:04,985 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:56:04,989 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:56:04,990 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:56:04,990 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:56:04,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:56:04,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:56:04,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:56:04,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:56:04,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:56:04,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:56:04,993 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:56:04,993 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:56:04,994 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:56:04,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:56:04,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:56:04,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:56:04,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:56:04,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:56:04,995 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:56:04,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:56:04,995 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:56:04,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:56:04,996 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:56:04,996 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:56:04,996 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_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1baae56bade188786b6c048f5a5545dd6165460ea50e58a0310e4360c89d1838 [2023-12-02 16:56:05,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:56:05,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:56:05,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:56:05,243 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:56:05,243 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:56:05,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i [2023-12-02 16:56:08,031 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:56:08,436 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:56:08,437 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i [2023-12-02 16:56:08,475 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/data/a92eaa716/fb0c8a9143ed4aa994bb864c156194df/FLAG95a17c6e5 [2023-12-02 16:56:08,491 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/data/a92eaa716/fb0c8a9143ed4aa994bb864c156194df [2023-12-02 16:56:08,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:56:08,495 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:56:08,497 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:56:08,497 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:56:08,502 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:56:08,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:56:08" (1/1) ... [2023-12-02 16:56:08,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@594ff272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:08, skipping insertion in model container [2023-12-02 16:56:08,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:56:08" (1/1) ... [2023-12-02 16:56:08,624 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:56:08,881 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_8894ac6c-9eb6-4314-8134-0f56b85953f3/sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i[4497,4510] [2023-12-02 16:56:08,889 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_8894ac6c-9eb6-4314-8134-0f56b85953f3/sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i[4557,4570] [2023-12-02 16:56:09,698 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:09,699 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:09,700 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:09,701 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:09,702 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:09,716 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:09,717 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:09,719 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:09,719 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,120 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 16:56:10,121 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 16:56:10,121 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 16:56:10,122 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 16:56:10,123 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 16:56:10,124 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 16:56:10,124 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 16:56:10,125 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 16:56:10,125 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 16:56:10,125 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 16:56:10,328 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,329 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:56:10,498 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:56:10,513 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_8894ac6c-9eb6-4314-8134-0f56b85953f3/sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i[4497,4510] [2023-12-02 16:56:10,514 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_8894ac6c-9eb6-4314-8134-0f56b85953f3/sv-benchmarks/c/aws-c-common/aws_priority_queue_size_harness.i[4557,4570] [2023-12-02 16:56:10,562 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,562 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,563 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,563 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,564 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,571 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,572 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,573 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,573 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,609 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 16:56:10,610 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 16:56:10,611 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 16:56:10,612 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 16:56:10,613 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 16:56:10,614 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 16:56:10,615 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 16:56:10,615 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 16:56:10,616 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 16:56:10,616 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 16:56:10,644 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,645 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 16:56:10,651 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-12-02 16:56:10,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:56:10,893 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,894 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,894 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,894 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,894 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,894 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,895 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,895 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,895 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,895 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,895 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,895 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,896 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,896 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,896 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:56:10,904 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:56:10,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10 WrapperNode [2023-12-02 16:56:10,905 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:56:10,906 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:56:10,906 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:56:10,906 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:56:10,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:10,979 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:11,097 INFO L138 Inliner]: procedures = 688, calls = 1532, calls flagged for inlining = 55, calls inlined = 10, statements flattened = 666 [2023-12-02 16:56:11,098 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:56:11,099 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:56:11,099 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:56:11,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:56:11,109 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:11,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:11,118 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:11,118 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:11,158 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:11,163 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:11,171 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:11,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:11,189 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:56:11,190 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:56:11,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:56:11,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:56:11,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (1/1) ... [2023-12-02 16:56:11,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:56:11,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:56:11,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:56:11,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:56:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-12-02 16:56:11,261 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-12-02 16:56:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:56:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-12-02 16:56:11,262 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-12-02 16:56:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-12-02 16:56:11,262 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-12-02 16:56:11,262 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 16:56:11,263 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 16:56:11,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 16:56:11,263 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-12-02 16:56:11,263 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-12-02 16:56:11,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:56:11,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:56:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:56:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:56:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2023-12-02 16:56:11,264 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2023-12-02 16:56:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 16:56:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:56:11,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:56:11,265 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 16:56:11,265 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 16:56:11,265 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-12-02 16:56:11,265 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-12-02 16:56:11,266 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-12-02 16:56:11,266 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-12-02 16:56:11,266 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-12-02 16:56:11,266 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-12-02 16:56:11,266 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-12-02 16:56:11,266 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-12-02 16:56:11,266 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 16:56:11,267 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 16:56:11,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 16:56:11,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 16:56:11,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 16:56:11,267 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 16:56:11,267 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 16:56:11,267 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-12-02 16:56:11,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-12-02 16:56:11,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 16:56:11,268 INFO L130 BoogieDeclarations]: Found specification of procedure assert_array_list_equivalence [2023-12-02 16:56:11,268 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_array_list_equivalence [2023-12-02 16:56:11,268 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-12-02 16:56:11,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-12-02 16:56:11,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:56:11,531 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:56:11,534 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:56:12,330 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:56:12,558 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:56:12,558 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:56:12,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:56:12 BoogieIcfgContainer [2023-12-02 16:56:12,560 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:56:12,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:56:12,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:56:12,565 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:56:12,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:56:08" (1/3) ... [2023-12-02 16:56:12,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf3ce73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:56:12, skipping insertion in model container [2023-12-02 16:56:12,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:56:10" (2/3) ... [2023-12-02 16:56:12,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf3ce73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:56:12, skipping insertion in model container [2023-12-02 16:56:12,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:56:12" (3/3) ... [2023-12-02 16:56:12,568 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_size_harness.i [2023-12-02 16:56:12,587 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:56:12,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:56:12,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:56:12,647 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;@22ce251d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:56:12,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:56:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-12-02 16:56:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 16:56:12,666 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:56:12,667 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 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] [2023-12-02 16:56:12,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:56:12,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:56:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1784309578, now seen corresponding path program 1 times [2023-12-02 16:56:12,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:56:12,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991532061] [2023-12-02 16:56:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:12,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:56:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:56:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 16:56:13,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:56:13,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991532061] [2023-12-02 16:56:13,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991532061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:56:13,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:56:13,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:56:13,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629057421] [2023-12-02 16:56:13,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:56:13,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:56:13,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:56:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:56:13,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:56:13,539 INFO L87 Difference]: Start difference. First operand has 134 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 16:56:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:56:13,886 INFO L93 Difference]: Finished difference Result 234 states and 308 transitions. [2023-12-02 16:56:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:56:13,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 85 [2023-12-02 16:56:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:56:13,898 INFO L225 Difference]: With dead ends: 234 [2023-12-02 16:56:13,898 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 16:56:13,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:56:13,906 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 18 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:56:13,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 518 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:56:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 16:56:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-12-02 16:56:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 76 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-12-02 16:56:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2023-12-02 16:56:13,957 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 85 [2023-12-02 16:56:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:56:13,959 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2023-12-02 16:56:13,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 16:56:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2023-12-02 16:56:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 16:56:13,964 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:56:13,965 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 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] [2023-12-02 16:56:13,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:56:13,965 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:56:13,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:56:13,966 INFO L85 PathProgramCache]: Analyzing trace with hash -70641876, now seen corresponding path program 1 times [2023-12-02 16:56:13,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:56:13,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524225215] [2023-12-02 16:56:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:13,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:56:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:56:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 16:56:14,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:56:14,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524225215] [2023-12-02 16:56:14,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524225215] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:56:14,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241444218] [2023-12-02 16:56:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:14,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:14,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:56:14,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:56:14,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:56:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:56:15,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 2314 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:56:15,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:56:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 16:56:15,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:56:15,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241444218] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:56:15,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:56:15,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 16:56:15,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760129019] [2023-12-02 16:56:15,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:56:15,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:56:15,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:56:15,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:56:15,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:56:15,280 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 16:56:15,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:56:15,749 INFO L93 Difference]: Finished difference Result 241 states and 307 transitions. [2023-12-02 16:56:15,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:56:15,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 93 [2023-12-02 16:56:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:56:15,754 INFO L225 Difference]: With dead ends: 241 [2023-12-02 16:56:15,754 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 16:56:15,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-12-02 16:56:15,757 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 32 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:56:15,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 762 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:56:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 16:56:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-12-02 16:56:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2023-12-02 16:56:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 169 transitions. [2023-12-02 16:56:15,775 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 169 transitions. Word has length 93 [2023-12-02 16:56:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:56:15,776 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 169 transitions. [2023-12-02 16:56:15,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 16:56:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 169 transitions. [2023-12-02 16:56:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 16:56:15,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:56:15,779 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 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] [2023-12-02 16:56:15,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:56:15,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:15,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:56:15,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:56:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1746276187, now seen corresponding path program 1 times [2023-12-02 16:56:15,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:56:15,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874542053] [2023-12-02 16:56:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:15,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:56:16,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:56:16,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006869894] [2023-12-02 16:56:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:16,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:16,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:56:16,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:56:16,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:56:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:56:16,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:56:16,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:56:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 16:56:16,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:56:16,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:56:16,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874542053] [2023-12-02 16:56:16,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:56:16,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006869894] [2023-12-02 16:56:16,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006869894] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:56:16,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:56:16,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:56:16,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239478915] [2023-12-02 16:56:16,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:56:16,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:56:16,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:56:16,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:56:16,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:56:16,703 INFO L87 Difference]: Start difference. First operand 134 states and 169 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 16:56:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:56:17,167 INFO L93 Difference]: Finished difference Result 235 states and 297 transitions. [2023-12-02 16:56:17,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:56:17,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 102 [2023-12-02 16:56:17,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:56:17,172 INFO L225 Difference]: With dead ends: 235 [2023-12-02 16:56:17,172 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 16:56:17,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:56:17,174 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 24 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:56:17,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 633 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:56:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 16:56:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-12-02 16:56:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 78 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2023-12-02 16:56:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 168 transitions. [2023-12-02 16:56:17,193 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 168 transitions. Word has length 102 [2023-12-02 16:56:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:56:17,194 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 168 transitions. [2023-12-02 16:56:17,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 16:56:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 168 transitions. [2023-12-02 16:56:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 16:56:17,197 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:56:17,197 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 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] [2023-12-02 16:56:17,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:56:17,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:17,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:56:17,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:56:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1162746788, now seen corresponding path program 1 times [2023-12-02 16:56:17,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:56:17,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854479634] [2023-12-02 16:56:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:56:17,518 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:56:17,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366669698] [2023-12-02 16:56:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:17,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:17,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:56:17,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:56:17,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:56:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:56:18,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:56:18,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:56:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 16:56:18,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:56:18,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:56:18,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854479634] [2023-12-02 16:56:18,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:56:18,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366669698] [2023-12-02 16:56:18,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366669698] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:56:18,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:56:18,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:56:18,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479496945] [2023-12-02 16:56:18,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:56:18,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:56:18,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:56:18,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:56:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:56:18,141 INFO L87 Difference]: Start difference. First operand 134 states and 168 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-12-02 16:56:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:56:18,657 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2023-12-02 16:56:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:56:18,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 110 [2023-12-02 16:56:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:56:18,660 INFO L225 Difference]: With dead ends: 240 [2023-12-02 16:56:18,660 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 16:56:18,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:56:18,662 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 38 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:56:18,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 854 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:56:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 16:56:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-12-02 16:56:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 78 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2023-12-02 16:56:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 167 transitions. [2023-12-02 16:56:18,677 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 167 transitions. Word has length 110 [2023-12-02 16:56:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:56:18,678 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 167 transitions. [2023-12-02 16:56:18,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-12-02 16:56:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 167 transitions. [2023-12-02 16:56:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 16:56:18,681 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:56:18,681 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 16:56:18,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:56:18,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:18,885 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:56:18,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:56:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash 556724761, now seen corresponding path program 2 times [2023-12-02 16:56:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:56:18,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681236471] [2023-12-02 16:56:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:18,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:56:18,967 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:56:18,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275057505] [2023-12-02 16:56:18,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:56:18,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:18,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:56:18,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:56:18,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:56:19,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:56:19,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:56:19,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:56:19,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:56:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 16:56:19,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:56:19,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:56:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681236471] [2023-12-02 16:56:19,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:56:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275057505] [2023-12-02 16:56:19,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275057505] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:56:19,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:56:19,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:56:19,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523681639] [2023-12-02 16:56:19,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:56:19,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:56:19,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:56:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:56:19,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:56:19,654 INFO L87 Difference]: Start difference. First operand 134 states and 167 transitions. Second operand has 5 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-02 16:56:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:56:19,963 INFO L93 Difference]: Finished difference Result 213 states and 264 transitions. [2023-12-02 16:56:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:56:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 119 [2023-12-02 16:56:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:56:19,965 INFO L225 Difference]: With dead ends: 213 [2023-12-02 16:56:19,965 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 16:56:19,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:56:19,967 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 0 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:56:19,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 539 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:56:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 16:56:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-12-02 16:56:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 78 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 18 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2023-12-02 16:56:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2023-12-02 16:56:19,979 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 119 [2023-12-02 16:56:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:56:19,980 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2023-12-02 16:56:19,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 16.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-02 16:56:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2023-12-02 16:56:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 16:56:19,982 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:56:19,982 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 16:56:19,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:56:20,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:20,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:56:20,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:56:20,185 INFO L85 PathProgramCache]: Analyzing trace with hash -752434502, now seen corresponding path program 3 times [2023-12-02 16:56:20,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:56:20,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820722255] [2023-12-02 16:56:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:20,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:56:20,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:56:20,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281469164] [2023-12-02 16:56:20,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:56:20,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:20,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:56:20,297 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:56:20,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:56:20,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:56:20,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:56:20,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:56:20,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:56:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-02 16:56:20,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:56:20,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:56:20,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820722255] [2023-12-02 16:56:20,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:56:20,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281469164] [2023-12-02 16:56:20,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281469164] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:56:20,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:56:20,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:56:20,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347207824] [2023-12-02 16:56:20,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:56:20,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:56:20,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:56:20,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:56:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:56:20,993 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-02 16:56:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:56:21,408 INFO L93 Difference]: Finished difference Result 210 states and 257 transitions. [2023-12-02 16:56:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:56:21,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 128 [2023-12-02 16:56:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:56:21,410 INFO L225 Difference]: With dead ends: 210 [2023-12-02 16:56:21,410 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 16:56:21,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:56:21,412 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 13 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:56:21,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 888 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:56:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 16:56:21,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-12-02 16:56:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2023-12-02 16:56:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2023-12-02 16:56:21,424 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 128 [2023-12-02 16:56:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:56:21,425 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2023-12-02 16:56:21,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-02 16:56:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2023-12-02 16:56:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 16:56:21,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:56:21,428 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-12-02 16:56:21,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:56:21,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:21,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:56:21,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:56:21,641 INFO L85 PathProgramCache]: Analyzing trace with hash -735476673, now seen corresponding path program 1 times [2023-12-02 16:56:21,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:56:21,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173319306] [2023-12-02 16:56:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:21,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:56:21,754 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:56:21,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299172628] [2023-12-02 16:56:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:56:21,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:56:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:56:21,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:56:21,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8894ac6c-9eb6-4314-8134-0f56b85953f3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:56:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:56:22,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 2896 conjuncts, 149 conjunts are in the unsatisfiable core [2023-12-02 16:56:22,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:56:22,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 16:56:23,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:56:23,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-12-02 16:56:25,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-12-02 16:56:53,780 INFO L349 Elim1Store]: treesize reduction 71, result has 15.5 percent of original size [2023-12-02 16:56:53,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 82 [2023-12-02 16:56:53,841 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-12-02 16:56:53,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2023-12-02 16:57:13,992 INFO L349 Elim1Store]: treesize reduction 12, result has 80.3 percent of original size [2023-12-02 16:57:13,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 92 [2023-12-02 16:57:14,093 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2023-12-02 16:57:14,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 67 [2023-12-02 16:57:14,181 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2023-12-02 16:57:14,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 59 [2023-12-02 16:57:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 81 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:57:14,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:57:16,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:16,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173319306] [2023-12-02 16:57:16,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:57:16,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299172628] [2023-12-02 16:57:16,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299172628] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:57:16,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [783006937] [2023-12-02 16:57:16,218 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2023-12-02 16:57:16,218 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:57:16,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:57:16,227 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:57:16,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:02:12,854 INFO L197 IcfgInterpreter]: Interpreting procedure aws_array_list_length with input of size 62 for LOIs [2023-12-02 17:02:14,057 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:02:14,073 INFO L197 IcfgInterpreter]: Interpreting procedure aws_array_list_is_bounded with input of size 2235 for LOIs [2023-12-02 17:03:09,123 INFO L197 IcfgInterpreter]: Interpreting procedure save_byte_from_array with input of size 40 for LOIs [2023-12-02 17:03:09,154 INFO L197 IcfgInterpreter]: Interpreting procedure aws_priority_queue_is_valid with input of size 92 for LOIs [2023-12-02 17:03:12,128 INFO L197 IcfgInterpreter]: Interpreting procedure aws_array_list_is_valid with input of size 101 for LOIs [2023-12-02 17:03:12,869 INFO L197 IcfgInterpreter]: Interpreting procedure aws_mul_size_checked with input of size 151 for LOIs [2023-12-02 17:03:13,728 INFO L197 IcfgInterpreter]: Interpreting procedure __CPROVER_overflow_mult with input of size 139 for LOIs [2023-12-02 17:03:13,800 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_array_list_has_allocated_data_member with input of size 217 for LOIs [2023-12-02 17:03:16,049 INFO L197 IcfgInterpreter]: Interpreting procedure can_fail_allocator with input of size 38 for LOIs [2023-12-02 17:03:16,055 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 246 for LOIs [2023-12-02 17:03:16,417 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:04:32,687 WARN L293 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 2154 DAG size of output: 2152 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)