./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness_negated.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_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/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_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/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_1174bcf9-c518-4dd1-920e-0501127b439a/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 261b1cb19a19710392e8d342993a2adafcf7d2aa116ee074c520b900d3eff708 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:31:10,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:31:10,355 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-12 02:31:10,362 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:31:10,363 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:31:10,401 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:31:10,402 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:31:10,403 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:31:10,404 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:31:10,409 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:31:10,411 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:31:10,411 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:31:10,412 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:31:10,414 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:31:10,414 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:31:10,415 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:31:10,415 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:31:10,416 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:31:10,416 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:31:10,416 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:31:10,417 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:31:10,417 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:31:10,418 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:31:10,418 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:31:10,419 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:31:10,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:31:10,420 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:31:10,420 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:31:10,420 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:31:10,421 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:31:10,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:31:10,422 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:31:10,423 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:31:10,423 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:31:10,423 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:31:10,423 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:31:10,424 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_1174bcf9-c518-4dd1-920e-0501127b439a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 261b1cb19a19710392e8d342993a2adafcf7d2aa116ee074c520b900d3eff708 [2023-11-12 02:31:10,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:31:10,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:31:10,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:31:10,756 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:31:10,757 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:31:10,758 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness_negated.i [2023-11-12 02:31:13,866 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:31:14,555 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:31:14,556 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness_negated.i [2023-11-12 02:31:14,601 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/data/e60aea795/f14f51615ca141bc85bcc5e044327b56/FLAGc09fa8320 [2023-11-12 02:31:14,617 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/data/e60aea795/f14f51615ca141bc85bcc5e044327b56 [2023-11-12 02:31:14,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:31:14,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:31:14,623 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:31:14,623 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:31:14,629 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:31:14,630 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:31:14" (1/1) ... [2023-11-12 02:31:14,631 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d7ad0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:14, skipping insertion in model container [2023-11-12 02:31:14,631 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:31:14" (1/1) ... [2023-11-12 02:31:14,822 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:31:15,150 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_1174bcf9-c518-4dd1-920e-0501127b439a/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness_negated.i[4493,4506] [2023-11-12 02:31:15,159 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_1174bcf9-c518-4dd1-920e-0501127b439a/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness_negated.i[4553,4566] [2023-11-12 02:31:16,168 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:16,180 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:16,181 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:16,183 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:16,184 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:16,218 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:16,219 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:16,226 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:16,227 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:16,632 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 02:31:16,634 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 02:31:16,635 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 02:31:16,637 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 02:31:16,639 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 02:31:16,640 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 02:31:16,641 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 02:31:16,642 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 02:31:16,642 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 02:31:16,643 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 02:31:16,962 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:16,962 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:31:17,128 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:31:17,153 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_1174bcf9-c518-4dd1-920e-0501127b439a/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness_negated.i[4493,4506] [2023-11-12 02:31:17,154 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_1174bcf9-c518-4dd1-920e-0501127b439a/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_harness_negated.i[4553,4566] [2023-11-12 02:31:17,225 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,227 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,228 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,229 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,229 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,249 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,250 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,251 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,252 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,364 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 02:31:17,368 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 02:31:17,368 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 02:31:17,369 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 02:31:17,370 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 02:31:17,371 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 02:31:17,372 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 02:31:17,372 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 02:31:17,373 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 02:31:17,373 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 02:31:17,464 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8259] [2023-11-12 02:31:17,465 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,466 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 02:31:17,484 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8745-8756] [2023-11-12 02:31:17,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:31:17,884 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,884 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,886 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,886 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,887 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,887 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,887 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,887 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,887 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,887 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,888 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,888 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,888 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,889 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,889 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,889 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,889 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,890 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:17,897 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:31:17,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17 WrapperNode [2023-11-12 02:31:17,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:31:17,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:31:17,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:31:17,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:31:17,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,151 INFO L138 Inliner]: procedures = 690, calls = 2646, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 857 [2023-11-12 02:31:18,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:31:18,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:31:18,160 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:31:18,160 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:31:18,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,227 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,247 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:31:18,262 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:31:18,262 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:31:18,263 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:31:18,263 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (1/1) ... [2023-11-12 02:31:18,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:31:18,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:18,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:31:18,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:31:18,368 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-11-12 02:31:18,368 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-11-12 02:31:18,368 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2023-11-12 02:31:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2023-11-12 02:31:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:31:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 02:31:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 02:31:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_append [2023-11-12 02:31:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_append [2023-11-12 02:31:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:31:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 02:31:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 02:31:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:31:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:31:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:31:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:31:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:31:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-12 02:31:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-12 02:31:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:31:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:31:18,374 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 02:31:18,375 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 02:31:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:31:18,375 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:31:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-12 02:31:18,375 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-12 02:31:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:31:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:31:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 02:31:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 02:31:18,377 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 02:31:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure assert_bytes_match [2023-11-12 02:31:18,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_bytes_match [2023-11-12 02:31:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 02:31:18,378 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 02:31:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:31:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:31:18,728 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:31:18,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:31:20,563 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:31:20,572 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:31:20,572 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:31:20,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:31:20 BoogieIcfgContainer [2023-11-12 02:31:20,575 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:31:20,578 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:31:20,578 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:31:20,582 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:31:20,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:31:14" (1/3) ... [2023-11-12 02:31:20,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780c20da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:31:20, skipping insertion in model container [2023-11-12 02:31:20,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:17" (2/3) ... [2023-11-12 02:31:20,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780c20da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:31:20, skipping insertion in model container [2023-11-12 02:31:20,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:31:20" (3/3) ... [2023-11-12 02:31:20,585 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_append_harness_negated.i [2023-11-12 02:31:20,607 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:31:20,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:31:20,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:31:20,674 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;@6b16d9c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:31:20,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:31:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 108 states have internal predecessors, (130), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-12 02:31:20,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-12 02:31:20,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:20,695 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:20,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:20,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:20,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1617698357, now seen corresponding path program 1 times [2023-11-12 02:31:20,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:20,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479327252] [2023-11-12 02:31:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:20,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:31:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:31:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:31:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:31:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:31:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-12 02:31:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-12 02:31:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:31:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-12 02:31:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:31:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:31:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-12 02:31:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-12 02:31:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-12 02:31:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-12 02:31:21,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479327252] [2023-11-12 02:31:21,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479327252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:31:21,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:31:21,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:31:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924011057] [2023-11-12 02:31:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:31:21,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:31:21,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:21,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:31:21,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:31:21,888 INFO L87 Difference]: Start difference. First operand has 170 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 108 states have internal predecessors, (130), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 02:31:22,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:22,559 INFO L93 Difference]: Finished difference Result 336 states and 480 transitions. [2023-11-12 02:31:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:31:22,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) Word has length 97 [2023-11-12 02:31:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:22,577 INFO L225 Difference]: With dead ends: 336 [2023-11-12 02:31:22,577 INFO L226 Difference]: Without dead ends: 165 [2023-11-12 02:31:22,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:31:22,597 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 115 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:22,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 115 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:31:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-12 02:31:22,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-11-12 02:31:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 104 states have internal predecessors, (123), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-12 02:31:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 218 transitions. [2023-11-12 02:31:22,683 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 218 transitions. Word has length 97 [2023-11-12 02:31:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:22,684 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 218 transitions. [2023-11-12 02:31:22,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 1 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 02:31:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 218 transitions. [2023-11-12 02:31:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-12 02:31:22,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:22,691 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:22,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:31:22,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:22,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash -369216981, now seen corresponding path program 1 times [2023-11-12 02:31:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:22,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853190777] [2023-11-12 02:31:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:22,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:31:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:31:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:31:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:31:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:31:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-12 02:31:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-12 02:31:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:31:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-12 02:31:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:31:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:31:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-12 02:31:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-12 02:31:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-12 02:31:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-12 02:31:23,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:23,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853190777] [2023-11-12 02:31:23,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853190777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:23,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844899756] [2023-11-12 02:31:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:23,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:23,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:23,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:23,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:31:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:24,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:31:24,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 02:31:24,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-12 02:31:24,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844899756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:24,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:24,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:31:24,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252112416] [2023-11-12 02:31:24,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:24,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:31:24,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:24,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:31:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:31:24,794 INFO L87 Difference]: Start difference. First operand 165 states and 218 transitions. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 11 states have internal predecessors, (99), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) [2023-11-12 02:31:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:26,155 INFO L93 Difference]: Finished difference Result 319 states and 428 transitions. [2023-11-12 02:31:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:31:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 11 states have internal predecessors, (99), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) Word has length 97 [2023-11-12 02:31:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:26,160 INFO L225 Difference]: With dead ends: 319 [2023-11-12 02:31:26,161 INFO L226 Difference]: Without dead ends: 171 [2023-11-12 02:31:26,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:31:26,163 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 267 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:26,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 283 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:31:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-12 02:31:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-11-12 02:31:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 110 states have internal predecessors, (127), 48 states have call successors, (48), 13 states have call predecessors, (48), 15 states have return successors, (53), 47 states have call predecessors, (53), 47 states have call successors, (53) [2023-11-12 02:31:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 228 transitions. [2023-11-12 02:31:26,194 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 228 transitions. Word has length 97 [2023-11-12 02:31:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:26,194 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 228 transitions. [2023-11-12 02:31:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 11 states have internal predecessors, (99), 7 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) [2023-11-12 02:31:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 228 transitions. [2023-11-12 02:31:26,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-12 02:31:26,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:26,200 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:26,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:31:26,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:26,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:26,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2066662021, now seen corresponding path program 1 times [2023-11-12 02:31:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:26,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104383292] [2023-11-12 02:31:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:31:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:31:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:31:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:31:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:31:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-12 02:31:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:31:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:31:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:31:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:31:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-12 02:31:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-12 02:31:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:31:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-12 02:31:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-12 02:31:27,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:27,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104383292] [2023-11-12 02:31:27,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104383292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:31:27,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:31:27,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:31:27,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506356030] [2023-11-12 02:31:27,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:31:27,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:31:27,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:27,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:31:27,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:31:27,516 INFO L87 Difference]: Start difference. First operand 171 states and 228 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-12 02:31:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:28,360 INFO L93 Difference]: Finished difference Result 300 states and 401 transitions. [2023-11-12 02:31:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:31:28,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 105 [2023-11-12 02:31:28,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:28,363 INFO L225 Difference]: With dead ends: 300 [2023-11-12 02:31:28,364 INFO L226 Difference]: Without dead ends: 168 [2023-11-12 02:31:28,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:31:28,366 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 165 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:28,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 270 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:31:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-12 02:31:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-11-12 02:31:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 105 states have (on average 1.180952380952381) internal successors, (124), 107 states have internal predecessors, (124), 48 states have call successors, (48), 13 states have call predecessors, (48), 14 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2023-11-12 02:31:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 222 transitions. [2023-11-12 02:31:28,390 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 222 transitions. Word has length 105 [2023-11-12 02:31:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:28,391 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 222 transitions. [2023-11-12 02:31:28,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-12 02:31:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 222 transitions. [2023-11-12 02:31:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 02:31:28,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:28,394 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:28,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:31:28,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:28,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:28,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2020813690, now seen corresponding path program 1 times [2023-11-12 02:31:28,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:28,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978577955] [2023-11-12 02:31:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:28,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:31:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:31:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:31:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:31:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:31:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-12 02:31:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:31:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:31:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:31:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:31:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-12 02:31:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:31:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-12 02:31:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-12 02:31:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-12 02:31:29,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:29,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978577955] [2023-11-12 02:31:29,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978577955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:29,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981716987] [2023-11-12 02:31:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:29,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:29,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:29,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:29,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:31:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:30,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 2652 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:31:30,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 50 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 02:31:30,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-12 02:31:31,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981716987] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:31,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:31:31,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 8] total 21 [2023-11-12 02:31:31,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397520563] [2023-11-12 02:31:31,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:31:31,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:31:31,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:31,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:31:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:31:31,077 INFO L87 Difference]: Start difference. First operand 168 states and 222 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-12 02:31:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:31,439 INFO L93 Difference]: Finished difference Result 291 states and 384 transitions. [2023-11-12 02:31:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:31:31,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 111 [2023-11-12 02:31:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:31,442 INFO L225 Difference]: With dead ends: 291 [2023-11-12 02:31:31,442 INFO L226 Difference]: Without dead ends: 165 [2023-11-12 02:31:31,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:31:31,445 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 227 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:31,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 802 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:31:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-12 02:31:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-11-12 02:31:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 103 states have (on average 1.174757281553398) internal successors, (121), 104 states have internal predecessors, (121), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-12 02:31:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 216 transitions. [2023-11-12 02:31:31,470 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 216 transitions. Word has length 111 [2023-11-12 02:31:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:31,471 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 216 transitions. [2023-11-12 02:31:31,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-12 02:31:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 216 transitions. [2023-11-12 02:31:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-12 02:31:31,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:31,474 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:31,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:31,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:31,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:31,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1770709749, now seen corresponding path program 1 times [2023-11-12 02:31:31,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:31,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573437669] [2023-11-12 02:31:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:31,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:31:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:31:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:31:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:31:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:31:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-12 02:31:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:31:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:31:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:31:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:31:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-12 02:31:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:31:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-12 02:31:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-11-12 02:31:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-12 02:31:33,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:33,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573437669] [2023-11-12 02:31:33,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573437669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:33,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442524505] [2023-11-12 02:31:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:33,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:33,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:33,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:34,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:31:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:34,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 02:31:34,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:35,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 02:31:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-12 02:31:35,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:35,776 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-12 02:31:35,847 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-12 02:31:35,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2023-11-12 02:31:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-12 02:31:35,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442524505] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:35,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:35,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2023-11-12 02:31:35,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075051709] [2023-11-12 02:31:35,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:35,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:31:35,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:35,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:31:35,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:31:35,883 INFO L87 Difference]: Start difference. First operand 165 states and 216 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-12 02:31:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:39,633 INFO L93 Difference]: Finished difference Result 400 states and 534 transitions. [2023-11-12 02:31:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 02:31:39,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 113 [2023-11-12 02:31:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:39,637 INFO L225 Difference]: With dead ends: 400 [2023-11-12 02:31:39,637 INFO L226 Difference]: Without dead ends: 280 [2023-11-12 02:31:39,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 234 SyntacticMatches, 16 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 02:31:39,639 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 307 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:39,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 426 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2442 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-12 02:31:39,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-12 02:31:39,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 270. [2023-11-12 02:31:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 170 states have (on average 1.1588235294117648) internal successors, (197), 171 states have internal predecessors, (197), 77 states have call successors, (77), 22 states have call predecessors, (77), 22 states have return successors, (80), 76 states have call predecessors, (80), 75 states have call successors, (80) [2023-11-12 02:31:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 354 transitions. [2023-11-12 02:31:39,690 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 354 transitions. Word has length 113 [2023-11-12 02:31:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:39,693 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 354 transitions. [2023-11-12 02:31:39,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 14 states have internal predecessors, (88), 7 states have call successors, (26), 6 states have call predecessors, (26), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-12 02:31:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 354 transitions. [2023-11-12 02:31:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-12 02:31:39,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:39,695 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:39,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:39,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:39,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:39,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:39,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1925736603, now seen corresponding path program 1 times [2023-11-12 02:31:39,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:39,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415470393] [2023-11-12 02:31:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:39,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:31:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:31:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:31:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:31:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:31:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-12 02:31:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:31:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:31:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:31:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-12 02:31:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-12 02:31:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-12 02:31:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-11-12 02:31:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-12 02:31:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-12 02:31:41,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:41,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415470393] [2023-11-12 02:31:41,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415470393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:41,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278103486] [2023-11-12 02:31:41,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:41,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:41,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:41,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:41,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:31:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:42,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 2681 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 02:31:42,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-12 02:31:42,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-12 02:31:42,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278103486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:42,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:31:42,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 20 [2023-11-12 02:31:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697938220] [2023-11-12 02:31:42,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:42,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:31:42,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:31:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:31:42,521 INFO L87 Difference]: Start difference. First operand 270 states and 354 transitions. Second operand has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-12 02:31:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:44,819 INFO L93 Difference]: Finished difference Result 461 states and 611 transitions. [2023-11-12 02:31:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:31:44,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) Word has length 121 [2023-11-12 02:31:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:44,824 INFO L225 Difference]: With dead ends: 461 [2023-11-12 02:31:44,824 INFO L226 Difference]: Without dead ends: 287 [2023-11-12 02:31:44,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2023-11-12 02:31:44,826 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 150 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 2843 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:44,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 1015 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2843 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-12 02:31:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-12 02:31:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 275. [2023-11-12 02:31:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 174 states have (on average 1.1551724137931034) internal successors, (201), 176 states have internal predecessors, (201), 77 states have call successors, (77), 22 states have call predecessors, (77), 23 states have return successors, (84), 76 states have call predecessors, (84), 75 states have call successors, (84) [2023-11-12 02:31:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 362 transitions. [2023-11-12 02:31:44,885 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 362 transitions. Word has length 121 [2023-11-12 02:31:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:44,887 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 362 transitions. [2023-11-12 02:31:44,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 5.588235294117647) internal successors, (95), 15 states have internal predecessors, (95), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-12 02:31:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 362 transitions. [2023-11-12 02:31:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 02:31:44,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:44,891 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:44,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:45,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:45,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:45,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:45,103 INFO L85 PathProgramCache]: Analyzing trace with hash -508813440, now seen corresponding path program 1 times [2023-11-12 02:31:45,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:45,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851906221] [2023-11-12 02:31:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:45,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:31:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:31:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:31:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:31:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:31:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-12 02:31:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:31:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:31:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:31:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-12 02:31:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-12 02:31:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-12 02:31:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-12 02:31:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-12 02:31:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-12 02:31:46,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:46,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851906221] [2023-11-12 02:31:46,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851906221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:31:46,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:31:46,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 02:31:46,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364395864] [2023-11-12 02:31:46,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:31:46,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:31:46,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:46,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:31:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:31:46,768 INFO L87 Difference]: Start difference. First operand 275 states and 362 transitions. Second operand has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 02:31:47,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:47,882 INFO L93 Difference]: Finished difference Result 435 states and 569 transitions. [2023-11-12 02:31:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:31:47,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 123 [2023-11-12 02:31:47,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:47,885 INFO L225 Difference]: With dead ends: 435 [2023-11-12 02:31:47,885 INFO L226 Difference]: Without dead ends: 275 [2023-11-12 02:31:47,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:31:47,887 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 127 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:47,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 500 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:31:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-12 02:31:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2023-11-12 02:31:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 174 states have (on average 1.1551724137931034) internal successors, (201), 176 states have internal predecessors, (201), 77 states have call successors, (77), 22 states have call predecessors, (77), 23 states have return successors, (83), 76 states have call predecessors, (83), 75 states have call successors, (83) [2023-11-12 02:31:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 361 transitions. [2023-11-12 02:31:47,940 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 361 transitions. Word has length 123 [2023-11-12 02:31:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:47,940 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 361 transitions. [2023-11-12 02:31:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 02:31:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 361 transitions. [2023-11-12 02:31:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-12 02:31:47,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:47,943 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:47,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:31:47,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:47,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1642823079, now seen corresponding path program 1 times [2023-11-12 02:31:47,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:47,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392510738] [2023-11-12 02:31:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:47,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-12 02:31:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:31:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:31:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-12 02:31:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:31:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-12 02:31:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-12 02:31:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-12 02:31:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:31:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-12 02:31:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-12 02:31:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:31:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-12 02:31:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-11-12 02:31:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-12 02:31:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-11-12 02:31:50,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392510738] [2023-11-12 02:31:50,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392510738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:31:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183058410] [2023-11-12 02:31:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:50,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:50,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:50,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1174bcf9-c518-4dd1-920e-0501127b439a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:31:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:51,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 2687 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-12 02:31:51,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:51,450 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 15 treesize of output 1 [2023-11-12 02:31:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-12 02:31:51,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:31:51,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183058410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:31:51,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:31:51,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 17 [2023-11-12 02:31:51,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562110846] [2023-11-12 02:31:51,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:31:51,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:31:51,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:31:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:31:51,736 INFO L87 Difference]: Start difference. First operand 275 states and 361 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-12 02:31:54,621 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]