./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 175c9418701070e8128f8ed008fd30685ed8c019e1010acc82e904c5730ef842 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:20:41,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:20:41,154 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-28 20:20:41,160 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:20:41,160 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:20:41,183 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:20:41,183 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:20:41,184 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:20:41,185 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:20:41,186 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:20:41,186 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:20:41,187 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:20:41,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:20:41,188 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:20:41,189 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:20:41,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:20:41,190 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:20:41,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:20:41,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:20:41,192 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:20:41,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:20:41,193 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:20:41,193 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:20:41,194 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:20:41,194 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:20:41,195 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:20:41,195 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:20:41,195 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:20:41,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:20:41,196 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:20:41,197 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:20:41,197 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:20:41,197 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:20:41,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:20:41,198 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:20:41,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:20:41,198 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:20:41,199 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:20:41,199 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:20:41,199 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_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 175c9418701070e8128f8ed008fd30685ed8c019e1010acc82e904c5730ef842 [2023-11-28 20:20:41,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:20:41,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:20:41,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:20:41,433 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:20:41,434 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:20:41,435 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i [2023-11-28 20:20:44,183 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:20:44,556 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:20:44,557 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i [2023-11-28 20:20:44,603 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/data/73e530221/62caa62bc9b54dd2b5840c97f46059b7/FLAG149df8700 [2023-11-28 20:20:44,625 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/data/73e530221/62caa62bc9b54dd2b5840c97f46059b7 [2023-11-28 20:20:44,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:20:44,639 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:20:44,642 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:20:44,643 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:20:44,648 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:20:44,648 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,650 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47158a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44, skipping insertion in model container [2023-11-28 20:20:44,650 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,759 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:20:44,982 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_e8dde157-8274-4d6a-b867-38c70cee4858/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4505,4518] [2023-11-28 20:20:44,989 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_e8dde157-8274-4d6a-b867-38c70cee4858/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4565,4578] [2023-11-28 20:20:45,884 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,886 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,886 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,887 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,889 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,905 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,906 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,909 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:45,909 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,341 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-28 20:20:46,342 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-28 20:20:46,343 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-28 20:20:46,345 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-28 20:20:46,346 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-28 20:20:46,347 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-28 20:20:46,348 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-28 20:20:46,349 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-28 20:20:46,350 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-28 20:20:46,351 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-28 20:20:46,531 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,531 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:20:46,676 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:20:46,691 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_e8dde157-8274-4d6a-b867-38c70cee4858/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4505,4518] [2023-11-28 20:20:46,692 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_e8dde157-8274-4d6a-b867-38c70cee4858/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4565,4578] [2023-11-28 20:20:46,750 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,750 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,751 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,751 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,752 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,761 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,761 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,762 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,763 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,804 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-28 20:20:46,806 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-28 20:20:46,806 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-28 20:20:46,807 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-28 20:20:46,808 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-28 20:20:46,809 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-28 20:20:46,810 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-28 20:20:46,811 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-28 20:20:46,811 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-28 20:20:46,812 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-28 20:20:46,848 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,849 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-28 20:20:46,856 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7671-7682] [2023-11-28 20:20:46,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:20:47,116 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,116 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,116 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,116 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,117 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,117 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,117 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,117 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,117 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,117 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,117 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,117 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,118 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,118 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,118 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 20:20:47,124 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:20:47,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47 WrapperNode [2023-11-28 20:20:47,125 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:20:47,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:20:47,126 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:20:47,126 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:20:47,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,191 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,254 INFO L138 Inliner]: procedures = 688, calls = 1536, calls flagged for inlining = 52, calls inlined = 9, statements flattened = 764 [2023-11-28 20:20:47,255 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:20:47,256 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:20:47,256 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:20:47,256 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:20:47,269 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,277 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,341 INFO L175 MemorySlicer]: Split 300 memory accesses to 6 slices as follows [46, 2, 8, 236, 5, 3]. 79 percent of accesses are in the largest equivalence class. The 259 initializations are split as follows [11, 2, 2, 236, 5, 3]. The 7 writes are split as follows [6, 0, 1, 0, 0, 0]. [2023-11-28 20:20:47,342 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,342 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,376 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,382 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,397 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,410 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:20:47,411 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:20:47,411 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:20:47,411 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:20:47,412 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (1/1) ... [2023-11-28 20:20:47,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:20:47,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:47,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:20:47,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:20:47,479 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-28 20:20:47,479 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-28 20:20:47,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:20:47,479 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-28 20:20:47,479 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-28 20:20:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-28 20:20:47,480 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-28 20:20:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-28 20:20:47,480 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-28 20:20:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:20:47,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:20:47,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:20:47,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 20:20:47,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 20:20:47,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-28 20:20:47,481 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-28 20:20:47,482 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-28 20:20:47,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-28 20:20:47,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-28 20:20:47,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:20:47,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:20:47,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-28 20:20:47,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-28 20:20:47,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-28 20:20:47,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-28 20:20:47,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-28 20:20:47,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-28 20:20:47,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:20:47,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:20:47,483 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-28 20:20:47,483 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-28 20:20:47,483 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2023-11-28 20:20:47,484 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2023-11-28 20:20:47,484 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-28 20:20:47,484 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-28 20:20:47,484 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-28 20:20:47,484 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-28 20:20:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-28 20:20:47,485 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-28 20:20:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-28 20:20:47,485 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-28 20:20:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:20:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-28 20:20:47,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-28 20:20:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-28 20:20:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-28 20:20:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-28 20:20:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-28 20:20:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-28 20:20:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-28 20:20:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-28 20:20:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-28 20:20:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-28 20:20:47,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-28 20:20:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-28 20:20:47,487 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-28 20:20:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-28 20:20:47,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-28 20:20:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:20:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:20:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:20:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 20:20:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 20:20:47,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-28 20:20:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-28 20:20:47,488 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-28 20:20:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-28 20:20:47,488 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-28 20:20:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:20:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:20:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:20:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 20:20:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 20:20:47,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-28 20:20:47,750 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:20:47,753 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:20:48,457 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:20:48,581 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:20:48,581 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-28 20:20:48,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:20:48 BoogieIcfgContainer [2023-11-28 20:20:48,582 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:20:48,584 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:20:48,584 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:20:48,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:20:48,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:20:44" (1/3) ... [2023-11-28 20:20:48,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9cad4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:20:48, skipping insertion in model container [2023-11-28 20:20:48,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:47" (2/3) ... [2023-11-28 20:20:48,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9cad4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:20:48, skipping insertion in model container [2023-11-28 20:20:48,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:20:48" (3/3) ... [2023-11-28 20:20:48,590 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_dynamic_harness_negated.i [2023-11-28 20:20:48,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:20:48,608 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:20:48,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:20:48,669 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38ec840f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:20:48,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:20:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 121 states have (on average 1.28099173553719) internal successors, (155), 121 states have internal predecessors, (155), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-28 20:20:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-28 20:20:48,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:48,709 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:48,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:48,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:48,714 INFO L85 PathProgramCache]: Analyzing trace with hash -955814862, now seen corresponding path program 1 times [2023-11-28 20:20:48,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:48,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73225432] [2023-11-28 20:20:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:49,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:49,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73225432] [2023-11-28 20:20:49,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:20:49,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886540272] [2023-11-28 20:20:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:49,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:49,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:49,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:49,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:20:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:49,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 20:20:49,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2023-11-28 20:20:49,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:20:49,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886540272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:49,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:49,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:20:49,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38087277] [2023-11-28 20:20:49,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:49,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:20:49,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:49,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:20:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:20:49,878 INFO L87 Difference]: Start difference. First operand has 199 states, 121 states have (on average 1.28099173553719) internal successors, (155), 121 states have internal predecessors, (155), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-28 20:20:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:50,024 INFO L93 Difference]: Finished difference Result 374 states and 564 transitions. [2023-11-28 20:20:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:20:50,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 128 [2023-11-28 20:20:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:50,039 INFO L225 Difference]: With dead ends: 374 [2023-11-28 20:20:50,039 INFO L226 Difference]: Without dead ends: 195 [2023-11-28 20:20:50,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:20:50,050 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:50,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 254 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:20:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-28 20:20:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-11-28 20:20:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 116 states have (on average 1.2413793103448276) internal successors, (144), 118 states have internal predecessors, (144), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:20:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 266 transitions. [2023-11-28 20:20:50,118 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 266 transitions. Word has length 128 [2023-11-28 20:20:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:50,120 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 266 transitions. [2023-11-28 20:20:50,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-28 20:20:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 266 transitions. [2023-11-28 20:20:50,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-28 20:20:50,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:50,127 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:50,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:20:50,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-28 20:20:50,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:50,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1820788207, now seen corresponding path program 1 times [2023-11-28 20:20:50,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:50,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593550184] [2023-11-28 20:20:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:50,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:50,425 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:20:50,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78644743] [2023-11-28 20:20:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:50,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:50,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:50,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:50,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:20:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:51,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 2434 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:20:51,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-11-28 20:20:51,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:20:51,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:51,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593550184] [2023-11-28 20:20:51,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:20:51,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78644743] [2023-11-28 20:20:51,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78644743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:51,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:51,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:20:51,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10194985] [2023-11-28 20:20:51,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:51,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:20:51,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:51,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:20:51,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:20:51,094 INFO L87 Difference]: Start difference. First operand 195 states and 266 transitions. Second operand has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2023-11-28 20:20:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:51,949 INFO L93 Difference]: Finished difference Result 358 states and 483 transitions. [2023-11-28 20:20:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:20:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 158 [2023-11-28 20:20:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:51,954 INFO L225 Difference]: With dead ends: 358 [2023-11-28 20:20:51,954 INFO L226 Difference]: Without dead ends: 195 [2023-11-28 20:20:51,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:20:51,957 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 9 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:51,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1207 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-28 20:20:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-28 20:20:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-11-28 20:20:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 116 states have (on average 1.2327586206896552) internal successors, (143), 118 states have internal predecessors, (143), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:20:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 265 transitions. [2023-11-28 20:20:51,980 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 265 transitions. Word has length 158 [2023-11-28 20:20:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:51,981 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 265 transitions. [2023-11-28 20:20:51,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.4) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2023-11-28 20:20:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 265 transitions. [2023-11-28 20:20:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-28 20:20:51,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:51,986 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:51,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:20:52,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-28 20:20:52,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:52,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:52,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2036283713, now seen corresponding path program 1 times [2023-11-28 20:20:52,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:52,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336942063] [2023-11-28 20:20:52,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:52,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:52,284 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:20:52,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560653490] [2023-11-28 20:20:52,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:52,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:52,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:52,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:52,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:20:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:52,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 2450 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:20:52,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2023-11-28 20:20:52,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:20:52,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:52,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336942063] [2023-11-28 20:20:52,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:20:52,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560653490] [2023-11-28 20:20:52,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560653490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:52,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:52,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:52,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112135540] [2023-11-28 20:20:52,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:52,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:52,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:52,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:52,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:52,957 INFO L87 Difference]: Start difference. First operand 195 states and 265 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-28 20:20:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:53,111 INFO L93 Difference]: Finished difference Result 355 states and 481 transitions. [2023-11-28 20:20:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:53,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 162 [2023-11-28 20:20:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:53,115 INFO L225 Difference]: With dead ends: 355 [2023-11-28 20:20:53,115 INFO L226 Difference]: Without dead ends: 196 [2023-11-28 20:20:53,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:53,117 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 0 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:53,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 494 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:20:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-28 20:20:53,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-28 20:20:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 119 states have internal predecessors, (144), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:20:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 266 transitions. [2023-11-28 20:20:53,139 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 266 transitions. Word has length 162 [2023-11-28 20:20:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:53,140 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 266 transitions. [2023-11-28 20:20:53,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-28 20:20:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 266 transitions. [2023-11-28 20:20:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-28 20:20:53,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:53,143 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:53,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:20:53,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:53,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:53,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash -535335863, now seen corresponding path program 1 times [2023-11-28 20:20:53,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:53,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232254289] [2023-11-28 20:20:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:53,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:53,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:20:53,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178669602] [2023-11-28 20:20:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:53,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:53,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:53,441 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:53,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:20:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:54,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 2488 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:20:54,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 149 proven. 1 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-11-28 20:20:54,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:20:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2023-11-28 20:20:54,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:54,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232254289] [2023-11-28 20:20:54,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:20:54,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178669602] [2023-11-28 20:20:54,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178669602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:20:54,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:20:54,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-28 20:20:54,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065125613] [2023-11-28 20:20:54,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:20:54,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 20:20:54,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:54,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 20:20:54,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:20:54,424 INFO L87 Difference]: Start difference. First operand 196 states and 266 transitions. Second operand has 13 states, 11 states have (on average 7.0) internal successors, (77), 13 states have internal predecessors, (77), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-28 20:20:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:55,642 INFO L93 Difference]: Finished difference Result 362 states and 486 transitions. [2023-11-28 20:20:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:20:55,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 7.0) internal successors, (77), 13 states have internal predecessors, (77), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 164 [2023-11-28 20:20:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:55,645 INFO L225 Difference]: With dead ends: 362 [2023-11-28 20:20:55,645 INFO L226 Difference]: Without dead ends: 197 [2023-11-28 20:20:55,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:20:55,647 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 10 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:55,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2649 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-28 20:20:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-28 20:20:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-11-28 20:20:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 118 states have (on average 1.228813559322034) internal successors, (145), 120 states have internal predecessors, (145), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:20:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 267 transitions. [2023-11-28 20:20:55,663 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 267 transitions. Word has length 164 [2023-11-28 20:20:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:55,664 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 267 transitions. [2023-11-28 20:20:55,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 7.0) internal successors, (77), 13 states have internal predecessors, (77), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-28 20:20:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 267 transitions. [2023-11-28 20:20:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-28 20:20:55,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:55,668 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:55,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:20:55,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:55,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:55,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:55,873 INFO L85 PathProgramCache]: Analyzing trace with hash -934805695, now seen corresponding path program 2 times [2023-11-28 20:20:55,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:55,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694047359] [2023-11-28 20:20:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:55,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:55,958 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:20:55,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246218960] [2023-11-28 20:20:55,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:20:55,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:55,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:55,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:55,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:20:56,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:20:56,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:20:56,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 20:20:56,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2023-11-28 20:20:56,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:20:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-11-28 20:20:57,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694047359] [2023-11-28 20:20:57,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:20:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246218960] [2023-11-28 20:20:57,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246218960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:20:57,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:20:57,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2023-11-28 20:20:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665906822] [2023-11-28 20:20:57,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:20:57,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:20:57,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:20:57,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:20:57,244 INFO L87 Difference]: Start difference. First operand 197 states and 267 transitions. Second operand has 17 states, 15 states have (on average 4.733333333333333) internal successors, (71), 17 states have internal predecessors, (71), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-28 20:20:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:58,214 INFO L93 Difference]: Finished difference Result 364 states and 488 transitions. [2023-11-28 20:20:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:20:58,215 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.733333333333333) internal successors, (71), 17 states have internal predecessors, (71), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 166 [2023-11-28 20:20:58,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:58,217 INFO L225 Difference]: With dead ends: 364 [2023-11-28 20:20:58,217 INFO L226 Difference]: Without dead ends: 198 [2023-11-28 20:20:58,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:20:58,219 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 15 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2413 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:58,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2413 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 20:20:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-28 20:20:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2023-11-28 20:20:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 119 states have (on average 1.226890756302521) internal successors, (146), 121 states have internal predecessors, (146), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:20:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 268 transitions. [2023-11-28 20:20:58,234 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 268 transitions. Word has length 166 [2023-11-28 20:20:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:58,235 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 268 transitions. [2023-11-28 20:20:58,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.733333333333333) internal successors, (71), 17 states have internal predecessors, (71), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-28 20:20:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 268 transitions. [2023-11-28 20:20:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-28 20:20:58,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:58,238 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:58,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:20:58,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:58,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:58,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:58,439 INFO L85 PathProgramCache]: Analyzing trace with hash -284757943, now seen corresponding path program 3 times [2023-11-28 20:20:58,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:58,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436515983] [2023-11-28 20:20:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:58,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:58,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:20:58,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239169206] [2023-11-28 20:20:58,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:20:58,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:58,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:58,528 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:58,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:21:03,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:21:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:03,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-28 20:21:03,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-11-28 20:21:03,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-11-28 20:21:04,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:04,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436515983] [2023-11-28 20:21:04,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:04,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239169206] [2023-11-28 20:21:04,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239169206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:04,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:04,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-11-28 20:21:04,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058632019] [2023-11-28 20:21:04,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:04,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:21:04,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:04,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:21:04,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:21:04,298 INFO L87 Difference]: Start difference. First operand 198 states and 268 transitions. Second operand has 17 states, 15 states have (on average 4.666666666666667) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-28 20:21:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:05,560 INFO L93 Difference]: Finished difference Result 366 states and 490 transitions. [2023-11-28 20:21:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:21:05,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.666666666666667) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 168 [2023-11-28 20:21:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:05,563 INFO L225 Difference]: With dead ends: 366 [2023-11-28 20:21:05,563 INFO L226 Difference]: Without dead ends: 199 [2023-11-28 20:21:05,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:21:05,565 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 20 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:05,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1926 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 20:21:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-11-28 20:21:05,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2023-11-28 20:21:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 120 states have (on average 1.225) internal successors, (147), 122 states have internal predecessors, (147), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:21:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 269 transitions. [2023-11-28 20:21:05,578 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 269 transitions. Word has length 168 [2023-11-28 20:21:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:05,579 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 269 transitions. [2023-11-28 20:21:05,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.666666666666667) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-28 20:21:05,580 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 269 transitions. [2023-11-28 20:21:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-28 20:21:05,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:05,582 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 9, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:05,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:21:05,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-28 20:21:05,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:05,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:05,784 INFO L85 PathProgramCache]: Analyzing trace with hash -431094463, now seen corresponding path program 4 times [2023-11-28 20:21:05,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:05,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702672061] [2023-11-28 20:21:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:05,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:05,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:05,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111670752] [2023-11-28 20:21:05,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:21:05,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:05,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:05,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:05,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:21:06,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:21:06,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:06,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-28 20:21:06,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 39 proven. 10 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-11-28 20:21:06,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-11-28 20:21:07,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:07,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702672061] [2023-11-28 20:21:07,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:07,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111670752] [2023-11-28 20:21:07,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111670752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:07,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:07,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-28 20:21:07,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020240369] [2023-11-28 20:21:07,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:07,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:21:07,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:07,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:21:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:21:07,103 INFO L87 Difference]: Start difference. First operand 199 states and 269 transitions. Second operand has 19 states, 17 states have (on average 4.235294117647059) internal successors, (72), 19 states have internal predecessors, (72), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-28 20:21:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:08,282 INFO L93 Difference]: Finished difference Result 368 states and 492 transitions. [2023-11-28 20:21:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:21:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.235294117647059) internal successors, (72), 19 states have internal predecessors, (72), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 170 [2023-11-28 20:21:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:08,284 INFO L225 Difference]: With dead ends: 368 [2023-11-28 20:21:08,284 INFO L226 Difference]: Without dead ends: 200 [2023-11-28 20:21:08,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-28 20:21:08,285 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 16 mSDsluCounter, 2403 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2647 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:08,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2647 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 20:21:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-28 20:21:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-11-28 20:21:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 123 states have internal predecessors, (148), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:21:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2023-11-28 20:21:08,298 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 170 [2023-11-28 20:21:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:08,299 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2023-11-28 20:21:08,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.235294117647059) internal successors, (72), 19 states have internal predecessors, (72), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-28 20:21:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2023-11-28 20:21:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-28 20:21:08,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:08,302 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:08,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:21:08,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-28 20:21:08,503 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:08,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:08,503 INFO L85 PathProgramCache]: Analyzing trace with hash 866923593, now seen corresponding path program 5 times [2023-11-28 20:21:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:08,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022683002] [2023-11-28 20:21:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:08,578 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:08,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002031982] [2023-11-28 20:21:08,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:21:08,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:08,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:08,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:08,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:21:09,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-28 20:21:09,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:09,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 20:21:09,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 181 proven. 15 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-11-28 20:21:09,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2023-11-28 20:21:10,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:10,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022683002] [2023-11-28 20:21:10,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:10,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002031982] [2023-11-28 20:21:10,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002031982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:10,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:10,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-28 20:21:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42539338] [2023-11-28 20:21:10,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:10,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-28 20:21:10,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-28 20:21:10,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:21:10,018 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 21 states have internal predecessors, (85), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-28 20:21:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:11,424 INFO L93 Difference]: Finished difference Result 370 states and 494 transitions. [2023-11-28 20:21:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:21:11,425 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 21 states have internal predecessors, (85), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 172 [2023-11-28 20:21:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:11,427 INFO L225 Difference]: With dead ends: 370 [2023-11-28 20:21:11,427 INFO L226 Difference]: Without dead ends: 201 [2023-11-28 20:21:11,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:21:11,429 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 12 mSDsluCounter, 2402 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:11,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2646 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-28 20:21:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-28 20:21:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-11-28 20:21:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 122 states have (on average 1.221311475409836) internal successors, (149), 124 states have internal predecessors, (149), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:21:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 271 transitions. [2023-11-28 20:21:11,438 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 271 transitions. Word has length 172 [2023-11-28 20:21:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:11,439 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 271 transitions. [2023-11-28 20:21:11,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 21 states have internal predecessors, (85), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-28 20:21:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 271 transitions. [2023-11-28 20:21:11,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-28 20:21:11,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:11,441 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:11,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:21:11,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:11,645 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:11,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash 130108225, now seen corresponding path program 6 times [2023-11-28 20:21:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:11,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264529991] [2023-11-28 20:21:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:11,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:11,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754959818] [2023-11-28 20:21:11,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:21:11,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:11,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:11,721 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:11,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:21:15,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-28 20:21:15,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:15,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 2235 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-28 20:21:15,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 64 proven. 21 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2023-11-28 20:21:15,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-11-28 20:21:15,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:15,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264529991] [2023-11-28 20:21:15,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:15,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754959818] [2023-11-28 20:21:15,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754959818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:15,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:15,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-11-28 20:21:15,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408099925] [2023-11-28 20:21:15,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:15,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:21:15,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:15,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:21:15,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:21:15,849 INFO L87 Difference]: Start difference. First operand 201 states and 271 transitions. Second operand has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-28 20:21:17,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:17,888 INFO L93 Difference]: Finished difference Result 372 states and 496 transitions. [2023-11-28 20:21:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:21:17,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 174 [2023-11-28 20:21:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:17,890 INFO L225 Difference]: With dead ends: 372 [2023-11-28 20:21:17,891 INFO L226 Difference]: Without dead ends: 202 [2023-11-28 20:21:17,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:21:17,892 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 23 mSDsluCounter, 3844 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4088 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:17,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 4088 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-28 20:21:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-28 20:21:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-11-28 20:21:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 123 states have (on average 1.2195121951219512) internal successors, (150), 125 states have internal predecessors, (150), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:21:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 272 transitions. [2023-11-28 20:21:17,905 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 272 transitions. Word has length 174 [2023-11-28 20:21:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:17,905 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 272 transitions. [2023-11-28 20:21:17,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-28 20:21:17,906 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 272 transitions. [2023-11-28 20:21:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-28 20:21:17,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:17,907 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:17,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:21:18,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-28 20:21:18,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:18,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1983330377, now seen corresponding path program 7 times [2023-11-28 20:21:18,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:18,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608491335] [2023-11-28 20:21:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:18,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:18,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:18,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602052123] [2023-11-28 20:21:18,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:21:18,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:18,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:18,196 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:18,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:21:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:19,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 2716 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-28 20:21:19,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 209 proven. 28 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-11-28 20:21:19,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2023-11-28 20:21:19,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:19,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608491335] [2023-11-28 20:21:19,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:19,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602052123] [2023-11-28 20:21:19,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602052123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:19,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:19,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-28 20:21:19,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397949445] [2023-11-28 20:21:19,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:19,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:21:19,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:19,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:21:19,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:21:19,947 INFO L87 Difference]: Start difference. First operand 202 states and 272 transitions. Second operand has 25 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-28 20:21:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:21,850 INFO L93 Difference]: Finished difference Result 374 states and 498 transitions. [2023-11-28 20:21:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:21:21,851 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 176 [2023-11-28 20:21:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:21,852 INFO L225 Difference]: With dead ends: 374 [2023-11-28 20:21:21,853 INFO L226 Difference]: Without dead ends: 203 [2023-11-28 20:21:21,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:21:21,854 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 16 mSDsluCounter, 2882 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3126 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:21,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 3126 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-28 20:21:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-28 20:21:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2023-11-28 20:21:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 124 states have (on average 1.217741935483871) internal successors, (151), 126 states have internal predecessors, (151), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:21:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 273 transitions. [2023-11-28 20:21:21,867 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 273 transitions. Word has length 176 [2023-11-28 20:21:21,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:21,867 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 273 transitions. [2023-11-28 20:21:21,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.869565217391304) internal successors, (89), 25 states have internal predecessors, (89), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-28 20:21:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 273 transitions. [2023-11-28 20:21:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-28 20:21:21,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:21,869 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:21,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:22,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:21:22,070 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:22,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:22,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1022480705, now seen corresponding path program 8 times [2023-11-28 20:21:22,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:22,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290814279] [2023-11-28 20:21:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:22,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:22,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200709076] [2023-11-28 20:21:22,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:21:22,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:22,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:22,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:22,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:21:23,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:21:23,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:23,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 2754 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-28 20:21:23,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 226 proven. 36 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2023-11-28 20:21:23,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2023-11-28 20:21:24,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:24,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290814279] [2023-11-28 20:21:24,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:21:24,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200709076] [2023-11-28 20:21:24,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200709076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:24,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:21:24,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-11-28 20:21:24,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324003094] [2023-11-28 20:21:24,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:24,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-28 20:21:24,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:24,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-28 20:21:24,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2023-11-28 20:21:24,197 INFO L87 Difference]: Start difference. First operand 203 states and 273 transitions. Second operand has 27 states, 25 states have (on average 3.64) internal successors, (91), 27 states have internal predecessors, (91), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-28 20:21:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:25,788 INFO L93 Difference]: Finished difference Result 376 states and 500 transitions. [2023-11-28 20:21:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 20:21:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.64) internal successors, (91), 27 states have internal predecessors, (91), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) Word has length 178 [2023-11-28 20:21:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:25,790 INFO L225 Difference]: With dead ends: 376 [2023-11-28 20:21:25,790 INFO L226 Difference]: Without dead ends: 204 [2023-11-28 20:21:25,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2023-11-28 20:21:25,792 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 12 mSDsluCounter, 3602 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3846 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:25,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3846 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-28 20:21:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-28 20:21:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-11-28 20:21:25,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 125 states have (on average 1.216) internal successors, (152), 127 states have internal predecessors, (152), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:21:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 274 transitions. [2023-11-28 20:21:25,804 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 274 transitions. Word has length 178 [2023-11-28 20:21:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:25,805 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 274 transitions. [2023-11-28 20:21:25,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.64) internal successors, (91), 27 states have internal predecessors, (91), 6 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 6 states have call predecessors, (41), 6 states have call successors, (41) [2023-11-28 20:21:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 274 transitions. [2023-11-28 20:21:25,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-28 20:21:25,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:25,807 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:25,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:21:26,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:26,007 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:26,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:26,008 INFO L85 PathProgramCache]: Analyzing trace with hash -489161655, now seen corresponding path program 9 times [2023-11-28 20:21:26,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:26,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735745156] [2023-11-28 20:21:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:26,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:26,120 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:21:26,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199290766] [2023-11-28 20:21:26,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:21:26,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:26,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:26,123 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:26,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:22:49,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-28 20:22:49,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:22:49,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 2307 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:22:49,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 115 proven. 45 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-11-28 20:22:49,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 108 proven. 45 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-11-28 20:22:49,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:49,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735745156] [2023-11-28 20:22:49,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:22:49,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199290766] [2023-11-28 20:22:49,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199290766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:49,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:22:49,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-11-28 20:22:49,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383955285] [2023-11-28 20:22:49,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:49,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-28 20:22:49,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:49,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-28 20:22:49,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-11-28 20:22:49,932 INFO L87 Difference]: Start difference. First operand 204 states and 274 transitions. Second operand has 29 states, 27 states have (on average 3.037037037037037) internal successors, (82), 29 states have internal predecessors, (82), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-28 20:22:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:51,990 INFO L93 Difference]: Finished difference Result 378 states and 502 transitions. [2023-11-28 20:22:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 20:22:51,991 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.037037037037037) internal successors, (82), 29 states have internal predecessors, (82), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 180 [2023-11-28 20:22:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:51,992 INFO L225 Difference]: With dead ends: 378 [2023-11-28 20:22:51,992 INFO L226 Difference]: Without dead ends: 205 [2023-11-28 20:22:51,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-11-28 20:22:51,994 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 16 mSDsluCounter, 2881 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3125 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:51,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 3125 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-28 20:22:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-28 20:22:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-11-28 20:22:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:22:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 275 transitions. [2023-11-28 20:22:52,002 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 275 transitions. Word has length 180 [2023-11-28 20:22:52,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:52,003 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 275 transitions. [2023-11-28 20:22:52,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.037037037037037) internal successors, (82), 29 states have internal predecessors, (82), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-11-28 20:22:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 275 transitions. [2023-11-28 20:22:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-28 20:22:52,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:52,005 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:52,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-28 20:22:52,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:52,205 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:52,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:52,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1915721537, now seen corresponding path program 10 times [2023-11-28 20:22:52,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:52,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423080237] [2023-11-28 20:22:52,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:52,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:52,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:22:52,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191141747] [2023-11-28 20:22:52,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:22:52,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:52,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:52,293 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:52,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:22:54,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:22:54,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:22:54,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 2830 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-28 20:22:54,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 135 proven. 55 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2023-11-28 20:22:54,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 129 proven. 55 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2023-11-28 20:22:55,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:55,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423080237] [2023-11-28 20:22:55,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:22:55,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191141747] [2023-11-28 20:22:55,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191141747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:55,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:22:55,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2023-11-28 20:22:55,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500020965] [2023-11-28 20:22:55,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:55,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-28 20:22:55,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:55,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-28 20:22:55,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2023-11-28 20:22:55,332 INFO L87 Difference]: Start difference. First operand 205 states and 275 transitions. Second operand has 31 states, 29 states have (on average 2.896551724137931) internal successors, (84), 31 states have internal predecessors, (84), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-28 20:22:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:57,755 INFO L93 Difference]: Finished difference Result 380 states and 504 transitions. [2023-11-28 20:22:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:22:57,756 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.896551724137931) internal successors, (84), 31 states have internal predecessors, (84), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 182 [2023-11-28 20:22:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:57,758 INFO L225 Difference]: With dead ends: 380 [2023-11-28 20:22:57,758 INFO L226 Difference]: Without dead ends: 206 [2023-11-28 20:22:57,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:22:57,760 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 11 mSDsluCounter, 4324 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4568 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:57,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 4568 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-28 20:22:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-28 20:22:57,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-11-28 20:22:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 127 states have (on average 1.2125984251968505) internal successors, (154), 129 states have internal predecessors, (154), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-28 20:22:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 276 transitions. [2023-11-28 20:22:57,768 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 276 transitions. Word has length 182 [2023-11-28 20:22:57,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:57,768 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 276 transitions. [2023-11-28 20:22:57,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.896551724137931) internal successors, (84), 31 states have internal predecessors, (84), 6 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2023-11-28 20:22:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 276 transitions. [2023-11-28 20:22:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-11-28 20:22:57,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:57,770 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 12, 12, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:57,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-28 20:22:57,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:22:57,971 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:57,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash 163479625, now seen corresponding path program 11 times [2023-11-28 20:22:57,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:57,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544909676] [2023-11-28 20:22:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:57,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:58,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:22:58,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131262153] [2023-11-28 20:22:58,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:22:58,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:58,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:58,051 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:58,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8dde157-8274-4d6a-b867-38c70cee4858/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process