./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl --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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:15:20,111 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:15:20,180 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-12 02:15:20,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:15:20,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:15:20,213 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:15:20,214 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:15:20,215 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:15:20,216 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:15:20,216 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:15:20,217 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:15:20,218 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:15:20,219 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:15:20,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:15:20,220 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:15:20,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:15:20,221 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:15:20,222 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:15:20,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:15:20,223 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:15:20,224 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:15:20,225 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:15:20,225 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:15:20,226 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:15:20,226 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:15:20,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:20,228 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:15:20,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:15:20,229 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:15:20,229 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:15:20,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:15:20,230 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:15:20,231 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:15:20,231 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:15:20,231 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:15:20,231 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:15:20,232 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_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2023-11-12 02:15:20,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:15:20,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:15:20,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:15:20,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:15:20,631 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:15:20,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2023-11-12 02:15:23,875 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:15:24,526 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:15:24,527 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2023-11-12 02:15:24,569 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/data/f1cbbe5f1/68674955595844b9bf505f890d0fda83/FLAG0faf13e2d [2023-11-12 02:15:24,584 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/data/f1cbbe5f1/68674955595844b9bf505f890d0fda83 [2023-11-12 02:15:24,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:15:24,589 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:15:24,590 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:24,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:15:24,597 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:15:24,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:24" (1/1) ... [2023-11-12 02:15:24,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774e036e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:24, skipping insertion in model container [2023-11-12 02:15:24,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:24" (1/1) ... [2023-11-12 02:15:24,767 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:15:25,078 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_88a696b7-db0d-41cf-9ee5-a258c8d82d31/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2023-11-12 02:15:25,087 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_88a696b7-db0d-41cf-9ee5-a258c8d82d31/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2023-11-12 02:15:25,986 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:25,987 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:25,988 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:25,990 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:25,991 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,016 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,017 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,022 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,023 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,029 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,034 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,037 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,038 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,420 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 02:15:26,422 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 02:15:26,424 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 02:15:26,425 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 02:15:26,427 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 02:15:26,428 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 02:15:26,429 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 02:15:26,430 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 02:15:26,431 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 02:15:26,431 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 02:15:26,704 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:26,727 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:15:26,754 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_88a696b7-db0d-41cf-9ee5-a258c8d82d31/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2023-11-12 02:15:26,755 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_88a696b7-db0d-41cf-9ee5-a258c8d82d31/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2023-11-12 02:15:26,832 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,832 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,833 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,834 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,835 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,852 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,856 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,857 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,858 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,864 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,865 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,865 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,866 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:15:26,903 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 02:15:26,904 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 02:15:26,905 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 02:15:26,907 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 02:15:26,908 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 02:15:26,909 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 02:15:26,909 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 02:15:26,910 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 02:15:26,911 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 02:15:26,911 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 02:15:27,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:27,227 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,227 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,228 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,232 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,232 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,232 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,233 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,233 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,234 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,234 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,234 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,235 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,235 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,235 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,235 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,236 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:15:27,254 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:15:27,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27 WrapperNode [2023-11-12 02:15:27,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:27,260 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:27,261 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:15:27,261 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:15:27,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,390 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,452 INFO L138 Inliner]: procedures = 678, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2023-11-12 02:15:27,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:27,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:15:27,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:15:27,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:15:27,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,485 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,486 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,516 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,538 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,542 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,545 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,551 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:15:27,564 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:15:27,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:15:27,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:15:27,566 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (1/1) ... [2023-11-12 02:15:27,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:27,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:27,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:15:27,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:15:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:15:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:15:27,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:15:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-12 02:15:27,676 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-12 02:15:27,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:15:27,678 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2023-11-12 02:15:27,678 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2023-11-12 02:15:27,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:15:27,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:15:27,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:15:27,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:15:27,679 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:15:27,680 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:15:27,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:15:27,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:15:27,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 02:15:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 02:15:27,682 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 02:15:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:15:28,005 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:15:28,008 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:15:28,335 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:15:28,347 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:15:28,347 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:15:28,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:28 BoogieIcfgContainer [2023-11-12 02:15:28,350 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:15:28,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:15:28,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:15:28,362 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:15:28,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:15:24" (1/3) ... [2023-11-12 02:15:28,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7f0d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:15:28, skipping insertion in model container [2023-11-12 02:15:28,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:27" (2/3) ... [2023-11-12 02:15:28,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7f0d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:15:28, skipping insertion in model container [2023-11-12 02:15:28,364 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:15:28" (3/3) ... [2023-11-12 02:15:28,365 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2023-11-12 02:15:28,416 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:15:28,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:15:28,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:15:28,507 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;@4bff2727, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:15:28,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:15:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-12 02:15:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 02:15:28,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:28,528 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:15:28,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:28,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:28,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2023-11-12 02:15:28,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:28,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629289928] [2023-11-12 02:15:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:28,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:15:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:15:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:15:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-12 02:15:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-12 02:15:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:15:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:15:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 02:15:29,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:29,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629289928] [2023-11-12 02:15:29,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629289928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:29,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:15:29,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:15:29,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367751037] [2023-11-12 02:15:29,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:29,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:15:29,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:29,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:15:29,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:15:29,317 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 02:15:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:29,346 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2023-11-12 02:15:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:15:29,352 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2023-11-12 02:15:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:29,360 INFO L225 Difference]: With dead ends: 128 [2023-11-12 02:15:29,361 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 02:15:29,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 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 02:15:29,368 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:29,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:15:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 02:15:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-12 02:15:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-12 02:15:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2023-11-12 02:15:29,415 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2023-11-12 02:15:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:29,416 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2023-11-12 02:15:29,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 02:15:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2023-11-12 02:15:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 02:15:29,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:29,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:15:29,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:15:29,421 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:29,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:29,423 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2023-11-12 02:15:29,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:29,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620580705] [2023-11-12 02:15:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:29,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:15:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:15:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:29,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:15:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:30,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-12 02:15:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:30,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-12 02:15:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:30,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:15:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:30,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:15:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-12 02:15:30,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:30,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620580705] [2023-11-12 02:15:30,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620580705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:30,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615407174] [2023-11-12 02:15:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:30,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:30,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:30,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:30,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:15:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:30,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-12 02:15:30,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:30,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-12 02:15:30,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-11-12 02:15:30,798 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:15:30,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 28 [2023-11-12 02:15:30,816 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2023-11-12 02:15:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:15:31,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:31,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615407174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:31,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:15:31,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2023-11-12 02:15:31,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171111389] [2023-11-12 02:15:31,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:31,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:15:31,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:15:31,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:15:31,803 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:15:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:32,679 INFO L93 Difference]: Finished difference Result 168 states and 225 transitions. [2023-11-12 02:15:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:15:32,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2023-11-12 02:15:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:32,684 INFO L225 Difference]: With dead ends: 168 [2023-11-12 02:15:32,684 INFO L226 Difference]: Without dead ends: 119 [2023-11-12 02:15:32,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:15:32,687 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 76 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:32,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 369 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:15:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-12 02:15:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-11-12 02:15:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 82 states have (on average 1.329268292682927) internal successors, (109), 85 states have internal predecessors, (109), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-11-12 02:15:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2023-11-12 02:15:32,740 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 68 [2023-11-12 02:15:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:32,740 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2023-11-12 02:15:32,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:15:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2023-11-12 02:15:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 02:15:32,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:32,754 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:15:32,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:32,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:32,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:32,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:32,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1148591220, now seen corresponding path program 1 times [2023-11-12 02:15:32,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:32,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049909891] [2023-11-12 02:15:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:32,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:33,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:15:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:33,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:15:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:33,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:15:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:33,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-12 02:15:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:33,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-12 02:15:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:33,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:15:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:33,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:15:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-12 02:15:33,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:33,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049909891] [2023-11-12 02:15:33,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049909891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:33,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504458116] [2023-11-12 02:15:33,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:33,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:33,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:33,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:33,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:15:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:33,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-12 02:15:33,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:33,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-12 02:15:33,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:15:33,755 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-12 02:15:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:15:34,254 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:34,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504458116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:34,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:15:34,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2023-11-12 02:15:34,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311331508] [2023-11-12 02:15:34,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:34,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:15:34,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:15:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:15:34,258 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:15:36,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:15:38,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:15:40,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:15:42,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:15:43,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:43,369 INFO L93 Difference]: Finished difference Result 203 states and 285 transitions. [2023-11-12 02:15:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:15:43,370 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2023-11-12 02:15:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:43,373 INFO L225 Difference]: With dead ends: 203 [2023-11-12 02:15:43,374 INFO L226 Difference]: Without dead ends: 151 [2023-11-12 02:15:43,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:15:43,377 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 122 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 14 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:43,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 475 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 318 Invalid, 4 Unknown, 0 Unchecked, 8.9s Time] [2023-11-12 02:15:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-12 02:15:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2023-11-12 02:15:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 95 states have (on average 1.368421052631579) internal successors, (130), 98 states have internal predecessors, (130), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2023-11-12 02:15:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 180 transitions. [2023-11-12 02:15:43,430 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 180 transitions. Word has length 68 [2023-11-12 02:15:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:43,433 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 180 transitions. [2023-11-12 02:15:43,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:15:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 180 transitions. [2023-11-12 02:15:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 02:15:43,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:43,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:15:43,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:43,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:43,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:43,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:43,641 INFO L85 PathProgramCache]: Analyzing trace with hash 779681482, now seen corresponding path program 1 times [2023-11-12 02:15:43,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:43,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843648983] [2023-11-12 02:15:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:43,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:43,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:15:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:43,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:15:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:43,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:15:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:43,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-12 02:15:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-12 02:15:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:44,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:15:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:44,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:15:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-12 02:15:44,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:44,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843648983] [2023-11-12 02:15:44,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843648983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:44,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647275384] [2023-11-12 02:15:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:44,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:44,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:15:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:44,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-12 02:15:44,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:44,351 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 02:15:44,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-12 02:15:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:45,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:15:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:15:45,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647275384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:15:45,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:15:45,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 12] total 28 [2023-11-12 02:15:45,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884693992] [2023-11-12 02:15:45,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:15:45,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-12 02:15:45,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:45,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-12 02:15:45,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-11-12 02:15:45,958 INFO L87 Difference]: Start difference. First operand 131 states and 180 transitions. Second operand has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-12 02:15:48,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:15:50,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:15:52,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:15:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:54,164 INFO L93 Difference]: Finished difference Result 469 states and 708 transitions. [2023-11-12 02:15:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-12 02:15:54,165 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 68 [2023-11-12 02:15:54,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:54,172 INFO L225 Difference]: With dead ends: 469 [2023-11-12 02:15:54,172 INFO L226 Difference]: Without dead ends: 354 [2023-11-12 02:15:54,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=343, Invalid=2413, Unknown=0, NotChecked=0, Total=2756 [2023-11-12 02:15:54,190 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 308 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 69 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:54,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1355 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1042 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2023-11-12 02:15:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-12 02:15:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 287. [2023-11-12 02:15:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 209 states have (on average 1.3732057416267942) internal successors, (287), 218 states have internal predecessors, (287), 51 states have call successors, (51), 19 states have call predecessors, (51), 26 states have return successors, (76), 49 states have call predecessors, (76), 47 states have call successors, (76) [2023-11-12 02:15:54,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 414 transitions. [2023-11-12 02:15:54,277 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 414 transitions. Word has length 68 [2023-11-12 02:15:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:54,278 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 414 transitions. [2023-11-12 02:15:54,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-12 02:15:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 414 transitions. [2023-11-12 02:15:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 02:15:54,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:54,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:15:54,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:54,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:54,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:54,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2023-11-12 02:15:54,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:54,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549882492] [2023-11-12 02:15:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:54,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:54,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:15:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:54,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:15:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:54,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:15:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:54,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:15:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:54,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-12 02:15:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:54,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-12 02:15:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:54,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-12 02:15:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 02:15:55,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:55,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549882492] [2023-11-12 02:15:55,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549882492] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:55,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550341651] [2023-11-12 02:15:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:55,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:55,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:55,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:55,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:15:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:55,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:15:55,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:15:55,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550341651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:55,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:15:55,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2023-11-12 02:15:55,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091015125] [2023-11-12 02:15:55,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:55,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:15:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:55,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:15:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:15:55,329 INFO L87 Difference]: Start difference. First operand 287 states and 414 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 02:15:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:55,607 INFO L93 Difference]: Finished difference Result 577 states and 843 transitions. [2023-11-12 02:15:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:15:55,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2023-11-12 02:15:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:55,614 INFO L225 Difference]: With dead ends: 577 [2023-11-12 02:15:55,614 INFO L226 Difference]: Without dead ends: 308 [2023-11-12 02:15:55,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:15:55,618 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 99 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:55,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 247 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:15:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-12 02:15:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 298. [2023-11-12 02:15:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 217 states have (on average 1.359447004608295) internal successors, (295), 229 states have internal predecessors, (295), 51 states have call successors, (51), 19 states have call predecessors, (51), 29 states have return successors, (83), 49 states have call predecessors, (83), 47 states have call successors, (83) [2023-11-12 02:15:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 429 transitions. [2023-11-12 02:15:55,684 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 429 transitions. Word has length 70 [2023-11-12 02:15:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:55,684 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 429 transitions. [2023-11-12 02:15:55,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 02:15:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 429 transitions. [2023-11-12 02:15:55,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 02:15:55,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:55,687 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:15:55,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:55,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:55,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:55,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2023-11-12 02:15:55,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:55,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208848192] [2023-11-12 02:15:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:55,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:15:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:15:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:15:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-12 02:15:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-12 02:15:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-12 02:15:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-12 02:15:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-12 02:15:56,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208848192] [2023-11-12 02:15:56,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208848192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430869632] [2023-11-12 02:15:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:56,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:56,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:56,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:56,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:15:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:56,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:15:56,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:15:56,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:56,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430869632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:56,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:15:56,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2023-11-12 02:15:56,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939776945] [2023-11-12 02:15:56,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:56,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:15:56,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:15:56,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:15:56,607 INFO L87 Difference]: Start difference. First operand 298 states and 429 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 02:15:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:56,949 INFO L93 Difference]: Finished difference Result 653 states and 958 transitions. [2023-11-12 02:15:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:15:56,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2023-11-12 02:15:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:56,954 INFO L225 Difference]: With dead ends: 653 [2023-11-12 02:15:56,954 INFO L226 Difference]: Without dead ends: 373 [2023-11-12 02:15:56,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:15:56,957 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 133 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:56,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 291 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:15:56,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-12 02:15:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 309. [2023-11-12 02:15:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 228 states have (on average 1.368421052631579) internal successors, (312), 240 states have internal predecessors, (312), 51 states have call successors, (51), 19 states have call predecessors, (51), 29 states have return successors, (83), 49 states have call predecessors, (83), 47 states have call successors, (83) [2023-11-12 02:15:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 446 transitions. [2023-11-12 02:15:57,008 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 446 transitions. Word has length 72 [2023-11-12 02:15:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:57,009 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 446 transitions. [2023-11-12 02:15:57,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 02:15:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 446 transitions. [2023-11-12 02:15:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-12 02:15:57,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:57,012 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:15:57,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:57,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:15:57,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:57,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2023-11-12 02:15:57,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:57,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456371000] [2023-11-12 02:15:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:57,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:15:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:15:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:15:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-12 02:15:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-12 02:15:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-12 02:15:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-12 02:15:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-12 02:15:57,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:57,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456371000] [2023-11-12 02:15:57,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456371000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:57,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67761691] [2023-11-12 02:15:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:57,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:57,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:57,639 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:57,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:15:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:57,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:15:57,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 02:15:57,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:15:57,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67761691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:15:57,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:15:57,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-12 02:15:57,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741956902] [2023-11-12 02:15:57,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:15:57,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:15:57,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:57,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:15:57,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:15:57,881 INFO L87 Difference]: Start difference. First operand 309 states and 446 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 02:15:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:57,958 INFO L93 Difference]: Finished difference Result 635 states and 950 transitions. [2023-11-12 02:15:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:15:57,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2023-11-12 02:15:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:57,962 INFO L225 Difference]: With dead ends: 635 [2023-11-12 02:15:57,962 INFO L226 Difference]: Without dead ends: 344 [2023-11-12 02:15:57,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:15:57,965 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 4 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:57,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 152 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:15:57,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-12 02:15:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 317. [2023-11-12 02:15:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 236 states have (on average 1.3601694915254237) internal successors, (321), 248 states have internal predecessors, (321), 51 states have call successors, (51), 19 states have call predecessors, (51), 29 states have return successors, (83), 49 states have call predecessors, (83), 47 states have call successors, (83) [2023-11-12 02:15:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 455 transitions. [2023-11-12 02:15:58,019 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 455 transitions. Word has length 73 [2023-11-12 02:15:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:58,020 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 455 transitions. [2023-11-12 02:15:58,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 02:15:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 455 transitions. [2023-11-12 02:15:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-12 02:15:58,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:58,023 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:15:58,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:58,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:58,239 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:58,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:58,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1595103561, now seen corresponding path program 1 times [2023-11-12 02:15:58,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:58,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280833448] [2023-11-12 02:15:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:58,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:15:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:15:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:15:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:15:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-12 02:15:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-12 02:15:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:15:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-12 02:15:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-12 02:15:58,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:58,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280833448] [2023-11-12 02:15:58,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280833448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:15:58,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907624372] [2023-11-12 02:15:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:58,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:58,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:58,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:58,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:15:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:58,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-12 02:15:59,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:59,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 8 treesize of output 1 [2023-11-12 02:15:59,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 8 treesize of output 1 [2023-11-12 02:15:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:15:59,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:16:00,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907624372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:00,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:00,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 10] total 26 [2023-11-12 02:16:00,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248348460] [2023-11-12 02:16:00,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:00,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 02:16:00,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:00,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 02:16:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:16:00,597 INFO L87 Difference]: Start difference. First operand 317 states and 455 transitions. Second operand has 26 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-12 02:16:02,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:16:04,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:16:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:06,176 INFO L93 Difference]: Finished difference Result 829 states and 1180 transitions. [2023-11-12 02:16:06,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-12 02:16:06,181 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 81 [2023-11-12 02:16:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:06,185 INFO L225 Difference]: With dead ends: 829 [2023-11-12 02:16:06,185 INFO L226 Difference]: Without dead ends: 464 [2023-11-12 02:16:06,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2023-11-12 02:16:06,190 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 143 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 47 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:06,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1154 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 789 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2023-11-12 02:16:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2023-11-12 02:16:06,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 356. [2023-11-12 02:16:06,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 283 states have (on average 1.342756183745583) internal successors, (380), 292 states have internal predecessors, (380), 45 states have call successors, (45), 20 states have call predecessors, (45), 27 states have return successors, (62), 43 states have call predecessors, (62), 42 states have call successors, (62) [2023-11-12 02:16:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 487 transitions. [2023-11-12 02:16:06,253 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 487 transitions. Word has length 81 [2023-11-12 02:16:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:06,253 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 487 transitions. [2023-11-12 02:16:06,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 10 states have call successors, (20), 4 states have call predecessors, (20), 9 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-12 02:16:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 487 transitions. [2023-11-12 02:16:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-12 02:16:06,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:06,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 02:16:06,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:06,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:06,465 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:06,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:06,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1760908594, now seen corresponding path program 1 times [2023-11-12 02:16:06,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:06,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706820442] [2023-11-12 02:16:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:06,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:06,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:16:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:06,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:16:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:06,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:16:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:07,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:16:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:07,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-12 02:16:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:07,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-12 02:16:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:07,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-12 02:16:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:07,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:16:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:16:07,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:07,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706820442] [2023-11-12 02:16:07,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706820442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:07,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900654079] [2023-11-12 02:16:07,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:07,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:07,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:07,137 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:07,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:16:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:07,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-12 02:16:07,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:07,407 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 8 treesize of output 1 [2023-11-12 02:16:07,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 8 treesize of output 1 [2023-11-12 02:16:09,775 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| Int) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|) 0)))) is different from true [2023-11-12 02:16:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 02:16:09,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:16:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:16:10,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900654079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:16:10,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:16:10,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 18 [2023-11-12 02:16:10,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606963846] [2023-11-12 02:16:10,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:16:10,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:16:10,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:10,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:16:10,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2023-11-12 02:16:10,069 INFO L87 Difference]: Start difference. First operand 356 states and 487 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-12 02:16:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:11,018 INFO L93 Difference]: Finished difference Result 1161 states and 1676 transitions. [2023-11-12 02:16:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:16:11,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 83 [2023-11-12 02:16:11,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:11,028 INFO L225 Difference]: With dead ends: 1161 [2023-11-12 02:16:11,028 INFO L226 Difference]: Without dead ends: 905 [2023-11-12 02:16:11,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=141, Invalid=512, Unknown=1, NotChecked=48, Total=702 [2023-11-12 02:16:11,034 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 178 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:11,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 717 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 447 Invalid, 0 Unknown, 314 Unchecked, 0.5s Time] [2023-11-12 02:16:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2023-11-12 02:16:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 494. [2023-11-12 02:16:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 402 states have (on average 1.3308457711442787) internal successors, (535), 413 states have internal predecessors, (535), 57 states have call successors, (57), 25 states have call predecessors, (57), 34 states have return successors, (86), 55 states have call predecessors, (86), 54 states have call successors, (86) [2023-11-12 02:16:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 678 transitions. [2023-11-12 02:16:11,140 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 678 transitions. Word has length 83 [2023-11-12 02:16:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:11,140 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 678 transitions. [2023-11-12 02:16:11,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 6 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-12 02:16:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 678 transitions. [2023-11-12 02:16:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-12 02:16:11,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:11,145 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:16:11,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:11,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:11,352 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:11,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:11,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1343511988, now seen corresponding path program 1 times [2023-11-12 02:16:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:11,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908560565] [2023-11-12 02:16:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:11,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:16:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:16:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:16:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:16:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-12 02:16:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-12 02:16:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-12 02:16:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:16:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 02:16:11,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908560565] [2023-11-12 02:16:11,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908560565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528533557] [2023-11-12 02:16:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:11,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:11,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:11,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:16:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:11,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:16:11,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 02:16:11,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:16:11,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528533557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:11,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:16:11,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-11-12 02:16:11,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645331745] [2023-11-12 02:16:11,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:11,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:16:11,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:11,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:16:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:16:11,879 INFO L87 Difference]: Start difference. First operand 494 states and 678 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 02:16:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:11,988 INFO L93 Difference]: Finished difference Result 801 states and 1119 transitions. [2023-11-12 02:16:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:11,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 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 83 [2023-11-12 02:16:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:11,993 INFO L225 Difference]: With dead ends: 801 [2023-11-12 02:16:11,993 INFO L226 Difference]: Without dead ends: 486 [2023-11-12 02:16:11,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 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 02:16:11,996 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 8 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:11,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 242 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:16:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-11-12 02:16:12,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 482. [2023-11-12 02:16:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 390 states have (on average 1.317948717948718) internal successors, (514), 401 states have internal predecessors, (514), 57 states have call successors, (57), 25 states have call predecessors, (57), 34 states have return successors, (86), 55 states have call predecessors, (86), 54 states have call successors, (86) [2023-11-12 02:16:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 657 transitions. [2023-11-12 02:16:12,083 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 657 transitions. Word has length 83 [2023-11-12 02:16:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:12,084 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 657 transitions. [2023-11-12 02:16:12,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 02:16:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 657 transitions. [2023-11-12 02:16:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-12 02:16:12,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:12,087 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:12,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-12 02:16:12,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:12,295 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:12,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:12,295 INFO L85 PathProgramCache]: Analyzing trace with hash -989880650, now seen corresponding path program 1 times [2023-11-12 02:16:12,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:12,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303842824] [2023-11-12 02:16:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:12,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:13,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:16:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:13,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:16:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:13,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:16:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:13,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:16:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:13,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-12 02:16:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:13,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-12 02:16:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:13,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-12 02:16:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:13,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:16:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 02:16:13,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:13,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303842824] [2023-11-12 02:16:13,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303842824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:13,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757168499] [2023-11-12 02:16:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:13,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:13,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:13,253 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:13,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:16:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:13,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:16:13,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 02:16:13,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:16:13,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757168499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:13,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:16:13,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2023-11-12 02:16:13,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793781511] [2023-11-12 02:16:13,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:13,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:16:13,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:16:13,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:16:13,517 INFO L87 Difference]: Start difference. First operand 482 states and 657 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 02:16:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:16:13,579 INFO L93 Difference]: Finished difference Result 736 states and 1022 transitions. [2023-11-12 02:16:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:13,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 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 83 [2023-11-12 02:16:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:16:13,582 INFO L225 Difference]: With dead ends: 736 [2023-11-12 02:16:13,582 INFO L226 Difference]: Without dead ends: 292 [2023-11-12 02:16:13,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:16:13,585 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 3 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:16:13,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 233 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:16:13,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-11-12 02:16:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 284. [2023-11-12 02:16:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 224 states have (on average 1.2276785714285714) internal successors, (275), 229 states have internal predecessors, (275), 35 states have call successors, (35), 21 states have call predecessors, (35), 24 states have return successors, (48), 33 states have call predecessors, (48), 32 states have call successors, (48) [2023-11-12 02:16:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2023-11-12 02:16:13,626 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 83 [2023-11-12 02:16:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:16:13,626 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2023-11-12 02:16:13,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 02:16:13,627 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2023-11-12 02:16:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-12 02:16:13,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:16:13,631 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:13,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:16:13,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:13,838 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:16:13,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1164062340, now seen corresponding path program 1 times [2023-11-12 02:16:13,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:13,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793565377] [2023-11-12 02:16:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:13,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:16:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:16:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:16:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-12 02:16:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-12 02:16:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-12 02:16:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-12 02:16:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-12 02:16:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 02:16:14,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:14,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793565377] [2023-11-12 02:16:14,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793565377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:16:14,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61828678] [2023-11-12 02:16:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:14,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:16:14,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:16:14,206 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:16:14,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88a696b7-db0d-41cf-9ee5-a258c8d82d31/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:16:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:14,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-12 02:16:14,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:16:14,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-12 02:16:14,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:16:14,633 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1