./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 16:56:37,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:56:37,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:56:37,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:56:37,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:56:37,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:56:37,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:56:37,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:56:37,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:56:37,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:56:37,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:56:37,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:56:37,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:56:37,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:56:37,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:56:37,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:56:37,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:56:37,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:56:37,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:56:37,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:56:37,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:56:37,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:56:37,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:56:37,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:56:37,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:56:37,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:56:37,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:56:37,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:56:37,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:56:37,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:56:37,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:56:37,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:56:37,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:56:37,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:56:37,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:56:37,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:56:37,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:56:37,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:56:37,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:56:37,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:56:37,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:56:37,456 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-25 16:56:37,494 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:56:37,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:56:37,495 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:56:37,495 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:56:37,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:56:37,497 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:56:37,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:56:37,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:56:37,498 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:56:37,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:56:37,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:56:37,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:56:37,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:56:37,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:56:37,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:56:37,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:56:37,501 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:56:37,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:56:37,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:56:37,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:56:37,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:56:37,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:56:37,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:56:37,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:56:37,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:56:37,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:56:37,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:56:37,504 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:56:37,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:56:37,505 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:56:37,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:56:37,505 INFO L138 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_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2022-11-25 16:56:37,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:56:37,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:56:37,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:56:37,815 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:56:37,816 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:56:37,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2022-11-25 16:56:41,112 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:56:41,667 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:56:41,669 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2022-11-25 16:56:41,715 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/data/81279eb0c/b075e917a6ff4d11aa925439787efa43/FLAGd73edb650 [2022-11-25 16:56:41,736 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/data/81279eb0c/b075e917a6ff4d11aa925439787efa43 [2022-11-25 16:56:41,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:56:41,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:56:41,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:56:41,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:56:41,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:56:41,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:56:41" (1/1) ... [2022-11-25 16:56:41,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca8e584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:41, skipping insertion in model container [2022-11-25 16:56:41,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:56:41" (1/1) ... [2022-11-25 16:56:41,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:56:41,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:56:42,123 WARN L237 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_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2022-11-25 16:56:42,132 WARN L237 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_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2022-11-25 16:56:43,083 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 16:56:43,173 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,174 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,175 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,176 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,177 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,191 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,192 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,194 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,195 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,197 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,199 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,200 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,200 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,319 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:56:43,319 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:56:43,321 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:56:43,337 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 16:56:43,340 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 16:56:43,341 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 16:56:43,628 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 16:56:43,630 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 16:56:43,632 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 16:56:43,634 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 16:56:43,638 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 16:56:43,643 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 16:56:43,647 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 16:56:43,649 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 16:56:43,650 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 16:56:43,658 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 16:56:43,659 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 16:56:43,817 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,824 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:43,887 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 16:56:43,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:56:43,944 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:56:43,975 WARN L237 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_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2022-11-25 16:56:43,975 WARN L237 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_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2022-11-25 16:56:44,032 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 16:56:44,062 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,062 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,063 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,063 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,064 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,071 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,072 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,073 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,073 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,074 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,075 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,076 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,076 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,083 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:56:44,085 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:56:44,086 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 16:56:44,089 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 16:56:44,092 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 16:56:44,093 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 16:56:44,119 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 16:56:44,120 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 16:56:44,120 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 16:56:44,121 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 16:56:44,128 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 16:56:44,130 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 16:56:44,131 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 16:56:44,132 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 16:56:44,132 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 16:56:44,133 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 16:56:44,133 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 16:56:44,155 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,171 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 16:56:44,203 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 16:56:44,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:56:44,402 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:56:44,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44 WrapperNode [2022-11-25 16:56:44,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:56:44,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:56:44,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:56:44,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:56:44,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,542 INFO L138 Inliner]: procedures = 690, calls = 1552, calls flagged for inlining = 48, calls inlined = 7, statements flattened = 576 [2022-11-25 16:56:44,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:56:44,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:56:44,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:56:44,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:56:44,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,598 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:56:44,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:56:44,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:56:44,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:56:44,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (1/1) ... [2022-11-25 16:56:44,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:56:44,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:44,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:56:44,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:56:44,708 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-25 16:56:44,709 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-25 16:56:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:56:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2022-11-25 16:56:44,709 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2022-11-25 16:56:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-11-25 16:56:44,709 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-11-25 16:56:44,709 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-25 16:56:44,710 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-25 16:56:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:56:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-25 16:56:44,710 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-25 16:56:44,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 16:56:44,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 16:56:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 16:56:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:56:44,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 16:56:44,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:56:44,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:56:44,713 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-25 16:56:44,713 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-25 16:56:44,713 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-11-25 16:56:44,713 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-11-25 16:56:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-25 16:56:44,714 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-25 16:56:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-25 16:56:44,714 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-25 16:56:44,714 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 16:56:44,715 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 16:56:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:56:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 16:56:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 16:56:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-25 16:56:44,715 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-25 16:56:44,715 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-11-25 16:56:44,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-11-25 16:56:44,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:56:44,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:56:45,109 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:56:45,111 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:56:46,159 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:56:46,168 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:56:46,168 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 16:56:46,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:56:46 BoogieIcfgContainer [2022-11-25 16:56:46,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:56:46,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:56:46,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:56:46,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:56:46,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:56:41" (1/3) ... [2022-11-25 16:56:46,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350a4914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:56:46, skipping insertion in model container [2022-11-25 16:56:46,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:56:44" (2/3) ... [2022-11-25 16:56:46,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350a4914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:56:46, skipping insertion in model container [2022-11-25 16:56:46,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:56:46" (3/3) ... [2022-11-25 16:56:46,205 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2022-11-25 16:56:46,227 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:56:46,228 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:56:46,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:56:46,315 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b57db9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:56:46,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 16:56:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-25 16:56:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 16:56:46,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:46,341 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-25 16:56:46,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1460968734, now seen corresponding path program 1 times [2022-11-25 16:56:46,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:46,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073344497] [2022-11-25 16:56:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:46,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:47,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:56:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:47,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 16:56:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:47,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:56:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:47,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 16:56:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:47,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 16:56:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:47,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:56:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:47,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-25 16:56:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:47,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 16:56:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:47,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-25 16:56:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 16:56:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073344497] [2022-11-25 16:56:47,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073344497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:56:47,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:56:47,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:56:47,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692961177] [2022-11-25 16:56:47,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:56:47,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:56:47,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:47,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:56:47,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:56:47,292 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-25 16:56:47,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:47,771 INFO L93 Difference]: Finished difference Result 228 states and 297 transitions. [2022-11-25 16:56:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:56:47,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2022-11-25 16:56:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:47,787 INFO L225 Difference]: With dead ends: 228 [2022-11-25 16:56:47,787 INFO L226 Difference]: Without dead ends: 114 [2022-11-25 16:56:47,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:56:47,799 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 35 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:47,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 130 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:56:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-25 16:56:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-11-25 16:56:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 16:56:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2022-11-25 16:56:47,878 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2022-11-25 16:56:47,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:47,879 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2022-11-25 16:56:47,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-25 16:56:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2022-11-25 16:56:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 16:56:47,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:47,892 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-25 16:56:47,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:56:47,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1894775411, now seen corresponding path program 1 times [2022-11-25 16:56:47,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:47,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203500052] [2022-11-25 16:56:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:47,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 16:56:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 16:56:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 16:56:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 16:56:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 16:56:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 16:56:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-25 16:56:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 16:56:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-25 16:56:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-25 16:56:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 16:56:48,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:48,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203500052] [2022-11-25 16:56:48,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203500052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:56:48,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:56:48,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 16:56:48,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393664519] [2022-11-25 16:56:48,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:56:48,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:56:48,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:56:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:56:48,658 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 16:56:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:49,281 INFO L93 Difference]: Finished difference Result 199 states and 243 transitions. [2022-11-25 16:56:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:56:49,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2022-11-25 16:56:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:49,283 INFO L225 Difference]: With dead ends: 199 [2022-11-25 16:56:49,283 INFO L226 Difference]: Without dead ends: 126 [2022-11-25 16:56:49,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:56:49,285 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 93 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:49,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 287 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 16:56:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-25 16:56:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2022-11-25 16:56:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-25 16:56:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2022-11-25 16:56:49,301 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 71 [2022-11-25 16:56:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:49,302 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2022-11-25 16:56:49,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 16:56:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2022-11-25 16:56:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 16:56:49,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:49,305 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-25 16:56:49,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:56:49,305 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1692678563, now seen corresponding path program 1 times [2022-11-25 16:56:49,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:49,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183726711] [2022-11-25 16:56:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:49,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:49,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:49,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036037511] [2022-11-25 16:56:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:49,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:49,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:49,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:49,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:56:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 16:56:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 16:56:50,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:56:50,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:50,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183726711] [2022-11-25 16:56:50,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:50,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036037511] [2022-11-25 16:56:50,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036037511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:56:50,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:56:50,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 16:56:50,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719937177] [2022-11-25 16:56:50,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:56:50,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:56:50,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:56:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:56:50,047 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-25 16:56:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:50,130 INFO L93 Difference]: Finished difference Result 190 states and 229 transitions. [2022-11-25 16:56:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:56:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 86 [2022-11-25 16:56:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:50,138 INFO L225 Difference]: With dead ends: 190 [2022-11-25 16:56:50,138 INFO L226 Difference]: Without dead ends: 117 [2022-11-25 16:56:50,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:56:50,144 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 4 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:50,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 877 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:56:50,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-25 16:56:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2022-11-25 16:56:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-25 16:56:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2022-11-25 16:56:50,169 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 86 [2022-11-25 16:56:50,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:50,170 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2022-11-25 16:56:50,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-25 16:56:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2022-11-25 16:56:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 16:56:50,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:50,175 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-25 16:56:50,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 16:56:50,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:50,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:50,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash -124616364, now seen corresponding path program 1 times [2022-11-25 16:56:50,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:50,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239901798] [2022-11-25 16:56:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:50,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:50,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:50,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965043272] [2022-11-25 16:56:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:50,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:50,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:50,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:50,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:56:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:50,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 2122 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 16:56:50,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 16:56:50,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:56:50,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:50,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239901798] [2022-11-25 16:56:50,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:50,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965043272] [2022-11-25 16:56:50,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965043272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:56:50,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:56:50,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:56:50,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003963400] [2022-11-25 16:56:50,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:56:50,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:56:50,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:50,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:56:50,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:56:50,963 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 16:56:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:50,987 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2022-11-25 16:56:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:56:50,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2022-11-25 16:56:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:50,990 INFO L225 Difference]: With dead ends: 134 [2022-11-25 16:56:50,990 INFO L226 Difference]: Without dead ends: 114 [2022-11-25 16:56:50,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:56:50,991 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 2 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:50,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 382 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:56:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-25 16:56:51,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-11-25 16:56:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 78 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-25 16:56:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-11-25 16:56:51,004 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 86 [2022-11-25 16:56:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:51,005 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-11-25 16:56:51,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 16:56:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-11-25 16:56:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 16:56:51,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:51,007 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-25 16:56:51,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:51,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:51,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash -117447722, now seen corresponding path program 1 times [2022-11-25 16:56:51,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:51,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166327468] [2022-11-25 16:56:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:51,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:51,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:51,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867878862] [2022-11-25 16:56:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:51,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:51,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:51,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:51,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:56:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:51,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 16:56:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 16:56:51,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:56:51,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:51,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166327468] [2022-11-25 16:56:51,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:51,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867878862] [2022-11-25 16:56:51,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867878862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:56:51,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:56:51,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:56:51,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243681580] [2022-11-25 16:56:51,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:56:51,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:56:51,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:56:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:56:51,907 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 16:56:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:51,953 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2022-11-25 16:56:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:56:51,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2022-11-25 16:56:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:51,957 INFO L225 Difference]: With dead ends: 166 [2022-11-25 16:56:51,957 INFO L226 Difference]: Without dead ends: 119 [2022-11-25 16:56:51,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:56:51,958 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:51,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:56:51,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-25 16:56:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-11-25 16:56:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 79 states have internal predecessors, (93), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-25 16:56:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2022-11-25 16:56:51,985 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 87 [2022-11-25 16:56:51,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:51,986 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2022-11-25 16:56:51,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 16:56:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2022-11-25 16:56:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 16:56:51,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:51,994 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-25 16:56:52,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:52,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:52,200 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:52,200 INFO L85 PathProgramCache]: Analyzing trace with hash 995990719, now seen corresponding path program 1 times [2022-11-25 16:56:52,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:52,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569498866] [2022-11-25 16:56:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:52,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:52,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:52,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465173677] [2022-11-25 16:56:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:52,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:52,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:52,269 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:52,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:56:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:52,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:56:52,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 16:56:52,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:56:52,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569498866] [2022-11-25 16:56:52,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465173677] [2022-11-25 16:56:52,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465173677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:56:52,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:56:52,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:56:52,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431004037] [2022-11-25 16:56:52,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:56:52,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:56:52,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:52,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:56:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:56:52,803 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 16:56:52,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:52,862 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2022-11-25 16:56:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:56:52,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2022-11-25 16:56:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:52,865 INFO L225 Difference]: With dead ends: 160 [2022-11-25 16:56:52,865 INFO L226 Difference]: Without dead ends: 117 [2022-11-25 16:56:52,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:56:52,866 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 4 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:52,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 506 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:56:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-25 16:56:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2022-11-25 16:56:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 79 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-25 16:56:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2022-11-25 16:56:52,877 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 87 [2022-11-25 16:56:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:52,878 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2022-11-25 16:56:52,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 16:56:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2022-11-25 16:56:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-25 16:56:52,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:52,880 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-25 16:56:52,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 16:56:53,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:53,090 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash -462422751, now seen corresponding path program 1 times [2022-11-25 16:56:53,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:53,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078065325] [2022-11-25 16:56:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:53,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:53,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:53,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650532293] [2022-11-25 16:56:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:53,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:53,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:53,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:53,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:56:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 2148 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-25 16:56:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:54,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-25 16:56:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 16:56:54,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:55,533 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-25 16:56:55,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2022-11-25 16:56:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 16:56:55,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:55,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078065325] [2022-11-25 16:56:55,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:55,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650532293] [2022-11-25 16:56:55,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650532293] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:56:55,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:56:55,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 26 [2022-11-25 16:56:55,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874458836] [2022-11-25 16:56:55,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:56:55,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:56:55,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:55,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:56:55,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:56:55,636 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand has 11 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-25 16:56:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:57,864 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-11-25 16:56:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 16:56:57,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2022-11-25 16:56:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:57,875 INFO L225 Difference]: With dead ends: 127 [2022-11-25 16:56:57,875 INFO L226 Difference]: Without dead ends: 122 [2022-11-25 16:56:57,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-11-25 16:56:57,879 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 69 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:57,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 302 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 16:56:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-25 16:56:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2022-11-25 16:56:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 80 states have (on average 1.1875) internal successors, (95), 82 states have internal predecessors, (95), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2022-11-25 16:56:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2022-11-25 16:56:57,912 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 90 [2022-11-25 16:56:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:57,913 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2022-11-25 16:56:57,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-25 16:56:57,914 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2022-11-25 16:56:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 16:56:57,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:57,916 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:57,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:58,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 16:56:58,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash -910834864, now seen corresponding path program 2 times [2022-11-25 16:56:58,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:58,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963894056] [2022-11-25 16:56:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:58,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:58,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:58,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189984032] [2022-11-25 16:56:58,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:56:58,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:58,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:58,199 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:58,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:56:58,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:56:58,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 16:56:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 16:56:58,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 16:56:59,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:59,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963894056] [2022-11-25 16:56:59,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:59,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189984032] [2022-11-25 16:56:59,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189984032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:59,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:59,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 16:56:59,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044332342] [2022-11-25 16:56:59,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:59,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:56:59,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:59,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:56:59,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:56:59,165 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 16:56:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:59,315 INFO L93 Difference]: Finished difference Result 184 states and 220 transitions. [2022-11-25 16:56:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:56:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2022-11-25 16:56:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:59,318 INFO L225 Difference]: With dead ends: 184 [2022-11-25 16:56:59,318 INFO L226 Difference]: Without dead ends: 130 [2022-11-25 16:56:59,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:56:59,319 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 23 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:59,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 387 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:56:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-25 16:56:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2022-11-25 16:56:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 90 states have internal predecessors, (105), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2022-11-25 16:56:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2022-11-25 16:56:59,349 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 93 [2022-11-25 16:56:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:59,349 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2022-11-25 16:56:59,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-25 16:56:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2022-11-25 16:56:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-25 16:56:59,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:59,352 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:59,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:59,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 16:56:59,563 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash -694247519, now seen corresponding path program 1 times [2022-11-25 16:56:59,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:59,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185873334] [2022-11-25 16:56:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:59,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:59,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:59,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340052136] [2022-11-25 16:56:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:59,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:59,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:59,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:59,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:57:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 2185 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 16:57:00,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 16:57:00,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:57:00,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:00,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185873334] [2022-11-25 16:57:00,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:57:00,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340052136] [2022-11-25 16:57:00,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340052136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:57:00,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:57:00,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 16:57:00,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747851697] [2022-11-25 16:57:00,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:57:00,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 16:57:00,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:00,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 16:57:00,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:57:00,352 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-25 16:57:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:00,643 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2022-11-25 16:57:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:57:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 96 [2022-11-25 16:57:00,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:00,649 INFO L225 Difference]: With dead ends: 181 [2022-11-25 16:57:00,649 INFO L226 Difference]: Without dead ends: 124 [2022-11-25 16:57:00,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:57:00,653 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 157 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:00,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 431 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:57:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-25 16:57:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-25 16:57:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 88 states have internal predecessors, (103), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-25 16:57:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2022-11-25 16:57:00,688 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 96 [2022-11-25 16:57:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:00,688 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2022-11-25 16:57:00,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-25 16:57:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2022-11-25 16:57:00,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 16:57:00,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:00,694 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:00,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:00,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:00,906 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:57:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:00,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1799659061, now seen corresponding path program 1 times [2022-11-25 16:57:00,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:00,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038793669] [2022-11-25 16:57:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:00,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:00,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:57:00,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103556865] [2022-11-25 16:57:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:00,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:00,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:00,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:01,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:57:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:01,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 16:57:01,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 16:57:01,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-25 16:57:01,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:01,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038793669] [2022-11-25 16:57:01,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:57:01,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103556865] [2022-11-25 16:57:01,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103556865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:57:01,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:57:01,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 16:57:01,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633901469] [2022-11-25 16:57:01,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:01,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:57:01,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:01,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:57:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:57:01,808 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:57:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:01,914 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2022-11-25 16:57:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:57:01,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2022-11-25 16:57:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:01,929 INFO L225 Difference]: With dead ends: 161 [2022-11-25 16:57:01,929 INFO L226 Difference]: Without dead ends: 127 [2022-11-25 16:57:01,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:57:01,930 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:01,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 381 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:57:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-25 16:57:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-25 16:57:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 91 states have internal predecessors, (106), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-25 16:57:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 151 transitions. [2022-11-25 16:57:01,955 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 151 transitions. Word has length 111 [2022-11-25 16:57:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:01,956 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 151 transitions. [2022-11-25 16:57:01,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:57:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 151 transitions. [2022-11-25 16:57:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-25 16:57:01,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:01,960 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:01,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:02,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 16:57:02,163 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:57:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:02,163 INFO L85 PathProgramCache]: Analyzing trace with hash -564772413, now seen corresponding path program 2 times [2022-11-25 16:57:02,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:02,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452385170] [2022-11-25 16:57:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:02,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:02,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:57:02,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879157651] [2022-11-25 16:57:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:57:02,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:02,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:02,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:02,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:57:03,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:57:03,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:57:03,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 2383 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-25 16:57:03,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:03,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:57:03,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 16:57:03,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:03,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-25 16:57:03,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:03,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2022-11-25 16:57:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 16:57:04,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:05,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 702 treesize of output 690 [2022-11-25 16:57:06,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-25 16:57:06,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 590 treesize of output 586 [2022-11-25 16:57:06,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-25 16:57:06,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1010 treesize of output 994 [2022-11-25 16:57:06,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-25 16:57:06,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2370 treesize of output 2338 [2022-11-25 16:57:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 16:57:07,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:07,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452385170] [2022-11-25 16:57:07,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:57:07,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879157651] [2022-11-25 16:57:07,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879157651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:57:07,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:57:07,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2022-11-25 16:57:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307834836] [2022-11-25 16:57:07,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:07,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 16:57:07,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 16:57:07,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-11-25 16:57:07,729 INFO L87 Difference]: Start difference. First operand 127 states and 151 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 28 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-25 16:57:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:11,904 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2022-11-25 16:57:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 16:57:11,905 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 28 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 114 [2022-11-25 16:57:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:11,907 INFO L225 Difference]: With dead ends: 159 [2022-11-25 16:57:11,907 INFO L226 Difference]: Without dead ends: 147 [2022-11-25 16:57:11,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 16:57:11,909 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 49 mSDsluCounter, 2211 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:11,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2335 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 16:57:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-25 16:57:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2022-11-25 16:57:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 99 states have internal predecessors, (116), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-25 16:57:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2022-11-25 16:57:11,940 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 114 [2022-11-25 16:57:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:11,941 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2022-11-25 16:57:11,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 28 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-25 16:57:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2022-11-25 16:57:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-25 16:57:11,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:11,944 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:11,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:12,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:12,171 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:57:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash -582835346, now seen corresponding path program 3 times [2022-11-25 16:57:12,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:12,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027399121] [2022-11-25 16:57:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:12,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:57:12,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713682393] [2022-11-25 16:57:12,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:57:12,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:12,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:12,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:12,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:57:13,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 16:57:13,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:57:13,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 2361 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 16:57:13,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:14,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:57:14,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 16:57:14,370 INFO L321 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2022-11-25 16:57:14,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 16:57:14,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:14,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2022-11-25 16:57:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 16:57:15,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:16,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 690 treesize of output 678 [2022-11-25 16:57:17,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-25 16:57:17,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 534 treesize of output 530 [2022-11-25 16:57:18,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-25 16:57:18,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 526 treesize of output 518 [2022-11-25 16:57:18,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-25 16:57:18,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1182 treesize of output 1166 [2022-11-25 16:57:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 16:57:19,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:19,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027399121] [2022-11-25 16:57:19,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:57:19,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713682393] [2022-11-25 16:57:19,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713682393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:57:19,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:57:19,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 36 [2022-11-25 16:57:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273323957] [2022-11-25 16:57:19,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:19,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 16:57:19,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:19,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 16:57:19,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 16:57:19,479 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand has 36 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 7 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-25 16:57:21,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 16:57:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:28,249 INFO L93 Difference]: Finished difference Result 161 states and 188 transitions. [2022-11-25 16:57:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 16:57:28,250 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 7 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) Word has length 117 [2022-11-25 16:57:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:28,251 INFO L225 Difference]: With dead ends: 161 [2022-11-25 16:57:28,251 INFO L226 Difference]: Without dead ends: 154 [2022-11-25 16:57:28,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 16:57:28,254 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 63 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:28,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 2104 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1215 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-25 16:57:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-25 16:57:28,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 139. [2022-11-25 16:57:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 102 states have internal predecessors, (119), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-25 16:57:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2022-11-25 16:57:28,285 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 117 [2022-11-25 16:57:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:28,285 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2022-11-25 16:57:28,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 32 states have internal predecessors, (97), 7 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (20), 9 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-25 16:57:28,286 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2022-11-25 16:57:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-25 16:57:28,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:28,288 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:28,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:28,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:28,503 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:57:28,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1824760349, now seen corresponding path program 4 times [2022-11-25 16:57:28,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:28,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588813242] [2022-11-25 16:57:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:28,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:28,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:57:28,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483181008] [2022-11-25 16:57:28,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:57:28,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:28,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:28,592 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:28,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:57:29,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:57:29,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:57:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2397 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-25 16:57:29,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:29,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:57:29,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 16:57:29,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:29,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-25 16:57:29,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:29,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2022-11-25 16:57:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 16:57:30,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:31,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 89 [2022-11-25 16:57:32,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-25 16:57:32,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 286 [2022-11-25 16:57:32,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-25 16:57:32,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 238 [2022-11-25 16:57:32,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-25 16:57:32,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 254 [2022-11-25 16:57:32,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-25 16:57:32,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 230 [2022-11-25 16:57:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 16:57:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:33,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588813242] [2022-11-25 16:57:33,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:57:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483181008] [2022-11-25 16:57:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483181008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:57:33,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:57:33,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2022-11-25 16:57:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876293432] [2022-11-25 16:57:33,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:33,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 16:57:33,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:33,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 16:57:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 16:57:33,242 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 35 states, 35 states have (on average 3.0) internal successors, (105), 32 states have internal predecessors, (105), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-25 16:57:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:36,283 INFO L93 Difference]: Finished difference Result 162 states and 188 transitions. [2022-11-25 16:57:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 16:57:36,284 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 32 states have internal predecessors, (105), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 120 [2022-11-25 16:57:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:36,286 INFO L225 Difference]: With dead ends: 162 [2022-11-25 16:57:36,286 INFO L226 Difference]: Without dead ends: 155 [2022-11-25 16:57:36,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 16:57:36,288 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 61 mSDsluCounter, 1830 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:36,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1959 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-25 16:57:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-25 16:57:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 142. [2022-11-25 16:57:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 105 states have (on average 1.161904761904762) internal successors, (122), 105 states have internal predecessors, (122), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-25 16:57:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 166 transitions. [2022-11-25 16:57:36,317 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 166 transitions. Word has length 120 [2022-11-25 16:57:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:36,318 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 166 transitions. [2022-11-25 16:57:36,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 32 states have internal predecessors, (105), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-25 16:57:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 166 transitions. [2022-11-25 16:57:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-25 16:57:36,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:36,321 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:36,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-25 16:57:36,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 16:57:36,534 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:57:36,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:36,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1130730318, now seen corresponding path program 5 times [2022-11-25 16:57:36,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:36,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986207619] [2022-11-25 16:57:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:36,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:36,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:57:36,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218853045] [2022-11-25 16:57:36,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:57:36,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:36,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:36,639 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:36,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:57:41,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 16:57:41,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:57:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 16:57:41,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-25 16:57:41,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 16:57:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:41,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986207619] [2022-11-25 16:57:41,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:57:41,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218853045] [2022-11-25 16:57:41,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218853045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:57:41,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:57:41,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-25 16:57:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662675650] [2022-11-25 16:57:41,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:41,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 16:57:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:41,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 16:57:41,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:57:41,453 INFO L87 Difference]: Start difference. First operand 142 states and 166 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:57:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:42,107 INFO L93 Difference]: Finished difference Result 178 states and 208 transitions. [2022-11-25 16:57:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 16:57:42,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 123 [2022-11-25 16:57:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:42,110 INFO L225 Difference]: With dead ends: 178 [2022-11-25 16:57:42,111 INFO L226 Difference]: Without dead ends: 148 [2022-11-25 16:57:42,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-11-25 16:57:42,112 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:42,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 760 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:57:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-25 16:57:42,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-25 16:57:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 111 states have internal predecessors, (128), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-25 16:57:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2022-11-25 16:57:42,146 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 123 [2022-11-25 16:57:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:42,147 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2022-11-25 16:57:42,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-25 16:57:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2022-11-25 16:57:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 16:57:42,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:42,149 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:42,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:42,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 16:57:42,351 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:57:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:42,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1187340430, now seen corresponding path program 6 times [2022-11-25 16:57:42,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:42,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811701282] [2022-11-25 16:57:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:42,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:42,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:57:42,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321468435] [2022-11-25 16:57:42,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:57:42,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:42,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:42,440 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:42,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:57:53,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-25 16:57:53,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:57:53,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-25 16:57:53,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:53,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:57:53,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 16:57:53,378 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 16:57:53,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-11-25 16:57:53,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:53,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2022-11-25 16:57:53,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:53,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 58 [2022-11-25 16:57:53,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:53,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 70 [2022-11-25 16:57:53,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:53,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 82 [2022-11-25 16:57:53,760 INFO L321 Elim1Store]: treesize reduction 126, result has 33.7 percent of original size [2022-11-25 16:57:53,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 95 [2022-11-25 16:57:53,933 INFO L321 Elim1Store]: treesize reduction 182, result has 26.0 percent of original size [2022-11-25 16:57:53,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 88 treesize of output 108 [2022-11-25 16:57:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 14 proven. 55 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-25 16:57:54,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:57:54,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:54,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811701282] [2022-11-25 16:57:54,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:57:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321468435] [2022-11-25 16:57:54,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321468435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:57:54,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:57:54,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-25 16:57:54,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851723080] [2022-11-25 16:57:54,712 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 16:57:54,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 16:57:54,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:54,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 16:57:54,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2022-11-25 16:57:54,714 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 5 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-25 16:57:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:55,815 INFO L93 Difference]: Finished difference Result 179 states and 205 transitions. [2022-11-25 16:57:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 16:57:55,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 5 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 129 [2022-11-25 16:57:55,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:55,817 INFO L225 Difference]: With dead ends: 179 [2022-11-25 16:57:55,818 INFO L226 Difference]: Without dead ends: 151 [2022-11-25 16:57:55,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2022-11-25 16:57:55,819 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 38 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:55,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1657 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 16:57:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-25 16:57:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-11-25 16:57:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 112 states have internal predecessors, (129), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-25 16:57:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 173 transitions. [2022-11-25 16:57:55,851 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 173 transitions. Word has length 129 [2022-11-25 16:57:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:55,852 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 173 transitions. [2022-11-25 16:57:55,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 5 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-25 16:57:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 173 transitions. [2022-11-25 16:57:55,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 16:57:55,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:55,853 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:55,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:57:56,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 16:57:56,059 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:57:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1804795484, now seen corresponding path program 7 times [2022-11-25 16:57:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:56,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10299922] [2022-11-25 16:57:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:56,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:56,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:57:56,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345645633] [2022-11-25 16:57:56,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:57:56,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:57:56,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:56,135 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:57:56,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b9d513f-c93e-4ea0-a0cd-105cb9fe0555/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 16:57:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:57,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-25 16:57:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:57:57,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 16:57:57,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 16:57:57,808 INFO L321 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2022-11-25 16:57:57,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 16:57:57,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:57,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2022-11-25 16:57:57,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:57,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2022-11-25 16:57:57,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:57,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2022-11-25 16:57:58,060 INFO L321 Elim1Store]: treesize reduction 106, result has 33.3 percent of original size [2022-11-25 16:57:58,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 67 treesize of output 81 [2022-11-25 16:57:58,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:58,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2022-11-25 16:57:58,258 INFO L321 Elim1Store]: treesize reduction 124, result has 33.3 percent of original size [2022-11-25 16:57:58,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 93 [2022-11-25 16:57:58,423 INFO L321 Elim1Store]: treesize reduction 180, result has 25.6 percent of original size [2022-11-25 16:57:58,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 86 treesize of output 106 [2022-11-25 16:57:58,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:57:58,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2022-11-25 16:58:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 11 proven. 94 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 16:58:00,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:05,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11115578 treesize of output 11114042 [2022-11-25 17:10:19,214 WARN L233 SmtUtils]: Spent 12.23m on a formula simplification. DAG size of input: 502 DAG size of output: 458 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 17:10:56,434 WARN L233 SmtUtils]: Spent 9.21s on a formula simplification that was a NOOP. DAG size: 434 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 17:11:30,913 WARN L233 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 427 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)