./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:11:49,064 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:11:49,135 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-06 23:11:49,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:11:49,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:11:49,168 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:11:49,169 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:11:49,169 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:11:49,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:11:49,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:11:49,172 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:11:49,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:11:49,173 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:11:49,174 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:11:49,174 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:11:49,175 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:11:49,175 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:11:49,176 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:11:49,176 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:11:49,177 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:11:49,178 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:11:49,178 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:11:49,179 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:11:49,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:11:49,180 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:11:49,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:11:49,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:11:49,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:11:49,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:11:49,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:11:49,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:11:49,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:11:49,185 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:11:49,186 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:11:49,186 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:11:49,187 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:11:49,187 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_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d [2023-11-06 23:11:49,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:11:49,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:11:49,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:11:49,496 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:11:49,497 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:11:49,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2023-11-06 23:11:52,654 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:11:53,296 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:11:53,297 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2023-11-06 23:11:53,341 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/data/d1b397931/3bae9db7a88f45a9843c2e2a374616b4/FLAG2f053b78c [2023-11-06 23:11:53,363 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/data/d1b397931/3bae9db7a88f45a9843c2e2a374616b4 [2023-11-06 23:11:53,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:11:53,368 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:11:53,369 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:53,370 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:11:53,379 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:11:53,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:53" (1/1) ... [2023-11-06 23:11:53,381 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c9d4c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:53, skipping insertion in model container [2023-11-06 23:11:53,382 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:53" (1/1) ... [2023-11-06 23:11:53,525 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:11:53,873 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_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4492,4505] [2023-11-06 23:11:53,884 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_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4552,4565] [2023-11-06 23:11:55,122 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:55,123 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:55,124 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:55,125 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:55,126 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:55,143 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:55,144 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:55,147 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:55,148 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:55,589 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-06 23:11:55,591 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-06 23:11:55,592 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-06 23:11:55,594 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-06 23:11:55,596 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-06 23:11:55,597 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-06 23:11:55,598 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-06 23:11:55,599 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-06 23:11:55,599 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-06 23:11:55,600 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-06 23:11:55,973 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:55,973 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:56,121 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:11:56,137 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_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4492,4505] [2023-11-06 23:11:56,149 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_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4552,4565] [2023-11-06 23:11:56,198 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,211 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,212 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,213 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,217 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,224 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,230 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,233 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,233 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,289 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-06 23:11:56,290 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-06 23:11:56,291 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-06 23:11:56,292 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-06 23:11:56,293 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-06 23:11:56,295 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-06 23:11:56,299 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-06 23:11:56,300 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-06 23:11:56,300 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-06 23:11:56,302 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-06 23:11:56,461 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8269] [2023-11-06 23:11:56,462 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,463 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-06 23:11:56,477 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8755-8766] [2023-11-06 23:11:56,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:56,785 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,785 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,785 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,786 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,786 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,786 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,786 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,786 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,787 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,787 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,787 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,787 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,788 WARN L672 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,788 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,788 WARN L672 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,788 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,788 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,789 WARN L672 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:56,798 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:11:56,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56 WrapperNode [2023-11-06 23:11:56,798 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:56,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:11:56,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:11:56,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:11:56,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:56,942 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:57,058 INFO L138 Inliner]: procedures = 689, calls = 2640, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 874 [2023-11-06 23:11:57,062 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:11:57,064 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:11:57,064 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:11:57,064 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:11:57,074 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:57,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:57,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:57,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:57,153 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:57,159 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:57,166 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:57,172 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:57,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:11:57,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:11:57,184 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:11:57,185 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:11:57,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (1/1) ... [2023-11-06 23:11:57,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:11:57,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:57,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:11:57,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:11:57,317 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-11-06 23:11:57,317 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-11-06 23:11:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:11:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-06 23:11:57,318 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-06 23:11:57,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2023-11-06 23:11:57,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-06 23:11:57,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-06 23:11:57,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:11:57,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-06 23:11:57,321 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-06 23:11:57,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 23:11:57,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 23:11:57,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:11:57,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:11:57,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 23:11:57,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:11:57,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:11:57,323 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-06 23:11:57,323 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-06 23:11:57,323 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-06 23:11:57,323 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-06 23:11:57,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-06 23:11:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-06 23:11:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:11:57,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:11:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:11:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 23:11:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2023-11-06 23:11:57,325 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2023-11-06 23:11:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 23:11:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-06 23:11:57,326 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-06 23:11:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-06 23:11:57,326 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-06 23:11:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:11:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2023-11-06 23:11:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:11:57,673 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:11:57,676 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:11:59,368 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:11:59,379 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:11:59,379 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 23:11:59,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:11:59 BoogieIcfgContainer [2023-11-06 23:11:59,383 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:11:59,387 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:11:59,387 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:11:59,391 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:11:59,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:11:53" (1/3) ... [2023-11-06 23:11:59,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e8d326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:11:59, skipping insertion in model container [2023-11-06 23:11:59,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:56" (2/3) ... [2023-11-06 23:11:59,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e8d326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:11:59, skipping insertion in model container [2023-11-06 23:11:59,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:11:59" (3/3) ... [2023-11-06 23:11:59,396 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_harness.i [2023-11-06 23:11:59,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:11:59,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:11:59,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:11:59,505 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=LoopsAndPotentialCycles, 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;@1c1ab2c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:11:59,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:11:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-06 23:11:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-06 23:11:59,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:59,530 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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] [2023-11-06 23:11:59,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:59,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash 259728785, now seen corresponding path program 1 times [2023-11-06 23:11:59,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:59,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592410218] [2023-11-06 23:11:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:00,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:00,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:12:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:12:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-06 23:12:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:12:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-06 23:12:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-06 23:12:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-06 23:12:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 23:12:01,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:01,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592410218] [2023-11-06 23:12:01,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592410218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:01,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059183682] [2023-11-06 23:12:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:01,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:01,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:01,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:01,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:12:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:01,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:12:01,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 23:12:02,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:02,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059183682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:02,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:02,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-06 23:12:02,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403665912] [2023-11-06 23:12:02,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:02,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:12:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:02,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:12:02,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:12:02,223 INFO L87 Difference]: Start difference. First operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-06 23:12:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:02,533 INFO L93 Difference]: Finished difference Result 258 states and 370 transitions. [2023-11-06 23:12:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:12:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2023-11-06 23:12:02,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:02,547 INFO L225 Difference]: With dead ends: 258 [2023-11-06 23:12:02,548 INFO L226 Difference]: Without dead ends: 127 [2023-11-06 23:12:02,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:12:02,556 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 200 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:02,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 466 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:12:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-06 23:12:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-06 23:12:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 85 states have internal predecessors, (104), 32 states have call successors, (32), 10 states have call predecessors, (32), 11 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2023-11-06 23:12:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2023-11-06 23:12:02,617 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 77 [2023-11-06 23:12:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:02,618 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2023-11-06 23:12:02,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-06 23:12:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2023-11-06 23:12:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-06 23:12:02,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:02,627 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:02,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:02,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 23:12:02,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:02,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:02,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1492783356, now seen corresponding path program 1 times [2023-11-06 23:12:02,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:02,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064747618] [2023-11-06 23:12:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:02,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:12:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:12:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 23:12:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-06 23:12:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-06 23:12:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-06 23:12:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-06 23:12:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 23:12:03,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:03,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064747618] [2023-11-06 23:12:03,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064747618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:03,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724588258] [2023-11-06 23:12:03,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:03,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:03,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:03,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:03,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:12:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:04,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 2563 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:12:04,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 23:12:04,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:04,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724588258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:04,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:04,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2023-11-06 23:12:04,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873025029] [2023-11-06 23:12:04,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:04,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:12:04,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:04,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:12:04,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:12:04,702 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-06 23:12:05,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:05,081 INFO L93 Difference]: Finished difference Result 220 states and 297 transitions. [2023-11-06 23:12:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:12:05,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2023-11-06 23:12:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:05,084 INFO L225 Difference]: With dead ends: 220 [2023-11-06 23:12:05,085 INFO L226 Difference]: Without dead ends: 124 [2023-11-06 23:12:05,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:12:05,088 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 204 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:05,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 640 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:12:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-06 23:12:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-06 23:12:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-06 23:12:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2023-11-06 23:12:05,108 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 83 [2023-11-06 23:12:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:05,109 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2023-11-06 23:12:05,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-06 23:12:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2023-11-06 23:12:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-06 23:12:05,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:05,112 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:12:05,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:05,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 23:12:05,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:05,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1451742418, now seen corresponding path program 1 times [2023-11-06 23:12:05,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:05,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570270186] [2023-11-06 23:12:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:05,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:12:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:12:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 23:12:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-06 23:12:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-06 23:12:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:12:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:12:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-06 23:12:06,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:06,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570270186] [2023-11-06 23:12:06,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570270186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:06,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:12:06,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 23:12:06,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372334764] [2023-11-06 23:12:06,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:06,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:12:06,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:06,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:12:06,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:12:06,705 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-06 23:12:07,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:07,925 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2023-11-06 23:12:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:12:07,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 95 [2023-11-06 23:12:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:07,929 INFO L225 Difference]: With dead ends: 136 [2023-11-06 23:12:07,929 INFO L226 Difference]: Without dead ends: 134 [2023-11-06 23:12:07,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:12:07,931 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 98 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:07,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 518 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:12:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-06 23:12:07,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2023-11-06 23:12:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 89 states have internal predecessors, (107), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2023-11-06 23:12:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 177 transitions. [2023-11-06 23:12:07,951 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 177 transitions. Word has length 95 [2023-11-06 23:12:07,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:07,952 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 177 transitions. [2023-11-06 23:12:07,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-06 23:12:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 177 transitions. [2023-11-06 23:12:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-06 23:12:07,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:07,955 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:07,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:12:07,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:07,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash -364356006, now seen corresponding path program 1 times [2023-11-06 23:12:07,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:07,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572502469] [2023-11-06 23:12:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:07,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:12:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:12:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 23:12:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-06 23:12:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-06 23:12:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:12:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:12:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-06 23:12:09,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:09,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572502469] [2023-11-06 23:12:09,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572502469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:09,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:12:09,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:12:09,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915852860] [2023-11-06 23:12:09,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:09,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:12:09,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:09,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:12:09,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:12:09,494 INFO L87 Difference]: Start difference. First operand 133 states and 177 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-06 23:12:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:10,417 INFO L93 Difference]: Finished difference Result 267 states and 371 transitions. [2023-11-06 23:12:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:12:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 99 [2023-11-06 23:12:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:10,421 INFO L225 Difference]: With dead ends: 267 [2023-11-06 23:12:10,421 INFO L226 Difference]: Without dead ends: 158 [2023-11-06 23:12:10,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:12:10,424 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 133 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:10,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 299 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:12:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-06 23:12:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2023-11-06 23:12:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.2391304347826086) internal successors, (114), 94 states have internal predecessors, (114), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2023-11-06 23:12:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2023-11-06 23:12:10,457 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 99 [2023-11-06 23:12:10,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:10,458 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2023-11-06 23:12:10,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-06 23:12:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2023-11-06 23:12:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-06 23:12:10,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:10,472 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:10,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:12:10,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:10,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:10,474 INFO L85 PathProgramCache]: Analyzing trace with hash -106190568, now seen corresponding path program 1 times [2023-11-06 23:12:10,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:10,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236085020] [2023-11-06 23:12:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:10,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:12,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:12,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:12,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:12:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:12,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:12:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:12,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:12,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 23:12:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:13,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-06 23:12:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:13,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-06 23:12:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:13,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-06 23:12:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:13,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:12:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 23:12:13,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236085020] [2023-11-06 23:12:13,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236085020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858106809] [2023-11-06 23:12:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:13,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:13,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:13,444 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:13,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:12:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:14,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 2604 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 23:12:14,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:14,275 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 [2023-11-06 23:12:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:12:15,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:15,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858106809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:15,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:15,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 29 [2023-11-06 23:12:15,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242917215] [2023-11-06 23:12:15,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:15,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:12:15,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:15,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:12:15,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2023-11-06 23:12:15,227 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-06 23:12:18,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:20,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:22,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:24,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:26,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:29,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:31,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:33,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:34,435 INFO L93 Difference]: Finished difference Result 352 states and 477 transitions. [2023-11-06 23:12:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:12:34,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 99 [2023-11-06 23:12:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:34,439 INFO L225 Difference]: With dead ends: 352 [2023-11-06 23:12:34,439 INFO L226 Difference]: Without dead ends: 234 [2023-11-06 23:12:34,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 23:12:34,442 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 192 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 46 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:34,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1372 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 831 Invalid, 8 Unknown, 0 Unchecked, 18.8s Time] [2023-11-06 23:12:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-06 23:12:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 225. [2023-11-06 23:12:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 152 states have (on average 1.25) internal successors, (190), 155 states have internal predecessors, (190), 54 states have call successors, (54), 17 states have call predecessors, (54), 18 states have return successors, (57), 52 states have call predecessors, (57), 52 states have call successors, (57) [2023-11-06 23:12:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 301 transitions. [2023-11-06 23:12:34,479 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 301 transitions. Word has length 99 [2023-11-06 23:12:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:34,480 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 301 transitions. [2023-11-06 23:12:34,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-06 23:12:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 301 transitions. [2023-11-06 23:12:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-06 23:12:34,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:34,483 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:12:34,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:34,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:34,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:34,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash -974393564, now seen corresponding path program 1 times [2023-11-06 23:12:34,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:34,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131041646] [2023-11-06 23:12:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:34,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:12:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:12:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-06 23:12:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-06 23:12:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-06 23:12:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-11-06 23:12:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-06 23:12:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 23:12:35,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:35,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131041646] [2023-11-06 23:12:35,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131041646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:35,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130156568] [2023-11-06 23:12:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:35,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:35,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:35,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:35,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:12:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:36,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 2618 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:12:36,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 23:12:36,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:36,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130156568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:36,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:36,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2023-11-06 23:12:36,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638530198] [2023-11-06 23:12:36,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:36,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:12:36,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:12:36,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:12:36,621 INFO L87 Difference]: Start difference. First operand 225 states and 301 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-06 23:12:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:36,774 INFO L93 Difference]: Finished difference Result 436 states and 590 transitions. [2023-11-06 23:12:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:12:36,775 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2023-11-06 23:12:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:36,780 INFO L225 Difference]: With dead ends: 436 [2023-11-06 23:12:36,781 INFO L226 Difference]: Without dead ends: 235 [2023-11-06 23:12:36,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:12:36,783 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 13 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:36,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1230 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:12:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-06 23:12:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 230. [2023-11-06 23:12:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 156 states have (on average 1.2435897435897436) internal successors, (194), 160 states have internal predecessors, (194), 54 states have call successors, (54), 17 states have call predecessors, (54), 19 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2023-11-06 23:12:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 308 transitions. [2023-11-06 23:12:36,813 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 308 transitions. Word has length 107 [2023-11-06 23:12:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:36,814 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 308 transitions. [2023-11-06 23:12:36,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-06 23:12:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 308 transitions. [2023-11-06 23:12:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:12:36,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:36,816 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:36,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:37,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:37,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:37,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:37,027 INFO L85 PathProgramCache]: Analyzing trace with hash -464219701, now seen corresponding path program 1 times [2023-11-06 23:12:37,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:37,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625854536] [2023-11-06 23:12:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:37,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:12:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:12:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-06 23:12:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-06 23:12:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-06 23:12:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-06 23:12:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-06 23:12:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-06 23:12:37,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:37,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625854536] [2023-11-06 23:12:37,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625854536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:37,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044274037] [2023-11-06 23:12:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:37,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:37,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:37,503 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:37,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:12:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:12:38,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 23:12:38,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:38,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044274037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:38,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:38,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-06 23:12:38,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10913211] [2023-11-06 23:12:38,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:38,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:12:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:12:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:12:38,148 INFO L87 Difference]: Start difference. First operand 230 states and 308 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-06 23:12:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:38,192 INFO L93 Difference]: Finished difference Result 449 states and 614 transitions. [2023-11-06 23:12:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:12:38,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 109 [2023-11-06 23:12:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:38,195 INFO L225 Difference]: With dead ends: 449 [2023-11-06 23:12:38,195 INFO L226 Difference]: Without dead ends: 243 [2023-11-06 23:12:38,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:12:38,197 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 9 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:38,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 477 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:12:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-06 23:12:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 234. [2023-11-06 23:12:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 160 states have (on average 1.2375) internal successors, (198), 164 states have internal predecessors, (198), 54 states have call successors, (54), 17 states have call predecessors, (54), 19 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2023-11-06 23:12:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 312 transitions. [2023-11-06 23:12:38,223 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 312 transitions. Word has length 109 [2023-11-06 23:12:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:38,223 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 312 transitions. [2023-11-06 23:12:38,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-06 23:12:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 312 transitions. [2023-11-06 23:12:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:12:38,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:38,226 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 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] [2023-11-06 23:12:38,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:38,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:38,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:38,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash -638573041, now seen corresponding path program 1 times [2023-11-06 23:12:38,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:38,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791245436] [2023-11-06 23:12:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:12:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:12:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-06 23:12:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-06 23:12:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-06 23:12:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-06 23:12:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-06 23:12:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-06 23:12:38,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:38,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791245436] [2023-11-06 23:12:38,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791245436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:38,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494174415] [2023-11-06 23:12:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:38,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:38,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:38,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:12:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:39,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:12:39,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 23:12:39,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:39,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494174415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:39,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:39,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2023-11-06 23:12:39,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572776644] [2023-11-06 23:12:39,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:39,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:12:39,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:12:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:12:39,501 INFO L87 Difference]: Start difference. First operand 234 states and 312 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-06 23:12:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:39,548 INFO L93 Difference]: Finished difference Result 474 states and 645 transitions. [2023-11-06 23:12:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:12:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 109 [2023-11-06 23:12:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:39,552 INFO L225 Difference]: With dead ends: 474 [2023-11-06 23:12:39,552 INFO L226 Difference]: Without dead ends: 264 [2023-11-06 23:12:39,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:12:39,555 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 28 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:39,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 495 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:12:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-11-06 23:12:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 234. [2023-11-06 23:12:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 160 states have (on average 1.225) internal successors, (196), 164 states have internal predecessors, (196), 54 states have call successors, (54), 17 states have call predecessors, (54), 19 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2023-11-06 23:12:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 310 transitions. [2023-11-06 23:12:39,590 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 310 transitions. Word has length 109 [2023-11-06 23:12:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:39,591 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 310 transitions. [2023-11-06 23:12:39,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-06 23:12:39,591 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 310 transitions. [2023-11-06 23:12:39,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:12:39,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:39,593 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:39,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:39,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:39,803 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:39,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:39,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1745351697, now seen corresponding path program 1 times [2023-11-06 23:12:39,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:39,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231365635] [2023-11-06 23:12:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:39,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:12:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:12:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:12:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:12:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:12:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-06 23:12:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-06 23:12:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-06 23:12:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-06 23:12:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-06 23:12:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 23:12:40,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:40,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231365635] [2023-11-06 23:12:40,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231365635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:40,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460393655] [2023-11-06 23:12:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:40,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:40,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:40,993 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:41,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:12:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:41,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 2625 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:12:41,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:41,837 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 [2023-11-06 23:12:42,661 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:42,661 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 24 treesize of output 20 [2023-11-06 23:12:42,669 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 18 treesize of output 10 [2023-11-06 23:12:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 23:12:42,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:42,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460393655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:42,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:42,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10] total 23 [2023-11-06 23:12:42,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046102783] [2023-11-06 23:12:42,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:42,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:12:42,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:42,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:12:42,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-11-06 23:12:42,725 INFO L87 Difference]: Start difference. First operand 234 states and 310 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 11 states have internal predecessors, (64), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-06 23:12:45,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:47,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:49,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:51,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:54,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:56,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:12:58,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:00,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:02,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:04,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:06,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:08,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:10,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:12,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:14,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:16,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:18,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:21,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:23,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:26,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:28,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:30,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:32,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:34,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:36,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:37,598 INFO L93 Difference]: Finished difference Result 446 states and 588 transitions. [2023-11-06 23:13:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:13:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 11 states have internal predecessors, (64), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 109 [2023-11-06 23:13:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:37,602 INFO L225 Difference]: With dead ends: 446 [2023-11-06 23:13:37,602 INFO L226 Difference]: Without dead ends: 260 [2023-11-06 23:13:37,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2023-11-06 23:13:37,604 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 227 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 47 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:37,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1355 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1396 Invalid, 25 Unknown, 0 Unchecked, 54.4s Time] [2023-11-06 23:13:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-06 23:13:37,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 247. [2023-11-06 23:13:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 170 states have (on average 1.2117647058823529) internal successors, (206), 174 states have internal predecessors, (206), 55 states have call successors, (55), 18 states have call predecessors, (55), 21 states have return successors, (65), 54 states have call predecessors, (65), 53 states have call successors, (65) [2023-11-06 23:13:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 326 transitions. [2023-11-06 23:13:37,629 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 326 transitions. Word has length 109 [2023-11-06 23:13:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:37,629 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 326 transitions. [2023-11-06 23:13:37,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 11 states have internal predecessors, (64), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-06 23:13:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 326 transitions. [2023-11-06 23:13:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:13:37,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:37,632 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:13:37,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:37,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:37,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:37,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1333461873, now seen corresponding path program 1 times [2023-11-06 23:13:37,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:37,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91179936] [2023-11-06 23:13:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:37,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:13:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:13:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:13:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:13:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:13:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:13:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-06 23:13:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-06 23:13:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-06 23:13:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-06 23:13:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-06 23:13:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 23:13:38,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:38,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91179936] [2023-11-06 23:13:38,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91179936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:13:38,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887654259] [2023-11-06 23:13:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:38,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:38,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:38,987 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:38,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:13:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:39,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 2620 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 23:13:39,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:39,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:13:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 23:13:40,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:13:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-06 23:13:41,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887654259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:13:41,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:13:41,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 11] total 31 [2023-11-06 23:13:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961653017] [2023-11-06 23:13:41,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:13:41,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 23:13:41,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:41,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 23:13:41,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2023-11-06 23:13:41,483 INFO L87 Difference]: Start difference. First operand 247 states and 326 transitions. Second operand has 31 states, 29 states have (on average 4.862068965517241) internal successors, (141), 27 states have internal predecessors, (141), 10 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2023-11-06 23:13:45,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:47,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:51,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:53,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:55,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:13:59,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:01,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:03,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:14:04,856 INFO L93 Difference]: Finished difference Result 509 states and 685 transitions. [2023-11-06 23:14:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 23:14:04,857 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.862068965517241) internal successors, (141), 27 states have internal predecessors, (141), 10 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) Word has length 109 [2023-11-06 23:14:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:14:04,860 INFO L225 Difference]: With dead ends: 509 [2023-11-06 23:14:04,860 INFO L226 Difference]: Without dead ends: 291 [2023-11-06 23:14:04,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 217 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=634, Invalid=4622, Unknown=0, NotChecked=0, Total=5256 [2023-11-06 23:14:04,864 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 540 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 3983 mSolverCounterSat, 109 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 4100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3983 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:14:04,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1314 Invalid, 4100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3983 Invalid, 8 Unknown, 0 Unchecked, 21.7s Time] [2023-11-06 23:14:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-06 23:14:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 271. [2023-11-06 23:14:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 187 states have (on average 1.1925133689839573) internal successors, (223), 192 states have internal predecessors, (223), 59 states have call successors, (59), 20 states have call predecessors, (59), 24 states have return successors, (79), 58 states have call predecessors, (79), 56 states have call successors, (79) [2023-11-06 23:14:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 361 transitions. [2023-11-06 23:14:04,896 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 361 transitions. Word has length 109 [2023-11-06 23:14:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:14:04,897 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 361 transitions. [2023-11-06 23:14:04,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.862068965517241) internal successors, (141), 27 states have internal predecessors, (141), 10 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2023-11-06 23:14:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 361 transitions. [2023-11-06 23:14:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-06 23:14:04,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:14:04,899 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:14:04,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:14:05,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:05,120 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:14:05,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:14:05,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2019870094, now seen corresponding path program 1 times [2023-11-06 23:14:05,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:14:05,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143591624] [2023-11-06 23:14:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:05,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:14:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:14:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:14:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:14:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:14:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:14:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:14:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-06 23:14:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-06 23:14:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-06 23:14:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-06 23:14:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-06 23:14:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-06 23:14:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-06 23:14:07,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:14:07,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143591624] [2023-11-06 23:14:07,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143591624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:14:07,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087287918] [2023-11-06 23:14:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:14:07,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:14:07,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:14:07,863 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:14:07,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:14:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:14:08,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 2663 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-06 23:14:08,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:14:08,563 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:14:08,981 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:14:08,981 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-06 23:14:09,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:14:09,082 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:14:09,099 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:14:09,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-11-06 23:14:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 44 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 23:14:10,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:14:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 23:14:12,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087287918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:14:12,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:14:12,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 13] total 49 [2023-11-06 23:14:12,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931000875] [2023-11-06 23:14:12,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:14:12,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 23:14:12,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:14:12,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 23:14:12,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2178, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:14:12,671 INFO L87 Difference]: Start difference. First operand 271 states and 361 transitions. Second operand has 49 states, 46 states have (on average 3.5) internal successors, (161), 44 states have internal predecessors, (161), 13 states have call successors, (36), 7 states have call predecessors, (36), 11 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) [2023-11-06 23:14:15,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:18,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:20,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:24,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:26,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:30,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:32,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:36,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:38,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:41,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:43,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:45,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:47,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:14:59,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:02,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:04,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:09,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:15:13,841 INFO L93 Difference]: Finished difference Result 1295 states and 1659 transitions. [2023-11-06 23:15:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-11-06 23:15:13,843 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 3.5) internal successors, (161), 44 states have internal predecessors, (161), 13 states have call successors, (36), 7 states have call predecessors, (36), 11 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) Word has length 112 [2023-11-06 23:15:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:15:13,852 INFO L225 Difference]: With dead ends: 1295 [2023-11-06 23:15:13,852 INFO L226 Difference]: Without dead ends: 1084 [2023-11-06 23:15:13,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 235 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12508 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=3854, Invalid=34366, Unknown=0, NotChecked=0, Total=38220 [2023-11-06 23:15:13,870 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1158 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 8981 mSolverCounterSat, 682 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 9680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 8981 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:15:13,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 1470 Invalid, 9680 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [682 Valid, 8981 Invalid, 17 Unknown, 0 Unchecked, 47.8s Time] [2023-11-06 23:15:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2023-11-06 23:15:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 946. [2023-11-06 23:15:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 700 states have (on average 1.197142857142857) internal successors, (838), 722 states have internal predecessors, (838), 161 states have call successors, (161), 56 states have call predecessors, (161), 84 states have return successors, (217), 167 states have call predecessors, (217), 153 states have call successors, (217) [2023-11-06 23:15:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1216 transitions. [2023-11-06 23:15:13,998 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1216 transitions. Word has length 112 [2023-11-06 23:15:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:15:13,999 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 1216 transitions. [2023-11-06 23:15:13,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 3.5) internal successors, (161), 44 states have internal predecessors, (161), 13 states have call successors, (36), 7 states have call predecessors, (36), 11 states have return successors, (32), 11 states have call predecessors, (32), 13 states have call successors, (32) [2023-11-06 23:15:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1216 transitions. [2023-11-06 23:15:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-06 23:15:14,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:15:14,003 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:15:14,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:15:14,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:15:14,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:15:14,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:15:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash -887652206, now seen corresponding path program 1 times [2023-11-06 23:15:14,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:15:14,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001544597] [2023-11-06 23:15:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:15:14,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:15:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:15:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:15:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:15:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-06 23:15:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-06 23:15:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-06 23:15:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-06 23:15:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-06 23:15:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-06 23:15:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-06 23:15:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-06 23:15:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-06 23:15:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-06 23:15:16,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:15:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001544597] [2023-11-06 23:15:16,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001544597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:15:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041995982] [2023-11-06 23:15:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:15:16,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:15:16,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:15:16,684 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:15:16,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefd7d71-2c6f-4a20-b4d5-f8b142bb2554/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:15:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:15:17,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 2665 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-06 23:15:17,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:15:17,312 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 23:15:17,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 23:15:17,383 WARN L861 $PredicateComparison]: unable to prove that (exists ((|bounded_malloc_#res.base| Int)) (and (<= (+ |bounded_malloc_#res.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| (select |c_#valid| |bounded_malloc_#res.base|))))) is different from true [2023-11-06 23:15:17,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:15:17,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 23:15:17,606 WARN L861 $PredicateComparison]: unable to prove that (exists ((|bounded_malloc_#res.base| Int)) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| 1))) is different from true [2023-11-06 23:15:17,623 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 23:15:17,624 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 23:15:17,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:15:18,596 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-06 23:15:18,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-11-06 23:15:18,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2023-11-06 23:15:18,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2023-11-06 23:15:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 2 not checked. [2023-11-06 23:15:20,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:15:21,086 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_703 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_703) |c_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base|))) (< (mod (select .cse0 |c_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.offset|) 18446744073709551616) (+ (mod (select .cse0 (+ |c_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.offset| 16)) 18446744073709551616) 1)))) is different from false [2023-11-06 23:15:21,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041995982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:15:21,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:15:21,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 25] total 34 [2023-11-06 23:15:21,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590415281] [2023-11-06 23:15:21,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:15:21,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 23:15:21,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:15:21,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 23:15:21,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1335, Unknown=3, NotChecked=228, Total=1722 [2023-11-06 23:15:21,097 INFO L87 Difference]: Start difference. First operand 946 states and 1216 transitions. Second operand has 34 states, 32 states have (on average 4.21875) internal successors, (135), 31 states have internal predecessors, (135), 12 states have call successors, (25), 8 states have call predecessors, (25), 10 states have return successors, (22), 9 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-06 23:15:21,515 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base_BEFORE_CALL_33| Int)) (= (select |c_#valid| |v_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base_BEFORE_CALL_33|) 1)) (exists ((|bounded_malloc_#res.base| Int)) (and (<= (+ |bounded_malloc_#res.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| (select |c_#valid| |bounded_malloc_#res.base|))))) (exists ((|bounded_malloc_#res.base| Int)) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| 1))) (exists ((|v_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base_BEFORE_CALL_36| Int)) (and (let ((.cse0 (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base_BEFORE_CALL_36|))) (<= (mod (select .cse0 0) 18446744073709551616) (mod (select .cse0 16) 18446744073709551616))) (= (select |c_#valid| |v_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base_BEFORE_CALL_36|) 1)))) is different from true [2023-11-06 23:15:21,527 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|bounded_malloc_#res.base| Int)) (and (<= (+ |bounded_malloc_#res.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| (select |c_#valid| |bounded_malloc_#res.base|))))) (exists ((|bounded_malloc_#res.base| Int)) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| 1)))) is different from true [2023-11-06 23:15:23,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:25,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:25,786 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base_BEFORE_CALL_33| Int)) (= (select |c_#valid| |v_ULTIMATE.start_aws_byte_buf_write_harness_~#buf~3#1.base_BEFORE_CALL_33|) 1)) (exists ((|bounded_malloc_#res.base| Int)) (and (<= (+ |bounded_malloc_#res.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| (select |c_#valid| |bounded_malloc_#res.base|))))) (exists ((|bounded_malloc_#res.base| Int)) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| 1)))) is different from true [2023-11-06 23:15:27,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:33,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:35,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:37,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:39,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:15:42,041 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]