./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:59:27,270 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:59:27,388 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:59:27,395 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:59:27,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:59:27,435 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:59:27,435 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:59:27,436 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:59:27,437 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:59:27,442 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:59:27,442 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:59:27,444 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:59:27,444 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:59:27,446 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:59:27,446 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:59:27,447 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:59:27,447 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:59:27,447 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:59:27,448 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:59:27,448 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:59:27,449 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:59:27,449 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:59:27,450 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:59:27,451 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:59:27,451 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:59:27,452 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:59:27,452 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:59:27,453 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:59:27,453 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:59:27,453 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:59:27,455 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:59:27,455 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:59:27,455 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:59:27,456 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:27,456 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:59:27,456 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:59:27,456 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:59:27,457 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:59:27,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:59:27,457 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:59:27,457 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:59:27,458 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:59:27,458 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_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2023-11-12 00:59:27,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:59:27,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:59:27,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:59:27,833 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:59:27,834 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:59:27,835 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2023-11-12 00:59:30,868 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:59:31,444 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:59:31,446 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2023-11-12 00:59:31,492 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/data/52bcff1b8/7d98b31769f24b20a34c6a053b90c248/FLAG5e83344f0 [2023-11-12 00:59:31,510 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/data/52bcff1b8/7d98b31769f24b20a34c6a053b90c248 [2023-11-12 00:59:31,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:59:31,518 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:59:31,521 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:31,521 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:59:31,527 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:59:31,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:31" (1/1) ... [2023-11-12 00:59:31,528 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1291cc91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:31, skipping insertion in model container [2023-11-12 00:59:31,529 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:31" (1/1) ... [2023-11-12 00:59:31,677 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:59:31,997 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_b781e482-74dc-4c90-b158-3a6c3ff70876/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2023-11-12 00:59:32,006 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_b781e482-74dc-4c90-b158-3a6c3ff70876/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2023-11-12 00:59:33,094 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,095 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,096 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,097 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,099 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,115 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,116 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,118 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,119 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,558 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:59:33,559 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:59:33,560 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:59:33,562 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:59:33,564 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:59:33,565 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:59:33,566 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:59:33,567 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:59:33,568 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:59:33,569 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:59:33,768 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,769 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:33,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:34,026 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:59:34,051 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_b781e482-74dc-4c90-b158-3a6c3ff70876/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2023-11-12 00:59:34,052 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_b781e482-74dc-4c90-b158-3a6c3ff70876/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2023-11-12 00:59:34,137 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,146 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,147 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,147 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,148 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,161 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,162 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,163 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,164 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,212 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:59:34,214 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:59:34,215 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:59:34,217 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:59:34,220 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:59:34,221 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:59:34,222 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:59:34,223 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:59:34,224 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:59:34,224 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:59:34,273 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,274 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:59:34,286 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7703-7714] [2023-11-12 00:59:34,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:59:34,661 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,661 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,661 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,661 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,661 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,662 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,662 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,663 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,663 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,663 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,663 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,663 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,664 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,665 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,665 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:59:34,673 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:59:34,675 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34 WrapperNode [2023-11-12 00:59:34,675 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:59:34,676 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:34,676 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:59:34,677 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:59:34,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,796 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,908 INFO L138 Inliner]: procedures = 688, calls = 1498, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 596 [2023-11-12 00:59:34,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:59:34,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:59:34,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:59:34,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:59:34,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,934 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:34,997 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:35,003 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:35,011 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:35,017 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:35,028 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:59:35,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:59:35,029 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:59:35,029 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:59:35,030 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (1/1) ... [2023-11-12 00:59:35,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:59:35,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:35,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:59:35,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:59:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-12 00:59:35,131 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-12 00:59:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:59:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-12 00:59:35,133 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-12 00:59:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-12 00:59:35,134 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-12 00:59:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:59:35,134 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:59:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:59:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:59:35,135 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:59:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:59:35,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:59:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:59:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:59:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:59:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:59:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:59:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2023-11-12 00:59:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2023-11-12 00:59:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:59:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:59:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 00:59:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 00:59:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-12 00:59:35,138 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-12 00:59:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-12 00:59:35,139 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-12 00:59:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:59:35,139 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:59:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:59:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:59:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:59:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 00:59:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 00:59:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 00:59:35,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 00:59:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:59:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-12 00:59:35,142 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-12 00:59:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-12 00:59:35,142 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-12 00:59:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-12 00:59:35,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-12 00:59:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:59:35,497 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:59:35,502 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:59:36,644 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:36,916 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:36,917 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 00:59:36,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:36 BoogieIcfgContainer [2023-11-12 00:59:36,920 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:36,922 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:36,922 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:36,926 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:36,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:31" (1/3) ... [2023-11-12 00:59:36,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66852fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:36, skipping insertion in model container [2023-11-12 00:59:36,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:34" (2/3) ... [2023-11-12 00:59:36,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66852fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:36, skipping insertion in model container [2023-11-12 00:59:36,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:36" (3/3) ... [2023-11-12 00:59:36,929 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2023-11-12 00:59:36,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:36,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:59:37,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:37,015 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;@7393667b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:37,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:59:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 74 states have internal predecessors, (90), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-12 00:59:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-12 00:59:37,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:37,040 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 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] [2023-11-12 00:59:37,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:37,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:37,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1843330265, now seen corresponding path program 1 times [2023-11-12 00:59:37,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:37,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5322784] [2023-11-12 00:59:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:37,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 00:59:37,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:37,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5322784] [2023-11-12 00:59:37,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5322784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:37,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:37,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:59:37,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475322497] [2023-11-12 00:59:37,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:37,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:59:37,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:37,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:59:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:59:37,891 INFO L87 Difference]: Start difference. First operand has 126 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 74 states have internal predecessors, (90), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 00:59:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:38,085 INFO L93 Difference]: Finished difference Result 199 states and 255 transitions. [2023-11-12 00:59:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:59:38,088 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2023-11-12 00:59:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:38,098 INFO L225 Difference]: With dead ends: 199 [2023-11-12 00:59:38,098 INFO L226 Difference]: Without dead ends: 124 [2023-11-12 00:59:38,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:59:38,106 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:38,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-12 00:59:38,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-12 00:59:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 73 states have internal predecessors, (86), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 00:59:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2023-11-12 00:59:38,162 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 82 [2023-11-12 00:59:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:38,164 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2023-11-12 00:59:38,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 00:59:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2023-11-12 00:59:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-12 00:59:38,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:38,171 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 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] [2023-11-12 00:59:38,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:59:38,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:38,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:38,173 INFO L85 PathProgramCache]: Analyzing trace with hash 41466287, now seen corresponding path program 1 times [2023-11-12 00:59:38,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:38,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719564275] [2023-11-12 00:59:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:38,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-12 00:59:38,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:38,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719564275] [2023-11-12 00:59:38,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719564275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:38,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:38,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:38,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564819441] [2023-11-12 00:59:38,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:38,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:38,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:38,941 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 00:59:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:39,432 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2023-11-12 00:59:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:59:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 95 [2023-11-12 00:59:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:39,436 INFO L225 Difference]: With dead ends: 200 [2023-11-12 00:59:39,437 INFO L226 Difference]: Without dead ends: 124 [2023-11-12 00:59:39,438 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 [2023-11-12 00:59:39,440 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 18 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:39,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 473 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:59:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-12 00:59:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-12 00:59:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 73 states have internal predecessors, (85), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 00:59:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 154 transitions. [2023-11-12 00:59:39,460 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 154 transitions. Word has length 95 [2023-11-12 00:59:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:39,461 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 154 transitions. [2023-11-12 00:59:39,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 00:59:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 154 transitions. [2023-11-12 00:59:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:59:39,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:39,466 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:39,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:59:39,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:39,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:39,467 INFO L85 PathProgramCache]: Analyzing trace with hash 718208605, now seen corresponding path program 1 times [2023-11-12 00:59:39,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:39,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924039768] [2023-11-12 00:59:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:39,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-12 00:59:40,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:40,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924039768] [2023-11-12 00:59:40,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924039768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:40,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:40,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:59:40,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698202398] [2023-11-12 00:59:40,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:40,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:59:40,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:59:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:40,269 INFO L87 Difference]: Start difference. First operand 124 states and 154 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-12 00:59:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:41,038 INFO L93 Difference]: Finished difference Result 211 states and 265 transitions. [2023-11-12 00:59:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:59:41,039 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 103 [2023-11-12 00:59:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:41,043 INFO L225 Difference]: With dead ends: 211 [2023-11-12 00:59:41,043 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 00:59:41,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:59:41,046 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 43 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:41,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 820 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:59:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 00:59:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-12 00:59:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 75 states have internal predecessors, (86), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-11-12 00:59:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 157 transitions. [2023-11-12 00:59:41,066 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 157 transitions. Word has length 103 [2023-11-12 00:59:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:41,066 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 157 transitions. [2023-11-12 00:59:41,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-12 00:59:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2023-11-12 00:59:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-12 00:59:41,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:41,070 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:41,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:59:41,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:41,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2075684737, now seen corresponding path program 1 times [2023-11-12 00:59:41,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:41,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906955973] [2023-11-12 00:59:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:41,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:41,210 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:41,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069655599] [2023-11-12 00:59:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:41,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:41,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:41,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:41,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 2385 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:59:41,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:59:41,983 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:41,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:41,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906955973] [2023-11-12 00:59:41,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:41,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069655599] [2023-11-12 00:59:41,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069655599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:41,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:41,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:41,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378700343] [2023-11-12 00:59:41,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:41,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:41,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:41,988 INFO L87 Difference]: Start difference. First operand 126 states and 157 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-12 00:59:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:42,622 INFO L93 Difference]: Finished difference Result 205 states and 253 transitions. [2023-11-12 00:59:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:59:42,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 112 [2023-11-12 00:59:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:42,624 INFO L225 Difference]: With dead ends: 205 [2023-11-12 00:59:42,625 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 00:59:42,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:42,626 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 24 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:42,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 582 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:59:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 00:59:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-12 00:59:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 75 states have internal predecessors, (85), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2023-11-12 00:59:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 156 transitions. [2023-11-12 00:59:42,642 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 156 transitions. Word has length 112 [2023-11-12 00:59:42,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:42,643 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 156 transitions. [2023-11-12 00:59:42,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-12 00:59:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 156 transitions. [2023-11-12 00:59:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-12 00:59:42,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:42,646 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:42,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:59:42,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:42,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:42,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:42,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1715671602, now seen corresponding path program 1 times [2023-11-12 00:59:42,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:42,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966917597] [2023-11-12 00:59:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:42,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:42,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:42,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367081570] [2023-11-12 00:59:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:42,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:42,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:42,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:42,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:43,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 2439 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:59:43,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 00:59:43,683 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:43,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:43,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966917597] [2023-11-12 00:59:43,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:43,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367081570] [2023-11-12 00:59:43,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367081570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:43,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:43,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 00:59:43,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863331379] [2023-11-12 00:59:43,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:43,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:59:43,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:59:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:43,686 INFO L87 Difference]: Start difference. First operand 126 states and 156 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-12 00:59:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:44,488 INFO L93 Difference]: Finished difference Result 210 states and 259 transitions. [2023-11-12 00:59:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:59:44,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 120 [2023-11-12 00:59:44,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:44,492 INFO L225 Difference]: With dead ends: 210 [2023-11-12 00:59:44,492 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 00:59:44,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:59:44,494 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 38 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:44,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 792 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:59:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 00:59:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-12 00:59:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 75 states have internal predecessors, (85), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2023-11-12 00:59:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2023-11-12 00:59:44,524 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 120 [2023-11-12 00:59:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:44,524 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2023-11-12 00:59:44,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-12 00:59:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2023-11-12 00:59:44,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-12 00:59:44,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:44,533 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:44,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:44,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:44,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:44,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:44,745 INFO L85 PathProgramCache]: Analyzing trace with hash -893847612, now seen corresponding path program 1 times [2023-11-12 00:59:44,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:44,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790541180] [2023-11-12 00:59:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:44,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:44,860 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:44,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431118708] [2023-11-12 00:59:44,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:44,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:44,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:44,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:44,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:59:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:45,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 00:59:45,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-12 00:59:45,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-12 00:59:46,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:46,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790541180] [2023-11-12 00:59:46,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:46,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431118708] [2023-11-12 00:59:46,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431118708] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:46,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:46,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-12 00:59:46,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948332165] [2023-11-12 00:59:46,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:46,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:46,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:46,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:46,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:59:46,029 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-12 00:59:46,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:46,468 INFO L93 Difference]: Finished difference Result 136 states and 169 transitions. [2023-11-12 00:59:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:59:46,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 129 [2023-11-12 00:59:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:46,471 INFO L225 Difference]: With dead ends: 136 [2023-11-12 00:59:46,471 INFO L226 Difference]: Without dead ends: 134 [2023-11-12 00:59:46,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:59:46,472 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 6 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:46,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 636 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:59:46,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-12 00:59:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2023-11-12 00:59:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 80 states have internal predecessors, (89), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-12 00:59:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 166 transitions. [2023-11-12 00:59:46,489 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 166 transitions. Word has length 129 [2023-11-12 00:59:46,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:46,489 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 166 transitions. [2023-11-12 00:59:46,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-12 00:59:46,490 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 166 transitions. [2023-11-12 00:59:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-12 00:59:46,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:46,493 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:46,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:46,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:46,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:46,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash -456442578, now seen corresponding path program 1 times [2023-11-12 00:59:46,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:46,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860373003] [2023-11-12 00:59:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:46,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:46,807 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:46,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909730784] [2023-11-12 00:59:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:46,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:46,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:46,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:46,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:59:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:47,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 2574 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 00:59:47,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-12 00:59:47,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:47,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:47,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860373003] [2023-11-12 00:59:47,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:47,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909730784] [2023-11-12 00:59:47,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909730784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:47,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:47,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:47,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541235343] [2023-11-12 00:59:47,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:47,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:47,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:47,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:47,587 INFO L87 Difference]: Start difference. First operand 133 states and 166 transitions. Second operand has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-12 00:59:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:48,453 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2023-11-12 00:59:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:48,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 130 [2023-11-12 00:59:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:48,456 INFO L225 Difference]: With dead ends: 217 [2023-11-12 00:59:48,456 INFO L226 Difference]: Without dead ends: 133 [2023-11-12 00:59:48,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:59:48,457 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 8 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:48,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 625 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:59:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-12 00:59:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-11-12 00:59:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 80 states have internal predecessors, (88), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-12 00:59:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 165 transitions. [2023-11-12 00:59:48,471 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 165 transitions. Word has length 130 [2023-11-12 00:59:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:48,472 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 165 transitions. [2023-11-12 00:59:48,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-12 00:59:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 165 transitions. [2023-11-12 00:59:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-12 00:59:48,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:48,475 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:48,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:48,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:48,687 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:48,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1128999206, now seen corresponding path program 1 times [2023-11-12 00:59:48,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:48,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173465530] [2023-11-12 00:59:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:48,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:48,801 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:48,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471649458] [2023-11-12 00:59:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:48,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:48,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:48,803 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:48,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:59:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:49,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 2581 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 00:59:49,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-12 00:59:49,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:49,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:49,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173465530] [2023-11-12 00:59:49,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:49,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471649458] [2023-11-12 00:59:49,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471649458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:49,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:49,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:59:49,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210345993] [2023-11-12 00:59:49,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:49,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:59:49,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:49,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:59:49,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:49,552 INFO L87 Difference]: Start difference. First operand 133 states and 165 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-12 00:59:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:50,158 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2023-11-12 00:59:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:59:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 131 [2023-11-12 00:59:50,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:50,161 INFO L225 Difference]: With dead ends: 218 [2023-11-12 00:59:50,161 INFO L226 Difference]: Without dead ends: 134 [2023-11-12 00:59:50,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:50,163 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 8 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:50,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 749 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:59:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-12 00:59:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-11-12 00:59:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 77 states have (on average 1.155844155844156) internal successors, (89), 81 states have internal predecessors, (89), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-12 00:59:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2023-11-12 00:59:50,194 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 131 [2023-11-12 00:59:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:50,198 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2023-11-12 00:59:50,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-12 00:59:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2023-11-12 00:59:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-12 00:59:50,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:50,203 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:50,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:50,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:50,416 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:50,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash -632601316, now seen corresponding path program 1 times [2023-11-12 00:59:50,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:50,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841051381] [2023-11-12 00:59:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:50,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:50,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138148731] [2023-11-12 00:59:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:50,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:50,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:50,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:50,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:59:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:51,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 00:59:51,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 00:59:51,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:51,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:51,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841051381] [2023-11-12 00:59:51,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:51,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138148731] [2023-11-12 00:59:51,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138148731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:51,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:51,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:59:51,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153557836] [2023-11-12 00:59:51,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:51,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:59:51,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:59:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:59:51,233 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-12 00:59:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:51,675 INFO L93 Difference]: Finished difference Result 229 states and 292 transitions. [2023-11-12 00:59:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:59:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 132 [2023-11-12 00:59:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:51,678 INFO L225 Difference]: With dead ends: 229 [2023-11-12 00:59:51,678 INFO L226 Difference]: Without dead ends: 138 [2023-11-12 00:59:51,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:51,680 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 5 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:51,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 360 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:59:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-12 00:59:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2023-11-12 00:59:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 82 states have internal predecessors, (90), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-12 00:59:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 167 transitions. [2023-11-12 00:59:51,694 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 167 transitions. Word has length 132 [2023-11-12 00:59:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:51,694 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 167 transitions. [2023-11-12 00:59:51,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-12 00:59:51,695 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 167 transitions. [2023-11-12 00:59:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-12 00:59:51,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:51,697 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:51,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:51,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:51,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:51,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:51,910 INFO L85 PathProgramCache]: Analyzing trace with hash -175763818, now seen corresponding path program 1 times [2023-11-12 00:59:51,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:51,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022131918] [2023-11-12 00:59:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:51,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:52,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:52,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508008666] [2023-11-12 00:59:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:52,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:52,028 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:52,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:59:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:52,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:59:52,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 00:59:52,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:52,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:52,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022131918] [2023-11-12 00:59:52,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:59:52,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508008666] [2023-11-12 00:59:52,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508008666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:52,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:52,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:59:52,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100756495] [2023-11-12 00:59:52,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:52,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:59:52,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:52,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:59:52,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:59:52,975 INFO L87 Difference]: Start difference. First operand 135 states and 167 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-12 00:59:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:53,384 INFO L93 Difference]: Finished difference Result 223 states and 278 transitions. [2023-11-12 00:59:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:59:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 134 [2023-11-12 00:59:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:53,387 INFO L225 Difference]: With dead ends: 223 [2023-11-12 00:59:53,387 INFO L226 Difference]: Without dead ends: 141 [2023-11-12 00:59:53,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:53,389 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 4 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:53,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 516 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:59:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-12 00:59:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2023-11-12 00:59:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 80 states have (on average 1.15) internal successors, (92), 83 states have internal predecessors, (92), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 36 states have call predecessors, (41), 35 states have call successors, (41) [2023-11-12 00:59:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 169 transitions. [2023-11-12 00:59:53,400 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 169 transitions. Word has length 134 [2023-11-12 00:59:53,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:53,400 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 169 transitions. [2023-11-12 00:59:53,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-12 00:59:53,401 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 169 transitions. [2023-11-12 00:59:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-12 00:59:53,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:53,403 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:53,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:53,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:59:53,629 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:53,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:53,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1011971560, now seen corresponding path program 1 times [2023-11-12 00:59:53,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:53,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841468234] [2023-11-12 00:59:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:53,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:53,730 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:59:53,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873963188] [2023-11-12 00:59:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:53,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:53,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:53,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:53,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b781e482-74dc-4c90-b158-3a6c3ff70876/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:59:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:54,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 2610 conjuncts, 144 conjunts are in the unsatisfiable core [2023-11-12 00:59:54,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:54,616 INFO L351 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 [2023-11-12 00:59:55,348 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:59:55,349 INFO L351 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 [2023-11-12 00:59:57,487 INFO L351 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 [2023-11-12 01:00:00,144 WARN L876 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_int| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_int|)) is different from true [2023-11-12 01:00:00,155 WARN L876 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_int| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0))) |c_#memory_int|)) is different from true [2023-11-12 01:00:00,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:00:00,436 INFO L322 Elim1Store]: treesize reduction 77, result has 31.9 percent of original size [2023-11-12 01:00:00,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 103 [2023-11-12 01:00:00,468 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 01:00:00,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2023-11-12 01:00:00,500 INFO L351 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 12 treesize of output 11 [2023-11-12 01:00:00,539 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:00,540 INFO L351 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 12 treesize of output 1 [2023-11-12 01:00:00,560 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:00:00,561 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 25 [2023-11-12 01:00:00,694 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2023-11-12 01:00:00,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-11-12 01:00:11,347 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:00:11,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-11-12 01:00:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 24 proven. 25 refuted. 2 times theorem prover too weak. 18 trivial. 5 not checked. [2023-11-12 01:00:11,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-12 01:00:12,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:12,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841468234] [2023-11-12 01:00:12,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:12,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873963188] [2023-11-12 01:00:12,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873963188] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:12,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981606959] [2023-11-12 01:00:12,645 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2023-11-12 01:00:12,646 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:12,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:12,656 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:12,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs