./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_bytes_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_bytes_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash be41ee8ace02416f2e9952c11df8cb43e10a04c126211792ad12271f5624b8e0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:52:41,263 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:52:41,404 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-26 11:52:41,416 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:52:41,419 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:52:41,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:52:41,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:52:41,459 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:52:41,461 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:52:41,466 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:52:41,467 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:52:41,467 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:52:41,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:52:41,470 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:52:41,470 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:52:41,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:52:41,471 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:52:41,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:52:41,472 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:52:41,472 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:52:41,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:52:41,475 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:52:41,475 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:52:41,476 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:52:41,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:52:41,477 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:52:41,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:52:41,478 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:52:41,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:41,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:52:41,480 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:52:41,480 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:52:41,480 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:52:41,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:52:41,481 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:52:41,481 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:52:41,481 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:52:41,482 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:52:41,482 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:52:41,482 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be41ee8ace02416f2e9952c11df8cb43e10a04c126211792ad12271f5624b8e0 [2023-11-26 11:52:41,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:52:41,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:52:41,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:52:41,788 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:52:41,788 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:52:41,790 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/aws-c-common/aws_string_bytes_harness.i [2023-11-26 11:52:44,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:52:45,524 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:52:45,525 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/sv-benchmarks/c/aws-c-common/aws_string_bytes_harness.i [2023-11-26 11:52:45,565 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/data/0d4d71f18/cbc2d87d6b51472c9173d1a46dcb0a59/FLAGaf3934326 [2023-11-26 11:52:45,585 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/data/0d4d71f18/cbc2d87d6b51472c9173d1a46dcb0a59 [2023-11-26 11:52:45,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:52:45,594 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:52:45,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:45,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:52:45,609 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:52:45,609 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:45" (1/1) ... [2023-11-26 11:52:45,610 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73afdf78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:45, skipping insertion in model container [2023-11-26 11:52:45,611 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:45" (1/1) ... [2023-11-26 11:52:45,738 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:52:46,026 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_69dbf3b2-3957-4d53-bd43-3af9ef531596/sv-benchmarks/c/aws-c-common/aws_string_bytes_harness.i[4490,4503] [2023-11-26 11:52:46,035 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_69dbf3b2-3957-4d53-bd43-3af9ef531596/sv-benchmarks/c/aws-c-common/aws_string_bytes_harness.i[4550,4563] [2023-11-26 11:52:47,151 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,152 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,153 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,154 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,156 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,193 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,194 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,202 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,203 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,219 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,220 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,224 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,227 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:47,841 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 11:52:47,843 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 11:52:47,844 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 11:52:47,846 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 11:52:47,848 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 11:52:47,849 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 11:52:47,850 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 11:52:47,851 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 11:52:47,852 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 11:52:47,853 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 11:52:48,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:48,140 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:52:48,156 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_69dbf3b2-3957-4d53-bd43-3af9ef531596/sv-benchmarks/c/aws-c-common/aws_string_bytes_harness.i[4490,4503] [2023-11-26 11:52:48,157 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_69dbf3b2-3957-4d53-bd43-3af9ef531596/sv-benchmarks/c/aws-c-common/aws_string_bytes_harness.i[4550,4563] [2023-11-26 11:52:48,204 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,205 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,206 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,207 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,208 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,219 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,220 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,221 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,222 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,223 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,224 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,225 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,226 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-26 11:52:48,270 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-26 11:52:48,277 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-26 11:52:48,278 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-26 11:52:48,279 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-26 11:52:48,280 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-26 11:52:48,281 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-26 11:52:48,282 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-26 11:52:48,282 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-26 11:52:48,283 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-26 11:52:48,284 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-26 11:52:48,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:48,587 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,587 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,587 WARN L675 CHandler]: The function aws_last_error is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,587 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,588 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,588 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,588 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,588 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,588 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,588 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,588 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,589 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,589 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,589 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,589 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,589 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,589 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:52:48,598 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:52:48,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48 WrapperNode [2023-11-26 11:52:48,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:48,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:48,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:52:48,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:52:48,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,728 INFO L138 Inliner]: procedures = 678, calls = 973, calls flagged for inlining = 44, calls inlined = 6, statements flattened = 58 [2023-11-26 11:52:48,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:48,730 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:52:48,730 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:52:48,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:52:48,744 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,749 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,792 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 6, 5]. 46 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 3 writes are split as follows [0, 3, 0]. [2023-11-26 11:52:48,792 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,819 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,821 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,826 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,844 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,850 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:52:48,851 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:52:48,851 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:52:48,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:52:48,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (1/1) ... [2023-11-26 11:52:48,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:48,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:48,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:52:48,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69dbf3b2-3957-4d53-bd43-3af9ef531596/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:52:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-11-26 11:52:48,956 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-11-26 11:52:48,956 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-26 11:52:48,956 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-26 11:52:48,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:52:48,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:52:48,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:52:48,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 11:52:48,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 11:52:48,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:52:48,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:52:48,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:52:48,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:52:48,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:52:48,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:52:48,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:52:48,958 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-26 11:52:48,958 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-26 11:52:48,959 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_bytes [2023-11-26 11:52:48,959 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_bytes [2023-11-26 11:52:48,959 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:52:48,959 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:52:48,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 11:52:48,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 11:52:48,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 11:52:48,960 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-26 11:52:48,960 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-26 11:52:48,961 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-26 11:52:48,961 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-26 11:52:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:52:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:52:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:52:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:52:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:52:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:52:49,276 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:52:49,279 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:52:49,530 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:52:49,617 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:52:49,617 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 11:52:49,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:49 BoogieIcfgContainer [2023-11-26 11:52:49,618 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:52:49,621 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:52:49,621 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:52:49,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:52:49,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:52:45" (1/3) ... [2023-11-26 11:52:49,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7bf045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:49, skipping insertion in model container [2023-11-26 11:52:49,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:48" (2/3) ... [2023-11-26 11:52:49,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7bf045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:49, skipping insertion in model container [2023-11-26 11:52:49,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:49" (3/3) ... [2023-11-26 11:52:49,634 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_bytes_harness.i [2023-11-26 11:52:49,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:52:49,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:52:49,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:52:49,722 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=PETRI_NET, 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;@4dc08841, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:52:49,723 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:52:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-26 11:52:49,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-26 11:52:49,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:49,744 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:49,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:49,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:49,751 INFO L85 PathProgramCache]: Analyzing trace with hash -381922576, now seen corresponding path program 1 times [2023-11-26 11:52:49,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:49,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508456609] [2023-11-26 11:52:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:49,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:52:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:52:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:52:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:52:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:52:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 11:52:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:52:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:52:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:52:50,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:50,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508456609] [2023-11-26 11:52:50,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508456609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:50,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:50,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:50,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89492732] [2023-11-26 11:52:50,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:50,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:50,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:50,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:50,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:50,600 INFO L87 Difference]: Start difference. First operand has 50 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-26 11:52:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:50,777 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2023-11-26 11:52:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2023-11-26 11:52:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:50,789 INFO L225 Difference]: With dead ends: 94 [2023-11-26 11:52:50,789 INFO L226 Difference]: Without dead ends: 48 [2023-11-26 11:52:50,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:50,815 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:50,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-26 11:52:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-26 11:52:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:52:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-11-26 11:52:50,877 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 46 [2023-11-26 11:52:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:50,878 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-11-26 11:52:50,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-26 11:52:50,880 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-11-26 11:52:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-26 11:52:50,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:50,884 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:50,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:52:50,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:50,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:50,886 INFO L85 PathProgramCache]: Analyzing trace with hash -845631498, now seen corresponding path program 1 times [2023-11-26 11:52:50,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:50,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009122248] [2023-11-26 11:52:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:50,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:51,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:52:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:51,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-26 11:52:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:51,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-26 11:52:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:52,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:52:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:52,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:52:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:52,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-26 11:52:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:52,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:52:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:52,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:52:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:52:52,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:52,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009122248] [2023-11-26 11:52:52,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009122248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:52,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:52,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-26 11:52:52,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577198882] [2023-11-26 11:52:52,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:52,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:52:52,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:52:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:52:52,317 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 12 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-26 11:52:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:52,835 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-11-26 11:52:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:52:52,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 46 [2023-11-26 11:52:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:52,840 INFO L225 Difference]: With dead ends: 54 [2023-11-26 11:52:52,840 INFO L226 Difference]: Without dead ends: 50 [2023-11-26 11:52:52,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:52:52,842 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:52,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 180 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:52:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-26 11:52:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-26 11:52:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 11:52:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-11-26 11:52:52,861 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 46 [2023-11-26 11:52:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:52,865 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-11-26 11:52:52,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-26 11:52:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-11-26 11:52:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-26 11:52:52,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:52,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-26 11:52:52,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:52:52,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:52,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:52,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1118332550, now seen corresponding path program 1 times [2023-11-26 11:52:52,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:52,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782979555] [2023-11-26 11:52:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:52,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat